Corometrics™ 250cx Series Monitor

GE Healthcare
Corometrics™ 250cx Series Monitor
Service Manual
Corometrics 250cx Series Monitor English
2036947-001 Revision J
© 2013 General Electric Company.
All Rights Reserved
GE Healthcare
Corometrics™ 250cx Series Monitor
Service Manual
Corometrics 250cx Series Monitor English
2036947-001 Revision J
© 2013 General Electric Company.
All Rights Reserved
© 2005 - 2013 by General Electric Company
All rights reserved. General Electric Company reserves the right to make changes in specifications and features
shown herein, or discontinue the product described at any time without notice or obligation. Contact your
GE Representative for the most current information. SuperSTAT™ is the property of GE MEDICAL SYSTEMS
Information Technologies, a GE Healthcare Company which is a division of General Electric Corporation. GE and
GE Monogram are trademarks of General Electric Company. All other company and product names mentioned
may be trademarks of the companies with which they are associated.
Warranty
This product is sold by GE Healthcare with a GE repair warranty period of 12-month to cover labor and parts*
(except for the expendable parts like fuses or batteries which have a 30-day warranty) under the terms and
conditions set forth in the GE Healthcare Warranty Statement presented to the customer at the point of sale.
* The warranty time may vary in some regions. Refer to the warranty information provided at the point of sale.
ПРЕДУПРЕЖДЕНИЕ
Това упътване за работа е налично само на английски език.
(BG)
• Ако доставчикът на услугата на клиента изиска друг език, задължение на клиента е
да осигури превод.
• Не използвайте оборудването, преди да сте се консултирали и разбрали упътването
за работа.
• Неспазването на това предупреждение може да доведе до нараняване на
доставчика на услугата, оператора или пациентa в резултат на токов удар,
механична или друга опасност.
警告
本维修手册仅提供英文版本。
(ZH-CN)
• 如果客户的维修服务人员需要非英文版本,则客户需自行提供翻译服务。
• 未详细阅读和完全理解本维修手册之前,不得进行维修。
• 忽略本警告可能对维修服务人员、操作人员或患者造成电击、机械伤害或其他形式的
伤害。
警告
本服務手冊僅提供英文版本。
(ZH-HK)
• 倘若客戶的服務供應商需要英文以外之服務手冊,客戶有責任提供翻譯服務。
• 除非已參閱本服務手冊及明白其內容,否則切勿嘗試維修設備。
• 不遵從本警告或會令服務供應商、網絡供應商或病人受到觸電、機械性或其他的危
險。
警告
本維修手冊僅有英文版。
(ZH-TW)
• 若客戶的維修廠商需要英文版以外的語言,應由客戶自行提供翻譯服務。
• 請勿試圖維修本設備,除非 您已查閱並瞭解本維修手冊。
• 若未留意本警告,可能導致維修廠商、操作員或病患因觸電、機械或其他危險而受
傷。
UPOZORENJE
Ovaj servisni priručnik dostupan je na engleskom jeziku.
(HR)
• Ako davatelj usluge klijenta treba neki drugi jezik, klijent je dužan osigurati prijevod.
• Ne pokušavajte servisirati opremu ako niste u potpunosti pročitali i razumjeli ovaj
servisni priručnik.
• Zanemarite li ovo upozorenje, može doći do ozljede davatelja usluge, operatera ili
pacijenta uslijed strujnog udara, mehaničkih ili drugih rizika.
VÝSTRAHA
Tento provozní návod existuje pouze v anglickém jazyce.
(CS)
• V případě, že externí služba zákazníkům potřebuje návod v jiném jazyce, je zajištění
překladu do odpovídajícího jazyka úkolem zákazníka.
• Nesnažte se o údržbu tohoto zařízení, aniž byste si přečetli tento provozní návod a
pochopili jeho obsah.
• V případě nedodržování této výstrahy může dojít k poranění pracovníka prodejního
servisu, obslužného personálu nebo pacientů vlivem elektrického proudu, respektive
vlivem mechanických či jiných rizik.
ADVARSEL
Denne servicemanual findes kun på engelsk.
(DA)
• Hvis en kundes tekniker har brug for et andet sprog end engelsk, er det kundens ansvar
at sørge for oversættelse.
• Forsøg ikke at servicere udstyret uden at læse og forstå denne servicemanual.
• Manglende overholdelse af denne advarsel kan medføre skade på grund af elektrisk
stød, mekanisk eller anden fare for teknikeren, operatøren eller patienten.
WAARSCHUWING
Deze onderhoudshandleiding is enkel in het Engels verkrijgbaar.
(NL)
• Als het onderhoudspersoneel een andere taal vereist, dan is de klant verantwoordelijk
voor de vertaling ervan.
• Probeer de apparatuur niet te onderhouden alvorens deze onderhoudshandleiding werd
geraadpleegd en begrepen is.
• Indien deze waarschuwing niet wordt opgevolgd, zou het onderhoudspersoneel, de
operator of een patiënt gewond kunnen raken als gevolg van een elektrische schok,
mechanische of andere gevaren.
WARNING:
This service manual is available in English only.
(EN)
• If a customer’s service provider requires a language other than English, it is the
customer’s responsibility to provide translation services.
• Do not attempt to service the equipment unless this service manual has been consulted
and is understood.
• Failure to heed this warning may result in injury to the service provider, operator, or
patient from electric shock, mechanical hazards, or other hazards.
HOIATUS
See teenindusjuhend on saadaval ainult inglise keeles
(ET)
• Kui klienditeeninduse osutaja nõuab juhendit inglise keelest erinevas keeles, vastutab
klient tõlketeenuse osutamise eest.
• Ärge üritage seadmeid teenindada enne eelnevalt käesoleva teenindusjuhendiga
tutvumist ja sellest aru saamist.
• Käesoleva hoiatuse eiramine võib põhjustada teenuseosutaja, operaatori või patsiendi
vigastamist elektrilöögi, mehaanilise või muu ohu tagajärjel.
VAROITUS
Tämä huolto-ohje on saatavilla vain englanniksi.
(FI)
• Jos asiakkaan huoltohenkilöstö vaatii muuta kuin englanninkielistä materiaalia,
tarvittavan käännöksen hankkiminen on asiakkaan vastuulla.
• Älä yritä korjata laitteistoa ennen kuin olet varmasti lukenut ja ymmärtänyt tämän
huolto-ohjeen.
• Mikäli tätä varoitusta ei noudateta, seurauksena voi olla huoltohenkilöstön, laitteiston
käyttäjän tai potilaan vahingoittuminen sähköiskun, mekaanisen vian tai muun
vaaratilanteen vuoksi.
ATTENTION
Ce manuel d’installation et de maintenance est disponible uniquement en anglais.
(FR)
• Si le technicien d’un client a besoin de ce manuel dans une langue autre que l’anglais, il
incombe au client de le faire traduire.
• Ne pas tenter d’intervenir sur les équipements tant que ce manuel d’installation et de
maintenance n’a pas été consulté et compris.
• Le non-respect de cet avertissement peut entraîner chez le technicien, l’opérateur ou le
patient des blessures dues à des dangers électriques, mécaniques ou autres.
WARNUNG
Diese Serviceanleitung existiert nur in englischer Sprache.
(DE)
• Falls ein fremder Kundendienst eine andere Sprache benötigt, ist es Aufgabe des Kunden
für eine entsprechende Übersetzung zu sorgen.
• Versuchen Sie nicht diese Anlage zu warten, ohne diese Serviceanleitung gelesen und
verstanden zu haben.
• Wird diese Warnung nicht beachtet, so kann es zu Verletzungen des
Kundendiensttechnikers, des Bedieners oder des Patienten durch Stromschläge,
mechanische oder sonstige Gefahren kommen.
ΠΡΟΕΙΔΟΠΟΙΗΣΗ
Το παρόν εγχειρίδιο σέρβις διατίθεται μόνο στα αγγλικά.
(EL)
• Εάν ο τεχνικός σέρβις ενός πελάτη απαιτεί το παρόν εγχειρίδιο σε γλώσσα εκτός των
αγγλικών, αποτελεί ευθύνη του πελάτη να παρέχει τις υπηρεσίες μετάφρασης.
• Μην επιχειρήσετε την εκτέλεση εργασιών σέρβις στον εξοπλισμό αν δεν έχετε
συμβουλευτεί και κατανοήσει το παρόν εγχειρίδιο σέρβις.
• Αν δεν προσέξετε την προειδοποίηση αυτή, ενδέχεται να προκληθεί τραυματισμός στον
τεχνικό σέρβις, στο χειριστή ή στον ασθενή από ηλεκτροπληξία, μηχανικούς ή άλλους
κινδύνους.
FIGYELMEZTETÉS
Ezen karbantartási kézikönyv kizárólag angol nyelven érhető el.
(HU)
• Ha a vevő szolgáltatója angoltól eltérő nyelvre tart igényt, akkor a vevő felelőssége a
fordítás elkészíttetése.
• Ne próbálja elkezdeni használni a berendezést, amíg a karbantartási kézikönyvben
leírtakat nem értelmezték.
• Ezen figyelmeztetés figyelmen kívül hagyása a szolgáltató, működtető vagy a beteg
áramütés, mechanikai vagy egyéb veszélyhelyzet miatti sérülését eredményezheti.
AÐVÖRUN
Þessi þjónustuhandbók er aðeins fáanleg á ensku.
(IS)
• Ef að þjónustuveitandi viðskiptamanns þarfnast annas tungumáls en ensku, er það
skylda viðskiptamanns að skaffa tungumálaþjónustu.
• Reynið ekki að afgreiða tækið nema að þessi þjónustuhandbók hefur verið skoðuð og
skilin.
• Brot á sinna þessari aðvörun getur leitt til meiðsla á þjónustuveitanda, stjórnanda eða
sjúklings frá raflosti, vélrænu eða öðrum áhættum.
AVVERTENZA
Il presente manuale di manutenzione è disponibile soltanto in lingua inglese.
(IT)
• Se un addetto alla manutenzione richiede il manuale in una lingua diversa, il cliente è
tenuto a provvedere direttamente alla traduzione.
• Procedere alla manutenzione dell’apparecchiatura solo dopo aver consultato il presente
manuale ed averne compreso il contenuto.
• Il mancato rispetto della presente avvertenza potrebbe causare lesioni all’addetto alla
manutenzione, all’operatore o ai pazienti provocate da scosse elettriche, urti meccanici
o altri rischi.
このサービスマニュアルには英語版しかありません。
(JA)
•
•
•
サービスを担当される業者が英語以外の言語を要求される場合、翻訳作業はその業
者の責任で行うものとさせていただきます。
このサービスマニュアルを熟読し理解せずに、装置のサービスを行わないでくださ
い。
この警告に従わない場合、サービスを担当される方、操作員あるいは患者 さんが、
感電や機械的又はその他の危険により負傷する可能性があります。
경고
본 서비스 매뉴얼은 영어로만 이용하실 수 있습니다.
(KO)
• 고객의 서비스 제공자가 영어 이외의 언어를 요구할 경우, 번역 서비스를 제공하는
것은 고객의 책임입니다.
• 본 서비스 매뉴얼을 참조하여 숙지하지 않은 이상 해당 장비를 수리하려고 시도하지
마십시오.
• 본 경고 사항에 유의하지 않으면 전기 쇼크, 기계적 위험, 또는 기타 위험으로 인해
서비스 제공자, 사용자 또는 환자에게 부상을 입힐 수 있습니다.
BRĪDINĀJUMS
Šī apkopes rokasgrāmata ir pieejama tikai angļu valodā.
(LV)
• Ja klienta apkopes sniedzējam nepieciešama informācija citā valodā, klienta pienākums
ir nodrošināt tulkojumu.
• Neveiciet aprīkojuma apkopi bez apkopes rokasgrāmatas izlasīšanas un saprašanas.
• Šī brīdinājuma neievērošanas rezultātā var rasties elektriskās strāvas trieciena,
mehānisku vai citu faktoru izraisītu traumu risks apkopes sniedzējam, operatoram vai
pacientam.
ĮSPĖJIMAS
Šis eksploatavimo vadovas yra tik anglų kalba.
(LT)
• Jei kliento paslaugų tiekėjas reikalauja vadovo kita kalba – ne anglų, suteikti vertimo
paslaugas privalo klientas.
• Nemėginkite atlikti įrangos techninės priežiūros, jei neperskaitėte ar nesupratote šio
eksploatavimo vadovo.
• Jei nepaisysite šio įspėjimo, galimi paslaugų tiekėjo, operatoriaus ar paciento sužalojimai
dėl elektros šoko, mechaninių ar kitų pavojų.
ADVARSEL
Denne servicehåndboken finnes bare på engelsk.
(NO)
• Hvis kundens serviceleverandør har bruk for et annet språk, er det kundens ansvar å
sørge for oversettelse.
• Ikke forsøk å reparere utstyret uten at denne servicehåndboken er lest og forstått.
• Manglende hensyn til denne advarselen kan føre til at serviceleverandøren, operatøren
eller pasienten skades på grunn av elektrisk støt, mekaniske eller andre farer.
OSTRZEŻENIE
Niniejszy podręcznik serwisowy dostępny jest jedynie w języku angielskim.
(PL)
• Jeśli serwisant klienta wymaga języka innego niż angielski, zapewnienie usługi
tłumaczenia jest obowiązkiem klienta.
• Nie próbować serwisować urządzenia bez zapoznania się z niniejszym podręcznikiem
serwisowym i zrozumienia go.
• Niezastosowanie się do tego ostrzeżenia może doprowadzić do obrażeń serwisanta,
operatora lub pacjenta w wyniku porażenia prądem elektrycznym, zagrożenia
mechanicznego bądź innego.
AVISO
Este manual de assistência técnica encontra-se disponível unicamente em inglês.
(PT-BR)
• Se outro serviço de assistência técnica solicitar a tradução deste manual, caberá ao
cliente fornecer os serviços de tradução.
• Não tente reparar o equipamento sem ter consultado e compreendido este manual de
assistência técnica.
• A não observância deste aviso pode ocasionar ferimentos no técnico, operador ou
paciente decorrentes de choques elétricos, mecânicos ou outros.
ATENÇÃO
Este manual de assistência técnica só se encontra disponível em inglês.
(PT-PT)
• Se qualquer outro serviço de assistência técnica solicitar este manual noutro idioma, é
da responsabilidade do cliente fornecer os serviços de tradução.
• Não tente reparar o equipamento sem ter consultado e compreendido este manual de
assistência técnica.
• O não cumprimento deste aviso pode colocar em perigo a segurança do técnico, do
operador ou do paciente devido a choques eléctricos, mecânicos ou outros.
ATENŢIE
Acest manual de service este disponibil doar în limba engleză.
(RO)
• Dacă un furnizor de servicii pentru clienţi necesită o altă limbă decât cea engleză, este
de datoria clientului să furnizeze o traducere.
• Nu încercaţi să reparaţi echipamentul decât ulterior consultării şi înţelegerii acestui
manual de service.
• Ignorarea acestui avertisment ar putea duce la rănirea depanatorului, operatorului sau
pacientului în urma pericolelor de electrocutare, mecanice sau de altă natură.
ОСТОРОЖНО!
(RU)
Данное руководство по техническому обслуживанию представлено только на
английском языке.
• Если сервисному персоналу клиента необходимо руководство не на английском, а на
каком-то другом языке, клиенту следует самостоятельно обеспечить перевод.
• Перед техническим обслуживанием оборудования обязательно обратитесь к
данному руководству и поймите изложенные в нем сведения.
• Несоблюдение требований данного предупреждения может привести к тому, что
специалист по техобслуживанию, оператор или пациент получит удар электрическим
током, механическую травму или другое повреждение.
UPOZORENJE
Ovo servisno uputstvo je dostupno samo na engleskom jeziku.
(SR)
• Ako klijentov serviser zahteva neki drugi jezik, klijent je dužan da obezbedi prevodilačke
usluge.
• Ne pokušavajte da opravite uređaj ako niste pročitali i razumeli ovo servisno uputstvo.
• Zanemarivanje ovog upozorenja može dovesti do povređivanja servisera, rukovaoca ili
pacijenta usled strujnog udara ili mehaničkih i drugih opasnosti.
UPOZORNENIE
Tento návod na obsluhu je k dispozícii len v angličtine.
(SK)
• Ak zákazníkov poskytovateľ služieb vyžaduje iný jazyk ako angličtinu, poskytnutie
prekladateľských služieb je zodpovednosťou zákazníka.
• Nepokúšajte sa o obsluhu zariadenia, kým si neprečítate návod na obluhu a
neporozumiete mu.
• Zanedbanie tohto upozornenia môže spôsobiť zranenie poskytovateľa služieb,
obsluhujúcej osoby alebo pacienta elektrickým prúdom, mechanické alebo iné
ohrozenie.
ATENCION
Este manual de servicio sólo existe en inglés.
(ES)
• Si el encargado de mantenimiento de un cliente necesita un idioma que no sea el inglés,
el cliente deberá encargarse de la traducción del manual.
• No se deberá dar servicio técnico al equipo, sin haber consultado y comprendido este
manual de servicio.
• La no observancia del presente aviso puede dar lugar a que el proveedor de servicios, el
operador o el paciente sufran lesiones provocadas por causas eléctricas, mecánicas o
de otra naturaleza.
VARNING
Den här servicehandboken finns bara tillgänglig på engelska.
(SV)
• Om en kunds servicetekniker har behov av ett annat språk än engelska, ansvarar
kunden för att tillhandahålla översättningstjänster.
• Försök inte utföra service på utrustningen om du inte har läst och förstår den här
servicehandboken.
• Om du inte tar hänsyn till den här varningen kan det resultera i skador på
serviceteknikern, operatören eller patienten till följd av elektriska stötar, mekaniska faror
eller andra faror.
OPOZORILO
Ta servisni priročnik je na voljo samo v angleškem jeziku.·
(SL)
• Če ponudnik storitve stranke potrebuje priročnik v drugem jeziku, mora stranka
zagotoviti prevod.·
• Ne poskušajte servisirati opreme, če tega priročnika niste v celoti prebrali in razumeli.·
• Če tega opozorila ne upoštevate, se lahko zaradi električnega udara, mehanskih ali
drugih nevarnosti poškoduje ponudnik storitev, operater ali bolnik.
DİKKAT
Bu servis kılavuzunun sadece ingilizcesi mevcuttur.
(TR)
• Eğer müşteri teknisyeni bu kılavuzu ingilizce dışında bir başka lisandan talep ederse,
bunu tercüme ettirmek müşteriye düşer.
• Servis kılavuzunu okuyup anlamadan ekipmanlara müdahale etmeyiniz.
• Bu uyarıya uyulmaması, elektrik, mekanik veya diğer tehlikelerden dolayı teknisyen,
operatör veya hastanın yaralanmasına yol açabilir.
Table of Contents
Compliance.........................................................................................................................................................................xviii
Components of the Certified Systems...................................................................................................................xviii
Component Description................................................................................................................................................xviii
Exceptions...........................................................................................................................................................................xviii
Monitor System EMC: Immunity Performance...................................................................................................xviii
About this Manual................................................................................................................... 1
Scope and Intended Users ..............................................................................................................................................1
Conventions............................................................................................................................................................................. 1
User Responsibility...............................................................................................................................................................1
References................................................................................................................................................................................ 2
Definitions of Terms.............................................................................................................................................................2
Symbols..................................................................................................................................................................................... 3
Important Safety Information............................................................................................. 5
Warnings, Cautions and Notes.......................................................................................................................................6
Electromagnetic Interference.........................................................................................................................................9
Chapter 1: System Description.......................................................................................... 11
1.1 System Overview........................................................................................................................................................ 11
1.2 Front Panel Controls, Indicators, and Connectors...................................................................................... 13
1.3 Display Description.................................................................................................................................................... 15
1.3.1 Primary Labor Parameters...................................................................................................................... 16
1.3.2 Additional Parameters .............................................................................................................................. 16
1.3.3 Waveform........................................................................................................................................................ 16
1.3.4 Time.................................................................................................................................................................... 16
1.3.5 Softkeys............................................................................................................................................................ 16
1.4 Rear Panel Descriptions.......................................................................................................................................... 19
1.5 Peripherals Description............................................................................................................................................ 21
1.5.1 CorometricsTM 340 Telemetry and Mini Telemetry ...................................................................... 21
1.5.2 Quantitative Sentinel/Perinatal System............................................................................................ 22
1.5.3 Exergen® TAT-5000TM...............................................................................................................................................................22
© 2013 by General Electric Company. All rights reserved.
2036947-001xiii
Table of Contents
1.5.4 DINAMAP® Models PRO Series 100-400 and ProCare................................................................ 22
1.6 Theory of Operation ................................................................................................................................................. 23
1.6.1 Digital System Processor (DSP) / Display Board............................................................................ 23
1.6.2 Main Board...................................................................................................................................................... 25
1.6.3 User-Interface Keypad & Volume/Alarm Keypad Boards......................................................... 26
1.6.4 Video Decoder Board................................................................................................................................. 26
1.6.5 Recorder Board............................................................................................................................................. 26
1.6.6 Communications Board............................................................................................................................ 26
1.6.7 MSpO2 Connector Board.......................................................................................................................... 26
1.6.8 MSpO2 Carrier Board.................................................................................................................................. 27
1.6.9 FECG/UA Board............................................................................................................................................. 27
1.6.10 MECG Board................................................................................................................................................. 27
1.6.11 Dual Ultrasound Board........................................................................................................................... 27
1.6.12 Isolated Power Supply Board............................................................................................................... 28
1.6.13 Front-End Motherboard.......................................................................................................................... 28
1.6.14 Memory Battery......................................................................................................................................... 28
Chapter 2: Installation......................................................................................................... 29
2.1 Time Required for Installation............................................................................................................................... 29
2.2 Environmental Requirements............................................................................................................................... 29
2.3 Tool Requirements..................................................................................................................................................... 29
2.4 Installation Procedure.............................................................................................................................................. 29
2.4.1 Strip Chart Recorder Paper Load.......................................................................................................... 29
2.4.2 Peripheral Connections............................................................................................................................. 31
2.4.3 Power Cord Attachment........................................................................................................................... 31
2.4.4 System Configuration................................................................................................................................ 31
Chapter 3: Maintenance and Checkout........................................................................... 35
3.1 Procedures Schedule................................................................................................................................................ 35
3.1.1 Environmental Requirements................................................................................................................. 36
3.2 Tool Requirements..................................................................................................................................................... 36
3.3 Maintenance and Checkout Procedures......................................................................................................... 36
3.3.1 Visual Inspection.......................................................................................................................................... 36
3.3.2 Cleaning (Thermal Print Head)............................................................................................................... 37
3.3.3 Transducer Checks...................................................................................................................................... 37
3.3.4 Functional Checks........................................................................................................................................ 38
3.3.5 Pattern Memory Check.............................................................................................................................. 49
3.3.6 NIBP Calibration Check.............................................................................................................................. 52
3.3.7 Electrical Safety Tests................................................................................................................................ 52
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Chapter 4: Calibration.......................................................................................................... 55
4.1 Calibration Schedule................................................................................................................................................. 55
4.2 Environmental Requirements............................................................................................................................... 56
4.3 Tool Requirements..................................................................................................................................................... 56
4.4 Calibration Procedures............................................................................................................................................ 56
4.4.1 NIBP Calibration Check.............................................................................................................................. 56
4.4.2 Recorder Photosensors Check............................................................................................................... 59
4.4.3 Recorder Calibration (offsets) Check................................................................................................... 61
Chapter 5: Diagnostics and Troubleshooting.................................................................. 63
5.1 General Troubleshooting Table............................................................................................................................ 63
5.2 Ultrasound Troubleshooting Table..................................................................................................................... 67
5.3 FECG Troubleshooting Table................................................................................................................................. 69
5.4 External Uterine Activity Troubleshooting Table......................................................................................... 70
5.5 Internal Uterine Activity Troubleshooting Table.......................................................................................... 72
5.6 MECG Troubleshooting Table................................................................................................................................ 73
5.7 Blood Pressure Troubleshooting Table............................................................................................................. 73
5.8 Maternal Pulse Oximetry Troubleshooting Table........................................................................................ 75
5.9 Main Board Troubleshooting – Voltage Checks........................................................................................... 76
5.10 FECG/UA Board Troubleshooting – Voltage Adjustments..................................................................... 77
5.11 Recorder Troubleshooting................................................................................................................................... 77
5.11.1 Vertical Offset Adjustment.................................................................................................................... 77
5.11.2 Horizontal Offset Adjustment............................................................................................................... 79
5.11.3 Light Printing................................................................................................................................................ 80
Chapter 6: Repair and Replacement Procedures............................................................ 85
6.1 Top Cover, Top Cover Gasket, and Timekeeping RAM Chip Replacement....................................... 86
6.2 Speaker Replacement.............................................................................................................................................. 87
6.3 DSP/Display Board Replacement....................................................................................................................... 88
6.4 Communication Board Replacement................................................................................................................ 89
6.5 Pneumatics Assembly Replacement................................................................................................................. 90
6.6 Main Board Replacement....................................................................................................................................... 92
6.7 Display Assembly Replacement.......................................................................................................................... 93
6.8 Power Switch Assembly Replacement............................................................................................................. 95
6.9 Trim Knob Control Assembly Replacement................................................................................................... 96
6.10 Keypads Replacement.......................................................................................................................................... 97
6.11 Main Power Supply / Fan Replacement........................................................................................................ 99
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2036947-001xv
Table of Contents
6.12 Dual Ultrasound Board Replacement..........................................................................................................101
6.13 FECG/UA Board and MECG Board Replacement.....................................................................................102
6.14 SpO Carrier Board (with Nellcor/Masimo SpO Module) Replacement.....................................103
2
2
6.15 Isolated Power Supply Board Replacement..............................................................................................104
6.16 Front-end Motherboard Replacement.........................................................................................................105
6.17 Recorder Assembly and Recorder Door Button Replacement.........................................................107
6.18 Recorder Board Replacement..........................................................................................................................109
6.19 Recorder Stepper Motor Replacement........................................................................................................110
6.20 Recorder Paper-Out/Paper-Low Photosensor Replacement............................................................111
6.21 Recorder Paper-Loading Photosensor Replacement...........................................................................113
6.22 Recorder Thermal Print Head Replacement.............................................................................................114
6.23 Front Bezel Replacement...................................................................................................................................115
Chapter 7: Service Parts.................................................................................................... 117
7.1 Illustrated Parts.........................................................................................................................................................118
7.2 Labels.............................................................................................................................................................................123
7.3 Power Cords................................................................................................................................................................124
7.4 FRU List..........................................................................................................................................................................125
Appendix A: Technical Specifications.............................................................................. 131
A.1 General Product Specifications.........................................................................................................................132
A.2 Strip Chart Recorder Specifications.................................................................................................................133
A.3 Operating Modes Specifications.......................................................................................................................134
Appendix B: Alarm Summary ........................................................................................... 141
Appendix C: Electromagnetic Compatibility................................................................. 143
C.1 Manufacturer’s Guidance and Declaration – Electromagnetic Emissions....................................143
C.2 Manufacturer’s Guidance and Declaration – Electromagnetic Immunity....................................144
C.3 Recommended Separation Distances............................................................................................................146
C.4 Compliant Cables and Accessories..................................................................................................................146
Appendix D: PS320 Fetal Simulator Setup...................................................................... 149
D.1 Parts Required...........................................................................................................................................................149
D.2 PS320 Fetal Simulator Setup..............................................................................................................................150
Appendix E: Service Mode Screens................................................................................... 153
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Table of Contents
E.1 Service Lock Screen.................................................................................................................................................154
E.2 Install Options Screens...........................................................................................................................................155
E.3 Printing Setup Information...................................................................................................................................159
E.4 Communications Setup Screen..........................................................................................................................159
E.5 Error Log Screen........................................................................................................................................................160
E.6 Diagnostic Control Screen....................................................................................................................................161
E.7 J102 Screen.................................................................................................................................................................162
E.8 NIBP Calibration Screen.........................................................................................................................................163
E.9 Setup Screen Defaults............................................................................................................................................163
E.9.1 Operator Setup Screens..........................................................................................................................164
E.9.2 Service Mode Screens..............................................................................................................................167
Appendix F: CPU Software Upgrade................................................................................. 169
F.1 Tool Requirement......................................................................................................................................................169
F.2 Upgrade Procedure..................................................................................................................................................169
Appendix G: CorometricsTM 325 Simulator Setup and Use........................................... 171
G.1 Simulator Setup........................................................................................................................................................171
G.2 Alarms Check.............................................................................................................................................................171
G.3 MECG Input Check...................................................................................................................................................174
G.4 FECG Input Check....................................................................................................................................................175
G.5 Ultrasound Input Check........................................................................................................................................177
G.6 Uterine Activity Check...........................................................................................................................................178
G.7 Pattern Memory Check.........................................................................................................................................179
G.8 Dual Heart Rate Check (Non-Pattern, FECG/US Modes)........................................................................180
G.9 Dual Heart Rate Check (Non-Pattern, Dual US Modes)..........................................................................181
G.10 Fetal Movement Detection Check.................................................................................................................182
© 2013 by General Electric Company. All rights reserved.
2036947-001xvii
Compliance
A GE brand Corometrics™ 250cx Series Monitor bears CE mark CE-0459 indicating its conformity with the
provisions of the Council Directive 93/42/EEC concerning medical devices and fulfills the essential requirements
of Annex I of this directive.
The device is manufactured in India; the CE mark is applied under the authority of Notified Body GMED (0459).
The country of manufacture and appropriate Notified Body can be found on the equipment labeling.
The product complies with the requirements of standard EN 60601-1-2 “Electromagnetic Compatibility—
Medical Electrical Equipment” and standard EN 60601-1 “General Requirements for Safety.”
Components of the Certified Systems
The IEC electromagnetic compatibility (EN) standards require individual equipment (components and
accessories) to be configured as a system for evaluation. For systems that include a number of different
equipment that perform a number of functions, one of each type of equipment shall be included in the
evaluation.
The equipment listed below is representative of all possible combinations. For individual equipment
certification, refer to the appropriate declarations of conformity.
Component Description
•
•
•
•
•
•
•
•
•
•
•
•
•
•
250cx Series Maternal/Fetal Monitor
Model 146 Fetal Acoustic Stimulator
Intrauterine Pressure Transducer
FECG Cable/Legplate
Ultrasound Transducers (x2)
Blood Pressure Hose and Cuff
MSpO2 Interconnect Cable and Sensor
MECG Cable
FECG/MECG Adapter Cable
Remote Event Marker
RS-232C Interconnect Cables (x3)
Central Nurses Station Interconnect Cable
Model 2116B Keyboard and Interconnect Cable
Model 1563AAO Telemetry Cable
• Exergen® TAT-5000™
• External 15” display
Exceptions
None
Monitor System EMC: Immunity Performance
Be aware that adding accessories or components, or modifying the medical device or system may degrade the
EMI performance. Consult with qualified personnel regarding changes to the system configuration.
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About this Manual
Scope and Intended Users
This service manual describes the installation, maintenance, checkout, calibration and repair of the
CorometricsTM 250cx Series monitor. The intended users for this service manual are biomedical engineering
service providers of the hospitals and GE service personnel.
Conventions
WARNING:
A WARNING statement is used when the possibility of injury to the patient or the operator
exists.
CAUTION:
A CAUTION statement is used when the possibility of damage to the equipment exists.
SENSITIVE TO ELECTROSTATIC DISCHARGE CAUTION
An electrostatic discharge (ESD) Susceptibility symbol is displayed to alert service personnel
that the part(s) are sensitive to electrostatic discharge and that static control procedures must
be used to prevent damage to the equipment.
User Responsibility
This Product will perform in conformity with the description thereof contained in this manual and
accompanying labels and/or inserts, when assembled, operated, maintained and repaired in accordance
with the instructions provided. This Product must be checked periodically. A defective Product should not be
used. Parts that are broken, missing, plainly worn, distorted or contaminated should be replaced immediately.
Should such repair or replacement become necessary, GE Healthcare recommends that a telephone or
written request for service advice be made to the nearest GE Healthcare Regional Service Center. This Product
or any of its parts should not be repaired other than in accordance with written instructions provided by GE
Healthcare and by GE Healthcare trained personnel. The Product must not be altered without GE Healthcare’s
prior written approval. The user of this Product shall have the sole responsibility for any malfunction that
results from improper use, faulty maintenance, improper repair, damage or alteration by anyone other than GE
Healthcare.
This Product is intended for use by clinical professionals who are expected to know the medical procedures,
practices, and terminology required to monitor obstetrical patients. This manual documents all possible
parameters available in the CorometricsTM 250cx Series monitor. It is the responsibility of each hospital to
ensure that the Labor and Delivery staff is trained in all aspects of the selected model. The CorometricsTM 250cx
Series monitor is designed to assist the perinatal staff by providing information regarding the clinical status of
the mother and fetus during labor. The monitor does not replace observation and evaluation of the mother and
fetus at regular intervals, by a qualified care provider, who will make diagnoses and decide on treatments or
© 2013 by General Electric Company. All rights reserved.
2036947-0011
About this Manual
interventions. Visual assessment of the monitor display and strip chart must be combined with knowledge of
patient history and risk factors to properly care for the mother and fetus.
WARNING:
This device shall not be repaired other than in accordance with written instructions provided
by GE Healthcare and by GE Healthcare trained personnel.
CAUTION:
Untied States federal law restricts this device to sale by or on the order of a licensed medical
practitioner.
References
The following table lists other manuals pertaining to the CorometricsTM 250cx Series monitor service manual:
References
CorometricsTM 250cx Series Monitor Operator’s Manual (English)
CorometricsTM Model 340 Service Manual
Mini Telemetry System Service Manual
Orderable Part Number
2036946-001
2006920-001
2049821-001
Visit www.flukebiomedical.com
Fluke® PS320 Fetal Simulator User’s Manual
Maternal/Fetal Monitoring Clinical Application Operator’s Manual 15457AA
CorometricsTM Fetal Acoustic Stimulator Operator’s Manual
1168AA
Definitions of Terms
Term
BPM
ECG
ESD
FECG
FHR
FAST
FMD
HBC
INOP
IUPC
LCD
MECG
NIBP
REM
SpO2
TOCO
2
Definition
Beat Per Minute
Electrocardiogram
Electro Static Discharge
Fetal Electrocardiogram
Fetal Heart Rate
Fetal Acoustic Stimulation Test
Fetal Movement Detection
Heart Beat Coincidence
Inoperable
Intra-Uterine Pressure Catheter
Liquid Crystal Display
Maternal Electrocardiogram
Non-Invasive Blood Pressure
Remote Event Marker
Pulse Oximeter Oxygen Saturation
Non-invasive method of measuring uterine activity
2036947-001
© 2013 by General Electric Company. All rights reserved.
About this Manual
Term
UA
US
Definition
Uterine Activity
Ultrasound
Symbols
This section identifies the symbols that are displayed on the CorometricsTM 250cx Series monitor:
Equipment Symbols
TYPE BF EQUIPMENT: Type BF equipment is suitable for intentional external and internal
application to the patient, excluding direct cardiac application. Type BF equipment has an
F-type applied part.
DEFIBRILLATOR-PROOF TYPE BF EQUIPMENT: Type BF equipment is suitable for intentional
external and internal application to the patient, excluding direct cardiac application. Type BF
equipment is type B equipment with an F-type isolated (floating) part. The paddles indicate
the equipment is defibrillator proof.
TYPE CF EQUIPMENT: Type CF equipment is suitable for intentional external and internal
application to the patient, including direct cardiac application. Type CF equipment has an
F-type applied part.
DEFIBRILLATOR-PROOF TYPE CF EQUIPMENT: Type CF equipment is suitable for intentional
external and internal application to the patient including direct cardiac application. Type CF
equipment is F-type applied part that provides a higher degree of protection against electric
shock than that provided by Type BF applied parts.
Consult accompanying documents.
Alternating Current (AC)
Ground Equalization Potential Post
POWER OFF: disconnection from the mains
POWER ON: connection to the mains
European Union Representative
Catalog Number
Serial Number
Manufacturer
© 2013 by General Electric Company. All rights reserved.
2036947-0013
About this Manual
Equipment Symbols
practitioner.
disposed as unsorted municipal waste and must be collected separately. Please contact the
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2036947-001
© 2013 by General Electric Company. All rights reserved.
Important Safety Information
The service information is important for the safety of both the patient and operator and also serves to enhance
equipment reliability.
WARNING:
Before servicing the CorometricsTM 250cx Series monitor, read through this entire manual. As with all
medical equipment, attempting to use this device without a thorough understanding of its operation
may result in patient or user injury. This device should be serviced only by authorized service
personnel. Additional precautions specific to certain procedures are found in the text of this manual.
The information contained in this service manual pertains only to those models of products which are
marketed by GE Healthcare as of the effective date of this manual or the latest revision thereof. This service
manual was prepared for exclusive use by GE Healthcare service personnel in light of their training and
experience as well as the availability to them of parts, proper tools, and test equipment. Consequently, GE
Healthcare provides this service manual to its customers purely as a business convenience and for the
customer’s general information only without warranty of the results with respect to any application of such
information.
Furthermore, because of the wide variety of circumstances under which maintenance and repair activities
may be performed and the unique nature of each individual’s own experience, capacity, and qualifications,
the fact that a customer has received such information from GE Healthcare does not imply in any way that
GE Healthcare deems said individual to be qualified to perform any such maintenance or repair service.
Moreover, it should not be assumed that every acceptable test and safety procedure or method, precaution,
tool, equipment, or device is referred to within, or that abnormal or unusual circumstances may not warrant or
suggest different or additional procedures or requirements. This manual is subject to periodic review, update,
and revision. Customers are cautioned to obtain and consult the latest revision before undertaking any service
of the equipment.
WARNING:
The user or service staff should dispose of all the waste properly as per federal, state, and local
waste disposal regulations. Improper disposal could result in personal injury and environmental
impact
Do not use malfunctioning equipment. If the system is under warranty, contact GE technical support at the
number on the back of the manual PRIOR to performing any repairs on the system.
© 2013 by General Electric Company. All rights reserved.
2036947-0015
Important Saftey Information
Warnings, Cautions and Notes
WARNING:
ACCIDENTAL SPILLS: In the event that fluids are accidentally spilled on the monitor, take the monitor
out of operation and inspect for damage.
WARNING:
APPLICATION: This monitor is not designed for direct cardiac connection.
WARNING:
CONDUCTIVE CONNECTIONS: Avoid making any conductive connections to applied parts (patient
connection) which are likely to degrade safety.
WARNING:
CONDUCTIVE PARTS: Ensure that the conductive parts of the lead electrodes and associated
connectors do not contact other conductive parts including earth.
WARNING:
CONNECTIONS: The correct way to connect a patient to the monitor is to plug the electrode leads
into the patient cable which in turn connects to the monitor. The monitor is connected to the wall
socket by the power cord. Do not plug the electrode leads into the power cord, a wall socket, or an
extension cord.
WARNING:
DEFIBRILLATION: During defibrillation, all personnel must avoid contact with the patient and monitor
to avoid a dangerous shock hazard. In addition, proper placement of the paddles in relation to the
electrodes is required to minimize harm to the patient.
WARNING:
DEFIBRILLATION PROTECTION: When used with the GE-recommended accessories, the monitor is
protected against the effects of defibrillator discharge. If monitoring is disrupted by the defibrillation,
the monitor will recover.
WARNING:
ELECTRICAL SHOCK: To avoid electrical shock hazard, do not operate the monitor with the top cover
removed.
WARNING:
ELECTROMAGNETIC INTERFERENCE: Strong electromagnetic fields may interfere with monitor
operation. Interference prevents the clear reception of signals by the monitor. If the hospital is close
to a strong transmitter such as TV, AM or FM radio, police or fire stations, a HAM radio operator, an
airport, or cellular phone, their signals could be picked up as monitor signals. If you feel interference
is affecting the monitor, contact your service representative to check the monitor in your
environment. Refer to Electromagnetic Interference section for additional information.
WARNING:
ELECTROSURGERY: The monitor is not designed for use with high-frequency surgical devices. In
addition, measurements may be affected in the presence of strong electromagnetic sources such as
electrosurgery equipment.
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2036947-001
© 2013 by General Electric Company. All rights reserved.
Important Saftey Information
WARNING:
EXPLOSION HAZARD: Do not use this equipment in the presence of flammable anesthetics or inside
an oxygen tent.
WARNING:
GROUNDING: To avoid electrical shock hazard to the patient or the operator, do not defeat the
three-wire grounding feature of the power cord by means of adaptors, plug modifications, or other
methods.
WARNING:
INOPERABLE MECG: The MECG trace is not visible during a LEADS OFF condition or an overload
(saturation) of the frontend amplifier during differential input voltage of more than ±300mV.
WARNING:
INSTRUCTIONS: For continued and safe use of this equipment, it is necessary to follow all listed
instructions. However, the instructions provided in this manual in no way supersede established
medical procedures concerning patient care. The monitor does not replace observation and
evaluation of the patient, at regular intervals, by a qualified care provider who will make diagnoses
and decide on treatments and interventions
WARNING:
INTERFACING OTHER EQUIPMENT: Monitoring equipment must be interfaced with other types
of medical equipment by qualified biomedical engineering personnel. Consult manufacturers’
specifications to maintain safe operation.
WARNING:
LEAKAGE CURRENT TEST: The interconnection of auxiliary equipment with this device may increase
the total leakage current. When interfacing with other equipment, a test for leakage current
must be performed by qualified biomedical engineering personnel before using with patients.
Serious injury or death could result if the leakage current exceeds applicable standards. The use
of accessory equipment not complying with the equivalent safety requirements of this equipment
may lead to a reduced level of safety of the resulting system. Consideration relating to the choice
shall include: use of the accessory in the patient vicinity; and evidence that the safety certification
of the accessory has been performed in accordance with the appropriate EN60601.1 harmonized
national standard.
WARNING:
LINE ISOLATION MONITOR TRANSIENTS: Line isolation monitor transients may resemble actual
cardiac waveforms, and thus cause incorrect heart rate determinations and alarm activation (or
inhibition).
WARNING:
MRI USE: Do not use the electrodes during MRI scanning. Conducted current could potentially cause
burns.
WARNING:
PATIENT CABLES AND LEADWIRES: Do not use patient cables and electrode leads that permit direct
connection to electrical sources. Use only “safety” cables and leadwires. Use of non-safety patient
cables and leadwires creates risk of inappropriate electrical connection which may cause patient
shock or death.
© 2013 by General Electric Company. All rights reserved.
2036947-0017
Important Saftey Information
WARNING:
PACEMAKER PATIENTS: Rate meters may continue to count the pacemaker rate during occurrences
of cardiac arrest or some arrhythmias. Do not rely entirely upon rate meter alarms. Keep
pacemaker patients under close surveillance. For disclosure of the pacemaker pulse rejection
capability of the monitor, refer to Appendix A.
WARNING:
RF INTERFACE: Known RF sources, such as cell phones, radio or TV stations, and two-way radios,
may cause unexpected or adverse operation of this device.
WARNING:
SIMULTANEOUS DEVICES: Do not simultaneously connect more than one device that uses electrodes
to detect ECG and/or respiration to the same patient. Use of more than one device in this manner
may cause improper operation of one or more of the devices.
WARNING:
STRANGULATION: Make sure all patient cables, leadwires, and tubing are positioned away from the
patient’s head to minimize the risk of accidental strangulation.
WARNING:
WATER BIRTHS: Do not use the monitor to directly monitor patients during water births, in whirlpool
or submersion water baths, during showers, or in any other situation where the mother is immersed
in water. Doing so may result in electrical shock hazard.
WARNING:
EXTERNAL VGA CONNECTIONS: Connect only to GE-recommended display. ONLY remove cover plate
if external display is used.
WARNING:
TELEMETRY CONNECTIONS: Connect only to GE-recommended telemetry system. Contact your GE
service representative for more information.
WARNING:
COLOR DISPLAY: Certain colors may have limited visibility at a distance. Color-blind individuals may
experience this more often.
WARNING:
EXERGEN® TAT-5000™: Cable assembly 2036641-001, 2036641-002, 2036641-003, and 2036641004 cannot be field serviced. Do NOT attempt any repairs to this assembly. This assembly must be
returned to the factory for any repairs. This assembly, as shipped, is important to patient safety.
WARNING:
DISPOSAL: This product consists of devices that may contain mercury, which must be recycled or
disposed of in accordance with local, state, or country laws. (Within this system, the backlight lamps
in the monitor contain mercury).
CAUTION:
ANNUAL SERVICING: For continued safety and performance of the monitor, verify the calibration,
accuracy, and electrical safety of the monitor annually. Contact your GE service representative.
8
2036947-001
© 2013 by General Electric Company. All rights reserved.
Important Saftey Information
CAUTION:
DAILY TESTING: It is essential that the monitor and accessories be inspected every day. It is
recommended practice to initiate the monitor’s selftest feature at the beginning of each monitoring
session.
CAUTION:
ENVIRONMENT: The performance of the monitor has not been tested in certain areas, such as x-ray
and imaging suites. The monitor is not recommended for use in these environments.
CAUTION:
EQUIPMENT CONFIGURATION: The equipment or system should not be used adjacent to, or stacked
with, other equipment. If adjacent or stacked use is necessary, the equipment or system should be
tested to verify normal operation in the configuration in which it is being used.
CAUTION:
PERFORMANCE: Report all problems experienced with the monitor. If the monitor is not working
properly, contact your service representative for service. The monitor should not be used if it is not
working properly.
CAUTION:
PINCHING: Keep fingers clear of the paper roller because the roller could pinch your fingers.
CAUTION:
STATIC ELECTRICITY: This assembly is extremely static sensitive and should be handled using
electrostatic discharge precautions.
CAUTION:
TRAPPING: Keep hands, hair, jewelry, and loose clothing away from the paper roller because the
roller could trap these items.
CAUTION:
TRIPPING: Arrange monitoring equipment so that cords and cables do not present a tripping hazard.
Electromagnetic Interference
This device has been tested and found to comply with the limits for medical devices to the IEC 60601-1-2:
2007, EN60601-1-2:2007, Medical Device Directive 93/42/EEC. These limits are designed to provide reasonable
protection against harmful interference in a typical medical installation.
However, because of the proliferation of radio-frequency transmitting equipment and other sources of
electrical noise in the health-care and home environments (for example, cellular phones, mobile two-way
radios, electrical appliances), it is possible that high levels of such interference due to close proximity or
strength of a source, may result in disruption of performance of this device.
Refer to the Electromagnetic Immunity information in this product’s service manual for EN 60601-1-2 (2007)
Edition 3 compliance information and safety information for this product.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with these instructions, may cause harmful interference with other devices in the vicinity.
Disruption or interference may be evidenced in the form of erratic readings, cessation of operation, or incorrect
© 2013 by General Electric Company. All rights reserved.
2036947-0019
Important Saftey Information
functioning. If this occurs, the site of use should be surveyed to determine the source of this disruption, and
actions taken to eliminate the source.
The user is encouraged to try to correct the interference by one or more of the following measures:
•
•
•
•
10
Turn equipment in the vicinity off and on to isolate the offending equipment.
Reorient or relocate the other receiving device.
Increase the separation between the interfering equipment and this equipment.
If assistance is required, contact your GE service representative.
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 1: System Description
1.1 System Overview
The CorometricsTM 250cx Series monitor is a medical device for monitoring maternal/fetal parameters (Fetal
Heart Rate, Uterine Activity, Maternal Non-Invasive Blood Pressure, Maternal Pulse Oximetry, and Maternal/
Fetal ECG) in labor and delivery (antepartum, intrapartum, and postpartum care). The monitor is equipped
with an LCD display, which provides simultaneous display of fetal and maternal parameters plus the maternal
waveforms, and a recorder, which prints continuous trends and alphanumeric data on one strip chart. The
system is compatible with Centricity® Perinatal Clinical Information Systems and other information systems to
streamline capture and archiving of patient data.
The CorometricsTM 250cx Series monitors are offered in two models:
1. Maternal/Fetal monitor (CorometricsTM 259cx): This model supports two Fetal Heart Rate (FHR) channels,
Uterine Activity (TOCO or IUP), Maternal Non-Invasive Blood Pressure (NIBP), Maternal Pulse Oximetry
(MSpO2), Fetal ECG (FECG), and Maternal ECG (MECG).
2. Fetal monitor (CorometricsTM 256cx): This model supports two Fetal Heart Rate (FHR) channels, Uterine
Activity (TOCO or IUP), and Fetal ECG (FECG).
Table 1-1: Monitor Models and Features
Monitor Model
Features
Maternal/Fetal monitor (Corometrics 259cx)
TM
Fetal Only monitor (Corometrics 256cx)
TM
US, US2, TOCO, IUP, FECG, MECG, NIBP, MSpO2
US, US2, TOCO, IUP, FECG
Below optional components are also available to order:
A. Software Upgrade CD: The CD can be purchased to upgrade the monitor software to the latest version
using the RS-232 serial port of the monitor.
B. Spectra Alerts option: Each monitor unit can be upgraded to include Spectra Alerts option. This feature
analyzes heart rate and uterine activity data to detect certain abnormal trends and alert the clinician.
C. Fetal Movement Detection option: Each monitor unit can be software upgraded to include the Fetal
Movement Detection (FMD) software option. This feature is designed to detect gross fetal body
movements and body movements with associated limb movement.
© 2013 by General Electric Company. All rights reserved.
2036947-00111
Chapter 1: System Description
Each monitor unit has its unique 13-Digit product serial number which contains embedded information about
the unit manufacturing date and site (See Figure 1-1).
Product Code
SDJ
SDK
SDL
SDM
SDR
Description
259CX-A (Nellcor, India Build)
259CX-B (Nellcor, US Build)
259CX-C (Masimo, India Build)
259CX-D (Masimo, US Build)
259CX-X (India Build)
Figure 1-1 Global Serial Number Format (13-Digit)
NOTE: For the refurbished (Gold Seal) CorometricsTM 259cx units, the unit serial number ends with letter “R” and
the the serial number label of the unit includes the text “259CX REMANUFACTURED”.
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© 2013 by General Electric Company. All rights reserved.
Chapter 1: System Description
1.2 Front Panel Controls, Indicators, and Connectors
Figure 1-2 Front Panel View
A. Display: The monitor display is divided into several sections. The content and layout of the display can
change, depending on which functions are installed in the monitor and the modes of operation in use.
B. Trim Knob Control: Operation of the monitor is controlled by using the front panel buttons in
conjunction with the Trim Knob Control. This control selects softkeys on the display and positions a
cursor within a setup screen. Rotate the Trim Knob Control left or right to highlight items on the screen
with a bar cursor. After highlighting the desired item, press the Trim Knob Control to make the selection.
In summary, rotate to move cursor and press to select an item.
C. NIBP Start/Stop Button: This button starts and stops both manual and automatic blood pressure
determinations. Pressing and holding this button provides a “shortcut” for changing the interval time of
the NIBP cycle in the automatic mode.
D. Test Button: Pressing this button starts or stops a monitor self-test routine.
E. Mark [Offset] Button: The Mark [Offset] button is a multi-function button:
• Mark: Pressing this button prints an event mark ( ) on the bottom two lines of the top grid on the
strip chart paper.
• Offset: When the Heart Rate Offset mode is enabled, pressing and holding this button shifts the
secondary FHR trend +20 bpm for visibility purposes.
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F. UA Reference Button: This button sets a baseline for uterine activity pressure monitoring.
G. Paper Advance Button: Pressing this button advances the strip chart paper at a rate of 40 cm/min for
as long as the button is held down.
H. Record Button: This button selects one of three recorder states: on, maternal-only mode, or off.
I. Power Indicator: This LED indicator illuminates in green when the monitor is turned on.
J. Recorder Indicator: This LED indicator shows the status of the recorder as per below table:
Recorder Indicator Status
What It Means
On
Recorder is on.
Off
Recorder is off.
Three short flashes every 5 seconds
Recorder is in maternal-only mode.
Flashes on and off
Error condition
K. Light Button: This button illuminates the strip chart paper for better visibility.
L. Record Door Latch: This latch opens the strip chart recorder door for adding, removing, or adjusting
the paper.
M. Power Switch: Moving this switch to the ON position (I) turns on the monitor; moving the switch to the
OFF position (O) turns off the monitor.
N. Strip Chart Recorder: The recorder prints annotations and trends on the strip chart paper. Two paper
styles are available.
O. Maternal NIBP Connector: This connector is for attaching the blood pressure cuff.
P. Maternal SpO2 Connector: Connect a 250cx Series MSpO2 intermediate cable to this connector. Use
only Nellcor Maternal Oxygen Saturation Sensors if Nellcor technology is installed in your monitor, or
Masimo Sensors if Masimo technology is installed in your monitor.
Q. FECG/MECG Connector: Connect an FECG cable/legplate or MECG cable plug to this connector. Cables
with rectangular plugs connect directly to the FECG/MECG connector. Cables with round plugs require
an FECG/MECG adapter. This adapter is used for dual ECG monitoring too. The adapter branches into
two cables, each with a round connector at the end: one branch is labeled MECG; the other branch is
labeled FECG.
R. UA Connector: Connect a TOCO transducer or IUPC to this connector.
S. US2 Connector: Connect the secondary ultrasound transducer plug to this connector.
T. US Connector: Connect the primary ultrasound transducer plug to this connector.
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U. Volume Button (FHR2 Decrease): This button is used to decrease the fetal heart rate (FHR2) sound
volume of the second ultrasound channel (US2). Volume settings have no effect on the processing used
to determine heart rate. The Volume buttons work in conjunction with the volume control settings on
the US/US2 Setup screen and on the FECG Setup screen.
V. Volume Button (FHR2 Increase): This button is used to increase the fetal heart rate (FHR2) sound
volume of the second ultrasound channel (US2). Volume settings have no effect on the processing used
to determine heart rate. The Volume buttons work in conjunction with the volume control settings on
the US/US2 Setup screen and on the FECG Setup screen.
W. Volume Button (FHR1 Decrease): This button is used to decrease the fetal heart rate (FHR1) sound
volume of the primary ultrasound channel (US). Volume settings have no effect on the processing used
to determine heart rate. The Volume buttons work in conjunction with the volume control settings on
the US/US2 Setup screen and on the FECG Setup screen.
X. Volume Button (FHR1 Increase): This button is used to increase the fetal heart rate (FHR1) sound
volume of the primary ultrasound channel (US). Volume settings have no effect on the processing used
to determine heart rate. The Volume buttons work in conjunction with the volume control settings on
the US/US2 Setup screen and on the FECG Setup screen.
Y. Alarm Silence Button: Pressing this button silences the audible indication of an individual alarm.
1.3 Display Description
Display Example: The graphic in Figure
1-3 gives the following information:
•Blood pressure (NIBP) is not active
as indicated by the absence of
numerics.
•Maternal pulse oximetry (MSpO2)
is active by presence of pulse
amplitude indicator.
•MECG is selected as the heart rate
source as indicated by the MECG
mode title softkey—rather than
Pulse.
•The MECG waveform is displayed at
25 mm/sec, at a size of 2x, with lead
II selected
•Heartbeat coincidence is enabled
as indicated by the HBC acronym in
the primary labor parameters area.
•All alarms are enabled as indicated
by  symbol.
Figure 1-3 Display Information Example
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The monitor LCD display is designed to show the information listed below:
1.3.1 Primary Labor Parameters
These parameters, shown on the upper portion of the screen (See Figure 1-3), include Fetal Heart Rate 1 (FHR1),
Fetal Heart Rate 2 (FHR2), and Uterine Activity (UA). Each parameter can have several modes depending on the
type of its input.
Parameter
Parameter Mode
Fetal Heart Rate 1 (FHR1)
US, US2, FECG, or INOP
Fetal Heart Rate 2 (FHR2)
US, US2, or INOP
Uterine Activity (UA)
TOCO, IUP, or INOP
For FHR1 and FHR2 parameters, the FHR value is shown in beats per minute and the FHR mode is displayed
above the FHR value. For UA parameter, the UA value is shown in a user-selectable unit (mmHg or kPa) and the
UA mode is displayed above the UA value.
1.3.2 Additional Parameters
These parameters, shown on the middle portion of the screen (See Figure 1-3) are available in Maternal/
Fetal monitor models only. The parameters include Maternal Blood Pressure, Maternal Heart/Pulse Rate, and
Maternal SpO2. Each parameter can have several modes depending on the type of its input.
Parameter
Parameter Mode
Maternal Blood Pressure
NIBP
Maternal Heart/Pulse Rate
MECG, Pulse, or INOP
Maternal SpO2
MSpO2
1.3.3 Waveform
The monitor display can show Fetal ECG Waveform, Maternal ECG Waveform, or Maternal SpO2 Pulsatile
Waveform on the bottom portion of the screen (See Figure 1-3). So the waveform can have several modes:
FECG, MECG, MSpO2, or Off.
1.3.4 Time
The display also shows Current Time, [Label] Frozen Message and Time of Activation (See Figure 1-3).
1.3.5 Softkeys
The display includes several system configuration softkey controls (See Figure 1-4). A softkey is an area on the
screen that can be selected with the Trim Knob Control. When the softkey is activated by pressing the Trim
Knob Control, it may cycle through available settings or it may display a setup screen.
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Description of softkeys:
Figure 1-4 Display Softkeys
A. Mode Title Softkeys: Selects US, US2, FECG, NIBP, MHR/P, or MSpO2 Setup screens.
B. ECG Scale Softkey: Selects 0.25x, 0.5x, 1x, 2x, 4x, or Auto.
C. MECG Lead Softkey: Selects Lead I, II, or III.
D. VSHX Softkey: Displays maternal Vital Signs History screen (See Figure 1-5).
E. Setup Softkey: Displays General Setup screen.
NOTE: For detailed information on setup screens, refer to Appendix E.
F. Alarms Softkey: Displays Master Alarm Setup screen.
G. Freeze Softkey: Freezes waveform for analysis; unfreezes waveform to return to real-time display.
H. Print Softkey: Prints 6-second snapshot of frozen waveform, real-time waveform, or maternal vital
signs history.
I. Waveform Softkey: Selects FECG, MECG, MSpO2, or Off.
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Figure 1-5 Maternal Vital Signs History Screen Softkeys
A. Print Softkey: Prints one page (screen) of the table.
B. PrintAll Softkey: Prints all pages (screens).
C. View Softkey: Scrolls through the data Counterclockwise for newest data or Clockwise for oldest data
D. Exit Softkey: Returns to the previous screen.
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1.4 Rear Panel Descriptions
CAUTION:
The maximum nondestructive voltage that may be applied to the rear panel connectors is 0 volts.
Do not connect cables to these connectors without ensuring the connectors comply with leakagecurrent requirements of one of the following applicable standards: UL 60601-1, CSA C22.2 No. 601.1
or IEC/EN 60601-1.
Figure 1-6 Rear Panel View
A. Vent: Provides ventilation for the monitor internal circuitry.
B. Telemetry Connector (J101): Connector for CorometricsTM 340 or Mini Telemetry system interface.
C. Data Entry Connector (J103): This connector is specifically designed for connecting to the legacy
CorometricsTM 2116B Data-Entry/Clinical-Notes Keyboard.
D. Nurse Call System (J104): This connector attaches to a standard Nurse Call System. The connector’s
maximum output is 50 Vdc at 100 mA and the maximum on resistance is 0.5 Ω. When connected to
a Nurse Call System, the monitor will activate the system each time a Spectra Alert is issued. This
interface simulates pressing the button on a bedside Nurse Call System allowing nurses to respond to
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patient needs quickly and efficiently. Although the J104 Nurse Call connector is physically present on
the optional communications package, this connector is only supported as part of the Spectra Alerts
option. The Spectra Alerts or Fetal Alarms can be enabled/disabled in Install Options Screen 2 in service
mode screens (Refer to Fetal Alerts/Alarms description under See Figure E-3).
E. Central Systems Connector (J102): This Centronics-type connector is designed for interfacing to a
legacy Corometrics Spectra 400 Central Surveillance and Alert System or other compatible analog
central information system. This connector is often referred to as the Analog Interface Connector.
F. External VGA Connector (J112): This 15-pin sub-D connector is for interfacing to an external VGA
display. Use of GE-recommended external display will allow monitor front panel display video to be
replicated remotely.
G. Speaker: The rear panel speaker emits audible tones for heart rates, MSpO2 pulse with %O2-dependent
pitch, and alarms. It also provides the sound for the song player feature.
H. Communication Connectors (J109, J110, J111): These RJ-11 connectors provide three RS-232C serial
interfaces that allow connecting the monitor unit to the following peripheral devices:
• Nellcor Puritan Bennett (NPB) N-200 Maternal Oxygen Saturation Monitor (J109 and J111 only)
• DINAMAP® PRO Series 100-400 Monitors
• DINAMAP® ProCare, V100 Monitors
• Quantitative Sentinel/Perinatal System (any RS-232C connector)
Upon shipping from the factory, all three ports are configured as follows:
• Communication Mode = 1371/Notes
• baudrate (bps) = 2400
At the above settings, connectors J109 and J111 are ready for connection to an NPB Model N-200. Connector J110 does not support a connection to NPB monitors. Therefore, this connector will have to be configured to communicate to the peripheral device.
Pin Number
Signal Name
1
RTS
2
RXD
3
GND
4
GND
5
TXD
6
CTS
Figure 1-7 J109, J110, J111 Pin Numbers and Names
I. ECG Out Connector: This 3-conductor stereo phone jack allows recording of FECG or MECG trends on
an external recorder. ECG signals are output at +80 dB with a bandwidth of 1.0 to 100 Hz. MECG signals
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are output at +60 dB with a bandwidth of 0.5 to 40 Hz. The output level from this port is 10 V/mV for
FECG and 1 V/mV for MECG.
J. Fetal Acoustic Stimulator Connector: Connector for CorometricsTM 146 Fetal Acoustic Stimulator
(FAST). A musical note symbol ( )prints on the strip chart paper each time CorometricsTM 146 is used.
K. Remote Event Marker Connector: This connector is for connection to an optional Corometrics Remote
Event Marker which is used to annotate the strip chart paper in the recorder with a mark. The mark can
be configured as one of the below:
• The event symbol ( ) to record an “event”
• The fetal movement symbol (
) to record the perceived fetal movement occurrence by the
mother. This is the default setting.
L. Equipotential Lug: A binding post terminal is directly connected to the chassis for use as an
equipotential connection.
M. AC Voltage Selection Switch: This switch is intended for authorized service personnel to select the
proper voltage for the AC input:
• 120: Lets the unit accept an AC input in the range of 100–120 VAC.
• 240: Lets the unit accept an AC input in the range of 220–240 VAC.
N. Power Inlet Module: AC line power cord connector.
1.5 Peripherals Description
This section provides information about the peripheral systems that can be attached to the CorometricsTM
250cx Series monitors.
1.5.1 CorometricsTM 340 Telemetry and Mini Telemetry
CorometricsTM 250cx Series monitor can be interfaced to a CorometricsTM 340 Telemetry system (receiver) or a
Mini Telemetry system (receiver) thought J101 connector on the rear side of the monitor. Upon connecting the
monitor to either telemetry systems, a “telemetry connected” symbol (
) will appear beneath FHR1 field on
the display when both the telemetry system and the monitor are turned on and the telemetry receiver detects
an active FECG, MECG, US, TOCO, or IUP mode from its corresponding transmitter. The “telemetry connected”
symbol will also be printed on the bottom line of the top grid of the strip chart paper upon commencement of
the telemetry monitoring and every 30 minutes along with the modes.
NOTE: When any telemetry mode (US, FECG, MECG, TOCO, or IUP) is detected, all equivalent front panel modes
(US, US2, FECG, MECG, TOCO, or IUP) are ignored. You cannot “mix and match” telemetry and monitor
modes.
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A “telemetry disconnected” symbol ( ) will be printed on the strip chart paper if the telemetry receiver is
unplugged from the monitor, or the telemetry system (transmitter or receiver) is turned off, or the telemetry
receiver does not detect any active mode information from its corresponding transmitter.
1.5.2 Quantitative Sentinel/Perinatal System
Through this interface, the monitor outputs MHR data, FHR data, and UA data to a central information such as
a Quantitative Sentinel/Perinatal System. Annotations made at the central station can be optionally printed on
the strip chart paper of the monitor as summarized below (if the central station has the capability to send the
command):
•
•
•
•
Each message is preceded by a computer icon ( ).
Messages are restricted to a maximum length of 50 characters.
Lower-case letters are converted to upper-case letters.
Non-standard characters are replaced with spaces.
The monitor can be configured with the remote annotation capability enabled (1371/Notes mode) or disabled
(1371 mode). Set the communication Mode to 1371 or 1371/Notes and the Baud rate to the specified value by
the manufacturer in the Communication Setup screen (See Figure E-4).
To connect a central information system:
1. Obtain an appropriate interface cable: connect one end to an available RS-232C connector (J109, J110, or
J111) on the monitor unit. Connect the other end to the wall plate wired to the central information system.
For a Quantitative Sentinel/Perinatal System: the interface cable is catalog number (REF) 1558AAO (10’) or
1558BAO (20’); the corresponding wall plate connector is labeled RS-232 COMMUNICATIONS.
2. Access the Communications Setup service mode screen and set the baudrate and mode for the appropriate
port to 1200 bps and either the 1371 or 1371/Notes mode, respectively. Then exit the service mode
screens.
1.5.3 Exergen® TAT-5000TM
Exergen® TAT-5000™ provides maternal temperature as a printout and vital signs history. Set the
communication Mode to Exergen and the Baud rate to 4800 in the Communication Setup screen (See Figure
E-4).
1.5.4 DINAMAP® Models PRO Series 100-400 and ProCare
All of the DINAMAP® Models PRO Series 100-400 ProCare, and V100 monitors can be interfaced to
CorometricsTM 250cx Series monitors using an ILC-1926 interface, one DINAMAP V-Link cable assembly (Part
number: 683235), and one CorometricsTM DINAMAP serial cable (Part number: 2007234-001) to provide a
printout of the NIBP parameter on the strip chart paper. Set the communication Mode to Critikon and the Baud
rate to the specified value by the manufacturer in the Communication Setup screen (See Figure E-4).
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1.6 Theory of Operation
The CorometricsTM 250cx Series system is made up of front-end and back-end sections, system power supply,
and recorder module. The Main board forms the heart of the monitor control functions. The Main board along
with the communications board forms the back-end section of the monitor. The front-end section boards are
housed in the sealed front-end card cage and consist of FECG/UA board, MECG board, Dual ultrasound board,
SpO2 carrier board, MSpO2 connector board, and the Frond-end motherboard. The DSP/Display board is the
bridge between the front-end and back-end sections. The recorder assembly houses the recorder board.
Figure 1-8 depicts the system block diagram of the monitor unit and illustrates all the boards, external parts,
their connections (cable or direct plug-in), isolated areas, and the functionalities of the boards.
Upon power-up, the CorometricsTM 250cx Series monitor automatically performs a number of tests to verify
the integrity of the system memory, processor, and voltage levels before allowing the monitor to enter the
normal operational mode. The pulse oximetry module is also tested (and automatically calibrated) upon
power up or whenever the module is reset. After setting the Power switch to the on (I) position, the tests run for
approximately 2 seconds. If all tests pass, the monitor enters the normal operational mode.
1.6.1 Digital System Processor (DSP) / Display Board
The DSP/Display board consists of two independent functioning sub-circuits: the DSP sub-circuit and the
Display interface sub-circuit.
The DSP circuitry processes analog and digital data from the front-end modules and interfaces to the main
processor. The ECG and ultrasound analog information is processed and heart rates are output to the Main
board via a shared memory. Digital pressure information is received, processed, and also sent to the shared
memory.
The Display sub-circuit, consisting mainly of a shared memory and timing generator, provides the interface
between the LCD and the main processor. Circuitry for the main processor to adjust the brightness of the LCD
is provided through a DC-to-AC inverter. RS-232 communications between the Main board and the UI keypad
board are routed through the DSP board.
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Figure 1-8 System Block Diagram
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1.6.2 Main Board
The Main board makes up the central processing unit for the monitor unit. The Main board accepts
simultaneously processed parameters directly from four separate modules. The minimum configuration
monitor has only the DSP board as an input module. Heart rate (ultrasound and or FECG), uterine activity data,
mode information, and FMD data flow from the DSP board to the Main board via DSP board FPGA shared
memory. Maternal and fetal Oximetry makes up the second and third modules. Information from these devices
is passed to the Main board via RS-232 ports. The Main board communicates with the front panel UI keypad
board using RS-232 interface, which is routed through the DSP board. The Main board also provides a master
reset for the UI keypad board. The Main board holds the NIBP control circuitry (minus pump and valves) and
communicates to it using a CMOS interface. The Main board connects to the Pneumatics board which holds
the NIBP pump, valves, and filter. The Main board contains three external RS232 data ports for various external
devices and setup/code update functions. The Main board receives data from the rear panel options board to
allow the added Communication features. The Main board formats all the data and interfaces to the recorder
board. The Main board also controls all of the audio functions including generated tones to passing ultrasound
audio from the ultrasound board.
The Main board contains one dip switch pack (SW1) that determines some of the monitor configurations (See
Table 1-2). The current settings of the SW1 switches can be checked without removing the unit top cover
by accessing the Diagnostic Control screen (See section E.5), which displays the status of switches from left
(i.e. switch number 8) to right (i.e. switch number 1). A “1” status means the corresponding switch is off and
a “0” status means the corresponding switch is on. To change the switch settings, the unit top cover shall be
removed to access the SW1 swtich. Below is an example of the SW1 switch status:
Table 1-2: SW1 Switch Settings
Switch Number
Switch Name & Description
1
Factory Test: For factory use only
J102 Output Levels: Select between J102 outputs compatible
2
TM
4
5
6
7
8
Settings
Off = Enabled
with HP or Corometrics
Off = HP
On = CorometricsTM
NIBP Option: Enable/disable the maternal NIBP.
Off = Enabled
MSpO2 Option: Select between the MSpO2 options.
Nellcor: 5=Off, 6=Off
Masimo: 5=On, 6=Off
No MSpO2: 5=On, 6=On
Inactive
MECG Option: Enable/disable the MECG option.
Inactive
Off = Enabled
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1.6.3 User-Interface Keypad & Volume/Alarm Keypad Boards
The user-interface keypad board is responsible for two functions, a) input controls, and b) the recorder chart
light feature. The board contains most of the front panel buttons (except for the volume and alarm cancel
buttons) and receives input from the Trim Knob Control. The keypad is of the elastomeric type and utilizes
backlight LEDs to light each key. The board also receives the volume/alarm keypad board inputs through an
external cable, processes all key closures, and communicates the key statuses to the main processor. The
Main board receives data from the main processor (routed through DSP/Display board) and controls the
Recorder Indicator LED. The volume/alarm keypad board contains the volume and alarm key buttons and
sends the button statuses to the user-interface keypad board. The volume/alarm keypad board is also of the
elastomeric type and has backlight LEDs for each key. The user-interface keypad board interface with the Main
board is through an RS-232 interface.
1.6.4 Video Decoder Board
The video decoder board interfaces between the DSP/Display board and the LCD panel. The video decoder
board performs conversion of 4-bit color information from the FPGA output to the 18-bit color required by the
LCD panel. This provides a 16-color palette. The translation is accomplished in the FPGA on the video decoder
board. This board receives high-speed video from the DSP/Display board.
1.6.5 Recorder Board
The recorder board is responsible for driving the recorder motor and the recorder print head device along with
providing the main system board with paper out/low/misload status. To drive the motor it receives pulses from
the main system board and provides the proper drive circuitry to drive the stepper motor 4 phase windings.
To drive the print head an adjustable power supply is provided which is set to the print head specifications
(each print head is unique). Data to be printed and control information is received from the main system board,
buffered and presented to the print head. Sensors from the recorder assembly to detect paper low/out/misload
are received and translated to digital status lines to be sent to the main system board.
1.6.6 Communications Board
The communications board contains three basic interfaces. It supports the analog interface (J102) to the
legacy Spectra 400 surveillance system as well as other manufacturer’s centrals, a 2116 external keyboard
interface for strip chart annotation, and an analog telemetry interface to the CorometricTM 340 or Mini
Telemetry system. The communications board communicates to the system by directly plugging into the main
system board. Digital data from the keypad interface and telemetry (modes only) is transferred through a data
bus and analog signals (MECG, FECG, Ultrasound, TOCO) from the telemetry are separately routed through the
Main board to the DSP for processing similarly to the existing front panel patient data.
1.6.7 MSpO2 Connector Board
The MSpO2 connector board receives the universal SpO2 patient cables on the front bezel of the monitor unit
and transfers the analog signals on to the internal SpO2 cable that in turn connects to the SpO2 Carrier board.
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All the signals entering this board are patient isolated and signals leaving this board though the MSpO2 cable
are also isolated.
1.6.8 MSpO2 Carrier Board
The SpO2 carrier board holds the SpO2 module. It receives MSpO2 patient cable connections from the universal
front-end connector board and internal cable on its isolated side and routes them to the connected NELL3-S,
Nellcor MP-506 or NELL-3, or Masimo MS-11 or MS-2011 modules. It supplies isolated power to the SpO2
modules and transfers the isolated data generated by the modules using opto-couplers to the front-end
motherboard on to the monitor system for processing. The monitor system is able to reset the maternal and
the SpO2 modules using opto-coupled reset lines.
1.6.9 FECG/UA Board
The FECG/UA board is made up of two separate isolated patient front-end sub-circuits: FECG and Uterine
Activity. The FECG sub-circuit converts the low level signals received from the fetus through the spiral electrode
to electrical impulses which are amplified, filtered, and sent across an isolation barrier. The un-isolated FECG
signal then is further amplified and sent off the FECG board, routed by the front-end motherboard to the DSP/
Display board, where it is digitized and processed. Additionally, the FECG mode line (cable plugged in sense line)
from the ECG connector is digitized and sent over the barrier via an opto-coupler where it is routed similarly to
the FECG analog signal.
The Uterine Activity sub-circuit processes the pressure signals from the external TOCO or IUP sensor (use same
inputs), by amplifying and filtering the inputs, and then converts the signals via serial analog to digital (A/D)
converter. The output of the A/D converter is then sent across the isolation barrier, routed through the frontend motherboard through to the DSP/Display board where it is further processed. Two mode lines from the UA
patient connector are also digitized: TOCO present and IUP present (only one cable can be plugged in at a time).
These signals are then sent over the barrier via an opto-coupler where they are routed similarly to the TOCO/
IUP digitized signals.
1.6.10 MECG Board
The MECG board processes the isolated MECG signals present from the ECG front panel connector. The multilead signals first go through programmable lead switching circuitry controlled by the DSP processor. The MECG
signal is then amplified and filtered and sent across the isolation barrier where it is routed through the frontend motherboard to the DSP/Display board, digitized and processed. The MECG board also contains an ECG
test signal on the isolated side which is used when the monitor front panel test button is depressed. This tests
most of the front-end circuitry paths. The MECG board also contains pacemaker detection circuitry allowing
the monitor to blank out the pulses for proper counting.
1.6.11 Dual Ultrasound Board
The dual ultrasound board generates the ultrasound timing signals to pulse the external patient connected
ultrasound transducer crystals and provides the necessary receive circuitry to detect the reflected waveforms.
It does this by first demodulating the needed signal off of the carrier and filtering the signals which are then
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sent through the frontend motherboard to the DSP where they are digitized and processed. No isolation is
present from the patient connector through the ultrasound board as the plastic ultrasound transducer forms
the physical isolation barrier.
1.6.12 Isolated Power Supply Board
The isolated power supply board provides all of the isolated power for the FECG/UA board, MECG board and
the carrier board which in turn feeds the two SpO2 modules (MSpO2). The ultrasound board is not powered from
this board as it is not electrically isolated. The isolated power supply is made up of two isolated sets of supplies.
One supply set is specifically for FECG on the FECG/UA board. The other isolated set of supplies powers the
remaining functions including TOCO/IUP (on the FECG/UA board), MECG (MECG board), and the SpO2 Carrier
board (SpO2 modules). The un-isolated power input to this PWA consists of +20 volts routed from the front-end
motherboard through the DSP and Main board and then finally the system power supply.
1.6.13 Front-End Motherboard
The front-end motherboard is a passive inter-connection board which houses all of the front-end parameters
except for NIBP. In addition to the parameters, it holds the isolated power supply. The board routes all of the
isolated and un-isolated signals to and from the DSP/Display board. This includes both analog and digital
parameter inputs and digital control outputs. On the front-end side it interfaces to the pressure channel frontend cable and the FECG front-end cable, which carries all of the FECG signals as well as the MECG mode lines.
The MECG analog signals are routed separately from the front panel to the MECG daughter board. The MSpO2
input signals enter the SpO2 carrier board directly.
1.6.14 Memory Battery
Whenever the monitor is turned off, a battery provides power to the Random Access Memory (RAM) that stores
information such as time, date, default settings, etc. An icon (
of the monitor display in the following circumstance:
) will appear in the upper right-hand section
A. RAM data corruption: The (
) icon appears for a short period of time after the system power-up
on the monitor display in data corruption conditions, which makes the monitor revert to the factory
settings. To re-configure the settings, access the setup screens.
B. Bad Battery: The (
) icon appears steadily after the system power-up on the monitor display when
the RAM battery has reached end-of-life and needs to be replaced.
NOTE: Always set the time and date prior to the initial operation of the monitor after the RAM battery
replacement. Update the settings during the daylight-saving time changes.
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Chapter 2: Installation
This chapter provides information required to install the CorometricsTM 250cx series monitor.
2.1 Time Required for Installation
The average installation time for the CorometricsTM 250cx series monitor is approximately 10 minutes. The
required checkout procedures after installation takes approximately 30 minutes.
2.2 Environmental Requirements
The system shall be installed, serviced, and operated within the environmental conditions described in section
A.1.
2.3 Tool Requirements
None
2.4 Installation Procedure
2.4.1 Strip Chart Recorder Paper Load
CAUTION:
Use GE-approved recorder paper only. Using the wrong paper may damage the recorder print head
and product inferior print quality.
CAUTION:
The monitor recorder shall be loaded with the paper at all times. This reduces particle build-up on
the print head and facilitates opening the recorder door.
© 2013 by General Electric Company. All rights reserved.
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To load strip chart recorder paper perform below steps:
1. Press down the latch on the right side of the strip chart recorder door (See Figure 2-1).
2. Fan the pack of Z-fold paper on all sides to loosen any folds and to ensure proper feed of the paper
through the recorder.
3. Hold the package of paper such that the black squares are on the bottom of the pack and the Corometrics
logo and page numbers are on the left side of the pack (See Figure 2-2).
NOTE: The black squares indicate the end of the recorder paper. When the black squares appear, the strip chart
recorder has approximately 20 minutes of paper remaining, when running at a speed of 3 cm/min.
4. Unfold two sheets from the top of the package so that they extend toward you (See Figure 2-3).
5. Place the pack of paper in the drawer so that the pack is in a flat position in the recorder (See Figure 2-4).
6. Slowly close the strip chart recorder door, being careful not to skew the paper (“Figure 2-5”).
30
Figure 2-1
Figure 2-2
Figure 2-3
Figure 2-4
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Chapter 2: Installation
2.4.2 Peripheral Connections
If present, connect the below optional peripherals to the CorometricsTM 250cx series monitor as per the
following instructions:
Remote Event Marker: Plug the marker connector into its corresponding jack on the rear side of the monitor.
Corometric 340 Telemetry / Mini Telemetry system: Plug the interconnect cable (Part number: 1563AAO) into
the Telemetry Connector (J101) on the rear side of the unit (Refer to Corometric 340 Telemetry / Mini Telemetry
service manuals for installation details).
External Video Display: Plug the display cable into the External Display Connector (J112) on the rear side of
the unit.
Quantitative Sentinel / Perinatal System: Plug the interface cable into an available RS-232C connector (J109,
J110 or J111) on the rear side of the unit.
2.4.3 Power Cord Attachment
1. Confirm the monitor power switch is in off (O) position.
2. Connect the power cord to the power connector on the rear panel of the monitor and secure the power
cord with the P Clamp (See Figure 2-6).
3. Verify that the AC voltage selector on the rear panel of the monitor is set to the correct country-specific
voltage (See Figure 2-6).
CAUTION:
Incorrect setting of the AC voltage selector can damage the monitor.
4. Plug the power cord into a power outlet.
2.4.4 System Configuration
1. Turn the monitor on. Confirm that the Power indicator (green light) illuminates, the monitor display is on,
and the monitor generates a series of tones, indicating that the unit has been turned on.
Figure 2-5
© 2013 by General Electric Company. All rights reserved.
Figure 2-6
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Chapter 2: Installation
2. Use the Trim Knob Control to select the Setup softkey to display the General Setup screen and set
the correct date and time (“Figure 2-7”). Set the paper speed in accordance with the hospital or local
requirements.
WARNING:
Incorrect paper speed setting results in inaccurate waveform prints on the strip chart paper.
3. Select the Service softkey on the screen to have the Service Lock screen with 0 0 0 0 access code displayed
(“Figure 2-8”).
4. Use the Trim Knob Control to enter the access code as either the current month or day (MMDD) or day and
month (DDMM), depending on how the monitor is configured. For example, April 23 shall be entered as 0 4 2
3.
NOTE: To gain access to the service screens, the correct date and time must be set on the General Setup
screen.
5. Upon entering the access code, press the Trim Knob Control to access Install Options Screen 1 screen.
(“Figure 2-9”).
6. Use the Trim Knob Control to navigate on the screen and change the factory default settings if necessary
(See Appendix E for configuration setting details). Make sure to set the paper scaling to match with the type
of paper used.
WARNING:
Incorrect paper scaling setting (mismatch between the paper scaling and type of paper used) results
in invalid waveform prints on the strip chart paper.
7. If any peripherals are installed to communicate to the monitor through RS-232C connectors, use the
Trim Knob Control to select the COMM softkey on Install Options Screen 1 to access the Communication
Setup screen (“Figure 2-10”). Use the Trim Knob Control to set the communication baud rates and modes
to be compatible with the external peripheral device and then exit the screen. For more information on
Communication Setup screen fields, refer to section E.4.
NOTE: For Quantitative Sentinel/Perinatal System, set the baud rate and mode for the appropriate port to 1200
bps and either the 1371 or 1371/Notes respectively.
8. Use the Trim Knob Control to select the NextPage softkey to access the Install Options Screen 2 screen and
change the factory default settings if necessary. (See Appendix E for configuration setting details).
9. To store the changed configuration settings as the monitor default settings, use the Trim Knob Control to
select Store Current to Hospital option on the Install Options Screen 2 screen. Confirm the Default Setting
option changes to Hospital (“Figure 2-11”).
WARNING:
When the monitor is turned on or restarted, the configuration settings revert back to the Default
Setting option selected, i.e. Factory or Hospital.
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Chapter 2: Installation
10. Use the Trim Knob Control to select Restart softkey to accept the settings and reboot the unit.
11. Perform the checkout procedures as instructed in chapter 3 before putting the monitor into use.
Figure 2-7
Figure 2-8
Figure 2-9
Figure 2-10
Figure 2-11
© 2013 by General Electric Company. All rights reserved.
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Chapter 2: Installation
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Chapter 3: Maintenance and Checkout
This chapter includes planned maintenance procedures as well as checkout procedures required after
CorometricsTM 250cx series product installation, repair, or maintenance. These procedures must be performed
by authorized service personnel.
3.1 Procedures Schedule
Table 3-1 lists all planned maintenance and checkout procedures, specifies when and how often each
procedure should be performed, and provides the approximate time taken to perform each procedure.
For good care and maintenance of the CorometricsTM 250cx series product, perform planned maintenance
procedures at specific time intervals. The checkout procedures should be performed after any installation,
repair, calibration, maintenance, or part replacement.
Table 3-1: Maintenance and Checkout Procedures Schedule
Approximate
Time
To Be Performed as
Planned Maintenance
To Be Performed as
Checkout after any
Service*
Visual Inspection
2 minutes
Annually
YES
Cleaning
2 minutes
Annually
As needed
Transducers Checks
5 minutes
Annually
As needed
Functional Checks
20 minutes
Annually
YES
NIBP Calibration Check
8 minutes
Annually
As needed
Electrical Safety Tests
8 minutes
Annually
YES
Procedure Name
* Service includes installation, repair, calibration, maintenance, or part replacement.
WARNING:
Do not service the CorometricsTM 250cx series unit while it is in clinical use.
CAUTION:
Table 3-1 shows the minimum frequencies required for maintenance. Always follow hospital and
local regulations for required frequencies.
© 2013 by General Electric Company. All rights reserved.
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Chapter 3: Maintenance and Checkout
3.1.1 Environmental Requirements
The system shall be installed, serviced, and operated within the environmental conditions described in section
A.1.
3.2 Tool Requirements
The following table lists the service tools required to perform the planned maintenance and checkout
procedures:
Table 3-2: Tool Requirements for Planned Maintenance and Checkout Procedures
Procedure Name
Service Tools Needed (QTY)
Visual Inspection
None
Cleaning (Thermal Print Head)
Methanol or Isopropyl Alcohol, Cotton Swab, Sterile Gauze
Transducers Checks
None
Functional Checks
PS320 Fetal Fluke® Simulator (2), Fluke® Mechanical Fetal Heart (1),
Ultrasound Transducers(2), TOCO Transducer (1), Y Adapter Cable (1),
Ultrasound Gel
NIBP Calibration Check
Adult Cuff (1), 3" Cylinder (1), Standard 12-foot NIBP hose (1), External
Manometer (1) capable of reading to 350mmHg (46.7 kPa), Hand Pump Bulb
(1)
Electrical Safety Tests
Electrical Safety Analyzer (1), Multimeter (1), MECG Cable (1), IUP Transducer
(1), SpO2 Sensor (1), Ultrasound Transducer (1), some Aluminum Foil
3.3 Maintenance and Checkout Procedures
3.3.1 Visual Inspection
1. Unplug the monitor power cord from the power outlet and disconnect it from the monitor.
2. Examine the power cord for any signs of damage. Replace the power cord if damage is evident.
3. Confirm the power cord is secured to the monitor with the power cord retainer.
4. Inspect the overall unit (top cover, front bezel, screen display, connectors, front panel buttons) for any
damaged (cracked or broken) or missing parts. If any part is damaged or missing, replace it.
5. Inspect the unit for any missing labels. Make sure the labels are attached in the proper locations. For a list
of labels, refer to section 7.2. For the proper location of each label, refer to Figure 7-4.
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Chapter 3: Maintenance and Checkout
3.3.2 Cleaning (Thermal Print Head)
NOTE: This section only includes the cleaning procedures to be performed by the service personnel. For a
complete list of general cleaning procedures to be performed by the operator, refer to the CorometricsTM
250cx series Operator’s Manual.
1. Confirm the monitor is turned off and the power cord is unplugged from the power outlet.
2. Use cotton swabs and methanol or isopropyl alcohol to clean the thermal print head heater elements and
remove any accumulated paper dust.
NOTE: Do not touch the heater head with bare hands.
CAUTION:
Allow the cleaned elements to air dry completely prior to putting the unit back into use.
3.3.3 Transducer Checks
This section provides instructions to confirm the operational and functional performance of the transducers.
3.3.3.1 Ultrasound Transducer Checks
NOTE: Always use GE-approved transducers only.
1. Visually inspect the transducer case, the cable, the strain relief, and the connector pins for any signs of
damage. Replace the transducer if damage is evident.
2. Turn the monitor on and connect the ultrasound transducer to either US or US2 input connector of the
monitor unit and confirm that:
a. The FHR1 value shows three steady dashes “– – –.”
b. The FHR1 mode shows US.
c. The recorder prints US on the center margin of the strip chart paper after approximately 20 seconds.
3. Hold the ultrasound transducer in your hand with the transducer front facing the palm of your hand and
use your other hand to gently press and depress the back of the transducer rhythmically while maintaining
a steady rate. Confirm the following:
a. The FHR1 value on the monitor follows the input rate.
b. The recorder follows the input rate.
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c. The FHR1 heartbeat indicator ( ♥ ) flashes for each input.
d. Ultrasound audio is generated from the speaker on the rear side of the monitor.
3.3.3.2 TOCO Transducer Checks
NOTE: Always use GE-approved transducers only.
1. Visually inspect the transducer case (especially on the diaphragm located on the bottom of the transducer),
the cable, the strain relief, and the connector pins for any signs of damage. Replace the transducer if
damage is evident.
2. Turn the monitor on and connect the TOCO transducer to UA input connector of the monitor.
3. Use the Trim Knob Control of the monitor to access the Install Options Screen 2 and note the Default TOCO
Reference setting. Exit the service mode by selecting Restart at the bottom of the screen.
4. Momentarily depress the UA Reference Button of the monitor and confirm that:
a. The UA value shows the default setting.
b. The UA mode shows TOCO.
c. The recorder prints TOCO on the strip chart paper.
5. Apply gentle pressure to the TOCO transducer diaphragm and confirm that the UA value responds to the
pressure input. Increasing force should produce an increasing value and vice versa.
3.3.4 Functional Checks
This section provides instructions to confirm the operational and functional performance of the monitor unit.
NOTE: Always use GE-approved transducers only.
3.3.4.1 Indicators, Display, and Recorder Checks
1. Make sure that all transducers are disconnected from the front panel of the unit and the strip chart is
loaded into the recorder.
2. Turn the unit power on. Confirm that the unit generates two tones from the rear panel speaker and the
Power Indicator (green light) illuminates.
3. Confirm that the monitor display is on and it is showing the General screen.
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4. If present, connect the external display to the monitor unit (J112 connector) and confirm the external
display mimic the monitor display content.
5. Turn the recorder on and depress the Mark Button on the front panel and verify that an event mark (
printed on the lowest portion of the HR scale on the recorder paper.
) is
6. Use the Trim Knob Control to access the General Setup screen and take a note of the value set for paper
speed.
7. Depress the Record Button and confirm the following:
a. The yellow indicator next to the button illuminates continuously.
b. The recorder paper advances at a rate equal to the paper speed value in General Setup screen.
c. The recorder prints the correct time and date information on the strip chart paper.
d. The recorder prints the messages CARDIO INOP and UA INOP.
e. The recorder prints the paper speed value, 1 cm/min or 3 cm/min.
8. Depress and hold the Paper Advance Button on the front panel and verify that the recorder paper
advances at a rate of 40 cm/min by measuring.
9. Release the Paper Advance Button and verify that the recorder prints the paper speed value.
10. Access the Install Options Screen 1 screen again to change the paper speed and verify that the recorder
prints the correct paper speed value and also advances at the correct speed.
11. Make sure to set the paper speed in the General Setup screen in accordance with hospital or local
requirements.
WARNING:
Incorrect paper speed setting results in inaccurate waveform prints on the strip chart paper.
3.3.4.2 Self-Test Routine
1. Make sure GE-approved strip chart paper is loaded into the unit recorder.
2. Turn the unit power on.
3. Depress the Test Button and confirm the following:
a. Display Test: All display pixels extinguish for one second and then illuminate for one second. A green
horizontal line moves down on a red background followed by a blue vertical line moving from left to
right.
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b. Lamp Test: The yellow Record Indicator illuminates.
c. Recorder Test: The recorder prints the message TEST: ARE ALL DOTS PRINTED? followed by two vertical
lines and four horizontal lines. The two vertical lines should appear continuous and indicate a fully
functional print head. The four horizontal lines align with the heart rate and uterine activity scales, i.e.,
30 and 240 BPM or 50 and 210 BPM, and 0 and 100 mmHg (0.0 and 13.3 kPa).
NOTE: If the simulated fetal heart rate trends do not appear in the correct positions on the strip chart recorder
paper, ensure the monitor paper scale (30-240 bpm or 50-210 bpm) setting matches the type of paper
being used, i.e., 30 bpm/cm or 20 bpm/cm (See Scaling in section E.2).
WARNING:
Incorrect paper scaling setting (mismatch between the paper scaling and type of paper used) results
in invalid waveform prints on the strip chart paper.
d. Counting Test: After the recorder test, the display returns to the General screen. The software generates
a 120 bpm rate in the FHR1 area, a 180 bpm rate in the FHR2 area, and shows 50 mmHg in UA area
and all mode titles display Test.
NOTE: To stop a self-test routine that is in progress, depress the Test Button or open the recorder door.
NOTE: The recorder returns to its original on, off, or maternal-only mode state before the Test Button was
depressed.
3.3.4.3 RS-232C Loopback Check
1. Turn on the monitor and use the Trim Knob Control to enter into service mode and access the
Communication Setup screen.
2. Insert a loopback test connector into each RS-232C communication port (J109, J110, and J111) on the rear
side of the unit (See Figure 1-6).
NOTE: If a loopback test connector is not available, for each communication port manually bridge pin 2 (RXD)
and pin 5 (TXD) together (See Figure 1-7).
3. For each communication port, set the mode field on the Communications Setup screen to Loopback and
then press the Trim Knob Control to select it. Notice that the word OFF displays to the right of the mode.
4. Confirm that the status Loopback OK displays after a few seconds (See Figure E-4).
NOTE: OK indicates that the test has passed and OFF indicates test failure. Do not use the communication port
that fails the test. Contact service for repair.
5. Exit the Communication Setup screen and select Restart in the Install Options Screen 1 screen to reboot the
monitor.
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Chapter 3: Maintenance and Checkout
3.3.4.4 Alarms Check
NOTE: The instructions in this procedure are based on the use of Fluke® PS320 simulator. Refer to Appendix G
for CorometricsTM 325 simulator use instructions.
1. Make sure the monitor unit and the PS320 simulator are both turned off.
2. Connect a Y adapter cable (GE Part number: 1442AAO) to the monitor and then connect the 3-Lead MECG
cable (orderable through GE part number: 2025177-055) to the MECG connector of the Y adapter and the
left panel terminals of the PS320 simulator as per below connection diagram (See Figure D-1):
3-Lead ECG Cable Terminal Name
PS320 Simulator - Left Panel Terminal
Left Arm (LA)
shall be connected to
Fet/Mat
Left Leg (LL)
shall be connected to
Maternal
Right Arm (RA)
shall be connected to
Reference
3. Turn on the PS320 simulator and the monitor unit.
4. Use the Trim Knob Control of the monitor unit to select MECG to access the MHR/P Setup screen.
5. Set the MHR/P source to MECG.
6. Set HR/PR Trace to On.
7. Set the MHR/P high alarm limit value to 120 BPM.
8. Set the MHR/P low alarm limit value to 80 BPM.
9. Set the Alarm Volume to a level you can easily hear.
10. Exit the MHR/P Setup screen.
11. Use the PS320 simulator front panel to set the Maternal ECG parameters, MAT.(Rate) to 100 BPM and
Amplitude to 0.5mV.
NOTE: For PS320 simulator setup information, see Appendix D.
12. Set the MECG parameter on PS320 to 140 BPM as indicated on the monitor and confirm that:
a. An audio alarm (alternating high/low tones) is emitted from the rear panel speaker.
b. The MECG value flashes.
13. Depress the Alarm Silence Button on the monitor front panel and confirm that:
a. The audio alarm stops.
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b. The ALARM SILENCE X:XX message box appears on the screen and a countdown is started.
14. Wait for the user-specified re-alarm time to end and confirm that the audio alarm is once again generated
from the rear panel speaker.
15. Set the MECG parameter on PS320 to 120 BPM as indicated on the monitor and confirm that:
a. The audio alarm stops.
b. The MECG value no longer flashes.
c. After 10 seconds, the two above conditions are still true.
16. Set the MECG parameter on PS320 to 80 BPM. Confirm that no audio alarm is generated from the rear
panel speaker.
17. Decrease the MECG rate to 60 BPM and confirm that:
a. The audio alarm is generated from the rear panel speaker.
b. The MECG value flashes.
18. Depress the Alarm Silence Button on monitor front panel and confirm that:
a. The audio alarm stops.
b. The MECG value continues flashing.
c. The message ALARM SILENCE X:XX appears on the screen and a countdown is started.
19. Wait for the user-specified re-alarm time to end and confirm that the audio alarm is once again generated
from the rear panel speaker.
20. Set the MECG parameter on PS320 to 80 BPM as indicated on the monitor and confirm that:
a. The audio alarm stops.
b. The MECG value no longer flashes.
c. After 10 seconds, the two above conditions are still true.
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Chapter 3: Maintenance and Checkout
3.3.4.5 MSpO2 Check
1. Use the Trim Knob Control on the monitor front panel to select MSpO2 on the General screen to access the
MSpO2 Setup screen and configure as follows:
a. For Nellcor Models: Set Response Time to Fast, Print Interval to 2 minutes, and % O2 Trace to On.
b. For Masimo Models: Set Sensitivity to Normal, Averaging to 8, Print Interval to 2 minutes, and % O2
Trace to On
2. Access the Install Options Screen 1 and set the SpO2 Scale to Auto.
3. Set Default Settings to Hospital in Install Options Screen 2 and then select Store Current to Hospital to save
the settings. Exit the service mode by selecting Restart at the bottom of the screen.
4. Attach an SpO2 sensor to your finger and connect it to the monitor and allow the monitor a few seconds to
obtain a steady reading.
5. Select Pulse/MECG to enter MHR/P Setup screen and change MHR/P Source to MSpO2 and HR/PR Trace to
On and then exit back to General screen.
6. Use Trim Knob Control to set the waveform softkey (on the bottom of General screen) to MSpO2.
7. Turn on the recorder and allow data to collect for at least five minutes and confirm that:
a. The correct waveform appears on the display.
b. The MSpO2 shows a value on the display.
c. The MSpO2 pulse amplitude indicator shows a fluctuating bar graph.
d. The MHR/P display mode shows Pulse.
e. The MHR/P displays a value.
f. The MHR/P trend plots in the top grid with the above value.
g. The MSpO2 scale grid marks stamp on the paper.
h. The message MSpO2% is printed in the annotation line on the strip chart paper.
i. A diamond symbol ◊ (with MSpO2 and MHR/P vital signs) is printed in the annotation area on the strip
chart paper at 2-minute intervals.
© 2013 by General Electric Company. All rights reserved.
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3.3.4.6 MECG Input Check
NOTE: The instructions in this procedure are based on the use of Fluke® PS320 simulator. Refer to Appendix G
for CorometricsTM 325 simulator use instructions.
1. Make sure the monitor unit and the PS320 simulator are both turned off.
2. Connect a Y adapter cable (GE Part number: 1442AAO) to the monitor and then connect the 3-Lead MECG
cable (orderable through GE part number: 2025177-055) to the MECG connector of the Y adapter and the
left panel terminals of the PS320 simulator as per below connection diagram:
3-Lead ECG Cable Terminal Name
PS320 Simulator - Left Panel Terminal
Left Arm (LA)
shall be connected to
Fet/Mat
Left Leg (LL)
shall be connected to
Maternal
Right Arm (RA)
shall be connected to
Reference
3. Turn on the PS320 simulator and the monitor.
4. Use the PS320 simulator front panel to set the Maternal ECG parameters, MAT.(Rate) to 60 BPM and
Amplitude to 0.5mV.
NOTE: For PS320 simulator setup information, see Appendix D .
5. Verify that the monitor display shows a value of 60 BPM and confirm that:
a. The MHR/P mode shows MECG.
b. The MHR heartbeat indicator ( ♥ ) flashes at a rate of 60 times per minute (1 per second).
6. Change the MAT. rate to 80 BPM on the PS320 simulator. Confirm the following on the monitor display and
the recorder:
a. The MHR Value shows 80 ± 1.
b. The MHR heartbeat indicator ( ♥ ) flashes at a rate of 80 times per minute.
c. The ECG “beep” volume is generated from the rear panel speaker.
d. The volume can be adjusted on the MHR/P Setup screen.
e. The recorder prints a continuous line at 80 BPM on the top grid of the strip chart paper. (Set HR/PR
Trace to On in the MHR/P Setup screen.)
7. Repeat step 6 for each of the following rates: 100, 120, 140 and 160 BPM.
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3.3.4.7 FECG Input Check
NOTE: The instructions in this procedure are based on the use of Fluke® PS320 simulator. Refer to Appendix G
for CorometricsTM 325 simulator use instructions.
1. Make sure the monitor unit and the PS320 simulator are both turned off.
2. Connect a Y adapter cable (GE Part number: 1442AAO) to the monitor and then connect the 3-Lead FECG
cable (orderable through GE part number: 2025177-055) to the FECG connector of the Y adapter and the
left panel terminals of the PS320 simulator as per below connection diagram:
3-Lead ECG Cable Terminal Name
PS320 Simulator - Left Panel Terminal
Left Leg (LL)
shall be connected to
Fet/Mat
Right Arm (RA)
shall be connected to
Fetal
Left Arm (LA)
shall be connected to
Reference
3. Turn on the PS320 simulator and the monitor unit.
4. Use the PS320 simulator front panel to set the Fetal ECG parameters, Fetal(Rate) to 60 BPM and Amplitude
to 0.5mV.
NOTE: For PS320 simulator setup information, see Appendix D .
5. Look at the monitor display until the monitor displays a value of 60 BPM and confirm that:
a. The MHR/P mode shows MECG.
b. The MHR heartbeat indicator ( ♥ ) flashes at a rate of 60 times per minute (1 per second).
6. Change the Fetal rate to 80BPM in the PS320 simulator. Confirm the following on the monitor display and
the recorder:
a. The MHR Value shows 80 ± 1.
b. The MHR heartbeat indicator ( ♥ ) flashes at a rate of 80 times per minute.
c. The ECG “beep” volume is generated from the rear panel speaker. The volume can be adjusted on the
MHR/P Setup screen.
d. The recorder prints a continuous line at 80 BPM on the top grid of the strip chart paper. (Set HR/PR
Trace to On in the MHR/P Setup screen.)
7. Repeat step 6 for each of the following rates: 100, 120, 140 and 160 BPM.
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3.3.4.8 Ultrasound Input Check
NOTE: The instructions in this procedure are based on the use of Fluke® PS320 simulator. Refer to Appendix G
for CorometricsTM 325 simulator use instructions.
1. Make sure the monitor and the PS320 simulator are both turned off.
2. Connect a GE-approved ultrasound transducer to the US input connector of the monitor and connect the
Fluke® mechanical fetal heart (MFH-1) to the US1 port of the PS320 simulator.
3. Place the ultrasound transducer face up on a flat surface and coat the face with an appropriate ultrasound
conductive gel.
4. Turn on the PS320 simulator and the monitor unit.
5. Place the simulation window of the mechanical fetal heart over the ultrasound transducer and then use the
PS320 simulator front panel to set the ultrasound (Fetal Heart Rate) parameters Fetal (Rate) to 120 BPM and
Amplitude to 50µV.
NOTE: For PS320 simulator setup information, see Appendix D .
6. Make sure the monitor recorder is on. Depress the Record Button on the monitor front panel to turn the
recorder on if necessary.
7. Confirm the following on the monitor display and the recorder:
a. The FHR1 mode shows US.
b. The FHR1 value shows 120 ± 1.
c. The FHR1 heartbeat indicator ( ♥ ) flashes at a rate of 120 times per minute.
d. The ultrasound audio is generated from the rear panel speaker and the volume can be adjusted using
the Volume (Increase/Decrease) Buttons.
e. The recorder prints a continuous line at 120 BPM on the top grid of the strip chart paper.
f. The recorder prints US on the center margin of the strip chart paper after approximately 20 seconds.
8. Increase the US value from 120 BPM baseline to 150 BPM in the PS320 simulator. Confirm the following on
the monitor display and the recorder:
a. The FHR1 value immediately shows 150 ± 1.
b. The recorder prints a continuous line at 150 BPM on the top grid of the strip chart paper.
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9. Decrease the US value from 120 BPM baseline to 90 BPM in the PS320 simulator. Confirm the following on
the monitor display and the recorder:
a. The FHR1 value immediately shows 90 ± 1.
b. The recorder prints at the last input rate for an additional 3 seconds before blanking the heart rate data
and printing a continuous line at 90 BPM on the top grid of the strip chart paper
10. Set the US value to each of the following rates in PS320 simulator: 60, 90, 120, 150, 180, and 210 BPM and
confirm that:
a. The FHR1 value reflects the rate set in the PS320 simulator with a tolerance of ± 1 BPM .
b. The FHR1 heartbeat indicator ( ♥ ) flashes at the rate set in the PS320 simulator.
c. The ultrasound audio is generated from the rear panel speaker.
d. The recorder prints a continuous line at the set value ± 3 BPM on the top grid of the strip chart paper.
11. Turn the monitor and the PS320 simulator off. Disconnect the ultrasound transducer from the monitor and
connect it to the second US connector (US2) on the monitor unit and then turn the monitor unit and PS320
simulator on. Repeat steps 6 to 9 using the second ultrasound channel (The mode will show US2).
12. Disconnect the ultrasound transducer from the monitor unit. Confirm the following on the monitor display
and the recorder:
a. The FHR1 value is blank and the mode shows INOP.
b. The recorder stops printing the fetal heart rate trace.
c. The recorder prints CARDIO INOP on the center margin of the strip chart paper after approximately 20
seconds.
3.3.4.9 Uterine Activity Input Check
NOTE: The instructions in this procedure are based on the use of Fluke® PS320 simulator. Refer to Appendix G
for CorometricsTM 325 simulator use instructions.
1. Make sure the monitor and the PS320 simulator are both turned off.
2. Connect the TOCO cable (Fluke® Part number: 2462519) to the UA input connector of monitor unit and the
TOCO connector of the PS320 simulator.
3. Turn on the PS320 simulator and the monitor unit.
© 2013 by General Electric Company. All rights reserved.
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4. Use the Trim Knob Control of the monitor to go to Service Mode and access the Install Options Screen 2 and
set Pressure units to mmHg.
5. Take a note of the Default TOCO Reference value.
NOTE: The monitor is shipped from the factory with the Default TOCO Reference value set at 10 mmHg (1.3
kPa). However, your monitor may have been custom configured.
6. Exit the Service Mode by selecting Restart at the bottom of the screen.
7. Make sure the monitor recorder is on. Depress the Record Button on the monitor front panel to turn the
recorder on if necessary.
8. Briefly press the UA Reference Button on the monitor. Confirm the following on the monitor display and the
recorder:
a. The UA mode shows TOCO.
b. The UA value reflects the value of Default TOCO Reference.
c. The recorder prints a continuous line at the default value on the uterine activity channel of the strip
chart paper.
d. The recorder prints UA REF on the strip chart paper.
9. Press and hold the UA Reference Button on the monitor to cycle through the available selections for UA
reference: 5,10, 15, 20, or 25 relative units in mmHg mode. Confirm that the correct UA value is displayed
on the monitor and that the recorder prints a continuous line at the corresponding value on the uterine
activity channel of the strip chart paper.
10. Set the TOCO amplitude to 5μV and TOCO Level at each of the level settings: 0, 20, 40, 60, 80 and 100
relative units in the PS320 simulator. Confirm that the correct UA value is displayed on the monitor and that
the recorder prints a continuous line at the corresponding value on the heart rate channel of the strip chart
paper.
NOTE: For PS320 simulator setup information, see Appendix D.
11. Disconnect the TOCO cable from the monitor and simulator. Connect the IUP cable (Fluke® Part Number:
2462469) from TOCO connector in PS320 Simulator to the UA connector of the monitor.
12. Set the TOCO Level to 0 mmHg/kPa. Depress the UA Reference Button on the monitor. Confirm on the
monitor and recorder display that:
a. The UA value shows 0.
b. The UA mode shows IUP.
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Chapter 3: Maintenance and Checkout
c. The recorder prints a continuous line at 0 mmHg on the uterine activity channel of the strip chart paper.
d. The recorder prints UA REF on the strip chart paper.
13. Set the simulator TOCO amplitude to 5μV and TOCO Level at each of the level settings: 0, 20, 40, 60, 80 and
100 mmHg. Look at the monitor display/recorder and confirm that the UA value is displayed accordingly
and that the recorder prints a continuous line at the corresponding value on the uterine activity channel of
the strip chart paper.
14. Disconnect the IUP cable from the UA input connector on the front panel of the monitor. Confirm the
following on the monitor display and the recorder:
a. The UA value is blank and the mode shows INOP.
b. The recorder stops printing the uterine activity trace.
c. The recorder prints UA INOP on the center margin of the strip chart paper after approximately 20
seconds.
3.3.5 Pattern Memory Check
NOTE: The instructions in this procedure are based on the use of Fluke® PS320 simulator. Refer to Appendix G
for CorometricsTM 325 simulator use instructions.
1. Make sure the monitor and the PS320 simulator are both turned off.
2. Connect the FECG and TOCO cables (orderable through GE part number: 2025177-055 and Fluke® Part
number: 2462519) to the corresponding connectors of the monitor and the PS320 simulator (See Appendix
D).
3. Turn on the PS320 simulator and the monitor unit.
4. Use the PS320 simulator front panel to select FETAL PATTERNS by repeatedly pressing MAIN Button.
5. Select TREND 1 from the Menu by pressing the SUB Button on the PS320 simulator and press ENTER after
selecting the TREND 1 pattern. The simulator starts to change the fetal heart rate and uterine activity
values up and down.
NOTE: For PS320 simulator setup information, see Appendix D .
6. Make sure the monitor recorder is on. Depress the Record Button on the monitor unit front panel to turn the
recorder on if necessary.
7. Confirm that the monitor recorder prints out a value equal to that displayed on the monitor for FHR and UA
parameters.
© 2013 by General Electric Company. All rights reserved.
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3.3.5.1 Dual Heart Rate Check (FECG/US Modes)
NOTE: The instructions in this procedure are based on the use of Fluke® PS320 simulator. Refer to Appendix G
for CorometricsTM 325 simulator use instructions.
NOTE: Two PS320 simulators are required to perform this check. One PS320 simulator is used for providing
FECG signal and the other one is used for providing the ultrasound signal.
1. Make sure the monitor and the PS320 simulators are both turned off.
2. Connect a Y adapter cable (GE Part number: 1442AAO) to the monitor and then connect the 3-Lead FECG
cable (orderable through GE part number: 2025177-055) to the FECG connector of the Y adapter and the
left panel terminals of the PS320 simulator as per below connection diagram:
3-Lead ECG Cable Terminal Name
PS320 Simulator - Left Panel Terminal
Left Leg (LL)
shall be connected to
Fet/Mat
Right Arm (RA)
shall be connected to
Fetal
Left Arm (LA)
shall be connected to
Reference
3. Connect a GE-approved ultrasound transducer to the US input connector of the monitor and connect the
Fluke® mechanical fetal heart (MFH-1) to the US1 port of the second PS320 simulator.
4. Turn on the two PS320 simulators and the monitor.
5. Use the first PS320 simulator front panel to set the Fetal ECG parameters Fetal (Rate) to 120 BPM and
Amplitude to 50µV.
NOTE: For PS320 simulator setup information, see Appendix D .
6. Place the simulation window of the mechanical fetal heart connected to second PS320 over the ultrasound
transducer and then use the PS320 simulator front panel to set the ultrasound (US1 Port) parameters Fetal
(Rate) to 150 BPM and Amplitude to 50µV.
7. Make sure the monitor recorder is on. Depress the Record Button on the monitor front panel to turn the
recorder on if necessary.
8. Confirm the following on the monitor display and the recorder:
a. The FHR1 mode shows FECG.
b. The FHR1 value shows 120 ± 1.
c. The FHR1 heartbeat indicator ( ♥ ) flashes at a rate of 120 times per minute.
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Chapter 3: Maintenance and Checkout
d. The FHR2 heartbeat indicator ( ♥ ) flashes at a rate of 150 times per minute.
e. The FHR2 mode shows US.
f. The recorder prints the messages FECG and US on the center margin of the strip chart paper.
g. The recorder prints a continuous plain black line on the 120 BPM mark on the heart rate channel of the
strip chart paper.
h. The recorder prints a bold black ramp trace on the 150 BPM mark on the heart rate channel of the strip
chart paper.
3.3.5.2 Dual Heart Rate Check (Dual Ultrasound Modes)
NOTE: Two ultrasound transducers are required to generate fetal heart rate signals to perform this check.
NOTE: This check can also be performed using two PS320 simulators. Do not perform this check using one
PS320 simulator and one ultrasound transducer.
1. Make sure the monitor unit is turned off.
2. Connect one ultrasound transducer to the US input connector and the other ultrasound transducer to the
US2 input connector of the monitor unit.
3. Turn on the monitor unit.
4. Make sure the monitor recorder is on. Depress the Record Button on the monitor unit front panel to turn the
recorder on if necessary.
5. Confirm the following on the monitor display and the recorder:
a. The FHR1 mode shows US.
b. The FHR2 mode shows US2.
c. The FHR1 value shows three steady dashes “– – –.”
d. The FHR2 value shows three steady dashes “– – –.”
e. The recorder prints US and US2 on the center margin of the strip chart paper.
6. Hold the ultrasound transducer connected to US input in your hand with the transducer front facing
the palm of your hand and use your other hand to gently press and depress the back of the transducer
rhythmically while maintaining a steady rate. Confirm the following:
a. The FHR1 value responds to the rubbing.
© 2013 by General Electric Company. All rights reserved.
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b. The FHR1 heartbeat indicator ( ♥ ) responds to the input.
c. The recorder prints the heart rate tracing corresponding to the rate and the trace is plain black.
7. Hold the ultrasound transducer connected to US2 input in your hand with the transducer front facing
the palm of your hand and use your other hand to gently press and depress the back of the transducer
rhythmically while maintaining a steady rate. Confirm the following:
a. The FHR2 value responds to the rubbing.
b. The FHR2 heartbeat indicator ( ♥ ) responds to the input.
c. The recorder prints the heart rate tracing corresponding to the rate and the trace is bold black.
3.3.6 NIBP Calibration Check
This procedure provides instruction to verify the accuracy of the NIBP circuitry, perform calibration if
necessary, and check the NIBP pneumatic circuit plumbing for leaks. Refer to section 4.4.1 for detailed
information.
3.3.7 Electrical Safety Tests
This section provides instructions to check if potential electrical health hazards to the patient or the operator of
the monitor unit exist.
Use an electrical safety analyzer and follow the operating instructions supplied by the manufacturer of the
safety analyzer to set up and perform the electrical safety tests.
NOTE: For reliable leakage current checks, perform the Ground Resistance Check first.
3.3.7.1 Power Outlet Check
This procedure checks the condition of the power outlet (wall outlet) from which the monitor gets power to
ensure correct results from leakage tests. Use a multimeter to ensure the power outlet is wired properly. If
other than normal polarity and ground is indicated, corrective action must be taken before proceeding. The
results of the following tests will be meaningless unless a properly wired power outlet is used.
3.3.7.2 Ground Resistance Check
Perform this check on the monitor unit only, with no other equipment (peripherals) attached.
1. Connect the monitor power cord to the safety analyzer.
2. Verify that the AC power cord of the safety analyzer is plugged into an appropriate wall outlet.
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Chapter 3: Maintenance and Checkout
3. Turn on the safety analyzer and set it to measure the ground resistance.
4. Measure the resistance between the ground (earth) terminal of the Power Inlet Module and the
Equipotential Lug on the rear side of the monitor unit. The resistances shall be 100mΩ or less.
3.3.7.3 Ground (Earth) Leakage Current and Enclosure Leakage Current Checks
Perform this check on the monitor unit only, with no other equipment (peripherals) attached.
1. Connect the monitor power cord to the safety analyzer.
2. Verify that the AC power cord of the safety analyzer is plugged into an appropriate wall outlet.
3. Turn on the safety analyzer and set it to measure the ground leakage current.
4. Turn on the monitor unit.
5. In normal conditions and in all possible operating modes, the ground leakage current shall be 300 μA or
less.
6. If required by local ordinances, in single-fault conditions and in all possible operating modes, the ground
leakage current shall be 500 μA or less.
7. Set the safety analyzer to measure the enclosure (chassis) leakage current (Use the Equipotential Lug in the
rear side of the monitor for the chassis connection of the safety analyzer).
8. In normal conditions and in all possible operating modes, the enclosure leakage current shall be 100 μA or
less.
9. If required by local ordinances, in single-fault conditions and in all possible operating modes, the enclosure
leakage current shall be 300 μA or less.
3.3.7.4 Patient-to-Ground (Patient Source) and Patient-to-Line (Patient Sink) Leakage Current Checks
Perform this check on the monitor unit only, with no other equipment (peripherals) attached. Table 3-1 lists the
maximum allowable patient (source/sink) leakage currents for different applied parts.
1. Connect an ECG test body (e.g. ECG cable with all its leads shorted together) to the ECG input of the monitor.
2. Connect the monitor power cord to the safety analyzer.
3. Verify that the AC power cord of the safety analyzer is plugged into an appropriate wall outlet.
4. Attach the External clamp of the safety analyzer to the test body.
5. Turn on the safety analyzer and configure it to measure the patient (source/sink) leakage currents.
© 2013 by General Electric Company. All rights reserved.
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6. Turn on the monitor unit.
7. In normal conditions and in all possible operating modes, the patient leakage currents shall be 10 μA or less.
8. If required by local ordinances, in single-fault conditions and in all possible operating modes, the patient
(source/sink) leakage currents shall be 50 μA or less.
9. Disconnect the ECG test body from the monitor. Connect an US test body (e.g. Ultrasound transducer
wrapped in aluminum foil) to the US input of the monitor and repeat steps 2 to 5. The patient (source/sink)
leakage currents shall be 100 μA or less in normal conditions (all possible operating modes) and 500 μA or
less in single-fault conditions (all possible operating modes).
10. Disconnect the US test body from the US input and connect it to the US2 input of the monitor and repeat
steps 2 to 5. The patient (source/sink) leakage currents shall be 100 μA or less in normal conditions (all
possible operating modes) and 500 μA or less in single-fault conditions (all possible operating modes).
11. Disconnect the US test body from the US2 input. Connect an SpO2 test body (e.g. SpO2 sensor wrapped in
aluminum foil) to the MSpO2 input of the monitor and repeat steps 2 to 5. The patient leakage currents shall
be 100 μA or less in normal conditions and 500 μA or less in single-fault conditions.
12. Disconnect the SpO2 test body from the monitor. Connect an IUP or TOCO test body (e.g. IUP or TOCO
transducer wrapped in aluminum foil) to the UA input of the monitor and repeat steps 2 to 5. The patient
leakage currents shall be 100 μA or less in normal conditions and 500 μA or less in single-fault conditions.
Table 3-3: Maximum allowable patient leakage currents for applied parts of Coro250cx series monitor
Applied Part
FECG
CF
MECG
Maximum Allowable Leakage Current (a.c.) (µA)
Normal condition
Single-fault condition
10
50
Defib-CF
10
50
US1, US2
BF
100
500
SpO2
BF
100
500
BF
100
500
NIBP
Defib-BF
100
500
Temperature
BF
100
500
Fetal Acoustic
Stimulator
BF
100
500
UA
54
Part Type
(per IEC 60601-1)
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© 2013 by General Electric Company. All rights reserved.
Chapter 4: Calibration
This chapter includes calibration procedures required for CorometricsTM 250cx series monitor repair, or
maintenance. These procedures must be performed by authorized service personnel.
Each CorometricsTM 250cx Series monitor is calibrated in the factory prior to shipment to the customer and so
no calibration is required upon the installation of the monitor unit.
4.1 Calibration Schedule
Table 4-1 lists the calibration procedures, specifies when and how often each procedure should be performed,
and provides the approximate time that it takes to perform each procedure.
For good care and maintenance of the CorometricsTM 250cx series product, perform calibration procedures at
specific time intervals.
Table 4-1: Calibration Procedures Schedule
To Be Performed as
Checkout after any
service
Approximate Time
To Be Performed as
Planned Maintenance
NIBP Calibration Check
8 minutes
Annually
As needed*
Recorder Photosensors Check
5 minutes
As needed
As needed**
Recorder Calibration (offsets) Check
2 minutes
Annually
As needed**
Procedure Name
*NIBP calibration check shall be performed after repair or replacement procedures related to NIBP subsystem of the monitor.
** Recorder photosensors check and calibration (offsets) check shall be performed after repair or replacement procedures related to
recorder assembly of the monitor.
WARNING:
Do not service the CorometricsTM 250cx series unit while it is in clinical use.
CAUTION:
Table 4-1 shows the minimum frequencies required for maintenance. Always follow hospital and
local regulations for required frequencies.
© 2013 by General Electric Company. All rights reserved.
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4.2 Environmental Requirements
The system shall be installed, serviced, and operated within the environmental conditions described in section
A.1.
4.3 Tool Requirements
The following table lists the service tools required to perform the calibration procedures:
Table 4-2: Tool Requirements for Calibration Procedures
Procedure Name
Service Tools Needed (QTY)
Adult Cuff (1), 3” rigid Cylinder (1), Standard 12-foot NIBP hose (1),
NIBP Calibration Check
External Manometer (1), capable of reading to 350mmHg (46.7 kPa),
Hand Pump Bulb (1)
Recorder Photosensors Check
Multimeter (1)
Recorder Calibration (offsets) Check Standard service tools
NOTE: Do not use a DNI CuffLink to perform the calibration procedures.
4.4 Calibration Procedures
4.4.1 NIBP Calibration Check
This section provides instruction to verify the accuracy of the NIBP circuitry, perform calibration if necessary,
and check the NIBP pneumatic circuit plumbing for leaks. Any NIBP calibration check procedure consists of a
sequence of sub-procedures:
a. Calibration Verification
b. Transducer Calibration
c. Overpressure Detection
d. System Leakage
The sequence starts with Calibration Verification. If Calibration Verification shows that the NIBP transducers are
out of calibration then Transducer Calibration shall be performed. Perform Overpressure Detection and System
Leakage only after NIBP transducers have been shown to be in calibration.
To set up the system and tools for calibration procedures (See Figure 4-1):
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Chapter 4: Calibration
1. Wrap an adult cuff around a 3” rigid cylinder.
2. Connect a standard 12-foot NIBP hose between the cuff and the monitor.
3. If hand inflation is needed, connect a hand pump bulb between the cuff and the NIBP hose.
4. Access the NIBP Calibration screen by navigating to Install Screen Options 1 in the service mode and then
selecting Tests softkey. Select NIBP Cal in the Diagnostics Control screen.
NOTE: The external manometer must read pressure in the same scale (mmHg or kPa) as the monitor. Settings
can be changed on the monitor Pressure Units to match the unit setting on the manometer.
Figure 4-1 NIBP Calibration Check Setup
4.4.1.1 Calibration Verification
1. Use the Trim Knob Control to set Mode to Verify in the NIBP Calibration screen. The monitor will inflate the
cuff to approximately 200 mmHg.
2. Confirm that the PT1 and PT2 pressure values shown on the monitor display are within the “pass” range of
external manometer reading ± 2 mmHg (0.3 kPa) . If the pressure values are not within the “pass” range,
perform the Transducer Calibration sub-procedure.
© 2013 by General Electric Company. All rights reserved.
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NOTE: To stop Calibration Verification select Done, which appears after the Verify softkey has been pressed.
The monitor will vent pressure to atmosphere and re-zero the transducers.
4.4.1.2 Transducer Calibration
1. Use the Trim Knob Control to set Mode to Calibrate in the NIBP Calibration screen. The monitor will inflate
the cuff to approximately 200 mmHg.
2. Once the pressure has stabilized, use the Trim Knob Control to enter the pressure from the external
manometer in the External field.
NOTE: Best accuracy is achieved if the system is given a short time to settle. Best accuracy is achieved if the
system pressure is at or near 200 mmHg (26.7 kPa). The monitor will vent pressure to atmosphere and
re-zero the transducers after Trim Knob Control is pressed to enter the pressure value in the External
field.
3. Perform Calibration Verification and then repeat steps 1-3 if Calibration Verification fails.
4. Commit the new calibration factors by selecting Store Calibration in the NIBP Calibration screen.
NOTE: Between entering the external pressure and committing the new calibration factors the Exit menu item
will display as Exit – No Store to indicate current calibration factors will be lost if Service Mode is exited
prior to selecting Store Calibration.
NOTE: The menu item Store Calibration will only display after Calibration Verification has been performed
during the Calibration procedure.
4.4.1.3 Overpressure Detection
1. Use the Trim Knob Control to set Mode to OVP Test in the NIBP Calibration screen. The monitor will close the
valves.
2. Use the hand pump bulb to inflate the system until the monitor detects an overpressure condition. When
approaching the overpressure trip point, inflate the system slowly.
NOTE: Upon detection of an overpressure condition, the monitor will vent pressure to the atmosphere and
re-zero the transducers. The monitor displays the maximum detected pressure near the bottom of the
NIBP Calibration screen.
3. If the overpressure condition occurs when the external manometer reading is outside of 300 - 330 mmHg
(40.0 - 44.0 kPa) range, perform Calibration Verification and Transducer Calibration. Then repeat steps 1-2.
Contact service if the overpressure condition still occurs outside of 300 - 330 mmHg (40.0 - 44.0 kPa) range.
4.4.1.4 System Leakage
1. Use the Trim Knob Control to set Mode to Leak Test in the NIBP Calibration screen.
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Chapter 4: Calibration
NOTE: Make sure you have the 12-foot hose and the cuff tightly wrapped around a rigid 3” cylinder. This air
volume is required to properly test the leakage rate.
NOTE: To perform the leakage test, the monitor will inflate to approximately 200 mmHg (26.7 kPa), allow 45
second of settling time, then take two pressure readings (30 seconds apart) to calculate the system
leakage rate, and eventually vent pressure to the atmosphere. The system leakage rate and PASS or
FAIL result will be displayed on the screen.
2. Upon completion of the test, confirm that the monitor displays the leakage rate and PASS near the bottom
of the NIBP Calibration screen.
NOTE: System leakage rate shall be no more than 6 mmHg (0.8 kPa) per minute. If the monitor has a leakage
rate more than 6mmHg (0.8 kPa) per minute, inspect the external and internal pneumatic hoses, valves,
connectors for loose connection and or leaks.
4.4.2 Recorder Photosensors Check
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
4.4.2.1 Paper-Low Photosensor Adjustment
1. Remove the top cover of the monitor as instructed in section 6.1.
2. Load the recorder with GE-approved strip chart paper. Make sure that there are no black squares showing.
3. Turn on the monitor unit.
4. Press the Record Button on the monitor front panel to turn on the recorder. Allow the paper to advance for
a few seconds in order to tension the paper.
5. Turn off the recorder.
6. Set a multimeter to measure DC voltage and connect its positive lead to Pin 4 of J9 and the negative lead
to Pin 2 of J9 on the recorder board.
7. Confirm that the multimeter reads a DC voltage of +150 ± 2 mVDC. Adjust R31 on the recorder board, if
necessary, to set the voltage to be within the acceptable range.
NOTE: If you open and then close the recorder door, the DC voltage reading may vary 5–10 mV due to the loss
of tension in the paper. This is acceptable and you do not need to re-adjust.
8. Open the recorder door and verify that the reading on the multimeter is greater than +4.75 VDC.
© 2013 by General Electric Company. All rights reserved.
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9. To create a paper-low condition, re-load the paper so that black squares show on the surface (i.e., the last
several sheets of a pack).
10. Turn on the recorder.
11. The value on the multimeter shall go up and down as the paper surface alternates between black and
white. Verify that the maximum value is greater than or equal to 2.0 VDC.
12. Turn off the recorder.
4.4.2.2 Paper-Out Photosensor Adjustment
1. Remove the top cover of the monitor as instructed in section 6.1.
2. Load the recorder with GE-approved strip chart paper. Make sure that there are no black squares showing.
3. Turn on the monitor unit.
4. Press the Record Button on the monitor front panel to turn on the recorder. Allow the paper to advance for
a few seconds in order to tension the paper.
5. Turn off the recorder.
6. Set a multimeter to measure DC voltage and connect its positive lead to Pin 3 of J9 and the negative lead
to Pin 2 of J9 on the recorder board.
7. Confirm that the multimeter reads a DC voltage of +150 ± 2 mVDC. Adjust R29 on the recorder board, if
necessary, to set the voltage to be within the acceptable range.
NOTE: If you open and then close the recorder door, the reading may vary 5–10 mV due to the loss of tension
in the paper. This is acceptable and you do not need to re-adjust.
8. Open the recorder door and verify that the reading on the multimeter is greater than +4.75 VDC.
4.4.2.3 Paper-Load Photosensor Adjustment
1. Remove the top cover of the monitor as instructed in section 6.1.
2. Load the recorder with GE-approved strip chart paper. Make sure that there are no black squares showing
and the recorder is loaded with at least nine sheets of strip chart paper.
3. Turn on the monitor unit.
4. Set a multimeter to measure DC voltage and connect its positive lead to Pin 6 of J9 and the negative lead
to Pin 2 of J9 on the recorder board.
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5. Confirm that the multimeter reads a DC voltage of 190 ± 5 mVDC. Adjust R41 on the recorder board, if
necessary, to set the voltage to be within the acceptable range.
4.4.3 Recorder Calibration (offsets) Check
1. Load the monitor recorder with GE-approved strip chart paper.
2. Turn the monitor on.
3. Use the Trim Knob Control to access the Diagnostic Control screen and set the Recorder Calibration into On
and press the Trim Knob Control to select it. Run the test for at least 10 seconds.
4. Confirm that the first horizontal trace is printed 0.49” ± 0.002” from the right hand edge of the paper. If
the trace does not fall within the specified offset range, perform the recorder vertical offset adjustment as
instructed in section 5.11.1.
5. Confirm the recorder paper does not curls to one side and the vertical lines are printed with equal weight
from one end to the other with no dots missing along the vertical trace. If not, perform the recorder
horizontal offset adjustment as instructed in section 5.11.2.
Figure 4-2 Horizontal and Vertical Traces on Strip Chart Paper
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Chapter 5: Diagnostics and Troubleshooting
This chapter lists some of the major symptoms of CorometricsTM 250cx Series monitors as well as the possible
causes and solutions. For any necessary part replacements or adjustments, follow the instructions provided in
See Chapter 6. Always read all the warnings, cautions, notes, and other information provided in the “Important
Safety Information” section before starting any troubleshooting.
NOTE: For each symptom, the possible causes are listed in a certain sequence to provide a quick and effective
troubleshooting guide. Therefore, investigate the possible causes of each symptom in order from top to
bottom to find the root cause of the symptom.
NOTE: The ID column in troubleshooting tables is only created for the purpose of simplifying symptoms
referencing throughout the manual.
5.1 General Troubleshooting Table
ID
S1.1
General Troubleshooting Table
Symptom Description
Possible Causes
No monitoring functions and Power Indicator
does not illuminate when the monitor unit is
turned on (Power Switch is placed in the On (I)
position).
© 2013 by General Electric Company. All rights reserved.
Actions and Solutions
Confirm that the power
Power cord is not
cord is plugged into
properly connected to the
the power outlet and
monitor unit or the power
securely connected to
outlet.
the monitor unit.
Confirm that power is
No power at the outlet.
available at the power
outlet.
Disconnect the power
cord from the unit and
Power cord is defective.
outlet and inspect for any
damages. Replace the
power cord if necessary.
Remove the top cover
Fuses are open (defective) and check if the fuse is
or missing.
open. If yes, replace the
power supply.
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Chapter 5: Diagnostics and Troubleshooting
ID
General Troubleshooting Table
Symptom Description
Possible Causes
Date and time are set
incorrectly.
S1.2
The monitor shows incorrect date and time.
The timekeeping RAM
chip (U30) on the main
board is defective.
The main board is
defective.
Audio volume is set too
low.
S1.3
The monitor does not generate any
heartbeats or pulse sounds.
The transducer is not
connected or is loosely
connected.
Inadequate ultrasound
gel is used.
The recorder is off or out
of paper.
S1.4
S1.5
64
When the monitor is turned on, the recorder
does not function and the Record Indicator is
off.
When the monitor is turned on, the recorder
does not function and the Record Indicator
is off and the message PAPER INCORRECTLY
LOADED, RELOAD WITH BLACK SQUARES
DOWN is shown in maternal waveform area.
2036947-001
Paper-out photosensor is
out of calibration.
Paper-out photosensor
(on the left hand
side of the recorder)
is disconnected or
defective.
Paper is loaded
backwards in the
recorder.
Actions and Solutions
Access the General Setup
screen to set the time
and date.
Replace the timekeeping
RAM chip (See section
6.1).
Replace the main board.
Press the Volume buttons
or access the respective
setup screen(s) (FECG, US,
or US2) to increase the
volume.
Ensure that the
transducer is securely
attached to monitor and
applied to the patient.
Apply adequate
ultrasound gel.
Make sure GE-approved
paper is installed in the
recorder. Press the Record
button.
Perform the recorder
photosensors check
(See section 4.4.2).
Confirm the paper-out
photosensor cable is
connected properly to
the recorder and the
recorder board. Replace
the photosensor if the
symptom persists (See
section 6.20).
Re-install the paper in the
recorder.
© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
General Troubleshooting Table
ID
Symptom Description
Possible Causes
Actions and Solutions
Paper supply in recorder Install a new pack of
is low or paper incorrectly GE-approved paper in the
loaded.
recorder.
Perform the recorder
Paper-low photosensor is
photosensors check
out of calibration.
(See section 4.4.2).
When the monitor is turned on, the recorder
Confirm the paper-low
S1.6 functions but the Record Indicator flashes on
photosensor cable is
and off every second.
Paper-low photosensor
connected properly to
(on the right hand
the recorder and the
side of the recorder)
recorder board. Replace
is disconnected or
the photosensor if the
defective.
symptom persists (See
section 6.20).
Check if the recorder
stepper motor does
The recorder stepper
stepping. Replace
When the monitor is turned on, the recorder
motor is defective.
the stepper motor if
S1.7 does not function and the Record Indicator is
necessary.
on.
Recorder roller is
Replace the recorder
defective.
assembly.
When the monitor is turned on, SYSTEM
The main board flash
S1.8 FAULT:ROM error message appears on the
Replace the main board.
memory is defective.
display.
When the monitor is turned on, SYSTEM
The main board SRAM
S1.9 FAULT:RAM error message appears on the
Replace the main board.
memory is defective.
display.
Restart the monitor and
check the CPU software
version of the monitor.
When the monitor is turned on, SYSTEM
Upgrade software if
S1.10 FAULT:ALERT error message appears on the
Software error
necessary (See Appendix
display.
F). If the software is upto-date and the symptom
still exists, replace the
main board.
Communication problem
Make sure the interexists between the main
connect cable is securely
When the monitor is turned on, SYSTEM
board and the UI keypad
connected.
S1.11 FAULT:UI KEYPAD error message appears on
board.
the display.
UI keypad board is
Replaced the UI keypad
defective.
board.
© 2013 by General Electric Company. All rights reserved.
2036947-00165
Chapter 5: Diagnostics and Troubleshooting
ID
General Troubleshooting Table
Symptom Description
Possible Causes
SW1 switch #7 is
incorrectly set.
When the monitor is turned on, SYSTEM
S1.12 FAULT:SOFTWARE error message appears on
the display.
When the monitor is turned on, SYSTEM
S1.13 FAULT:DEFAULTS error message appears on
the display.
When the monitor is turned on, SYSTEM
S1.14 FAULT:DSP error message appears on the
display.
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Actions and Solutions
Disable SW1 switch #7.
Software error
Restart the monitor and
check the CPU software
version of the monitor.
Upgrade software if
necessary (See Appendix
F). If the software is upto-date and the symptom
still exists, replace the
main board.
Main board is defective.
Replace the main board.
DSP board is defective.
Replace the DSP board.
© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
5.2 Ultrasound Troubleshooting Table
ID
Ultrasound Troubleshooting Table
Symptom Description
Possible Causes
The monitor does not show the fetal heart rate
S2.1 properly on the display when the ultrasound
transducer is connected to the monitor.
© 2013 by General Electric Company. All rights reserved.
Actions and Solutions
Confirm that the
Ultrasound transducer is
transducer is securely
not properly connected
connected to the monitor
to the monitor unit.
unit.
Reposition the transducer
Ultrasound transducer is
and wait for a few
not properly positioned
seconds before moving
on the patient.
the transducer.
Check the ultrasound gel
Too little ultrasound gel is
applied to the transducer
applied to the ultrasound
and apply more if
transducer.
necessary.
Check the ultrasound
transducer functionality
The ultrasound
as per instructions in
transducer is defective.
section 3.3.3.1. Replace
the transducer if
necessary.
Ultrasound signal cannot
be captured due to one of
the following conditions:
a) Active fetus or mother Use an alternate
b) Fetal arrhythmia or
technique to capture FHR.
hiccups
c) Extreme maternal
obesity
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Chapter 5: Diagnostics and Troubleshooting
ID
Ultrasound Troubleshooting Table
Symptom Description
Possible Causes
Inappropriate ultrasound
transducer used.
Environmental noise
S2.2 Static noise exist on the ultrasound signal
Active fetus
The ultrasound
transducer is defective.
Maternal movement
The FHR Rate shown on the display and the
S2.3 FHR trend on the strip chart paper do not
correlate.
The paper scale is
incorrectly configured to
either 50-210 bpm or 30240 bpm.
The tone volume is set
low.
S2.4 The volume of the ultrasound tone is low.
The dual ultrasound
board is out of
calibration.
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Actions and Solutions
Use GE-approved
ultrasound transducers.
Do not use refurbished
transducers.
Keep sheets and gown off
transducer. Do not hold
transducer with hand.
Reposition the transducer
and wait for a few
seconds before moving
the transducer.
Check ultrasound
transducer functionality
as per instructions in
section 3.3.3.1. Replace
the transducer if
necessary.
Use an alternate
technique to capture FHR.
Access Install Options
Screen 1 screen and
set the paper scaling to
match the type of paper
used.
Use the Volume Buttons
on the monitor to
increase the volume of
the ultrasound tone.
Contact service for
calibrating the dual
ultrasound board
OR order a new dual
ultrasound board and
replace it.
© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
5.3 FECG Troubleshooting Table
FECG Troubleshooting Table
ID
Symptom Description
Possible Causes
FECG cable is not
properly connected to the
monitor unit.
Attachment pad or leg
plate is not securely
attached to the patient.
Internal FECG parameter is shown erratically
S3.1
Electrode wire is not
or not being recorded properly.
secure in the leg plate
post.
Electrode is defective or
not properly attached.
Attachment pad is
defective.
The FHR Rate shown on the display and the
S3.2 FHR
trend on strip chart paper do not correlate.
© 2013 by General Electric Company. All rights reserved.
Paper Scale is incorrectly
configured to either 50210 bpm or 30-240 bpm.
Actions and Solutions
Confirm that the cable
is securely connected to
the monitor unit.
Confirm the pad or the
leg plate is securely
attached to the patient.
Confirm the leg plate
connection in the leg
plate post is secure.
Check the electrode and
replace it if necessary.
Check the pad and
replace it if necessary.
Access Install Options
Screen 1 screen and
set the paper scaling to
match the type of paper
used.
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Chapter 5: Diagnostics and Troubleshooting
5.4 External Uterine Activity Troubleshooting Table
ID
External Uterine Activity Troubleshooting Table
Symptom Description
Possible Causes
S4.1
The TOCO transducer is not recording the
contractions.
S4.2
Flashing “+” sign appears in the UA field on the
screen.
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Actions and Solutions
Confirm that the
TOCO transducer is not
transducer is securely
properly connected to the
connected to the monitor
monitor unit.
unit.
TOCO transducer is not
Reposition the transducer
properly positioned on
and confirm it is securely
the patient.
applied to the patient.
Loosen belts or remove
transducer from patient.
Press UA Reference
button while no pressure
UA reference range
is applied to transducer
exceeded.
button. Re-apply
transducer. Do not overtighten the belt. Press UA
Reference button again
between contractions.
Securely apply the TOCO
No maternal contractions transducer to the patient
exist.
and wait for maternal
contractions.
Check the TOCO
transducer functionality
The TOCO transducer is
as per instructions in
defective.
section 3.3.3.2. Replace
the transducer if
necessary.
Press the UA Reference
Relative pressure is more
button between the
than 100.
contractions.
The UA board is defective. Replace the UA board.
© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
ID
External Uterine Activity Troubleshooting Table
Symptom Description
Possible Causes
UA Reference button is
pressed before the UA
circuitry is stabilized.
CHECK TOCO message is shown in UA area of
S4.3 the display when the UA
Reference button is pressed.
UA reference range
exceeded because the
belt is over-tightened.
The TOCO transducer is
defective.
UA board is defective.
© 2013 by General Electric Company. All rights reserved.
Actions and Solutions
Make sure to wait ten
seconds following
powering on the monitor
and/or connecting the
transducer to the UA
connector.
Loosen the belt or
remove the transducer
from patient. Press UA
Reference button while
no pressure is applied to
the transducer button.
Re-apply transducer. Do
not over-tighten belt.
Press UA Reference
button again between the
contractions.
Check the TOCO
transducer functionality
as per instructions in
section 3.3.3.2 Replace
the transducer if
necessary.
Replace the UA board.
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Chapter 5: Diagnostics and Troubleshooting
5.5 Internal Uterine Activity Troubleshooting Table
ID
Internal Uterine Activity Troubleshooting Table
Symptom Description
Possible Causes
Actions and Solutions
Confirm that the
The transducer is not
transducer is securely
properly connected to the
connected to the monitor
monitor unit.
unit.
Air bubble exists in the
Flush the dome and the
dome or the catheter is
catheter.
blocked.
Internal pressure parameter is not being
Inspect the dome for
S5.1
measured correctly.
Dome is cracked.
damages and replace it if
necessary.
Catheter has fallen out of Inspect the catheter and
place.
replace it if necessary.
Catheter or strain gauge Calibrate catheter or
is not zeroed.
strain gauge.
UA board is defective.
Replace the UA board.
Flush the catheter and
Blockage exists in fluidRe-zero. Replace the
filled catheter.
catheter if necessary.
CHECK IUP message is shown in UA area of the Fetus is pressing directly Reposition by twisting the
S5.2
display.
on the catheter.
catheter.
Check the catheter
The catheter is defective. functionality. Replace the
transducer if necessary.
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© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
5.6 MECG Troubleshooting Table
MECG Troubleshooting Table
ID
Symptom Description
Possible Causes
Actions and Solutions
The cable is not properly Confirm that the cable
connected to the monitor is securely connected to
unit.
the monitor unit.
Check electrodes and reElectrode gel is dried.
apply gel if necessary.
Electrodes are not
Re-apply electrodes.
properly placed.
MECG parameter is shown erratically or not
S6.1
being properly recorded.
Clips are not attached to
Check clip attachments.
electrodes properly.
Selected lead is providing Change lead selection on
inadequate signal.
MHR/P Setup screen.
The MECG cable is
Inspect the cable and
defective.
replace it if necessary.
MECG board is defective. Replace the MECG board.
Confirm that the patient
Monitor is unable to make
is not asystolic and the
a determine MECG due to
Dashes (– – –) are shown in MHR/P area of the
electrodes are firmly
S6.2
insufficient signal.
display.
secured to the patient.
MECG board is defective.
Replace the MECG board.
5.7 Blood Pressure Troubleshooting Table
ID
Blood Pressure Troubleshooting Table
Symptom Description
Possible Causes
S7.1 High reading
© 2013 by General Electric Company. All rights reserved.
Measurement is
taken during uterine
contraction.
Actions and Solutions
Annotate chart, then take
a manual reading inbetween contractions. If
possible, cancel reading
during contraction.
Enable the monitor’s
Smart BP feature.
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Chapter 5: Diagnostics and Troubleshooting
ID
S7.2
S7.3
S7.4
S7.5
S7.6
S7.7
74
Blood Pressure Troubleshooting Table
Symptom Description
Possible Causes
Actions and Solutions
Reposition the cuff and
Improper cuff position or
confirm that the cuff is
loose cuff.
properly tightened.
Restrict patient limb
Maternal movement
movement. Restrain limb
if necessary.
CHECK CUFF message is shown in NIBP area of
Hose is not properly
Make sure that hose is
the display.
connected to monitor (air firmly attached to the
pressure error).
monitor.
Confirm that an adult
Neonatal cuff is used for
cuff is used for the
the measurement.
measurement.
NIBP board is defective.
Replace the NIBP board.
Restrict patient limb
Cuff pressure has
movement. If the
exceeded the
symptom still exists,
over-pressure limit of 315 the NIBP hose or the
OVERPRESSURE message is shown in NIBP area mmHg ± 15 mmHg.
NIBP board is defective.
of the display.
Contact service.
Check the external cuff
The hose is kinked.
for kinks.
The hose is blocked.
Perform pneumatic test.
Communication error
The NIBP board or the
COMM message is shown in NIBP area of the
exists between the builtmain board is defective.
display.
in NIBP module and the
Contact service.
monitor circuitry.
Restrict patient limb
MOTION message is shown in NIBP area of the Excessive maternal
movement. Restrain limb
display.
movement.
if necessary.
Reposition cuff. Ensure
the patient is not
Monitor is unable to
Dashes (– – –) are shown in NIBP area of the
arrhythmia and move
determine the blood
display.
cuff to another limb. If
pressure.
the symptom still exists,
contact service.
Replace the NIBP
NIBP Pump is defective.
pneumatic board.
REPAIR message is shown in NIBP area of the
The NIBP board or the
display.
System error or self-test
main board is defective.
failure.
Contact service.
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
Blood Pressure Troubleshooting Table
ID
Symptom Description
Possible Causes
Monitor is unable to
WEAK SIGNAL message is shown on the
determine the blood
S7.8
display.
pressure due to
insufficient signal.
Actions and Solutions
Assess patient situation.
5.8 Maternal Pulse Oximetry Troubleshooting Table
Maternal Pulse Oximetry Troubleshooting Table
ID
Symptom Description
Possible Causes
Communication error
COMM message is shown in MSpO2 area of the exists between the builtS8.1
display.
in MSpO2 module and the
monitor circuitry.
Actions and Solutions
The SpO2 module + carrier
board or the main board
is defective. Contact
service.
Ensure the sensor is
not too tight. Move
the sensor to another
location.
Restrict patient limb
Maternal movement.
movement. Restrain limb
if necessary.
Excessive ambient light
Cover the sensor with
exists.
opaque material.
Confirm that the
Monitor is unable to
intermediate cable is
determine the pulse
firmly attached to the
oximetry due to
monitor and to the sensor
insufficient signal.
assembly.
Use the same SpO2
The wrong SpO2 sensor is sensor type (Nellcor,
connected to the monitor. Masimo) that the monitor
supports.
Inspect the sensor and
The sensor is defective.
replace it if necessary.
The SpO2 module + carrier Replace the SpO2 module
board is defective.
+ carrier board.
Select Fast mode on
Normal mode is selected.
MSpO2 Setup screen.
The sensor is improperly
applied on the patient’s
finger.
S8.2
Dashes (---) are shown in MSpO2 area of the
display.
S8.3
MHR/P Pulse source is blank when MSpO2
is selected
© 2013 by General Electric Company. All rights reserved.
2036947-00175
Chapter 5: Diagnostics and Troubleshooting
Maternal Pulse Oximetry Troubleshooting Table
Symptom Description
Possible Causes
ID
S8.4
REPAIR message is shown in MSpO2 area of the
display. (Nellcor only)
The monitor does not show any MSpO2 value
S8.5 and SENSOR message appears below the
MSpO2 area of the display.
Actions and Solutions
Verify the settings of
SW1 switch on the main
board are correct. If the
System error or self-test symptom still exists, the
failure.
SpO2 module + carrier
board or the main board
is defective. Contact
service.
Use the same SpO2
The wrong SpO2 sensor is sensor type (Nellcor,
connected to the monitor. Masimo) that the monitor
supports
5.9 Main Board Troubleshooting – Voltage Checks
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Make sure the monitor is turned off.
2. Remove the top cover as instructed in section 6.1
3. Turn the monitor on.
4. Use a multimeter to measure and verify the below power supply voltages on J14 connector pins of the
main board. Use pin 8 of J14 as the ground (GND) for the voltage measurements. 76
J14 Pin Number
Signal Name
Acceptable Voltage Range
1
+12EL
+12 VDC ±0.5 VDC
2
+20I
+20 VDC ± 0.5 VDC
3
+15BP
+15 VDC ± 0.5 VDC
4
-15V
-15 VDC ± 0.5 VDC
5
+15V
+15 VDC ± 0.5 VDC
6
+12A
+12 VDC ± 0.5 VDC
7
+5V
+5 VDC ± 0.5 VDC
8
GND
--
9
No Connection
--
10
Keying
--
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
5.10 FECG/UA Board Troubleshooting – Voltage Adjustments
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Make sure the monitor is turned off.
2. Remove the top cover as instructed in section 6.1.
3. Remove the cage cover.
4. Turn the monitor on.
5. Set a multimeter to measure DC voltage. Connect the positive lead of the multimeter to TP1 and the
negative lead to TP2 or TP3 (isolated ground) on the FECG/UA board.
6. Confirm that the multimeter reads a DC voltage of +4.0V ± 0.01V. Adjust R28 if necessary.
5.11 Recorder Troubleshooting
5.11.1 Vertical Offset Adjustment
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
Follow below instructions to perform vertical offset adjustment if the recorder prints the horizontal traces with
offset, i.e. upon running the self-test routine or recorder calibration test, the first horizontal trace is outside the
acceptable range. The acceptable range is 0.49” ± 0.002” from the right hand edge of the paper.
1. Remove the top cover as instructed in section 6.1.
2. Turn on the unit and use the Trim Knob Control to go to Install Options Screen 1 and access Diagnostic
Control screen.
3. Use a small hex key to loosen the two set screws on both sides of the recorder assembly (See Figure 5-1).
© 2013 by General Electric Company. All rights reserved.
2036947-00177
Chapter 5: Diagnostics and Troubleshooting
4. Use a hex key to adjust the one hex-head screw (See Figure 5-2) on the right side of the recorder assembly
(the one lower hex-head screw on the side where stepper motor is attached)
5. Set the Recorder Calibration in the Diagnostic Control screen to On and press the Trim Knob Control to
select it. Run the test for at least 10 seconds and check if the first horizontal trace falls within the specified
acceptable range.
6. Set the Recorder Calibration to Off and press the Trim Knob Control to select it. Go back to step 4 to do
further adjustment if the first horizontal trace falls outside the specified acceptable range.
7. Turn off the monitor.
8. Tighten the two set screws on both sides of the recorder assembly (See Figure 5-1).
9. Re-install the top cover.
Figure 5-1
78
Figure 5-2
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
5.11.2 Horizontal Offset Adjustment
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
Use the Trim Knob Control to go to Install Options Screen 1 and access Diagnostic Control screen to run the
recorder calibration test. Follow below instructions to perform the horizontal offset adjustment if any of the
following symptoms are detected:
•
•
•
•
The recorder paper consistently curls to one side.
Printing of unequal weight occurs along the vertical trace line, from one end to the other.
Dots are missing along the vertical trace.
Printing is too light following the recorder thermal print head replacement.
NOTE: If skewing occurs, check for other malfunctions. Noticeable skewing of a vertical line printed on the strip
chart paper is usually accompanied by one of the above-mentioned symptoms.
1. Remove the top cover as instructed in section 6.1.
2. Use a hex key to loosen the four hex-head lock screws, two on each side of the recorder assembly (See
Figure 5-3).
3. To move the recorder thermal print head forward on one side for horizontal adjustment, use long nose
pliers to back-off the corresponding captive screw (turn counterclockwise) from its alignment block (See
Figure 5-4). To move the recorder thermal print head backward on one side for horizontal adjustment, use
long nose pliers to tighten the corresponding captive screw (turn clockwise).
4. After making the necessary adjustments, use a hex key to tighten the four hex-head lock screws (See
Figure 5-3).
5. Re-install the top cover.
Figure 5-3
© 2013 by General Electric Company. All rights reserved.
Figure 5-4
2036947-00179
Chapter 5: Diagnostics and Troubleshooting
5.11.3 Light Printing
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
If the monitor recorder (intermittently) prints too lightly such that the prints on fetal chart paper are barely
legible, follow the troubleshooting flowchart (Figure 5-5) and the table to fix the issue. Load the monitor
recorder with the GE-approved chart paper. Close the recorder door and allow 1-2 pages to roll out by pressing
the Paper Advance button. Set the display to service mode and then press test button to get a test print.
NOTE: Don’t touch the thermal print head heating element with bare hand.
NOTE: Paper should be installed in the monitor’s strip chart recorder at all times. This reduces particle build-up
on TPH and facilitates opening the recorder door.
NOTE: Do not rotate the recorder roller without having chart paper.
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© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
Figure 5-5 Recorder Light Printing Symptom - Troubleshooting Flowchart
© 2013 by General Electric Company. All rights reserved.
2036947-00181
Chapter 5: Diagnostics and Troubleshooting
ID
Recorder Light Printing Troubleshooting Table
Symptom Description
Possible Causes
Actions and Solutions
Use GE-Recommended fetal chart paper only
Inappropriate fetal chart
(Part numbers: 2009828-CAO, 2009828-DAO,
paper is used.
2009828-FAO).
Use cotton swabs and methanol or isopropyl
alcohol to clean the thermal print head (See
section 3.3.2). Care must be taken not to touch
the heater elements while cleaning. Check for
missing segments on chart paper after cleaning.
Paper residue, dust or
other material is built up
on thermal print head
(TPH).
The monitor recorder
(intermittently) prints
too lightly such that
S11.1
the prints on fetal
chart paper are barely
readable.
Ensure all four springs are held captive between
TPH support and the recorder frame.
Thermal print head
pressure is uneven
because the springs are
not seated properly.
Recorder door assembly
is broken or loose.
Replace the recorder assembly.
Press and hold the
recorder door toward
the monitor. If printing
darkens on either side,
check if recorder door
assembly is broken or
loose causing the roller
alignment to be out of
adjustment (recorder
door heat staking joint
loose or broken).
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© 2013 by General Electric Company. All rights reserved.
Chapter 5: Diagnostics and Troubleshooting
ID
Recorder Light Printing Troubleshooting Table
Symptom Description
Possible Causes
Actions and Solutions
Note: Don’t touch the TPH heating element with
Thermal print head (TPH)
bare hand.
is not aligned properly
with respect to the roller. Perform Horizontal Offset Adjustment:
Press and hold the
1) Loosen four Socket Head Lock screws (label
recorder door toward
B), 2 No’s on either side L.H. and R.H
the monitor. If printing
darkens on either
2) With the help of Pivot blocks alignment
side with no recorder
screws (label-D and E) fine adjust the
door assembly broken
movement of recorder head forward and
or loose, then TPH
backward to attain a dark print. Ensure it
alignment needs
prints black lines parallel to chart paper
adjustment.
horizontal grid lines.
3) Check for printing uniform line darkness and
there are no missing dots or light print.
4) 4) Tighten the corresponding Socket Head
Lock screws (label –B) to a torque of 9kgf cm
L.H. and R.H (4 Places).
Perform Vertical Offset Adjustment:
1) Loosen the vertical adjustment Set screws
(label- A).
2) Fine adjust movement of TPH using Socket
Head Lock screw (Label- C). Move print head
right or left, until the first dot of the
© 2013 by General Electric Company. All rights reserved.
2036947-00183
Chapter 5: Diagnostics and Troubleshooting
ID
Recorder Light Printing Troubleshooting Table
Symptom Description
Possible Causes
Actions and Solutions
horizontal lines is 0.490 ±0. 010 from the inside
edge of the right hand edge of the paper. Use
film scale or vernier calipers for measurement.
3) Check the print line alignment is within spec.
4) Check for chart paper printing black.
5) Manually tighten the Set screws (label- A).
Set a multimeter to measure DC voltage.
Connect the positive lead of the multimeter to
pin 4 of J6 on the recorder board and connect
the negative lead to pin 4 of J5 connector on the
recorder board. Set the voltage by adjusting R2
on the recorder board to the VHEAD ± 0.1 Volt.
VHEAD is the voltage value marked on the print
head support (each print head is unique).
Print Head voltage is
incorrect.
Thermal print head is
defective.
Recorder board is
defective.
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Replace the thermal print head (See section
6.22).
Note: Don’t touch the thermal printer head (TPH)
heating element with bare hand.
Replace the recorder board (See section 6.18).
© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
This chapter describes the procedures used for replacement of the CorometricsTM 250cx Series monitor parts.
After any replacement procedure, perform the checkout procedures as described in Chapter 3.
Always read all the warnings, cautions, notes, and other information provided in “Important Service Safety
Information” before starting any replacement or repair. All replacement and repair procedures shall be
performed by authorized service personnel only.
CAUTION:
Genuine spare parts manufactured or sold by GE Healthcare must only be used for all repair and
replacement procedures.
NOTE: Standard service tools (such as nut driver, long nose pliers, hex keys, and Phillips screw driver) are
required to perform the repair and replacement procedures.
© 2013 by General Electric Company. All rights reserved.
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Chapter 6: Repair and Replacement Procedures
6.1 Top Cover, Top Cover Gasket, and Timekeeping RAM Chip
Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Confirm the monitor is turned off and the power cord is unplugged from the power outlet.
2. Use a Phillips screw driver to remove the screws (on the rear and bottom sides of the monitor) that attach
the top cover gasket to the unit chassis.
3. Place the monitor on a flat surface and gently slide the top cover out by pushing it towards the rear side of
the unit.
4. To remove the top cover gasket, hold the gasket on the inside front edge of the top cover and pull it free of
the cover. Clean the stamping area where the gasket was adhered to the cover by wiping the surface with
isopropyl alcohol.
5. To replace the timekeeping RAM chip (U30) on the main board, use a small screw driver or pliers to remove
the chip from its socket on the main board and then install the new chip into the socket.
6. Reverse steps to re-install. To re-install a new gasket, align the front edge of the gasket along the stamping
line on the inside of the top cover and apply pressure to secure it. Ensure the adhesive of the gasket is
completely sealed all along the stamping line.
CAUTION:
The top cover gasket protects the inside of the unit against fluid spills. Always make sure the gasket
is securely attached across the whole front of the top cover along the stamping line before reinstalling the top cover. Order a new gasket and replace it if the adhesive of the existing gasket is no
longer effective.
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Chapter 6: Repair and Replacement Procedures
6.2 Speaker Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect external display ribbon cable from J9 on DSP/Display board (See Figure 6-1).
3. Disconnect the speaker cable from the J10 connector on the main board.
4. Use a nut driver to remove the nuts and flat washers that attach the speaker to the mounting posts (See
Figure 6-2) and remove the speaker.
5. Reverse steps to re-install.
Figure 6-1
© 2013 by General Electric Company. All rights reserved.
Figure 6-2
2036947-00187
Chapter 6: Repair and Replacement Procedures
6.3 DSP/Display Board Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
88
Figure 6-3
Figure 6-4
Figure 6-5
Figure 6-6
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© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
4. Disconnect the DSP-to-Keypad ribbon cable from the J5 connector on the DSP/Display board (See Figure
6-5).
5. Disconnect the external display cable from J9 connector on the DSP/Display board (See Figure 6-1).
6. Use a Phillips screw driver to remove the two screws that attach the DSP/Display board to the chassis (See
Figure 6-6).
7. Pull the DSP/Display board up gently to disconnect it from the main board and slide it out.
8. Reverse steps to re-install.
6.4 Communication Board Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Use a Phillips screwdriver to remove the four screws on the rear side of monitor unit that attach the
communication board and its plate (the metal plate that the communication board is fixed to) to the
chassis (See Figure 6-7).
3. Pull up the communication board and plate gently to disconnect the communication board from the main
board.
4. Reverse steps to re-install.
Figure 6-7
© 2013 by General Electric Company. All rights reserved.
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Chapter 6: Repair and Replacement Procedures
6.5 Pneumatics Assembly Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover and the DSP/Display board as instructed in sections 6.1 and 6.3.
2. Use a Phillips screw driver to remove the two screws (on both sides of the monitor) that attach the front
bezel to the chassis (See Figure 6-8).
3. Open the recorder door (When closed, the door will interfere with the bezel movement).
90
Figure 6-8
Figure 6-9
Figure 6-10
Figure 6-11
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© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
4. Tilt the front bezel forward and away from the chassis to make the rear side of the NIBP connector on the
bezel accessible (See Figure 6-9).
5. Pull and disconnect the two red pneumatics tubes from the NIBP connector on the back of the bezel (See
Figure 6-10).
6. Pull the red tubes out of the chassis grommet.
7. Use a Phillips screw driver to remove the two screws that attach the pneumatics board to the chassis (See
Figure 6-11).
8. Disconnect the “clear” tubes from both PT1 and PT2 transducers on the main board (See Figure 6-12).
NOTE: Make a note of the “clear” tubes connection order before disconnecting them to re-install properly.
9. Disconnect the recorder cable from the J9 connector on the main board (See Figure 6-13).
10. Pull up the pneumatics board gently to disconnect it from the main board and remove it.
11. Reverse steps to re-install.
NOTE: To re-install “clear” tubes properly, make sure that the tube from E1 on pneumatic board is connected to
PT1 on the main board and the tube from E2 is connected to PT2.
Figure 6-12
© 2013 by General Electric Company. All rights reserved.
Figure 6-13
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Chapter 6: Repair and Replacement Procedures
6.6 Main Board Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover, DSP/Display board, and communication board as instructed in sections 6.1, 6.3, and
6.4.
2. Disconnect the recorder cable from the J9 connector on the main board (See Figure 6-13).
3. Use a Phillips screw driver to remove the two screws that attach the pneumatics board to the chassis (See
Figure 6-11).
4. Disconnect the “clear” tubes from both PT1 and PT2 transducers on the main board (See Figure 6-12). Do
not disconnect the red pneumatic tubes from the NIBP connector on the bezel.
NOTE: Make a note of the “clear” tubes connection order before disconnecting them to re-install properly.
Figure 6-14
Figure 6-15
Figure 6-16
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Chapter 6: Repair and Replacement Procedures
5. Pull up the pneumatics board gently to disconnect it from the main board and remove it.
6. Disconnect the power supply cable from the J8 connector on the main board (See Figure 6-14).
7. Disconnect the speaker cable from the J10 connector on the main board.
8. Use long nose pliers to remove nuts from PH1, PH2, and PH3 connectors that attach EMI plate to the main
board (See Figure 6-15).
9. Use a Phillips screw driver to remove the six screws that attach the main board to the chassis and then
remove the main board (See Figure 6-16).
10. Reverse steps to re-install.
NOTE: To re-install “clear” tubes properly, make sure that the tube from E1 on pneumatic board is connected to
PT1 on the main board and the tube from E2 is connected to PT2.
6.7 Display Assembly Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board ( See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Disconnect the DSP-to-Keypad ribbon cable from the J5 connector on the DSP/Display board (See Figure
6-5).
5. Disconnect the recorder cable from the J9 connector on the main board (See Figure 6-13).
6. Use a Phillips screw driver to remove the two screws (on both sides of the monitor) that attach the front
bezel to the chassis (See Figure 6-8).
7. Open the recorder door (When closed, the door will interfere with the bezel movement).
8. Tilt the front bezel forward and away from the chassis (See Figure 6-9).
© 2013 by General Electric Company. All rights reserved.
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Chapter 6: Repair and Replacement Procedures
9. Disconnect the Keypad-to-Volume ribbon cable from its connector on volume keypad board (See Figure
6-17).
10. Use a Phillips screw driver to remove the screw that attach display mounting bracket to the front bezel (See
Figure 6-18) and then remove the screw that attach the bracket to the display assembly (See Figure 6-19)
to remove the bracket.
11. Use a Phillips screw driver to remove the four screws that attach the display assembly to the front bezel to
release the display assembly (See Figure 6-20).
12. Remove the display lens.
13. Reverse steps to re-install.
94
Figure 6-17
Figure 6-18
Figure 6-19
Figure 6-20
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© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
6.8 Power Switch Assembly Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Disconnect the DSP-to-Keypad ribbon cable from the J5 connector on the DSP/Display board (See Figure
6-5).
5. Use a Phillips screw driver to remove the two screws (on both sides of the monitor) that attach the front
bezel to the chassis (See Figure 6-8).
6. Open the recorder door (When closed, the door will interfere with the bezel movement).
7. Tilt the front bezel forward and away from the chassis (See Figure 6-9).
8. Disconnect the power switch cable from the power supply bulkhead-mounted connector (See Figure 6-21).
9. Use long nose pliers to disconnect the four Fast-on tab connectors from the power switch.
10. Remove the metal retaining clip from the power switch.
11. Push power switch out through front bezel.
12. Reverse steps to re-install.
© 2013 by General Electric Company. All rights reserved.
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Chapter 6: Repair and Replacement Procedures
6.9 Trim Knob Control Assembly Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Disconnect the DSP-to-Keypad ribbon cable from the J5 connector on the DSP/Display board (See Figure
6-5).
5. Use a Phillips screw driver to remove the two screws (on both sides of the monitor) that attach the front
bezel to the chassis (See Figure 6-8).
6. Open the recorder door (When closed, the door will interfere with the bezel movement).
7. Tilt the front bezel forward and away from the chassis (See Figure 6-9).
8. Disconnect the Keypad-to-Volume ribbon cable from the connector on the keypad board (See Figure 6-22).
9. Disconnect the encoder cable from the keypad board (See Figure 6-23).
Figure 6-21
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Figure 6-22
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Chapter 6: Repair and Replacement Procedures
10. Pull out the trim knob and use long nose pliers to remove the encoder washer and the encoder.
11. Reverse steps to re-install.
6.10 Keypads Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Disconnect the DSP-to-Keypad ribbon cable from the J5 connector on the DSP/Display board (See Figure
6-5).
5. Use a Phillips screw driver to remove the two screws (on both sides of the monitor) that attach the front
bezel to the chassis (See Figure 6-8).
6. Open the recorder door (When closed, the door will interfere with the bezel movement).
7. Tilt the front bezel forward and away from the chassis (See Figure 6-9).
8. To remove the volume keypad board:
a. Disconnect the Keypad-to-Volume ribbon cable from the connector on the volume keypad board.
b. Use a Phillips screw driver to remove the screw that attach display mounting bracket to the front bezel
(See Figure 6-18) and then remove the screw that attach the bracket to the display assembly (See
Figure 6-19) to remove the bracket.
c. Use a Phillips screw driver to remove the four screws that attach the volume keypad board to the front
bezel and remove the volume keypad board and the pad.
9. To remove the keypad board:
a. Disconnect the Keypad-to-Volume ribbon cable from the connector on the keypad board (See Figure
6-22).
© 2013 by General Electric Company. All rights reserved.
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Chapter 6: Repair and Replacement Procedures
b. Disconnect the encoder cable from the keypad board (See Figure 6-23).
c. Use a Phillips screw driver to remove the two screws that attach the keypad bracket to the front bezel
(See Figure 6-24) and remove the keypad bracket.
d. Use a Phillips screw driver to remove the four screws that attach the keypad to the front bezel and
remove the keypad board and the pad.
10. Reverse steps to re-install.
Figure 6-24
Figure 6-23
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Chapter 6: Repair and Replacement Procedures
6.11 Main Power Supply / Fan Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover and the DSP/Display board as instructed in sections 6.1 and 6.3.
2. Cut tie-wrap holding power-switch cable to cable-tie mount on chassis.
3. Disconnect the power switch cable from the power supply bulkhead-mounted connector (See Figure 6-21).
4. Use long nose pliers to release the power supply bulkhead-mounted connector from the chassis.
5. Disconnect the power supply cable from J1 connector on the recorder board (See Figure 6-25). Slide
grommet out of bulkhead.
6. Disconnect the power supply cable from J8 connector on the main board (See Figure 6-14). Slide grommet
out of bulkhead.
7. Use a Phillips screw driver to remove the three screws from the side of the power supply (See Figure 6-26).
8. Use a Phillips screw driver to remove the four pan-head screws from the back of the power supply (See
Figure 6-27).
9. Use a Phillips screw driver to remove the one pan-head screw from the inside bottom of the power supply
(See Figure 6-28).
10. Unplug the fan from the power supply.
11. Remove the power supply from the chassis.
12. To remove the fan, use a Phillips screw driver to remove the four fan screws to release it.
13. Reverse steps to re-install.
© 2013 by General Electric Company. All rights reserved.
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100
Figure 6-25
Figure 6-26
Figure 6-27
Figure 6-28
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© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
6.12 Dual Ultrasound Board Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Use a Phillips screw driver to remove the card cage cover screws and remove the cage cover.
5. Disconnect the ultrasound cables from the connectors on the ultrasound board (See Figure 6-29).
6. Pull up the ultrasound board to release it from the front-end motherboard (See Figure 6-30).
7. Reverse steps to re-install.
NOTE: When re-installing the ultrasound cables, make sure the left-most ultrasound connector (US1) cable is
connected to J5 connector (the rear connector on the ultrasound board).
Figure 6-29
© 2013 by General Electric Company. All rights reserved.
Figure 6-30
2036947-001101
Chapter 6: Repair and Replacement Procedures
6.13 FECG/UA Board and MECG Board Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Use a Phillips screw driver to remove the card cage cover screws and remove the cage cover.
5. If present, disconnect the MECG cable from the connector on the MECG board (See Figure 6-31).
6. Pull out the FECG (and MECG) board(s) (See Figure 6-32). To remove the MECG board, remove the two screws
that attach the MECG and FECG boards together.
7. Remove the FECG/UA board.
8. Reverse steps to re-install.
Figure 6-31
102
Figure 6-32
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© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
6.14 SpO2 Carrier Board (with Nellcor/Masimo SpO2 Module) Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Use a Phillips screw driver to remove the card cage cover screws and remove the cage cover.
5. Disconnect the MSpO2 cable from the connector on the SpO2 Carrier board (See Figure 6-33).
Figure 6-33
Figure 6-34
Figure 6-35
© 2013 by General Electric Company. All rights reserved.
2036947-001103
Chapter 6: Repair and Replacement Procedures
6. Pull up the SpO2 carrier board with Nellcor/Masimo MSpO2 module assembly to release it from the frontend motherboard (See Figure 6-34).
7. Reverse steps to re-install.
NOTE: If the existing SpO2 carrier board is replaced with a different SpO2 board (e.g. Nellcor SpO2 is replaced
with Masimo SpO2 or vice versa), make sure to set the SW1 dip switches (See Figure 6-35) on the main
motherboard properly to select the correct SpO2 (See Table 1-2). When changing to Masimo SpO2 , make
sure to upgrade the monitor CPU software to version 5.30 to support Masimo MS-2011 (See Appendix F).
6.15 Isolated Power Supply Board Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Use a Phillips screw driver to remove the card cage cover screws and remove the cage cover.
5. Pull up the isolated power supply board to release it from the front-end motherboard (See Figure 6-36).
6. Reverse steps to re-install.
Figure 6-36
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Chapter 6: Repair and Replacement Procedures
6.16 Front-end Motherboard Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover and the DSP/Display board as instructed in sections 6.1 and 6.3.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Remove the dual ultrasound board, MECG/FECG board, SpO2 carrier board, and isolated power supply as
instructed in sections 6.12, 6.13, 6.14, and 6.15.
5. Pull up the three insulating metal sheets to release them from the front-end motherboard and remove
them from the card cage (See Figure 6-37).
6. Remove the five screws that attach the front-end motherboard to the chassis (See Figure 6-38).
7. Use a Phillips screw driver to remove the two screws (on both sides of the monitor) that attach the front
bezel to the chassis (See Figure 6-8).
8. Open the recorder door (When closed, the door will interfere with the bezel movement).
9. Tilt the front bezel forward and away from the chassis (See Figure 6-9).
10. Remove the MECG and FECG cable beads from the chassis bead clips (See Figure 6-39).
11. Disconnect the FECG cable from J6 connector on the front-end motherboard (See Figure 6-40).
12. Disconnect IUP cable from J7 connector on the front-end motherboard (See Figure 6-41).
13. Remove the front-end motherboard.
14. Reverse steps to re-install.
© 2013 by General Electric Company. All rights reserved.
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Figure 6-37
Figure 6-38
Figure 6-39
Figure 6-40
Figure 6-41
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Chapter 6: Repair and Replacement Procedures
6.17 Recorder Assembly and Recorder Door Button Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
3. Disconnect the DSP-to-LCD Decoder ribbon cable from the J2 connector on the DSP/Display board (See
Figure 6-4).
4. Disconnect the DSP-to-Keypad ribbon cable from the J5 connector on the DSP/Display board (See Figure
6-5).
5. Use a Phillips screw driver to remove the two screws (on both sides of the monitor) that attach the front
bezel to the chassis (See Figure 6-8).
6. Open the recorder door (When closed, the door will interfere with the bezel movement).
7. Tilt the front bezel forward and away from the chassis (See Figure 6-9).
8. Disconnect the recorder ribbon cable from the J2 connector on the recorder board (See Figure 6-42).
9. Disconnect the power supply cable from the J1 connector on the recorder board (See Figure 6-25).
10. Disconnect the recorder EMC ground wire Fast-on connector from the chassis tab (See Figure 6-43).
11. Use a Phillips screw driver to remove four screws that attach the recorder assembly mounting bracket to
the chassis (See Figure 6-44).
12. Remove recorder assembly and mounting bracket. Do not snag bracket on hoses or cables while removing.
13. To remove the recorder door button, use a Phillips screwdriver to remove the M3 screw that attaches the
button to the recorder latch arm and release the button.
14. Flip over the recorder assembly and use a Phillips screw driver to remove three screws that attach the
recorder assembly to the mounting bracket.
© 2013 by General Electric Company. All rights reserved.
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Chapter 6: Repair and Replacement Procedures
15. Reverse steps to re-install.
NOTE: When re-installing the recorder assembly mounting bracket, do not tighten the four screws until the
front bezel is installed. Make sure that the two front bezel fiducial pins are aligned with the recorder slots
and the three tabs on the bottom of front bezel are placed into their corresponding slots on the chassis
(See Figure 6-45) before tightening the screws.
NOTE: Upon re-installing the recorder board assembly, align the recorder so that it is equidistant from both
sides of the printer opening in the front bezel and the recorder door is flush with the outside of the front
bezel. Confirm that the recorder door will open and close without interference.
108
Figure 6-42
Figure 6-43
Figure 6-44
Figure 6-45
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
6.18 Recorder Board Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the recorder ribbon cable from the J2 connector on the recorder board (See Figure 6-42).
3. Disconnect the power supply cable from the J1 connector on the recorder board (See Figure 6-25).
4. Disconnect the recorder EMC ground wire Fast-on connector from the chassis tab (See Figure 6-43).
5. Disconnect recorder print head cable from the J3 connector on the recorder board (See Figure 6-46).
6. Disconnect the paper-out sensor cable from J6 connector on the recorder board (See Figure 6-47). Make a
note of the orientation of the connector for proper re-installation.
Figure 6-46
Figure 6-47
Figure 6-48
Figure 6-49
© 2013 by General Electric Company. All rights reserved.
2036947-001109
Chapter 6: Repair and Replacement Procedures
7. Disconnect the paper-low sensor cable from J5 connector on the recorder board (See Figure 6-48). Make a
note of the orientation of the connector for proper re-installation.
8. Disconnect recorder paper-loading sensor cable from the J8 connector on the recorder board.
9. Disconnect the stepper motor harness cable from the J4 connector on the recorder board.
10. Use a Phillips screw driver to remove one screw that attach the recorder board to the recorder assembly
and remove the recorder board (See Figure 6-49).
11. Reverse steps to re-install.
NOTE: When re-installing paper-low, paper-out, and paper-loading sensor cable connectors to their
counterpart connectors (J5, J6, and J8) on the recorder board, make sure the pin 1 of the cable
connector (pin 1 is marked on the connector) plugs into the pin 1 of its counterpart connector (pin 1 is
marked on the recorder board).
6.19 Recorder Stepper Motor Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the recorder assembly as instructed in section 6.17.
2. Disconnect the stepper motor harness cable from the J4 connector on the recorder board.
3. Use a Phillips screw driver to loosen the two screws attaching the motor to the frame (See Figure 6-50).
Figure 6-50
110
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© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
4. Slide the stepper motor out to remove it.
5. Reverse steps to re-install.
6.20 Recorder Paper-Out/Paper-Low Photosensor Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
Although these two reflective-sensors may be replaced in the field, tight tolerance repositioning is required to
ensure that the sensors function properly.
NOTE: When facing the front side of the monitor, the paper-low sensor is on the right side and the paper-out
sensor is on the left side (See Figure 7-3)
1. Remove the top cover as instructed in section 6.1.
2. To remove the paper-out photosensor:
a. Disconnect the paper-out sensor cable from its connector on recorder assembly (See Figure 6-51).
Make a note of the orientation of the connector for proper re-installation.
b. Using a small hex key to remove the two socket-head screws which attach the black sensor housing to
the angle bracket (See Figure 6-52).
c. Discard the sensor and the housing.
3. To remove the paper-low photosensor:
a. Disconnect the paper-low sensor cable from its connector on the recorder board (See Figure 6-53).
Make a note of the orientation of the connector for proper re-installation.
b. Using a small hex key to remove the two socket-head screws which attach the black sensor housing to
the angle bracket (See Figure 6-52).
c. Discard the sensor and the housing.
4. Reverse steps to re-install.
5. Perform a recorder photosensors check as instructed in section 4.4.2.
© 2013 by General Electric Company. All rights reserved.
2036947-001111
Chapter 6: Repair and Replacement Procedures
NOTE: When re-installing the sensor housings on to the recorder assembly using the two socket-head screws,
make sure that the top of the sensor housing is aligned with the top of the print head bracket (See
Figure 6-54) before tightening the screws.
NOTE: When re-installing paper-low and paper-out sensor cable connectors to their counterpart connectors
on the recorder assembly, make sure the pin 1 of the cable connector (pin 1 is marked on the connector)
plugs into the pin 1 of its counterpart connector (pin 1 is marked on the top of the recorder assembly as
illustrated below).
112
Figure 6-51
Figure 6-52
Figure 6-53
Figure 6-54
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
6.21 Recorder Paper-Loading Photosensor Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the recorder assembly as instructed in section 6.17.
2. Disconnect recorder paper-loading sensor cable from the J8 connector on the recorder board.
3. Turn over the recorder and use a Phillips screwdriver to remove the two screws which hold the sensor and
housing to the paper tray (See Figure 6-55).
4. Cut and remove the cable tie which holds the sensor cable.
5. Discard the sensor and printed circuit board.
6. Reverse steps to re-install.
7. Perform a recorder photosensors check as instructed in section 4.4.2.
NOTE: When re-installing the paper-loading sensor, make sure that there is enough slack in the cable so that
when the recorder door is opened the cable does not become taut.
Figure 6-55
© 2013 by General Electric Company. All rights reserved.
2036947-001113
Chapter 6: Repair and Replacement Procedures
6.22 Recorder Thermal Print Head Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect recorder print head cable from the J3 connector on the recorder board (See Figure 6-46).
3. Open the recorder door.
4. Use a Pillips screw driver to remove the two screws that attach the printer frame to the print head (See
Figure 6-56).
5. Support the print head by reaching in through the recorder door, then remove the two screws on top of the
print head.
6. Pull the print head down and out through the recorder door with the harness still attached.
NOTE: When pulling out the print head, make sure that the four pressure springs are held captive and they do
not fall out.
7. Remove the harness cable from the print head.
Figure 6-56
114
Figure 6-57
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 6: Repair and Replacement Procedures
8. Follow below steps to re-install a new thermal print head:
a. Carefully remove the new print head from the packaging. DO NOT TOUCH any of the contact pins.
b. Record the voltage rating marked on the decal affixed to the bottom of the print head. This value is the
new VHEAD voltage. Cross out the old VHEAD voltage (already marked on the print head bracket) and
mark the new VHEAD voltage on the bracket (See “15.3V” example in Figure 6-57).
c. Re-connect the harness cable to the new print head.
d. Slide the new print head into position through the recorder door and under its bracket. Push on the
center of the new print head to ensure it is pushed all the way back.
e. Align the new print head with the front holes in the bracket and re-install the two screws.
f. Re-connect the harness cable to the recorder board at J3.
g. Set a multimeter to measure DC voltage. Connect the positive lead of the multimeter to pin 4 of J6 on
the recorder board and connect the negative lead to pin 4 of J5 connector on the recorder board.
h. Turn on the monitor.
i. Press the record button to turn on the recorder.
j. Adjust R2 on the recorder board until the reading on the multimeter is within ±100 mV of the new
VHEAD voltage.
k. Use the Trim Knob Control to go to Install Options Screen 1 screen and access the Diagnostic Control
screen and perform the recorder calibration test to confirm the printing and adjustment of vertical
lines. If light printing occurs, perform horizontal offset adjustment as instructed in section 5.11.2.
l. Re-install the top cover.
6.23 Front Bezel Replacement
SENSITIVE TO ELECTROSTATIC DISCHARGE
This procedure includes ESD sensitive parts. ESD control guidelines must be followed during this
procedure to ensure that static charges are safely conducted to the ground and not through the
sensitive device, to prevent damage to the equipment.
1. Remove the top cover as instructed in section 6.1.
2. Disconnect the inverter cable from the J1 connector on the DSP/Display board (See Figure 6-3).
© 2013 by General Electric Company. All rights reserved.
2036947-001115
Chapter 6: Repair and Replacement Procedures
3. Disconnect the DSP-to-LCD Decoder ribbon cable from J2 connector on the DSP/Display board (See Figure
6-4).
4. Disconnect the DSP-to-Keypad ribbon cable from J5 connector on the DSP/Display board (See Figure 6-5).
5. Use a Phillips screw driver to remove the two screws (on both sides of the monitor) that attach the front
bezel to the chassis (See Figure 6-8).
6. Open the recorder door (When closed, the door will interfere with the bezel movement).
7. Tilt the front bezel forward and away from the chassis (See Figure 6-9).
8. Use a Phillips screw driver to remove the card cage cover screws and remove the cage cover.
9. Disconnect the ultrasound cables from the connectors on the ultrasound board (See Figure 6-29).
10. If present, disconnect the MECG cable from the connector on the MECG board (See Figure 6-31).
11. Disconnect the MSpO2 cable from the connector on the SpO2 Carrier board (See Figure 6-33).
12. Remove the MECG and FECG cable ferrite beads from the chassis bead clips (See Figure 6-39).
13. Remove the MSpO2 cable ferrite beads from the chassis bead clips.
14. Remove the FECG ground cable from the chassis post by removing its nut.
15. Disconnect the FECG cable from J6 connector on the front-end motherboard (See Figure 6-40).
16. Disconnect IUP cable from J7 connector on the front-end motherboard (See Figure 6-41).
17. Disconnect the two red pneumatics tubes from front-bezel NIBP connector (See Figure 6-10).
18. Remove the display assembly as instructed in section 6.7.
19. Remove the keypads as instructed in section 6.10.
20. Remove the trim knob control and the encoder as instructed in section 6.9.
21. Remove the power switch as instructed in section 6.8.
22. Remove front bezel from chassis tabs.
23. Reverse steps to re-install.
NOTE: When re-installing the ultrasound cables, make sure the left-most ultrasound connector (US1) cable is
connected to J5 connector (the rear connector on the ultrasound board).
116
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 7: Service Parts
This chapter illustrates the CorometricsTM 250cx Series monitor service parts and includes the orderable service
kit part numbers. A complete Field Replaceable Unit (FRU) list is also provided.
© 2013 by General Electric Company. All rights reserved.
2036947-001117
Chapter 7: Service Parts
7.1 Illustrated Parts
Figure 7-1 Exploded View
118
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 7: Service Parts
Callout
1
2
3
4
5
6
7
8
9
10
11
12
13
Part Description
Top cover
Top cover gasket
Communication board with plate
Speaker
DSP board
Cage cover
Pneumatics board
Recorder board
Recorder assembly
Display assembly
Keypad/Volume pad
Trim knob control and switch
Front bezel with cables
14,15
Front panel labels, Rear panel
labels
16
17
18
19
20
21
22
23
24
25
26
Frond-end motherboard
Chassis
Main board
Recorder mounting bracket
Fan
Main power supply
Power switch assembly
Miscellaneous Cables
Screws, washers, spacers
Power cord holder (P-clamp)
Timekeeping RAM chip (U30)
Orderable
Service Kit Number
2025177-030
2025177-031
2025177-070
2025177-003
2025177-077
Non-Orderable
2025177-020
2025177-072
2025177-071
2025177-076
2025177-073
2025177-026
2025177-082
2025177-034
2025177-059
2025177-060
2025177-061
2025177-069
Non-Orderable
2025177-078
Non-Orderable
2025177-006
2025177-074
2025177-027
2025177-019
2025177-002
2025177-054
414775-001
Orderable Service Kit Description
Top cover FRU
Top cover gasket FRU
Communication board with plate FRU
Speaker FRU
DSP Board FRU
Not applicable
Pneumatics board FRU
Recorder board FRU*
Recorder assembly FRU**
Display FRU
Keypad/Volume pad FRU
Trim knob control and switch FRU
Front bezel with cables FRU***
Label FRU kit, English (US)
See section 7.2 for descriptions of
language-specific label FRU kits.
Frond-end motherboard FRU
Not applicable
Main board FRU
Not applicable
Fan FRU
Main power supply FRU
Power switch assembly FRU
Cables FRU
Hardware FRU kit
Power cord holder FRU
Timekeeping RAM chip
* For all Coro 250cx units that were manufactured prior to January 29, 2010, i.e. unit serial numbers before SDJ10054541PA, order an
additional service kit (print head cable FRU kit, Part number: 2025177-042, which contains the new recorder cable and print head) and
follow instruction included in the kit to replace the print head thermal and the recorder cable whenever you order the recorder board
FRU (PN: 2025177-072 -FRU CORO250) to replace the recorder board.
The new recorder board and new recorder cable/print head must also be ordered and installed whenever there is a need to replace the
old version of recorder print head/cable in a unit.
**FRU kit does not include the mounting bracket.
*** The NIBP socket on the front bezel is also separately orderable through NIBP socket replacement kit (Part number: 2025177-046).
© 2013 by General Electric Company. All rights reserved.
2036947-001119
Chapter 7: Service Parts
Figure 7-2 Card Cage Boards
Orderable
Service Kit Number
Isolated power supply board
2025177-066
FECG/UA board
2025177-065
MECG board
2025177-075
Callout Part Description
1
2
3
4
SpO2 carrier board with
oximetry*
5
Dual ultrasound board
Orderable Service Kit Description
Isolated power supply board FRU
FECG/UA board FRU
MECG board FRU
2025177-010
SpO2 carrier board with Nellcor oximetry FRU
2025177-011
SpO2 carrier board with Masimo (MS-2011)
oximetry FRU
Dual ultrasound FRU
2025177-064
* To replace MASIMO SpO2 with NELLCOR SpO2 in a CorometricsTM 250CX Series monitor, order the relevant replacement kit (Part
Number: 2025177-044).
To replace NELLCOR SpO2 with MASIMO SpO2 in a CorometricsTM 250CX Series monitor, please order the relevant replacement kit (Part
Number: 2025177-043).
120
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 7: Service Parts
Figure 7-3 Recorder
Orderable
Orderable Service Kit Description
Service Kit Number
Recorder thermal print head
2025177-056
Recorder thermal print head FRU
Recorder stepper motor
2025177-057
Recorder stepper motor FRU
Recorder paper-low
photosensor
Recorder paper-out
2025177-058
Recorder photosensors FRU
photosensor
Recorder paper-load
photosensor
Recorder door button
2025177-047
Recorder door button FRU
M3x12 Phillips screw
2025177-047
Recorder door button FRU
Recorder assembly
2025177-071
Recorder assembly FRU
Callout Part Description
1
2
3
4
5
6
7
8
© 2013 by General Electric Company. All rights reserved.
2036947-001121
Chapter 7: Service Parts
Figure 7-4 Labels
Orderable
Orderable Service Kit Description
Service Kit Number
Callout Part Description
1
2
3
4
5
6
7
8
9
122
Connectors label
Main keypad label
Volume pad label
Masimo/Nellcor
overlay label
Paper loading label
Rear panel label
Electrical shock hazard label
VGA connector label
Serial number label
2036947-001
See section 7.2
Labels FRU Kit (Language-specific)
Non-Orderable
Not applicable
© 2013 by General Electric Company. All rights reserved.
Chapter 7: Service Parts
7.2 Labels
This section includes the list of product labels. For the location of each label, refer to Figure 7-3.
NOTE: The following labels shown are for illustration purposes only. The content on the labels shown here may
be slightly different from the content of the actual labels on the system.
Label Image
Label Name
Orderable
Service Kit
Number
Orderable
Service Kit
Description
See the NOTE
below this table.
Labels FRU Kit
(Languagespecific)
Connectors label
Main keypad label
Volume pad label
Paper loading
label
Paper loading
label
© 2013 by General Electric Company. All rights reserved.
2036947-001123
Chapter 7: Service Parts
Label Image
Label Name
Orderable
Service Kit
Number
Orderable
Service Kit
Description
Non-Orderable
Not applicable
Rear panel label
Electrical shock
hazard label
VGA connector
label
Serial number label
NOTE: Use below part numbers to order the language-specific label FRU kits:
2025177-034 : Label FRU Kit, English (US)
2025177-059 : Label FRU Kit, Lang 4 (Czech, Greek, Indonesian, Lithuanian, Portuguese, Turkish)
2025177-060 : Label FRU Kit, Lang 3 (Danish, Dutch, French, German, Japanese, Spanish)
2025177-061 : Label FRU Kit, Lang 2 (Finnish, Italian, Norwegian, Polish, Russian, Swedish)
7.3 Power Cords
Power Cord Part Number
2027249-021
2027249-022
2027249-023
2027249-024
2037556-034
2037556-035
2037556-036
2037556-037
2037556-044
124
Power Cord Description
Power cord - USA (IEC)
Power cord - ANZ
Power cord - UK
Power cord - EUR
Power cord - China
Power cord - Japan
Power cord - Denmark
Power cord - India
Power cord - Brazil
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 7: Service Parts
7.4 FRU List
Part Number
2025177-002
Part Description
Hardware FRU Kit
QTY
BRACKET , GROUNDING PLATE
[1]
BRACKET , PRINTER SUPPORT, 120 V4
[1]
BRACKET 120 SERIES V4
[1]
BRACKET MTG 120 SERIES V4
[1]
BUSHING INSULATOR SNAP
[1]
CABLE,TIE MOUNT,3/4IN,ADH,.BACK
[1]
CLIP EMI 4 PRONGS
[2]
GROUND WIRE ASSEMBLY
[1]
JACKSOCKET,4-40,.312LG,
[1]
NUT, M3.5 HEX, STL ZN, DIN 934
[5]
PLUG TELEMETRY COROLITE
[1]
SCR ,M3.5X10, PNHD, PHH, STL ZN DIN 7985
[12]
SCR ,M3X8 PHH PNHD,STL ZN, PT TYPE
[4]
SCR M3.5X30 PH PHD STL ZN DIN 7985 DRILO
[4]
SCR M3.5X6 PH PHD STL ZN DIN 7985 DRILOC
[4]
SCR M3.5X8 PH FHD STL ZN DIN 965A DRILOC
[5]
SCR M3.5X8 PH PHD STL ZN DIN 7985 DRILOC
[24]
SCR M3X12 PH PHD STL ZN DIN 7985 DRILOC
[1]
SCR M3X5 PH PHD STL ZN DIN 7985 DRILOC
[2]
SCR M3X6 PH PHD STL ZN DIN7985 DRILOC
[21]
SCR M3X8 PH PHD STL ZN DIN 7985 DRILOC
[4]
SCR,4-40,BH,1/4 LG,SLTD,N,YLON
[2]
SCR,4-40,PH,1/4L,PHL,LL S,TRIP
[2]
SCR,6-32,PH,3/8L,PHL,LL S,TRIP
[4]
SCR,6-32,PH,5/16L,PHL,LL,STRIP
[5]
SPACER PCB STAND OFF
[3]
SPACER PCB STAND OFF
[4]
TIE WRAP 4.00LG X .10W
[2]
TUBING SILICONE CLEAR 3/32” ID 7/32” OD
[0.29 ft]
TUBING SILICONE RED 1/8”ID X 1/4”OD
[3.9 ft]
TYRAPS,CABLE TIES
[1]
WSHR , M3.5 FLAT, STL ZN, DIN 125A
[8]
WSHR NYLON 10MM OD, 4.1MM ID, 4.5MM THK
[2]
© 2013 by General Electric Company. All rights reserved.
2036947-001125
Chapter 7: Service Parts
Part Number
2025177-003
Part Description
Speaker FRU Kit
QTY
Speaker assembly (Wire and connector included)
2025177-006
Fan FRU Kit
Fan assembly (connector included)
2025177-064
[1]
Dual Ultrasound Board FRU Kit
Dual ultrasound board
2025177-065
[1]
FECG/UA Board FRU Kit
FECG/UA board
2025177-066
[1]
Isolated Power Supply Board FRU Kit
Isolated power supply board
2025177-010
[1]
SpO2 Carrier Board with Nellcor FRU Kit
[1]
SpO2 carrier board with Nellcor SpO2 board
2025177-011
2025177-069
SpO2 Carrier Board with Masimo FRU Kit
SpO2 carrier board with Masimo (MS-2011) SpO2 board
[1]
SpO2 connector board (for bezel)
[1]
Coro250/250cx software upgrade V2.3.0 CD
[1]
FM I/C cable for flying config Coro150 series
[1]
Masimo MS11 to MS-2011 upgrade instruction sheet
[1]
Frond-end Motherboard FRU Kit
Front-end motherboard assembly
2025177-070
[1]
Communication Board with Plate FRU Kit
Communication board assembly (Panel included)
2025177-071
2025177-019
2025177-020
126
[1]
Recorder Assembly FRU Kit
Recorder assembly (Recorder board, photosensors, and stepper motor included)
2025177-072
[1]
[1]
Recorder Board FRU Kit
Recorder board assembly
[1]
PCB insulating sheet
[1]
Cables FRU Kit
Recorder cable assembly
[1]
DSP-to-Keypad ribbon (5 cond.) cable assembly
[1]
Ribbon (14 pin) cable assembly
[1]
DSP-to-LCD ribbon (20 cond.) cable assembly
[1]
DSP-to-LCD ribbon (30 cond.) cable assembly
[1]
DSP-to-Inverter (8 cond.) cable assembly
[1]
VGA cable assembly
[1]
Pneumatics Board FRU Kit
NIBP pneumatics board assembly (pump and silicon tubings included)
[1]
NIBP board assembly installation instruction sheet
[1]
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 7: Service Parts
Part Number
2025177-082
Part Description
Front Bezel with Cables FRU Kit
QTY
Front bezel assembly (Ultrasound, ECG, UA, SpO2 cable assemblies and sockets plus
NBP socket and display lens included)
2025177-073
2025177-026
2025177-027
Keypad/Volume Pad FRU Kit
Main user interface PCB assembly
[1]
Keyboard pad, side
[1]
Keyboard pad, main
[1]
Trim Knob Control and Switch FRU Kit
Trim Knob
[1]
Encoder, optical, pushbutton, 16 POS
[1]
Washer, encoder, non-turn
[1]
Power Switch Assembly FRU Kit
Power switch assembly (wires, terminals and contacts included)
2025177-074
2025177-075
2025177-031
Power supply
[1]
Cable, tie mount
[1]
Cable ties, tyraps
[1]
MECG Board FRU Kit
[1]
Top Cover FRU Kit
Cover
[1]
Gasket, Left
[1]
Gasket, Top
[1]
Gasket, Right
[1]
Screw M3.5x8, PH, STL
[7]
Screw, 6-32, PH, STRIP
[2]
Top Cover Gasket FRU Kit
Tape, Foam 4508 0.5IN x 36YDS
2025177-076
2025177-077
[1]
Display FRU Kit
Display assembly (Mounting bracket, display cover and cables included)
[1]
Display lens
[1]
DSP Board FRU Kit
DSP/Display board assembly
2025177-034
[1]
Main Power Supply FRU Kit
MECG board
2025177-030
[1]
[1]
Labels FRU Kit, English (US)
Connector label
[1]
Main keypad label
[1]
Volume pad label
[1]
Paper loading label
[1]
© 2013 by General Electric Company. All rights reserved.
2036947-001127
Chapter 7: Service Parts
Part Number
2025177-078
Part Description
QTY
Rear panel label
[1]
Electrical shock hazard label
[1]
VGA connector label
[1]
Coro259 Masimo overlay label
[1]
Coro259 Nellcor overlay label
[1]
Main Board FRU Kit
Main board assembly
2025177-042
2025177-043
2025177-044
2025177-046
2025177-047
2025177-054
2025177-055
128
[1]
Print Head Cable FRU Kit
Recorder thermal print head
[1]
Recorder print head cable assembly
[1]
Nellcor to Masimo SpO2 Upgrade Kit
SpO2 carrier board with Masimo (MS-2011) SpO2 board
[1]
SpO2 connector board (for bezel)
[1]
Coro250/250cx software upgrade V2.3.0 CD
[1]
FM I/C cable for flying config Coro150 series
[1]
Nellcor To Masimo label
[1]
Coro259 Masimo overlay label
[1]
Nellcor to Masimo MS-2011 upgrade instruction sheet
[1]
Masimo to Nellcor SpO2 Upgrade Kit
SpO2 carrier board with Nellcor SpO2 board
[1]
Masimo To Nellcor label
[1]
Coro259 Nellcor overlay label
[1]
Masimo to Nellcor upgrade instruction sheet
[1]
NIBP Connector FRU Kit
NBP Socket
[1]
NBP Connector replacement instruction sheet
[1]
Recorder Door Button FRU Kit
Recorder door button
[1]
M3x12 Phillips screw
[1]
Power Cord Holder FRU Kit
Power cord holder (P-clamp)
[5]
M3.5 X 8 Phillips Screw
[5]
M3.5 Washer
[5]
ECG Cables FRU Kit
FECG simulation cable
[1]
MECG simulation cable
[1]
2036947-001
© 2013 by General Electric Company. All rights reserved.
Chapter 7: Service Parts
Part Number
2025177-056
2025177-057
2025177-058
2025177059/060/061
414775-001
Part Description
Recorder Thermal Print Head FRU Kit
QTY
Thermal print head
[1]
M3 x 5 Phillips Screw
[2]
Recorder Stepper Motor FRU Kit
Stepper motor assembly
[1]
4-40 Phillips Screw
[2]
Recorder Photosensors FRU Kit
Paper-low photosensor assembly
[1]
Paper-out photosensor assembly
[1]
Paper-load photosensor assembly
[1]
Label FRU Kit, Lang 4/Lang 3/Lang 2
Connector IEC label, Coro250cx, Lang 4/Lang 3/Lang 2
[1]
Connector IEC label, Coro256cx, Coro250cx, Lang 4/Lang 3/Lang 2
[1]
Main keypad label, Lang 4/Lang 3/Lang 2
[1]
Volume pad label, Lang 4/Lang 3/Lang 2
[1]
Paper loading label, Lang 4/Lang 3/Lang 2
[1]
Rear panel label
[1]
Electrical shock hazard label, Lang 4/Lang 3/Lang 2
[1]
VGA connector label Coro259 Masimo overlay label
[1]
Coro259 Masimo overlay label
[1]
Coro259 Nellcor overlay label
[1]
Coro 256 Overlay Label
[1]
Timekeeping RAM Chip
Timekeeping RAM Chip
© 2013 by General Electric Company. All rights reserved.
[1]
2036947-001129
Chapter 7: Service Parts
130
2036947-001
© 2013 by General Electric Company. All rights reserved.
Appendix A: Technical Specifications
This section contains the list of the technical specifications for the CorometricsTM 250cx Series monitors.
NOTE: Specifications are subject to change without notice.
© 2013 by General Electric Company. All rights reserved.
2036947-001131
Appendix A: Technical Specifications
A.1 General Product Specifications
Category
Power Requirements
Nominal Line Voltage:
Line Frequency:
Power Consumption (maximum):
Chassis Leakage:
Physical Characteristics
Height:
Width:
Depth:
Weight:
Environmental Conditions
Monitor:
Ambient Temperature:
Relative Humidity:
Atmospheric Pressure:
Strip Chart Paper1:
Ambient Temperature:
Relative Humidity:
Atmospheric Pressure:
Certification
ANSI/AAMI EC13-1992:
UL-60601-1:
CUL:
General Product Specifications
Specifications
100VAC 120 VAC 220 VAC 230 VAC 240 VAC
50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz
100 W
100 W
0.4 A
0.4 A
0.4 A
<300 μA
6.7 in (17.0 cm)
16.7 in (42.4 cm)
17.5 in (44.4 cm)
22.0 lbs (10.9 kg) approx.
Operating
Storage
50°F to 104°F (10°C to 40°C)
10% to 95%, non-condensing
700–1060 mbar (525–795 mmHg)
14°F to 131°F (–10°C to 55°C)
0% to 95%, non-condensing
700–1060 mbar (525–795 mmHg)
50°F to 104°F (10°C to 40°C)
30% to 70%, non-condensing
700–1060 mbar (525–795 mmHg)
< 80°F (< 26.5°C)
45% to 65%, non-condensing
700–1060 mbar (525–795 mmHg)
Complies with all areas except those listed below:
3.1.2.1e: Heart Rate Meter Accuracy and Response to Irregular Rhythm
(not tested)
3.2.6.1: Range of QRS wave amplitude and duration
3.2.7: Range and accuracy of heart rate meter (4.2.7 f: input rate of 300
bpm.)
3.2.8.1: Lower Alarm Limit (The lowest alarm limit on the 250cx Series is
35 bpm.)
3.2.9.7a: Output Display a) Channel Width
3.2.9.8c: Impulse Response
3.2.9.12: Pacemaker Pulse Display capability
Classified to UL-60601-1
Medical electrical equipment classified by Underwriter’s Laboratories, Inc.,
with respect to fire, shock, and mechanical hazards in accordance with
UL-60601-1.
Classified with respect to electric shock, fire, mechanical, and other
specified hazards only, in accordance with CAN/CSA C22.2 No. 601.1
1 Paper operating environmental conditions are for a period of less than one month. Paper storage environmental conditions are for extended
storage.
132
2036947-001
© 2013 by General Electric Company. All rights reserved.
Appendix A: Technical Specifications
A.2 Strip Chart Recorder Specifications
Strip Chart Recorder Specifications
Category
Heart Rate Scale
Chart Width:
Scaling:
Range:
Resolution:
Uterine Activity Scale
Chart Width:
Scaling:
Range:
Resolution:
Maternal Pulse Oximetry MSpO2 Scale
Chart Width:
Scaling:
Range:
Resolution:
Recorder Drive
Speeds:
Speed Accuracy:
© 2013 by General Electric Company. All rights reserved.
Specifications
International
8 cm
20 bpm/cm
50–210 bpm
1 bpm
Domestic
7 cm
30 bpm/cm
30–240 bpm
1 bpm
Tocotransducer
4 cm
25 mmHg (3.3 kPa)/cm
0–100 mmHg (0–13.3 kPa)
1 mmHg/kPa
Domestic
4 cm
12.5%/cm or 25%/cm
60–100% or 0–100%
1%
International
4 cm
12.5%/cm or 25%/cm
50–100% or 0–100%
1%
1, 2, and 3 cm/min
± 1%
2036947-001133
Appendix A: Technical Specifications
A.3 Operating Modes Specifications
CAUTION:
The monitor may produce incorrect results if operated outside the specified parameter
specifications in below table.
Category
Operating Modes Specifications
Specifications
FECG Mode
Technique:
Heart Rate Counting Range:
Heart Rate Resolution:
Artifact Elimination:
Countable Input Signal Range:
Offset Voltage Tolerance (Differential):
Maximum Common Mode Voltage:
Preamplifier Bandwidth:
Common Mode Rejection:
Balanced:
Unbalanced 5kΩ RA or LA:
Input Equivalent Noise:
Input Impedance:
Differential:
Common Mode:
Mains Frequency Rejection:
Leakage Current:
Isolation, Mains-to-Patient:
Ultrasound Mode
Technique:
Transducer Type:
Pulse Repetition Frequency:
Single Ultrasound Mode:
Dual Ultrasound Mode:
Pulse Duration:
Transmitter Frequency:
Spatial-Peak Temporal Average Intensity:
Spatial-Average Temporal Average Intensity:
Focal 20 dB Beam Area:
Peak Instantaneous Intensity:
Peak-Negative Acoustic Pressure:
Heart Rate Counting Range:
Leakage Current:
134
Peak detecting, beat-to-beat cardiotachometer
30–240 bpm
± 1 bpm
Selectable, ± 25 bpm artifact rejection
15 μV to 2 mV peak-to-peak
± 300 mVdc maximum
20 V peak-to-peak
1–90 Hz
> 120 dB at mains frequency, with patient cable
> 110 dB at mains frequency
< 10 μV peak-to-peak
> 10 MΩ
> 20 MΩ
> 40 dB
< 10 μA at 100-240 VAC, electrically isolated
> 4 kVAC
Pulsed Doppler with autocorrelation processing
9-crystal
4 kHz
2 kHz
92 μs
1.151 MHz
Ispta < 10 mW/cm2
Isata< 5 mW/cm2
16.6 cm2, at a range = 7 cm
1.8 mW/cm2
p < 10.0 kPa
50–210 bpm
< 100 μA at 100-240 VAC, isolated by transducer
2036947-001
© 2013 by General Electric Company. All rights reserved.
Appendix A: Technical Specifications
Operating Modes Specifications
Specifications
Tocotransducer
0–100 mmHg (0–13.3 kPa)
1 mmHg (0.13 kPa)
dc to 0.5 Hz
Category
Uterine Activity Mode
Range (typical):
Resolution:
Bandwidth:
Excitation Voltage:
Zero Set Temperature Drift:
Leakage Current:
MECG Mode
Technique:
Maternal ECG Electrode Type:
Leads Available:
Heart Rate Counting Range:
Heart Rate Resolution:
Heart Rate Update Rate:
Countable Input Signal Range:
Baseline Drift:
Tall T-wave Rejection:
Heart Rate Meter Response Time:
80–120 bpm Step Increase:
80–40 bpm Step Decrease:
Alarm Time for Tachycardia 80–200 bpm:
Offset Voltage Tolerance (Differential):
Maximum Common Mode Voltage:
Preamplifier Bandwidth:
Common Mode Rejection:
Balanced:
Unbalanced 5K RA or LA:
Input Equivalent Noise: Input Impedance:
Differential:
Common Mode:
Mains Frequency Rejection:
Leakage Current:
Isolation, Mains-to-Patient:
Leads Off Detection:
Alarms:
Audio:
Visual:
Limits:
Technical:
Tachycardia Response Time:
© 2013 by General Electric Company. All rights reserved.
< 0.1 mmHg/°C (0.013 kPa/°C), excluding transducer
< 100 μA at 100-240 VAC, electrically isolated
Peak detecting, beat-to-beat cardiotachometer
Medtronic 1700-003 or equivalent
I, II, and III
30–240 bpm
± 1 bpm
> 1 update per second
0.5 mV to 5 mV peak-to-peak
< 0.5 mV RTI
0.8 x QRS amplitude
< 2 seconds
< 3 seconds
< 10 seconds (high alarm limit at 100 bpm)
± 300 mVdc maximum
20 V peak-to-peak
0.6 to 40 Hz
> 80 dB at mains frequency, with patient cable
> 50 dB at mains frequency
< 30 μV peak-to-peak
> 2.5 MΩ
> 10 MΩ
> 40 dB
< 10 μA at 100-240 VAC, with cable, electrically isolated
> 4 kVAC
dc current < 0.1 μA
Alternating 1.5-second chimes
Flashing heart rate numeric or message
User-selectable high and low maternal heart rate
Leads off
< 8 seconds
2036947-001135
Appendix A: Technical Specifications
Category
Pacemaker Detection/Rejection:
Input Voltage Range:
Input Pulse Width:
Pulse Rise/Fall Time:
Overshoot/Undershoot:
Operating Modes Specifications
Specifications
± 2.5 mV to ± 700mV
0.1 to 2 ms
< 10% of pulse width; not greater than 100 μs
2 mV
CAUTION:
Excessive overshoot time of
pacemaker pulse may cause false
QRS detection.
136
2036947-001
© 2013 by General Electric Company. All rights reserved.
Appendix A: Technical Specifications
Category
Operating Modes Specifications
Specifications
Maternal Blood Pressure Mode (DINAMAP®
SuperSTAT)
Technique:
Blood Pressure Range:
Systolic
Diastolic Visual
Mean Arterial Pressure (MAP)
Pulse Rate Range:
Blood Pressure Accuracy:
Pulse Rate Accuracy:
Cuff Inflation:
Inflation Pressure Range:
Cuff Deflation:
Safety Features:
Display/Record:
Alarms:
Audio
Visual
Limits
Technical
Compliance
Oscillometric. Microprocessor software eliminates most
ambient noise and motion artifact.
30–290 mmHg (4.0–38.7 kPa)
10–220 mmHg (1.3–29.3 kPa)
20–260 mmHg (2.7–34.7 kPa)
30–200 bpm
± 5 mmHg (0.7 kPa) with a standard deviation no greater than
8 mmHg (1.1 kPa)
± 2 bpm or ± 2% (whichever is greater)
Initial inflation to 135 mmHg (18.0 kPa). Subsequent inflation
approximately 30 mmHg (4.0 kPa) greater than the previous
systolic pressure.
100-250 mmHg in increments of 5 (13.3 ± 33.3 kPa in steps of
0.7)
Automatic
Automatic cuff deflation if: cuff pressure exceeds the
overpressure limit of 315 mmHg ± 15 mmHg (42.0 ± 2.0 kPa);
or maximum reading determination time is exceeded (not
to exceed AAMI /ANSI SP10-1992 limit of 180 s); or safety
timer detects microprocessor failure. Auto mode minimum
30-second delay from the end of one determination to the
beginning of another to allow for venous return
Systolic, diastolic, and mean pressure; pulse rate
Alternating 1.5-second chimes
Flashing pressure numeric or message
User-selectable high and low systolic, diastolic, and mean
pressures; User-selectable high and low pulse rate
Cuff errors, connection errors, insufficient signal, excessive
inflation or determination times, overpressure, hose errors,
excessive motion, communication problem, or self-test failure.
The 250cx Series blood pressure parameter complies with
the American National Standard for Electronic or Automated
Sphygmomanometers [AAMI/ANSI SP10-1992]. The GE
monitor values are based on the oscillometric method of
noninvasive blood pressure measurement and correspond
to comparisons with intra-aortic values within ANSI/AAMI
Standards for accuracy.
This device is covered under one or more of the following US Patents: 6,423,010; 6,358,213; 5,704,362; 5,680,870; 5,579,776; 5,518,000; 5,170,795;
5,052,397; 4,754,761; 4,638,810 and international equivalents. USA patents pending.
© 2013 by General Electric Company. All rights reserved.
2036947-001137
Appendix A: Technical Specifications
Operating Modes Specifications
Category
Specifications
Maternal Pulse Oximetry Mode (Masimo)
Technique:
Spectrophotometry and plethysmography.
Sensor Accuracy1:
Sensor Model
Weight Range
Saturation No Motion
Accuracy Motion
Pulse Rate No Motion
Accuracy Motion
Low Perfusion Saturation
Accuracy Pulse Rate
Measurement Range:
Saturation Range (SpO2%)
Pulse Rate (bpm)
Perfusion
Accuracy and Motion Tolerance:
Saturation (SpO2%)
During no motion conditions - Adults2
During motion conditions - Adults3
Low Perfusion
Wavelengths:
Red
Infrared
Maximum Optical Output Power:
Radiant Power at 50 mA pulsed
138
1%-100%
25-240 beats/min
0.02%-20%
70%-100% ± 2 digits
70%-100% ± 3 digits
70%-100% ± 2 digits
0%-69% unspecified
663 nm, nominal
880 nm, nominal
0.13 mW, minimum
0.79 mW, maximum
Pulse Rate (bpm)
During no motion conditions - Adults
During motion conditions - Adults
Resolution:
Saturation (SpO2%)
Pulse Rate (bpm)
Low Perfusion Performance4:
>0.02% Pulse Amplitude and %
Transmission > 5%
Alarms:
Visual
Audio
LNOP® DC-I, LNOP-Adt, LNCS PC-I, and LNCS-Adt
> 30 kg
± 2%
± 3%
± 3 bpm
± 5 bpm
± 2%
± 3 bpm
25 to 240 bpm ± 3 digits
25 to 240 bpm ± 5 digits
1%
1
Saturation (SpO2%) ± 2 digits
Pulse Rate ± 3 digits
Flashing SpO2 numerics or message
Alternating 1.5-second chimes
2036947-001
© 2013 by General Electric Company. All rights reserved.
Appendix A: Technical Specifications
Category
Interfering Substances
Operating Modes Specifications
Specifications
Carboxyhemoglobin may erroneously increase readings.
The level of increase is approximately equal to the amount
of carboxyhemoglobin present. Dyes, or any substance
containing dyes, that change usual arterial pigmentation may
cause erroneous readings
1) Accuracy specified when used with Masimo SET pulse oximetry modules using PC or LNC series patient cables. Numbers represent ± 1 standard
deviation. Plus or minus one standard deviation represents 68% of the population.SpO2 accuracy from 70% to 100%.Pulse Rate accuracy from 25 to 240
bpm.
2) The Masimo SET® SpO2 parameter with LNOP-Adt sensors has been validated for no motion accuracy in human blood studies on healthy adult
volunteers in induced hypoxia studies in the range of 70-100% SpO2 against a laboratory co-oximeter and ECG monitor. This variation equals plus or
minus one standard deviation. Plus or minus one standard deviation encompasses 68% of the population.
3) The Masimo SET SpO2 parameter with LNOP-Adt sensors has been validated for motion accuracy in human blood studies on healthy adult volunteers
in induced hypoxia studies while performing rubbing and tapping motions at 2 to 4 Hz at an amplitude of 1 to 2 cm and a non-repetitive motion before
1 to 5 Hz at an amplitude of 2 to 3 cm in induced hypoxia studies in the range of 70-100% SpO2 against a laboratory co-oximeter and ECG monitor.
This variation equals plus or minus one standard deviation. Plus or minus one standard deviation encompasses 68% of the population. Masimo SET
technology with LNOP and LNCS sensors have been validated with human blood studies on healthy adult volunteers with induced hypoxia studies. The
volunteer population composed of both men and women spanned a range of skinpigmentations from light to dark and ranged in age from 22 to 40
years old.
4) The Masimo SET SpO2 parameter has been validated for low perfusion accuracy in bench top testing against a Biotek Index 2 simulator and Masimo’s
simulator with signal strengths of greater than 0.02% and a % transmission of greater than 5% for saturations ranging from 70 to 100%. This variation
equals plus or minus, one standard deviation. Plus or minus one standard deviation encompasses 68% of the population.
NOTE: Because pulse oximeter equipment measurements are statistically distributed, only about two-thirds of pulse oximeter equipment measurements can be expected to fall within ± Arms of the value measured by a CO-Oximeter.
NOTE: Use of a functional SpO2 simulator to assess the accuracy of the CorometricsTM 250cx SpO2 parameter has not been demonstrated.
This device is covered under one or more of the following US Patents: 5,482,036;5,490,505;5,632,272;5,685,299; 5,758,644; 5,769,785; 6,002,952;
6,036,642; 6,067,462; 6,206,830; 6,157,850 and international equivalents. USA and international patents pending.
© 2013 by General Electric Company. All rights reserved.
2036947-001139
Appendix A: Technical Specifications
Operating Modes Specifications (Continued)
Category
Specifications
Maternal Pulse Oximetry Mode (Nellcor)
Technique:
Spectrophotometry and plethysmography.
1
SpO2 Range:
Sensor Type and Accuracy :
70%–100%:
OxiMax® Sensor Models
± 2 digits
MAX-A2,
± 3 digits
DS-100A
Saturation Range:
1–100%
Pulse Rate Range:
30–250 bpm
Accuracy:
Saturation (SpO2%)
Adults2
Low Perfusion3
Pulse Rate (bpm)
Adults
Wavelengths4:
Red
Infrared
Maximum Optical Output Power:
Response Time:
Alarms (audible and visual):
Audio
Visual
Limits
Technical
70%-100% ± 2 digits
70%-100% ± 2 digits
0%-69% unspecified
20 to 250 bpm ± 3 digits
660 nm, nominal
890 nm, nominal
< 15 mW
Fast
Alternating 1.5-second chimes
Flashing SpO2 numeric or message
User-selectable high and low SpO2; User-selectable high and
low pulse rate
Sensor errors, connection errors, insufficient signal,
communication problem, internal calibration error, or self-test
failure.
1) Accuracy specifications are based on controlled hypoxia studies with healthy, non-smoking adult volunteers over the specified saturation SpO2
range. Pulse oximeter SpO2 readings were compared to SaO2 values of drawn blood samples measured by hemoximetry. All accuracies are expressed
as ± “X” digits. This variation equals ± one standard deviation (± 1 SD), which encompasses 68%of the population. Oxygen saturation accuracy can be
affected by certain environmental and patient physiological conditions, as discussed in the operator’s manual for the monitor. Use Nellcor sensors only
with 250cx Series Monitors containing Nellcor oximetry. Consult individual manufacturers for accuracy specifications and compatibility information
of particular instruments and Nellcor sensor models. The volunteer population was composed of healthy men and women recruited from the local
population. The ages ranged from 18 to 50 years old, with variations of skin pigmentations.
2) Adult specifications are shown for OxiMax®MAX-A and MAX-N sensors with the N-600. Saturation accuracy will vary by sensor type.
3) Applicability: OxiMax® MAX-A, MAX-AL, MAX-P, MAX-I, and MAX-N sensors.
4) Information of wavelength range can be especially useful to clinicians performing photodynamic therapy.
NOTE: Because pulse oximeter equipment measurements are statistically distributed, only about two-thirds of pulse oximeter equipment measurements can be expected to fall within ± Arms of the value measured by a CO-Oximeter.
NOTE: Use of a functional SpO2 simulator to assess the accuracy of the CorometricsTM 250cx SpO2 parameter has not been demonstrated.
This device is covered under one or more of the following Patents: US Patent No. 4,802,486; 4,869,254; 4,928,692; 4,934,372; 4,960,126; 5,078,136;
5,485,847; 5,743,263; 5,865,736; 6,035,223; 6,298,252; 6,463,310; 6,591,123; 6,675,031; 6,708,049; 6,801,797; Re. 35,122; and foreign equivalents.
140
2036947-001
© 2013 by General Electric Company. All rights reserved.
Appendix B: Alarm Summary
Type
FHR
NIBP
Condition
An alarm setting (audio or high/low
limit) is turned off.
Visible Advisory
displays to the left of the
FHR mode title.
Alarm Defaults
Audio: on
Volume: 5
Limits: High = 160 bpm, Low = 120
bpm
FHR limit (high or low) actively being FHR numeric flashes.
violated.
or
Unsilenced, resolved FHR limit
violation (the limit was violated but
the FHR has since returned to the
normal range before clinical
acknowledgement).
For continuous limit violations:
a high alarm activates after 5
minutes; a low alarm activates after
30 seconds.
About Latching Alarms: The FHR
limit alarms are latching alarms
which means that a clinician must
acknowledge the alarm using the
monitor’s Alarm Silence button in
order to clear the alarm.
Inadequate FHR signal quality.
Flashing dashes “– – –” in place
of FHR numeric.
Systolic, diastolic, or MAP pressure
NIBP numeric (systolic, diastolic,
value (high or low) actively being
or MAP) flashes.
violated.
Malfunction with NIBP circuitry, cuff, CHECK CUFF, LEAK, COMM,
or air hoses.
MOTION, WEAK SIGNAL, or
REPAIR message displays in
NIBP area.
© 2013 by General Electric Company. All rights reserved.
Audible Advisory
Alternating high/low tones
(if audio enabled).
Alternating high/low tones
(if audio enabled).
Alternating high/low tones
(if audio enabled).
Alternating high/low tones
(if audio enabled).
2036947-001141
Appendix B: Alarm Summary
Type
MHR/P1
Condition
Alarm Defaults
Audio: on
Volume: 5
Limits: High = 120 bpm, Low = 50
bpm
Re-alarm: 120 sec
MHR/P limit (high or low) actively
being violated.
The tachycardia response time is <
8 seconds.
Asystole.
MECG leads off.
1
Visible Advisory
Audible Advisory
—
MHR/P numeric flashes.
Flashing dashes “– – –” in place
of MHR/P numeric.
Flashing dashes “– – –” in place
of MHR/P numeric and MECG
LEADS OFF message displays
underneath.
Alternating high/low tones
(if audio enabled).
Alternating high/low tones
(if audio enabled).
Alternating high/low tones
(if audio enabled).
There is an MECG re-alarm.
Alarm Defaults
Audio: on
Volume: 5
Limits: High = 100%, Low = 95%
Re-alarm: 120 sec
MSpO2
MSpO2 limit (high or low) actively
being violated. Issued after about 8
seconds.
Malfunction with MSpO2 circuitry.
MSpO2 intermediate cable
disconnected from monitor; sensor
assembly disconnected from
intermediate cable; or sensor or
cable has a broken wire.
142
2036947-001
—
MSpO2 numeric flashes. MSpO2
value and pulse rate print on
the strip chart.
COMM or REPAIR message
displays in MSpO2 area.
Alternating high/low tones
(if audio enabled).
Alternating high/low tones
(if audio enabled).
Dashes “– – –” in place of MSpO2 Alternating high/low tones
(if audio enabled).
numeric.
© 2013 by General Electric Company. All rights reserved.
Appendix C: Electromagnetic Compatibility
Changes or modifications to this system not expressly approved by GE Healthcare can cause EMC issues with
this or other equipment. This system is designed and tested to comply with applicable regulation regarding
EMC and must be installed and put into service according to the EMC information stated in this appendix.
WARNING:
Use of portable phones or other radio frequency (RF) emitting equipment near the system may cause
unexpected or adverse operation. The equipment or system should not be used adjacent to, or stacked
with, other equipment. If adjacent or stacked use is necessary, the equipment or system should be
tested to verify normal operation in the configuration in which it is being used.
C.1 Manufacturer’s Guidance and Declaration – Electromagnetic
Emissions
The CorometricsTM 250cx Series Maternal/Fetal Monitor is intended for use in the electromagnetic environment
specified below. It is the responsibility of the customer or user to ensure that the monitor unit is used in such
an environment.
Emissions Test
Compliance
RF Emissions
EN 55011
Group 1
RF Emissions
EN 55011
Class A
Harmonic Emissions
EN 61000-3-2
Class A
Voltage Fluctuations/
Flicker Emissions
EN 61000-3-3
Complies
© 2013 by General Electric Company. All rights reserved.
Electromagnetic Environment - Guidance
The equipment uses RF energy only for its internal function.
Therefore, its RF emissions are very low and are not likely to cause
any interference in nearby electronic equipment.
The equipment is suitable for use in all establishments other than
domestic and those directly connected to the public low-voltage
power supply network that supplies buildings used for domestic
purposes.
2036947-001143
Appendix C: Electromagnetic Compatibility
C.2 Manufacturer’s Guidance and Declaration – Electromagnetic
Immunity
The CorometricsTM 250cx Series Maternal/Fetal Monitor is intended for use in the electromagnetic environment
specified below. It is the responsibility of the customer or user to enssure that the monitor unit is used in such
an environment.
Immunity Test
EN60601 Test Leve
Compliance Level
Electromagnetic
Discharge (ESD) EN
61000-4-2
± 6 kV contact
± 6 kV contact
± 8 kV air
± 8 kV air
Electrical Fast
Transient/Burst
EN 61000-4-4
± 2 kV for power supply lines
± 2 kV for power supply lines
±1 kV for input/output lines
±1 kV for input/output lines
Surge
EN 61000-4-5
± 1 kV differential mode
± 1 kV differential mode
± 2 kV common mode
± 2 kV common mode
Electromagnetic
Environment – Guidance
Floors should be wood, concrete
or ceramic tile. If floors are
covered with synthetic material,
the relative air humidity should
be at least 30%.
Mains power should be that of
a typical commercial or hospital
environment.
Mains power should be that of
a typical commercial or hospital
environment.
<5% Ut (>95% dip in Ut) for 0.5 <5% Ut (>95% dip in Ut) for 0.5
cycles
cycles
Voltage dips, short
interruptions and
voltage variations
on power supply
input lines EN
61000-4-11
Mains power should be that of
a typical commercial or hospital
<40% Ut (>60% dip in Ut)for 5 <40% Ut (>60% dip in Ut) for 5 environment. If the user of the
equipment requires continued
cycles
cycles
operation during power mains
interruptions, it is recommended
<70% Ut (>30% dip in Ut)for 25 <70% Ut (>30% dip in Ut) for 25 that the equipment be powered
cycles
cycles
from an uninterruptible power
supply or a battery.
<5% Ut (>95% dip in Ut)for 5 s <5% Ut (>95% dip in Ut) for 5 s
Power Frequency
3 A/m
(50/60 Hz) Magnetic
Field EN 61000-4-8
3 A/m
Power frequency magnetic
fields should be at levels
characteristics of a typical
location in a typical commercial
or hospital environment.
NOTE: Ut is the AC mains voltage prior to application of the test level.
144
2036947-001
© 2013 by General Electric Company. All rights reserved.
Appendix C: Electromagnetic Compatibility
Immunity Test
EN6061 Test Level
Compliance Level
Electromagnetic Environment Guidance
Portable and mobile RF communications
equipment should not be used closer to any
part of the equipment, including cables,
than the recommended separation distance
calculated from the equation applicable
to the frequency of the transmitter.
Recommended separation distance
d = 1.2 √P
d = 1.2 √P 80 MHz to 800 MHz
Conducted RF
EN 61000-4-6
Radiated RF
EN 61000-4-3
3 Vrms
150 KHz to 80 MHz
3 V/m
80 MHz to 2.5 GHz
d = 2.3 √P 800 MHz to 2.5 GHz
3 Vrms
where P is the maximum output power
rating of the transmitter in watts (W)
according to the transmitter manufacturer,
and d is the recommended separation
distance in meters (m).
3 V/m
Field strengths from fixed RF transmitters,
as determined by an electromagnetic site
surveya, should be less than the compliance
level in each frequency rangeb.
Interference may occur in the vicinity
of equipment marked with the following
symbol:
NOTE: At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE: These guidelines may not apply in all situations. Electromagnetic propagation is affected by reflection
from structures, objects, and people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land
mobile radio, AM and FM radio broadcast, and TV broadcast cannot be predicted theoretically with accuracy.
To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey
should be considered. If the measured field strength in the location in which the equipment is used exceeds
the applicable RF compliance level above, the equipment should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as re-orienting or relocating
the equipment.
b
Over the frequency range 150 KHz to 80 MHz, field strengths should be less than 3 V/m.
© 2013 by General Electric Company. All rights reserved.
2036947-001145
Appendix C: Electromagnetic Compatibility
C.3 Recommended Separation Distances
The table below provides the recommended separation distances (in meters) between portable and mobile RF
communications equipment and the CorometricsTM 250cx Series Maternal/Fetal Monitor.
The monitor unit is intended for use in the electromagnetic environment on which radiated RF disturbances
are controlled. The customer or the user of the monitor unit can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and the monitor unit as recommended below, according to the maximum output power of the communications
equipment.
Separation Distance in Meters (m) According to Frequency of Transmitter
Rated Maximum Output
Power of Transmitter (W)
150 kHz to 80 MHz a
d = 1.2√P
80 MHz to 800 MHz a
d = 1.2√P
800 MHz to 2.5 GHz a
d = 2.3√P
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
a
For transmitters rated at a maximum output power not listed above, the recommended separation distance [d]
in meters (m) can be estimated using the equitation applicable to the frequency of the transmitter, where P is
the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE: These guidelines may not apply in all instances. Electromagnetic propagation is affected by absorption
and reflection from structures, objects and people.
C.4 Compliant Cables and Accessories
WARNING:
The use of accessories, transducers and cables other than those specified may result in increased
emissions or decreased immunity performance of the equipment or system.
The table below lists cables, transducers, and other applicable accessories with which GE Healthcare claims
EMC compliance.
NOTE: The supplied accessories that do not affect EMC compliance are not included.
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© 2013 by General Electric Company. All rights reserved.
Appendix C: Electromagnetic Compatibility
Part No
Description
Maximum Lengths
ECG Cables
1442AAO
Y Adapter Cable Maternal/Fetal ECG, Rectangular
.46 m /18 in
1442BAO
FECG Socket Adapter
.46 m /18 in
1553AAO
Multi-Link Cable, 3 Lead ECG Maternal, AHA, Rectangle
3.6 m / 12 ft
1553BAO
Multi-Link Cable, 3 Lead ECG Maternal, IEC, Rectangle
3.6 m /12 ft
1564AAO
120 Recorder Cable MECG
3.6 m /12 ft
1590AAO
Qwik Connect Plus cable (Round)
2.4 m / 8 ft
1591AAO
Qwik Connect Plus FSE Cable (Leg Plate Cable), Rectangle
2.4 m / 8 ft
412682-001
Leadwire set, AHA Grabber
N/A
412682-003
Leadwire set, IEC Grabber
N/A
Fetal Spiral Electrodes, Qwik Connect Plus
N/A
7000AAO
Intrauterine Pressure Catheters
2076CAO
COROMETRICS ACCU TRACE IUPC, 10/CARTON
N/A
1336DAO
IUPC Cable ACCUTRACE, COROMETRICS
3.6 m / 12 ft
SpO2 / Pulse Oximetry Cables and Sensors
407705-006
Nellcor DuraSensor Reusable Finger Probe
N/A
2016041-001
Masimo SpO2 patient adapter cable
3.6 m / 12 ft
2017002-003
MASIMO MSpO2 INTERMED CABLE, 120 SERIES
N/A
2002800-001
MASIMO reusable finger sensor
N/A
2023597-001
MASIMO SET adult reusable finger sensor
N/A
2025350-001
Nellcor MSpO2 INTERMED CABLE, 120 SERIESN/
N/A
Nellcor OXYGEN XDCRS
N/A
170053
®
TOCO Cables
2264HAX
Nautilus Tocotransducer Cable, Loop Style
2.4 m / 8 ft
2264LAX
Nautilus Tocotransducer Cable, Button Style
3 m / 10 ft
5700HAX
Nautilus Ultrasound Transducer Cable, Loop Style
2.4 m / 8 ft
5700LAX
Nautilus Ultrasound Transducer Cable, Button Style
3 m / 10 ft
Ultrasound Cables
Accessories
0146AAY
Fetal Acoustic Stimulator (FAST)
2.4 m / 8 ft
1426CAO
Interface cable, HP OBMS / ODIS
1.83m / 6 ft
1426DAO
Interface cable, HP OBMS / ODIS
3.6 m / 12 ft
1558AAO
120 to QS Comm Cable
3 m / 10 ft
1558AAO
120 to QS Comm Cable
3 m / 10 ft
1558BAO
120 to QS Comm Cable
6 m / 20 ft
1562AAO
120/Critikon Interface cable
0.3 m / 1 ft
1562BAO
120/Critikon Interface cable
1.83m / 6 ft
1563AAO
120/340 Interface cable
3 m / 10 ft
© 2013 by General Electric Company. All rights reserved.
2036947-001147
Appendix C: Electromagnetic Compatibility
Part No
Description
Maximum Lengths
1567AAO
120/Traceview Cable, HP Mon to Traceview 120
3 m / 10 ft
1568AAO
120/Traceview Adapter Cable
.36m / 1 ft
1569AAO
120/Peritronics Cable, Cent Surv Intfc Cbl 120
3 m / 10 ft
1580AAO
Cable Assy, 120 to WATCHCHILD
3 m / 10 ft
2007234-001
Cable, Coro – DINAMAP PRO Series
3 m / 10 ft
2116BAX
2116B Data Entry System
N/A
3919BAO
Remote Event Marker
2.4 m / 8 ft
600028
AC cord, Hospital grade, AHA
2.4 m / 8 ft
600034
AC Cord, Hospital Grade, IEC
2.4 m / 8 ft
600049
AC Cord, Hospital Grade, UK
2.4 m / 8 ft
401855-110
AC Cord, Hospital Grade, Australia / New Zealand
2.5m / 8.2ft
919 200 37
Potential Equalization cable
3 m / 10 ft
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© 2013 by General Electric Company. All rights reserved.
Appendix D: PS320 Fetal Simulator Setup
The Fluke® PS320 fetal simulator provides fetal ECG, maternal ECG, ultrasound, and uterine activity simulation
signals for testing and troubleshooting of fetal monitors. PS320 fetal simulator operates on a 9V battery and
simulates several fetal parameters, including twins. An optional mechanical heart creates fetal heart sounds
for testing fetal monitor ultrasound cables and transducers.
D.1 Parts Required
Below parts are required to perform all the necessary tests on CorometricsTM 250cx Series monitors using a
PS320 fetal simulator:
1. Parts to be ordered from Fluke® Biomedical:
• One PS320 Fetal Monitoring Kit for GE Corometrics (Fluke part number: 2794057): This kit includes the
following items:
-- One PS320 fetal simulator unit
-- One MFH-1 Mechanical Heart Probe and Fetal Heart Cable
-- One Ultrasound Simulation Cable for Corometrics
-- One External TOCO Simulation Cable for Corometrics
-- One IUP TOCO Simulation Cable for Corometrics
-- One RS-232 Cable
-- Operator Manual, Battery, and Battery Eliminator
NOTE: The above information is extracted from Fluke® Biomedical website and might change without an
advanced notice. Always visit Fluke® Biomedical website (www.flukebiomedical.com) before ordering
parts to get the latest ordering information.
2. Parts to be ordered from GE Healthcare:
• One Coro250cx ECG Cables FRU Kit (GE Part number: 2025177-055): This kit includes one FECG
simulation cable and one MECG simulation cable.
© 2013 by General Electric Company. All rights reserved.
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Appendix D: PS320 Fetal Simulator Setup
D.2 PS320 Fetal Simulator Setup
This section provides instructions to perform the PS320 fetal simulator setup.
NOTE: The PS320 fetal simulator needs periodic calibration. Always use a calibrated PS320 unit for performing
tests.
1. Connect the ECG/US/TOCO simulation cables to their corresponding connectors on PS320 fetal simulator
and CorometricsTM 250cx Series monitor unit as illustrated in Figure D-1.
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Appendix D: PS320 Fetal Simulator Setup
Figure D-1 PS320 Setup
NOTE: For FECG connection, use Fetal, Fet/Mat, and Reference connectors on the PS320 simulator. For MECG
connection, use Fet/Mat, Maternal, and Reference connectors on the PS320 simulator.
2. Turn on the monitor unit and the PS320 fetal simulator.
3. The PS320 default settings (see below) are active. Use PS320 front panel keys to change the fetal ECG rate/
amplitude, maternal ECG rate/amplitude, TOCO level and sensitivity if necessary. Press the Enter key to
confirm selections.
PS320 default settings:
US1 = 150 BPM (static), US2 = NORMAL, FETAL ECG = 150 BPM (Sensitivity 1 µV), MAT. ECG = 80 BPM (Sensitivity 1 µV), TOCO = 00 (Sensitivity 5 µV)
4. For additional settings, use the Main, Sub, and Scrolls keys of PS320 front panel to access the different
parameters to set. Press Enter to confirm the selection and make the change.
5. Use the View key at any time to see the currently-active settings on the PS320 unit.
NOTE: For detailed information about operating the PS320 fetal simulator, refer to the PS320 user’s manual
available to download at Fluke® Biomedical website (www.flukebiomedical.com).
© 2013 by General Electric Company. All rights reserved.
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Appendix D: PS320 Fetal Simulator Setup
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© 2013 by General Electric Company. All rights reserved.
Appendix E: Service Mode Screens
The CorometricsTM 250cx Series monitor provides a variety of options that are selected in the setup screens on
the display using the Trim Knob Control. Depending on the intended user, the setup screens can generally be
categorized into two groups:
a. Operator setup screens: These screens are available and intended for the operator’s use. The operator
can access the following setup screens: FECG, US, US2, Maternal NIBP, MSpO2, MHR/P, Master Alarm,
VSHX, and General Setup. For detailed information on setup screens, refer to CorometricsTM 250cx Series
Monitor Operator Manual.
b. Service mode screens: These screens are password-protected and intended for the use of authorized
service personnel only. The monitor has five service mode screens: Service Lock, Install Options Screen
1 and 2, Communications Setup, Error Log, Diagnostic Control, J102, and NIBP Calibration
This appendix covers the information about the service mode screens and the description of fields in each
screen.
© 2013 by General Electric Company. All rights reserved.
2036947-001153
Appendix E: Service Mode Screens
E.1 Service Lock Screen
The Service Lock screen (See Figure E-1) is the first screen when entering the monitor service mode.
Figure E-1 Service Lock Screen
To access this screen:
1. Select the Setup softkey in the General screen to display the General Setup screen.
2. Select the Service softkey from the General Setup screen.
3. The Service Lock screen appears and the access code is displayed as 0 0 0 0.
The Service Lock screen requires the user to enter a password to prevent unauthorized access to the service
mode. The access code is the current month and day (MMDD) or day and month (DDMM), depending on how
the monitor is configured. Use the Trim Knob Control to enter the access code. For example: April 23 shall be
entered 0 4 2 3. The screen also displays the following information:
• Keypad Version
• MSpO2 information:
о For Nellcor: Nellcor 506 or NELL-3 Version and Date
о For Masimo: DSP: Version, MCU: Version, PID: Version
• NIBP Version
• CPU Version
• DSP Version
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Appendix E: Service Mode Screens
E.2 Install Options Screens
Upon entering the correct access code in Service Lock screen and pressing the Trim Knob Control, the monitor
displays Install Options Screen 1 (See Figure E-2). This screen includes the following option fields to configure:
Figure E-2 Install Options Screen 1
• Language: This field is used to set the language shown on the display and printed on the strip chart
recorder paper. Use the Trim Knob Control to cycle through the available options: English, Spanish, French,
German, Dutch, Swedish, Italian, Danish, Finnish, and Norwegian.
NOTE: The correct country language is set at the factory prior to shipment of the product to the target
country.
• Line Frequency: This field is used to set the line power frequency for the country in which the monitor is
being used. Use the Trim Knob control to alternate between 50 Hz and 60 Hz.
NOTE: The correct country line power frequency is set at the factory prior to shipment of the product to the
target country.
• Scaling: This field is used to set the heart rate scale for the strip chart paper. Use the Trim Knob Control to
alternate between 30–240 bpm/cm and 50–210 bpm/cm. The MSpO2 trend Auto scale is also affected by
this setting. When the heart rate scale is 30–240, the MSpO2 expanded scale is 60–100% (10%/cm). When
the heart rate scale is 50–210, the MSpO2 expanded scale is 50–100% (12.5%/cm).
NOTE: The correct country scaling is set at the factory prior to shipment of the product to the target
country.
• Recorder Font Size: This field offers three font size options for print annotations:
о Small: This option results in print speed increase.
о Medium: This option is a compromise between the large and small sizes.
о Large: This option fosters readability.
© 2013 by General Electric Company. All rights reserved.
2036947-001155
Appendix E: Service Mode Screens
• VS Print Interval: This field provides two options for the printing of blood pressure and MSpO2 values on the
strip chart paper:
о Real-Time: Values are printed according to the actual clock time (9:33, 9:48, 10:03, etc.).
о Chart-Style: Values are printed on standard clock quarter (9:00, 9:15, 9:30, 9:45, etc.), half hour (9:00,
9:30, 10:00, 10:30, etc.), and whole hour (9:00, 10:00, 11:00, 12:00, etc.) marks.
• Paper Chime: This field enables/disables an audible tone to indicate a low-paper or out-of-paper condition.
о Off: No audio tone is generated during a low-paper or out-of-paper condition (the Recorder LED
blinking will still be present).
о Low/Out: An audio tone is generated during a low-battery or out-of-paper condition.
о Out Only: An audio tone is generated only during an out-of-paper condition.
• Paper Volume: This field sets the volume of the paper chime. As the volume is adjusted, a sample tone is
generated. You can choose from a range of 1 to 9 (1 = lowest, 9 = loudest).
• HBC (Heartbeat Coincidence): This field is used to enable/disable the heartbeat coincidence feature. The
feature alerts the user when monitoring a duplicate signal is likely. Heartbeat coincidence is indicated
when any two heartbeats have a consistent phase relationship for equal to or greater than 60% of
the detected beats for about 60 seconds. The cessation of coincidence is indicated when the phase
relationship is inconsistent for greater than 40% of the detected beats for about 7 seconds. When
heartbeat coincidence detection is enabled, the acronym HBC appears to the right side of the FHR2 mode
title.
• HR Offset: This field is used to enable/disable the secondary offset feature. When monitoring dual heart
rates using US/US2 or FECG/US, overlapping traces may be difficult to interpret. All CorometricsTM 250cx
Series monitors provide a +20 bpm shift for the secondary fetal heart rate trend to alleviate this problem.
When using US/US2 or FECG/US2, and the US2 trace is shifted +20 bpm, the
symbol prints on the
upper portion of the top grid every 4.5 cm. When using US/FECG, and the US trace is shifted +20 bpm, the
symbol prints on the upper portion of the top grid every 4.5 cm. In both cases, an arrow (→) and a
vertical dashed line are printed to draw attention to the start of the shifted trend.
Use the Trim Knob Control to cycle through below available options:
о 10 min: The heart rate offset mode is enabled with an auto-revert feature. If the trace is shifted by
the user, the heart rate will revert back to the normal (unshifted) level after 10 minutes. This option
is the factory default setting.
о On: The heart rate offset mode is enabled. If the user shifts a trace, the trace will remain shifted until
the user manually sets the trace back to normal (unshifted level).
о Off: The heart rate offset mode is disabled. The user cannot shift traces.
• FM Remote Mark: This field configures the marker annotation that is printed on the strip chart paper
whenever a patient presses the button on the Remote Marker accessory. Use the Trim Knob Control to
alternate between On and Off. The factory default setting is Off. The ( ) annotation is commonly used
to record an event while the (F
perceived fetal movement.
156
M
) annotation is commonly used as an indication that the mother has
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© 2013 by General Electric Company. All rights reserved.
Appendix E: Service Mode Screens
• SpO2 Scale: This field is only available on CorometricsTM 259cx model. Two below scale options can be
selected for printing the MSpO2 trends. The scale is printed on the paper along with the trend.
о Auto: The trend plots on an expanded scale of 60–100% or 50–100%, depending on the paper*.
о 0–100%: This option configures the MSpO2 trend to always plot at a fixed scale of 0–100%.
* The MSp02 trend is plotted over a range of 60-100% on paper with a HR scale of 30-240 bpm. The MSp02 trend is plotted over a range of 50-100% on paper with a HR scale of 50-210 bpm.
Use the Trim Knob Control to select NextPage softkey on the bottom of Install Options Screen 1 screen to
access Install Options Screen 2 screen (See Figure E-3). This screen includes the following option fields to
configure:
Figure E-3 Install Options Screen 2
• Fetal Alert/Alarms: If the Spectra Alerts option is installed on the monitor, use this field to select between
the built-in FHR alarm features of the monitor and the Spectra Alerts option.
о Alarms: The monitor generates alarms based on the limit settings provided on the FHR setup
screens.
о Alerts: Enables the Spectra Alerts feature to analyze heart rate and uterine activity data to detect
certain abnormal trends and alert the clinician.
• Alert Suspend: This field let the user to suspend the audio component of alerts.
о Off (disabled): This option will disable the user to suspend audio alerts.
о On (enabled): This option will enable the user to manually activate/de-activate the function.
• Re-Alarm: This field adjusts the temporary silence period. An audio alarm is cancelled using the Alarm
Silence button. However, for MECG and MSpO2 monitoring and during a paper-load error condition, an
alarm will be re-issued if the alarm state continues after a specified amount of time.
• FECG Artifact Elimination: This field is used to enable/disable FECG Artifact Elimination feature which only
affects the direct FECG mode. Use the Trim Knob Control to alternate between On and Off (The factory
default setting is Off.). When On is selected, any new heart rate value which differs by more than ±25 bpm
© 2013 by General Electric Company. All rights reserved.
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Appendix E: Service Mode Screens
from the previously calculated heart rate is not printed on the strip chart paper. When Off is selected, all
heart rate values are printed on the strip chart paper without regard to previous rates.
When FECG artifact elimination is turned on, the monitor does not print any new FHR value which differs by
more than ±25 BPM from the previously calculated heart rate value. The printing inhibition functions on a
beat-to-beat basis by comparing the last calculated rate against the newly calculated rate. The rate used
for comparison purposes is always the previous rate regardless of whether this rate passed the previous
±25 BPM test. When FECG artifact elimination is turned off, the direct FECG rate is plotted by the recorder
without regard to its deviation from the previous rate. The effect of this function change is that sudden
heart rate changes (such as certain arrhythmias, accelerations or decelerations) as well as artifactual
changes (as when the electrode is disturbed or loosely connected) are recorded when FECG artifact
elimination is turned off. They are not recorded when FECG artifact elimination is turned on; instead gaps
(pen lift) in the tracing occur.
• Default TOCO Reference: This field sets the default uterine activity pressure reference for the TOCO
transducer. Use the Trim Knob Control to cycle through the available settings: 5, 10, 15, 20, or 25 relative
units in mmHg mode or 0.7, 1.3, 2.0, 2.7, or 3.3 in kPa mode. (The factory default setting is 10 in mmHg
mode or 1.3 in kPa mode.)
When using a TOCO transducer, momentary depression of the UA Reference button sets the pressure
baseline at the default setting. Pressing the UA Reference button for more than 2 seconds causes the UA
reference value to override the default setting and cycle through all available selections: 5, 10, 15, 20, or
25 relative units in mmHg mode or 0.7, 1.3, 2.0, 2.7, or 3.3 in kPa mode, starting at the default setting until
the button is released. This value is stored as the new baseline for the currently measured uterine activity
signal; as soon as the UA Reference button is momentarily pressed, the baseline returns to the default
value.
• Smart BP: This field is only available on CorometricsTM 259cx model. The feature prevents an automatic
blood pressure determination from occurring during a uterine contraction. This feature reduces the
chances for erroneous vital signs readings and also reduces patient discomfort during labor.
• NIBP 1 min Interval: This field is only available on CorometricsTM 259cx model. The field is used to enable/
disable the 1 minute interval selection on the maternal BP Setup screen. Use the Trim Knob Control to
alternate between On and Off (The factory default setting is Off.).
• NIBP Display: This field is only available on CorometricsTM 259cx model. The field determines the time
period (in minutes) that a blood pressure reading remains displayed before being automatically erased*,
starting from the time the reading is displayed. Setting this field to a value reduces the chance of error.
Setting this field to On leaves the blood pressure reading displayed indefinitely and could potentially cause
confusion. For Example: if the monitor is configured for manual mode and one hour has elapsed since the
last reading, the continuous display of the “old” NIBP reading may cause confusion.
* Values are removed from the NIBP area of the display only; values are still retained in memory for display and
printing in the Maternal Vital Signs History screen.
• Pressure Units: This field allows the user to choose pressure units: mmHg or kPa.
• SatSeconds: This field is only available on CorometricsTM 259cx model. The field sets a limit to control the
time that the SpO2 level may fall outside the alarm before an audible alarm sounds (The factory default
setting is 10). The limit can be set to: Off, 10, 25, 50, or 100.
• Default Settings: The setup screens of CorometricsTM 250cx Series monitors are set to factory defaults in
the factory before shipment to the customers. This field determines the settings that the monitor loads and
uses on the next power-on or restart. The field provides two options:
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Appendix E: Service Mode Screens
о Factory: Select this option to make all monitor settings revert back to the factory default settings
(See section E.9.2) on the next power-on or restart.
о Hospital: Select this option to let the monitor utilizes the hospital-preferred settings (not the factory
default ones) on the next power-on or restart.
NOTE: The hospital-preferred settings will take into effect only after the user stores the settings using Store
Current To Hospital field before turning off or restarting the monitor unit.
• Store Current To Hospital: Select this option to store the current monitor settings as the hospital-preferred
default settings. When you select this option, the Default Settings field will reflect the change (i.e., Default
Settings field changes to Hospital).
E.3 Printing Setup Information
Use the Trim Knob Control to select the PrintAll softkey on the bottom of Install Options Screen 1 screen to see
an overall summary of the monitor setup screens. A screen capture of each system setup screen (user and
service) will be printed on the strip chart paper.
Diagnostic Control, Communications Setup, Install Options, General Setup, Master Alarm Setup, Vital Signs
History, MSpO2 Setup, MHR/P Setup, NIBP Setup, FECG Setup, US Setup, US2 Setup
NOTE: The FECG, US, and US2 Setup screens are shown together in one group. The HR Offset field is separated
on this summary screen, since it may appear on either the US or the US2 Setup screen—depending on
the active connectors.
E.4 Communications Setup Screen
The Communications Setup screen (See Figure E-4) let the user configure the J109, J110, and J111 RS-232C
Serial Interface ports of the monitor unit for connecting to optional peripheral equipment. Each port is
configured for baud rate and mode.
Figure E-4 Communications setup Screen
© 2013 by General Electric Company. All rights reserved.
2036947-001159
Appendix E: Service Mode Screens
Select the COMM softkey on Install Options Screen 1 screen to access the Communications Setup screen and
set below fields:
• Baud rate: This field sets the baud rate for communication with an external device. Use the Trim Knob
Control to cycle through the available settings: 600, 1200, 2400, 4800, 9600, and 19,200 bps. Each port is
factory set to 2400 bps.
• Mode: This field selects the mode for communication with an external device. Use the Trim Knob Control to
cycle through the available settings: Nellcor, Factory, Critikon, 1371, 1371/NOTES, LOOPBACK, 115, 115 X/R,
and Exergen TAT. Each port is factory set to the 1371/Notes mode.
NOTE: The monitor with the factory settings is ready for connection to a Centricity Perinatal system.
E.5 Error Log Screen
The Error Log screen displays a service log of the monitor unit and is useful for diagnosing intermittent
problems (See Figure E-5). There are 255 error codes that can be detected by the monitor. The Error Log is
comprised of multiple pages with up to 20 error codes per screen. Each screen displays three columns:
• The Error ID column lists the error code. The Count column lists the number times the error code has
occurred.
• The Data column lists other information associated with the error code. This column is for factory use only.
Figure E-5 Error Log Screen
To access the Error Log screen, follow the below instructions:
1. Select the Log softkey from Install Options Screen 2. The first Event Log screen displays.
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Appendix E: Service Mode Screens
2. Use the Page softkey to display the next screen (page), if applicable. The last page wraps back to the first
page.
3. Use the Print softkey to print the displayed screen (page) on the strip chart recorder.
4. Use the Clear softkey to clear all the error log from the battery-backed RAM.
E.6 Diagnostic Control Screen
The Diagnostic Control screen is used to perform some diagnostic self-tests (See Figure E-6). Select Tests
softkey in Install Options Screen 1 screen to access the Diagnostic Control screen.
Figure E-6 Diagnostic Control Screen
This screen includes the following fields to select:
• Recorder Calibration: This test provides a method of testing the recorder calibration alignments. Use the
Trim Knob Control to set the recorder calibration field on the Diagnostic Control service mode screen to On.
The recorder prints four continuous horizontal lines at 0 mmHg, 30 bpm, and 240 bpm and the minimum
and maximum rates on the HR scale (30 bpm and 240 bpm for domestic paper, 50 bpm and 210 bpm
for international paper). The recorder prints a vertical line spanning across both grids every 3/16 inch.
Use this test while performing recorder offset adjustments in section 5.11.1 and See 5.11.2. The test will
continue to print the lines until you cycle power on the monitor or set the calibration field on the Diagnostic
Control screen back to Off.
• Status Relay: This softkey tests Nurse Call Interface relay.
• CPU: This field displays the software version number of the main processor installed on the Main Board of
the monitor unit.
• DSP: This field displays the software version number of the processor installed on the DSP Board of the
monitor unit.
© 2013 by General Electric Company. All rights reserved.
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Appendix E: Service Mode Screens
• Run Time: This field displays the amount of time the monitor has been turned on since the last time that
this field was cleared. The time is displayed in hours, minutes, and seconds. To clear this field (reset the
timer), activate the Clear softkey to the right of the run time field.
NOTE: The Clear softkey also resets the Rec Time field.
• Rec Time: This field displays the amount of time the recorder has been turned on (or printing in maternalonly mode) since the last time that this field was cleared. The time is displayed in hours, minutes, and
seconds. To clear this field (reset the timer), activate the Clear softkey to the right of the recorder time field.
NOTE: The Clear softkey also resets the Run Time field.
• Clear softkey: This softkey sets the monitor run time and recorder record time to 0:00.
• SW1: This field shows the setting status of SW1 switch on the Main Board (See Table 1-2). Below is an
example of the SW1 switch status:
E.7 J102 Screen
Select J102 softkey in Diagnostic Control screen to access J102 screen (See Figure E-7).
This screen displays five columns:
-- Pin: refers to the physical pin number of the connector.
-- Signal: refers to the signal description.
-- Range: refers to the expected range of outputs under normal operating conditions.
-- Voltage: refers to the actual voltage at the pin with the ground referenced to Pin 3 (ANALOG GND).
-- Meaning: refers to the intended interpretation of the voltage indicated in the voltage field.
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© 2013 by General Electric Company. All rights reserved.
Appendix E: Service Mode Screens
.
Figure E-7 J102 Test Screen
The Range and Voltage fields can be displayed using a decimal point or a comma as a separator. Each
activation of the Decimal softkey at the bottom of the screen alternates between using a decimal and a
comma. To test J012 pin outputs, rotate the Trim Knob Control to the desired row (Pin). The cursor can only
move up and down through the last column. Once the desired row is selected, press the Trim Knob Control. The
current setting (Meaning) displays in blinking inverse video. Now use the Trim Knob Control to cycle through
the settings. The values in the Meaning column and the Voltage column change accordingly. This same voltage
should be seen at the J102 Connector Pin. Once the desired value/pin is tested and calibrated, press the Trim
Knob Control again to end the value test. The current value setting stops blinking.
E.8 NIBP Calibration Screen
This screen is used to perform the NIBP Calibration Check procedure (See section 4.4.1). Select NIBP Cal softkey
in Diagnostic Control screen to access NIBP Calibration screen which includes one option field:
• Mode: This field allows the user to start/stop the sub-procedures: Calibration Verification, Transducer,
Calibration, Overpressure Detection, or System Leakage.
E.9 Setup Screen Defaults
This section lists all the setup screens and shows the field options plus the selected option in the factory
(factory default settings) for each field in each setup screen.
© 2013 by General Electric Company. All rights reserved.
2036947-001163
Appendix E: Service Mode Screens
E.9.1 Operator Setup Screens
Operator Setup
Screen
Field Name
FHR Volume
FECG or
US/US2
FHR Alarm Limits
Audio Alarms
Volume
Initial Target Pressure
Mode
NIBP
MSpO2
NIBP Done Vol
Alarm (mmHg mode)
Systolic
Diastolic
MAP
MHR/P
Volume
Response Time
(Nellcor 506)
Response Time
(Nellcor 506)
Averaging Time
(Masimo)
Sensitivity (Masimo)
Print Interval
%O2 Trace
Alarms
MSpO2
MHR/P
Volume
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Field Options
Factory Default Option
(set in the factory)
HospitalPreferred
Option
0-9
5
200-140, Off
High
Low
60-140, Off
160bpm
120bpm
On, Off
On
1-9
5
100-250 mmHg in
increments of
135 mmHg
5 (13.3-33.3 kPa in
(18.0 kPa)
0.7 steps)
Manual, 1, 2, 3, 4, 5,
10, 15, 20, 30, 40,
Manual
45, 60, 90, 120 min
0-9
5
High
Low
High
Low
70-240
70-150 160 mmHg 90 mmHg
50-150
30-120 50 mmHg 50 mmHg
70-130 100-250 140 mmHg 50 mmHg
30-120
35-120
120 bpm
50 bpm
1-9
5
Normal, Fast
Fast
Fast
Fast
2, 4, 8, 10, 12, 14, 16
seconds
Normal, Maximum
Off, 2, 5, 10, 15, 30,
60 minutes
On, Off
High
Low
85-100
80-99
100-250 35-120
1-9
8 seconds
Normal
5 minutes
Off
High
100
120
Low
95%
50 bpm
5
© 2013 by General Electric Company. All rights reserved.
Appendix E: Service Mode Screens
Operator Setup
Screen
Field Name
Source
MHR/P Trace
Volume
MHR/P
Alarms
Alarm Volume
MECG Lead
Pacer
(Waveform Display)
Normal Operation
(MECG Waveform Size)
Master Alarm Setup
Alarm Limits (mmHg)
Systolic
Diastolic
MAP
MHR/P
MSpO2
Alarm (kPa mode)
Systolic
Diastolic
MAP
MHR/P
Volume
© 2013 by General Electric Company. All rights reserved.
Field Options
Factory Default Option
(set in the factory)
HospitalPreferred
Option
Auto, MECG, MSpO2,
Auto
NIBP
On, Off
Off
0-9
0
High
Low
High
Low
100-250 35-120
120
50 bpm
1-9
5
I, II, III
II
On, Off
Off
FECG, MECG, MSpO2,
MECG
Off
0.25X, 0.5X, 1X, 2X,
1X (1 mV/cm)
4X, Auto
High
Low
High
Low
70-240
50-150
160
90mmHg
70-130
30-120
90
50mmHg
70-150
30-120
140
50mmHg
100-25
35-120
120
50bpm
85-100
80-99
100
95%
High
Low
High
Low
9.3-32.0 6.7-20.0
21.3
12.0kPa
9.3-17.3 4.0-16.0
12.0
6.7kPa
9.3-20.0 4.0-16.0
18.7
6.7kPa
100-250 35-120
120
50bpm
1-9
5
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Appendix E: Service Mode Screens
Operator Setup
Screen
Field Name
Song Volume
Brightness
Off, Happy Birthday,
Brahms’ Lullaby,
Rock-a-Bye-Baby,
All
0-9
0-9 (nine = brightest)
Paper Speed
1-3 cm/min
Play Song
General Setup
166
5
9
United States: 3 cm/min
International: 1 cm/min
Set to current local
date
Set to current local date
Time
Set to current local
date
Set to current local time.
Must manually change
to EST/EDT.
HX Interval
2036947-001
Off, 2, 5, 10, 15, 30,
60 min
Off, 2, 5, 10, 15, 30,
60 min
Off, On
1, 5, 10, 15, 30, 60,
Event
HospitalPreferred
Option
Off
Date
MSpO2 Print Interval
(External Monitor)
FSpO2 Print Interval
(External Monitor)
FSpO2 Trace
Vital Signs
History
Field Options
Factory Default Option
(set in the factory)
5 min
5 min
Off
Event
© 2013 by General Electric Company. All rights reserved.
Appendix E: Service Mode Screens
E.9.2 Service Mode Screens
Service Setup
Screen
Field Name
Language
Line Frequency
Scaling
Recorder Font Size
Install
Options
Screen 1
(Service)
FECG Artifact
Elimination
Paper Chime
Paper Chime Volume
HBC (Heartbeat
Coincidence Enable)
HR Offset
(Applies to US or US2—
whichever is FHR2)
FM (Fetal Movement)
Remote Marker
SpO2 Scale
© 2013 by General Electric Company. All rights reserved.
Field Options
Set according to
shipping destination
50 Hz, 60 Hz
United States:
30–240 bpm
International:
50–210 bpm
Small, Medium,
Large
On, Off
Factory Default Option
(set in the factory)
HospitalPreferred
Option
Set according to
shipping destination
United States: 60 Hz
International: 50 Hz
United States: 30–240
bpm
International: 50–210
bpm
Medium
Off
Off, Low/out, Out
only
1-9
Out only
5
On, Off
On
Off, On, 10 min
10 min
On, Off
On
Auto, 0-100%
(Does not change)
0–100%
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Appendix E: Service Mode Screens
Service Setup
Screen
Field Name
Fetal Alert/Alarm
Alert Suspend
Re-Alarm
(MECG and SpO2 only)
VS (Vital Signs) Print
Interval
Install
Options
Screen 2
(Service)
Default TOCO
Reference
Smart BP
NIBP 1-min Interval
NIBP Display
Pressure Units
SatSeconds (Nellcor)
Default Settings
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Field Options
Factory Default Option
(set in the factory)
HospitalPreferred
Option
Off, Alarms, Alerts
Off
On, Off
Off
120 - 300 seconds
in 5-second
120 seconds
intervals
Real Time, Chart
Real Time
Style
5, 10, 15, 20, or 25
relative units in
10 in mmHg mode or 1.3
mmHg mode or 0.7,
in kPa modes
1.3, 2.0, 2.7, or in 3.3
kPa mode
On, Off
On
On, Off
On
On, 1, 2, 3, 5, 10, 15,
On
30 min
mmHg
mmHg, kPa
China: kPa
Off, 10, 25, 50, 100
10
Factory, Hospital
Factory
© 2013 by General Electric Company. All rights reserved.
Appendix F: CPU Software Upgrade
This section provides instructions to upgrade the CPU software of the CorometricsTM 250 series monitors.
F.1 Tool Requirement
• Windows® Computer or Laptop
• Software Installation CD-ROM
• Serial Port Flasher Cable (Part number: 1203AAO) for computers/laptops with a serial port OR USB
flasher cable (Part number: 2024454-001) for computers/laptops with a USB port
F.2 Upgrade Procedure
1. Before starting the upgrade, check the CPU software version of the monitor in Diagnostic Control screen to
confirm that the current version of the CPU software is less than the software version of the upgrade CD.
NOTE: The instructions in this procedure are only for upgrading the CPU software to a higher version. The
software upgrade program does not support upgrading the CPU software to the same software version.
2. Turn off the monitor.
3. Attach the flasher cable to the serial communications port (COMM1, COMM2, COMM3, or COMM4) of the
computer/laptop and to the J110 port on the rear side of the monitor.
4. Turn the computer/laptop on.
CAUTION:
Make sure your laptop is connected to an external power source. Serial ports may not work properly
on the laptops running on the internal battery power.
5. Turn the monitor on.
6. Use the Trim Knob Control on the monitor to access the Communication Setup screen in the service mode
and change the J110 port mode setting to FACTORY and the baud rate to 9600.
7. Access the Install Options Screen 2 screen and set Default Settings to Hospital and then select the Store
Current to Hospital to save the settings.
© 2013 by General Electric Company. All rights reserved.
2036947-001169
Appendix F: CPU Software Upgrade
8. Insert the software installation CD-ROM into the CD-ROM drive of the computer or laptop.
9. Locate flasher.exe file on the CD-ROM and run it.
10. Answer Yes to the first warning dialog box.
11. Look at the “Intended” column of data. Ensure that these options are appropriate for your monitor.
NOTE: All of the options except Fetal Movement and Spectra Alerts can be modified. Fetal Movement and
Spectra Alerts are separate, purchased features and cannot be modified by the user.
12. When the Upgrade button becomes available, press Upgrade to start the upgrade (as per the “Intended”
column). The monitor will reboot during the upgrade.
CAUTION:
Upon pressing the Upgrade button, DO NOT interrupt the upgrade by unplugging the flasher cable
or disconnecting the external power source or terminating the flasher application until the Exit
button becomes available.
NOTE: If the upgrade is interrupted for any reasons, the monitor cannot be upgraded anymore and the main
board has to be replaced.
NOTE: After the upgrade is complete, the Exit button becomes available. The settings from the monitor will be
refreshed in the “Current Monitor” column.
13. Close the flasher program and unplug the flasher cable.
14. Perform a functional checkout procedure on the monitor as instructed in the product service manual. If the
functional checkout fails, repeat steps 1 to 12 to perform the upgrade procedure again. Call service if the
functional checkout procedure continues to fail.
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© 2013 by General Electric Company. All rights reserved.
Appendix G: CorometricsTM 325 Simulator Setup and
Use
GE Healthcare has discontinued the sales of The CorometricsTM 325 fetal simulator and recommends an
alternate fetal simulator, i.e. PS320 simulator manufactured by Fluke® Biomedical, as a substitute for
CorometricsTM 325 fetal simulator to perform the tests and troubleshooting on the CorometricsTM 250cx Series
monitors.
For the customers who still use the CorometricsTM 325 fetal simulator, this Appendix covers the simulator setup
information and provides the relevant functional checks instructions based on the use of CorometricsTM 325
fetal simulator.
NOTE: CorometricsTM 305 simulators do not work with the CorometricsTM 250cx Series monitors. Use a
CorometricsTM 325 simulator and a Y adapter cable (Part number: 1442AAO) for the functional checks.
G.1 Simulator Setup
Make sure both the CorometricsTM 250cx Series monitor and the CorometricsTM 325 fetal simulator are turned
off. Confirm the Power Switches are in the off position.
1. Connect the simulator power cord to the power connector on the rear panel of the simulator and then plug
the power cord into a properly-grounded power outlet.
2. Connect the simulator interconnect cable’s 50-pin end to the simulator’s Fetal Monitor connector.
3. Insert the green plug of the FECG/MECG adapter cable (Part number: 1442AAO) into the FECG/MECG
connector of the monitor.
4. Connect the sub-cables of the other end of the simulator interconnect cable into the color-coded
connectors on the monitor/adapter: ECG, US, and UA.
5. Turn on the fetal simulator. Verify that the green Power Indicator illuminates.
6. Turn on the CorometricsTM 250cx Series monitor
G.2 Alarms Check
1. Connect the FECG/MECG adapter cable to the FECG/MECG input connector on the monitor unit.
© 2013 by General Electric Company. All rights reserved.
2036947-001171
Appendix G: CorometricsTM 325 Simulator Setup and Use
2. Connect the 325 simulator’s ECG cable to the MECG input of the adapter.
3. Use the Trim Knob Control to access the MHR/P Setup screen.
4. Set the MHR/P source to MECG.
5. Set the MHR/P high alarm limit value to 120 bpm.
6. Set the MHR/P low alarm limit value to 60 bpm.
7. Set the alarm volume to a level you can easily hear.
8. Exit the MHR/P Setup screen.
9. Access the Master Alarm Setup screen.
10. Access Install Options Screen 2.
11. Select Store Current to Hospital. Exit the service mode by selecting Restart at the bottom of the screen.
12. Set the switches on the 325 simulator according to Table G-1.
Table G-1: 325 Simulator Settings for Alarms Check
Section
FECG/MECG
GENERAL
Switch Name
Main
Rate
Mode
QRS Amplitude
QRS Polarity
Pattern Memory
Setting
Rate
Manual
MECG
500 µV
+
Off
13. Using the simulator’s Manual Adjustment knob, input an MECG signal of 119 bpm as indicated on the
monitor. Verify that there is no alarm tone sounding from the rear panel speaker.
14. Using the simulator’s Manual Adjustment knob, increase the MECG rate to 120 bpm. Again, verify that there
is no alarm tone sounding from the rear panel speaker.
15. Using the simulator’s Manual Adjustment knob, increase the MECG rate to 121 bpm. Verify the following on
the monitor:
• The following alarm tone is emitted from the rear panel speaker: alternating high/low tones until the
alarm condition is removed (following steps.)
• The MECG value flashes.
16. Depress the front panel Alarm Silence button and verify the following:
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Appendix G: CorometricsTM 325 Simulator Setup and Use
• The alarm tone is silenced.
• The ALARM SILENCE X:XX message box appears on the screen and a countdown is started.
17. Wait the user-specified re-alarm time and verify that the alarm tone is once again emitted from the rear
panel speaker.
18. Use the simulator’s Manual Adjustment knob to decrease the MECG rate to 120 bpm. Verify the following
on the monitor:
• The alarm tone is silenced.
• The MECG value no longer flashes.
• After 10 seconds, the two above conditions are still true.
19. Using the simulator’s Manual Adjustment knob, input an MECG signal of 61 bpm. Verify that there is no
alarm tone sounding from the rear panel speaker.
20. Using the simulator’s Manual Adjustment knob, decrease the MECG rate to 60 bpm. Again, verify that there
is no alarm tone sounding from the rear panel speaker.
21. Using the simulator’s Manual Adjustment knob, decrease the MECG rate to 59 bpm. Verify the following on
the monitor:
• The alarm tone is emitted from the rear panel speaker.
• The MECG value flashes.
22. Depress the front panel Alarm Silence button and verify the following:
• The alarm tone is silenced.
• The MECG value continues flashing.
• The message ALARM SILENCE X:XX appears on the screen and a countdown is started.
23. Wait the user-specified re-alarm time and verify that the alarm tone is once again emitted from the rear
panel speaker.
24. Use the simulator’s Manual Adjustment knob to decrease the MECG signal to 60 bpm. Verify the following
on the monitor:
• The alarm tone is silenced.
• The MECG value no longer flashes.
• After 10 seconds, the two above conditions are still true.
© 2013 by General Electric Company. All rights reserved.
2036947-001173
Appendix G: CorometricsTM 325 Simulator Setup and Use
G.3 MECG Input Check
1. Connect the simulator’s ECG cable to the MECG connector on the monitor adapter cable (Part number:
1442AAO).
2. Connect the simulator’s UA cable to the UA connector on the monitor.
3. Set the switches on the 325 simulator according to Table G-2.
Table G-2: 325 Simulator Settings for MECG Input Check
Section
Switch Name
Rate/CMR
Rate
Mode
QRS Amplitude
QRS Polarity
Pattern Memory
Main
Mode
FECG/MECG
GENERAL
UA
Setting
Rate
Manual
MECG
15 µV
+
Off
CMR
TOCO
4. If not already on, depress the Record button.
5. Turn the simulator’s Manual Adjustment knob counterclockwise and verify the following on the monitor
display until the monitor reads a value of 30 bpm:
• The MHR/P mode is MECG.
• The MHR heartbeat indicator ( ♥ ) flashes at a rate of 30 times per minute.
• The UA mode is TOCO.
6. Access the Install Options Screen 2 and note the Default TOCO Reference value. Exit the service mode by
selecting Restart at the bottom of the screen.
7. After the monitor restarts, press the front panel UA Reference button.
8. Verify the following on the monitor:
• The UA value is referenced to the default value.
• The recorder prints a continuous line at the default value on the bottom grid of the strip chart paper.
• The recorder prints the message UA REF on the strip chart paper.
9. Turn the simulator’s Manual Adjustment knob until the monitor displays an MECG signal of approximately
60 bpm. Verify the following on the monitor:
• The MHR value is 60 bpm.
• The MHR heartbeat indicator ( ♥ ) flashes at a rate of 60 times per minute (1 per second).
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© 2013 by General Electric Company. All rights reserved.
Appendix G: CorometricsTM 325 Simulator Setup and Use
• The ECG “beep” volume is generated from the rear panel speaker. The volume can be adjusted on the
MHR/P Setup screen.
• Set HR/PR Trace to On in the MHR/P Setup screen The recorder should print a continuous line at 60 bpm
on the top grid of the strip chart paper.
G.4 FECG Input Check
1. Connect the simulator’s ECG cable to the FECG connector on the Y adapter cable.
2. Connect the simulator’s UA cable to the UA connector on the monitor.
3. Set the switches on the 325 simulator according to Table G-3.
Table G-3: 325 Simulator Settings for FECG Input Check
Section
FECG/MECG
GENERAL
UA
Switch Name
Rate/CMR
Rate
Mode
QRS Amplitude
QRS Polarity
Pattern Memory
Main
Mode
Setting
Rate
Manual
MECG
15 µV
+
Off
CMR
TOCO
4. If not already on, depress the Record button.
5. Turn the simulator’s Manual Adjustment knob counterclockwise and verify the following on the monitor
display:
•
•
•
•
The FECG value is 30 bpm.
The FECG mode is FECG.
The FECG heartbeat indicator ( ♥ ) flashes at a rate of 30 times per minute.
The UA mode is TOCO.
6. Depress and hold the UA Reference button and release when the UA value shows 10 relative units in mmHg
mode or 1.3 kPa in kPa mode. Verify the following on the monitor:
• The UA value is referenced to 10 mmHg (1.3 kPa) on the display.
• The recorder prints a continuous line at 10 mmHg (1.3 kPa) on the bottom grid of the strip chart paper.
• The recorder prints the messages UA REF on the strip chart paper.
7. Turn the simulator’s Manual Adjustment knob to input an FECG signal of approximately 120 bpm. Verify the
following on the monitor:
• The FECG value is 120 bpm.
• FECG heartbeat indicator ( ♥ ) flashes at a rate of 120 times per minute.
© 2013 by General Electric Company. All rights reserved.
2036947-001175
Appendix G: CorometricsTM 325 Simulator Setup and Use
• The ECG “beep” volume of the rear panel speaker can be increased or decreased using the left pair of
Volume buttons (Set the volume to the desired level).
• The recorder prints a continuous line at 120 bpm on the HR grid of the strip chart paper.
8. Repeat Step 7 for each of the following rates: 30, 60, 210, and 240 bpm.
9. Change the simulator’s QRS Polarity switch from + to –. Verify that the monitor does not skip any beats.
10. Set the simulator’s ECG Rate switch to the RAMP setting. Verify that the FECG value counts between
approximately 30 and 240 bpm and that the recorder prints a ramp between the same values.
11. Access Install Options Screen 2 and set ECG Artifact Elimination to Off. Then exit the service mode by
selecting Restart at the bottom of the screen.
12. Set the simulator’s ECG Rate switch to the Δ15 position. Verify the following on the monitor:
•
•
•
•
The FECG value alternates by 15 bpm.
The FHR1 heartbeat indicator ( ♥ ) flashes for each input signal.
The ECG “beep” is generated from the rear panel speaker.
The recorder prints an oscillation of 15 bpm between 110 and 125 bpm on the top grid of the strip chart
paper.
13. Repeat Step 12 for rates values of Δ22 and Δ27. The results should be the same except that the FHR1 value
alternates by either 22 or 27 bpm and the recorder prints an oscillation of 22 or 27 bpm. The top value is
always at approximately 125 bpm.
14. Access Install Options Screen 2 and set the FECG Artifact Elimination to On.
15. Set the simulator’s ECG Rate switch to the Δ15 position. Verify the following on the monitor:
•
•
•
•
The FHR1 value alternates by 15 bpm.
The FHR1 heartbeat indicator ( ♥ ) flashes for each input signal.
The ECG “beep” is generated from the rear panel speaker.
The recorder prints an oscillation of 15 bpm between 110 and 125 bpm on the top grid of the strip chart
paper.
16. Repeat Step 15 for the rate value of Δ22. The result should be the same as Step 15 except that the FHR1
value alternates between 22 bpm and the recorder prints an oscillation of 22 bpm between the 103 and
125 bpm on the strip chart recorder paper.
17. Set the simulator’s ECG Rate switch to the Δ27 position. Verify the following on the monitor:
•
•
•
•
The FHR1 value oscillates by 27 bpm.
The FHR1 heartbeat indicator ( ♥ ) flashes for each input signal.
The ECG “beep” is generated from the rear panel speaker.
The recorder does not print any oscillation.
18. Access Install Options Screen 2 and set the FECG Artifact Elimination back to Off.
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© 2013 by General Electric Company. All rights reserved.
Appendix G: CorometricsTM 325 Simulator Setup and Use
19. Set the simulator’s ECG Rate switch to the MANUAL position and the Manual Adjustment knob to the
counterclockwise position. Disconnect the ECG simulator cable from the Y adapter cable. Verify the
following on the monitor:
• The FHR1 value and mode are both blank.
• The recorder stops printing heart rate data on the strip chart paper.
• The recorder prints the message CARDIO INOP on the center margin of the strip chart paper after
approximately 30 seconds.
• Set the simulator’s ECG Mode switch to the Off position.
G.5 Ultrasound Input Check
1. Connect the simulator’s US cable to the US connector on the monitor.
2. Set the switches on the Model 325 Input Simulator according to Table G-4.
Table G-4: 325 Simulator Settings for Ultrasound Input Check
Section
US/FMD
GENERAL
UA
Switch Name
Mode
Signal Level
Rate
Pattern Memory
Main
Mode
Setting
US
MED
Manual
Off
CMR
TOCO
3. If not already on, depress the Record button.
4. Turn the simulator’s Manual Adjustment knob to input an ultrasound signal of approximately 120 bpm.
Verify the following on the monitor:
•
•
•
•
The FHR1 value is 120 bpm.
The FHR1 mode is US.
The FHR1 heartbeat indicator ( ♥ ) flashes at a rate of 120 times per minute.
Ultrasound audio volume from the rear panel speaker can be increased or decreased using the upperleft pair of Volume buttons (Set the volume to the desired level).
• The recorder prints a continuous line at 120 bpm on the top grid of the strip chart paper.
• The recorder prints the message US on the center margin of the strip chart paper after approximately
20 seconds.
5. Use the simulator’s Manual Adjustment knob to increase the heart rate value by less than 13 bpm from the
120 bpm baseline. Verify the following on the monitor:
• The FHR1 value immediately reflects this new input rate.
• The strip chart recorder immediately reflects this new input rate.
6. Use the simulator’s Manual Adjustment knob to decrease the heart rate value by more than 13 bpm from
the 120 bpm baseline. Verify the following on the monitor:
© 2013 by General Electric Company. All rights reserved.
2036947-001177
Appendix G: CorometricsTM 325 Simulator Setup and Use
• The FHR1 value immediately reflects this new input rate.
• The strip chart recorder prints at the last input rate for an additional 3 seconds before blanking the
heart rate data and printing a continuous line at the new input rate.
7. Set the simulator’s US Rate switch to the RAMP position. Verify that the FHR1 value counts between
approximately 50 and 210 bpm and that the recorder prints a ramp between the same values.
8. Place the simulator’s US Rate switch in each of the individual rate settings (50, 60, 120, and 210 bpm). Verify
the following on the monitor:
•
•
•
•
The FHR1 value reflects the simulator setting ± 1 bpm.
The FHR1 heartbeat indicator ( ♥ ) flashes at the simulator setting.
Ultrasound audio is generated from the rear panel speaker.
The recorder prints a continuous line at the respective value ± 3 bpm on the top grid of the strip chart
paper.
9. Repeat Step 4 through Step 8 using the second ultrasound channel. (The mode will show US2.)
10. Place the simulator’s US Mode switch in the Off position. Verify the following on the monitor:
• The FHR1 value and mode are both blank.
• The recorder stops printing the fetal heart rate trace.
• The recorder prints the message CARDIO INOP on the center margin of the strip chart paper after
approximately 20 seconds.
G.6 Uterine Activity Check
1. Set the switches on the 325 simulator according to Table G-5,
Table G-5: 325 Simulator Settings for Uterine Activity Check
Section
US/FMD
Switch Name
Mode
Level
Main
Pattern Memory
Setting
TOCO
0 mmHg
Level
Off
2. Connect the simulator’s UA cable to the UA connector on the monitor.
3. Access the Install Options Screen 2 and select Pressure units: mmHg mode.
4. Access the Install Options Screen 2 and note the Default TOCO Reference value. (The monitor is shipped
from the factory with this value set at 10 mmHg (1.3 kPa). However, your unit may have been custom
configured.) Exit the service mode by selecting Restart at the bottom of the screen.
5. If not already on, depress the Record button.
6. Briefly press the UA Reference button. Verify the following on the monitor:
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© 2013 by General Electric Company. All rights reserved.
Appendix G: CorometricsTM 325 Simulator Setup and Use
• The UA value is the default setting.
• The UA mode is TOCO.
• The recorder prints a continuous line at the default value on the uterine activity channel of the strip
chart paper.
• The recorder prints the messages UA REF on the strip chart paper.
7. Press and hold the UA Reference button on the monitor to cycle through the available selections for UA
reference: 5, 10, 15, 20, or 25 relative units in mmHg mode. Test each of these reference settings. Verify that
the UA value is displayed accordingly and that the recorder prints a continuous line at the corresponding
value on the uterine activity channel of the strip chart paper.
8. Place the simulator’s UA Level switch at each of the level settings: 0, 10, 50, and 100 relative units.
Verify that the UA value is displayed accordingly and that the recorder prints a continuous line at the
corresponding value on the heart rate channel of the strip chart paper.
9. Place the simulator’s UA Mode switch in the IUP position and the UA Level switch to 0 mmHg/kPa. Depress
the UA Reference button and verify that the monitor and recorder reference to 0 mmHg/kPa. Verify the
following on the monitor:
•
•
•
•
The UA value is 0 mmHg.
The UA mode is IUP.
The recorder prints a continuous line at 0 mmHg on the uterine activity channel of the strip chart paper.
The recorder prints the messages UA REF on the strip chart paper.
10. Place the simulator’s UA Level switch at each of the level settings: 0, 10, 50, and 100 mmHg. Verify that the
UA value is displayed accordingly and that the recorder prints a continuous line at the corresponding value
on the uterine activity channel of the strip chart paper.
11. Place the simulator’s UA Level switch to the RAMP position. Verify that the UA value measures between
approximately 0 and 100 mmHg and that the recorder prints a ramp between the same values.
12. Disconnect the 325 simulator’s UA cable from the UA input connector the front panel of the monitor. Verify
the following on the monitor:
• The UA value and IUP are both blank.
• The recorder stops printing the uterine activity trace.
• The recorder prints the message UA INOP on the center margin of the strip chart paper after
approximately 20 seconds.
G.7 Pattern Memory Check
The pattern memory of the simulator can be used to test any of the following mode combinations of the
monitor: FECG/TOCO, FECG/IUP, MECG/TOCO, MECG/IUP, US/TOCO, US/IUP, US/FMD/TOCO, US/FMD/IUP, US2/
TOCO, US2/IUP, FECG/US/TOCO, FECG/US/IUP, FECG/US2/TOCO, FECG/US2/IUP, US/TOCO/MECG, US/IUP/MECG,
US2/TOCO/MECG, US2/IUP/MECG.
© 2013 by General Electric Company. All rights reserved.
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Appendix G: CorometricsTM 325 Simulator Setup and Use
NOTE: US/US2 cannot be tested simultaneously unless two 325 simulators or two ultrasound transducers are
used. Do not perform the dual ultrasound test using one 325 simulator and one ultrasound transducer
or a conflict between enable lines will occur.
NOTE: FECG/MECG cannot be tested simultaneously unless two 325 simulators are used.
NOTE: Dual heart rate check can be done using the pattern memory check.
To check any of the mode combinations listed above:
1. Connect the appropriate simulator sub-cables to the corresponding connectors on the monitor.
2. Enable the modes on the simulator.
3. Set the simulator’s Pattern Memory switch to the ON position.
4. If not already on, depress the Record button.
5. Verify the following on the monitor:
• Each heart rate area (FHR1, FHR2, and/or MECG) responds accordingly for value, mode, and heartbeat
indicator.
• The UA area responds accordingly for value and mode.
• The recorder responds appropriately in both trending and message information.
G.8 Dual Heart Rate Check (Non-Pattern, FECG/US Modes)
1. Connect the FECG/MECG adapter cable to the FECG/MECG connector on the monitor unit.
2. Connect the 325 simulator’s ECG cable to the FECG input on the Y adapter cable.
3. Connect the simulator’s US cable to the US input connector.
4. Set the switches on the 325 simulator according to Table G-6.
Table G-6: 325 Simulator Settings for Dual Heart Rate (Non-Pattern) Check
Section
Switch Name
Rate/CMR
Rate
Mode
QRS Amplitude
QRS Polarity
FECG/MECG
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Setting
Rate
120 bpm
FECG
50 µV
+
© 2013 by General Electric Company. All rights reserved.
Appendix G: CorometricsTM 325 Simulator Setup and Use
Section
Ultrasound/FMD
GENERAL
Switch Name
Mode
Level
Rate
Pattern Memory
Setting
US
MED
RAMP
Off
5. If not already on, depress the Record button.
6. Verify the following on the monitor:
•
•
•
•
•
•
•
•
The FHR1 value reads 120 bpm ± 1 bpm.
The FHR1 mode reads FECG.
The FHR1 heartbeat indicator ( ♥ ) flashes at a rate of 120 times per minute.
The FHR2 value varies between approximately 50 and 210 bpm.
The FHR2 mode reads US.
The FHR2 heartbeat indicator ( ♥ ) flashes at a rate consistent with the value.
The recorder prints the messages FECG and US on the center margin of the strip chart paper.
The recorder prints a continuous plain black line (
) on the 120 bpm mark on the heart rate
channel of the strip chart paper.
• The recorder prints a bold black ramp trace (
) between 50 and 210 bpm on the heart rate
channel of the strip chart paper.
G.9 Dual Heart Rate Check (Non-Pattern, Dual US Modes)
NOTE: This check cannot be done unless two 325 simulators or two ultrasound transducers are used. Do not
perform this check using one 325 simulator and one ultrasound transducer. The following instructions
detail the procedure of using two ultrasound transducers.
1. If not already on, depress the Record button.
2. Plug one ultrasound transducer into the US input connector and the other into the US2 connector. Verify
the following on the monitor:
•
•
•
•
•
The FHR1 mode shows US.
The FHR2 mode shows US2.
The FHR1 value shows three steady dashes “– – –.”
The FHR2 value shows three steady dashes “– – –.”
The recorder prints the messages US and US2 on the center margin of the strip chart paper.
3. Use your finger to rub the face of the ultrasound transducer connected to the US input connector and
maintain a steady rate and verify the following on the monitor:
• The FHR1 value responds to the rubbing.
• The FHR1 heartbeat indicator ( ♥ ) responds to the input.
• The recorder prints the heart rate tracing corresponding to the rate and the trace is plain black (
© 2013 by General Electric Company. All rights reserved.
).
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Appendix G: CorometricsTM 325 Simulator Setup and Use
4. Use your finger to rub the face of the ultrasound transducer connected to the US2 input connector and
maintain a steady rate and verify the following on the monitor:
• The FHR2 value responds to the rubbing.
• The FHR2 heartbeat indicator ( ♥ ) responds to the input.
• The recorder prints the heart rate tracing corresponding to the rate and the trace is bold black (
).
G.10 Fetal Movement Detection Check
This section provides instructions to check the integrity of the fetal movement detection circuitry and the heart
rate channel of the recorder.
1. Connect the simulator’s US cable to the US connector on the monitor. Select the FHR2 mode field. Make
sure FM Detect is On.
2. Set the switches on the 325 simulator according to Table G-7.
Table G-7: 325 Simulator Settings for Fetal Movement Detection Check
Section
Switch Name
Mode
Signal Level
Rate
Main
Mode
US/FMD
UA
Setting
US/FMD
MED
Manual
CMR
TOCO
3. If not already on, depress the Record button.
4. Turn the simulator’s Manual Adjustment knob to input an ultrasound signal of approximately 120 bpm.
Verify the following on the monitor:
• The FHR1 value is 120 bpm.
• The FHR1 mode is US.
• The FMD indication displays in between the FHR1 and FHR2 mode title locations if alerts are not
enabled.
• The FHR1 heartbeat indicator ( ♥ ) flashes at a rate of 120 times per minute.
• Ultrasound audio volume from the rear panel speaker can be increased or decreased using the upperleft pair of Volume buttons (Set the volume to the desired level).
• The recorder prints a continuous line at 120 bpm on the top grid of the strip chart paper.
• Fetal movement markers (
) are shown on for 1 second, then off for 8 seconds, then on for 1
second, etc.
• The recorder prints the messages US and FMD (
) on the center margin of the strip chart paper
after approximately 20 seconds.
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© 2013 by General Electric Company. All rights reserved.
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GE Medical Systems
Bangalore. 560 067
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