HP 4262A User's manual

HP 4262A User's manual
 Гл HEWLETT
PACKARD
OPERATING AND SERVICE MANUAL
MODEL 4262A
LCR METER
(including
SERIAL NUMBERS
This manual appiies directly to instruments with
serial numbers prefixed 25144
With changes described in Section VI, this
manual also applies to instruments with seriai
numbers prefixed 1710J, 1739J, and 2022.
For additional important information about serial
numbers, see INSTRUMENTS COVERED BY MAN-
UAL in Section L |
O COPYRIGHT: YOKOGAWA-HEWLETT-PACKARD, LTD., 1877
9-1, TAKAKURA-CHO, HACHIOJI-SHI, TOKYO, JAPAN
Manual Part No. 04262-90007 |
Microfiche Part No. 04262-90057
Printed JUN. “1987
+1
A
à]
Me ВН Ут» - a
A E
SAFETY SUMMARY
The following general safety precautions must be observed during all phases of op-
eration, service, and repair of this instrument. Failure to comply with these pre-
cautions or with specific warnings given elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Hewlett-
Packard Company assumes no liability for the customer's failure to comply with
these requirements.
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cabinet must be connected to
an electrical ground. The instrument is equipped with a three-conductor ac power
cable. The power cable must either be plugged into an approved three-contact
electrical outlet or used with a three-contact to two-contact adapter with the
grounding wire (green) firmiy connected to an electrical ground (safety ground) at
the power outlet. The power jack and the mating plug of the power cable meet
international Electrotechnical Commission (IEC) safety standards.
Do not operate the instrument in the presence of flammable gases or fumes. Op-
eration of any electrical instrument in such an environment constitutes a definite
safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers. Component replacement
and internal adjustments must be made by qualified maintenance personnel. Do not
replace components with power cable connected. Under certain conditions, dan-
gerous voitages may exist even with the power cable removed. To avoid injuries,
always disconnect power and discharge circuits before touching them.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person, capable of
rendering first aid and resuscitation, is present.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
— Because of the danger of introducing additional hazards, do not install substitute
parts or perform any unauthorized modification to the instrument. Return the in-
strument to a Hewlett-Packard Sales and Service Office for service and repair to
ensure that safety features are maintained.
DANGERCUS PROCEDURE WARNINCS
Warnings, such as the example below, precede potentially dangerous procedures
throughout this manual. Instructions contained in the warnings must be followed.
WARNING
Dangerous voltages, capable of causing death, are present in this instru-
ment. Use extreme caution when handling, testing, and adjusting.
Herstellerbescheinigung
Hiermit wird bescheinigt, daß das Gerät HP 4262A digital LCR meter in Übereinstimmung
mit den Bestimmungen von Postverfügung 1046/84 funkentstôrt ist.
Der Deutschen Bundespost wurde das Inverkehrbringen dieses Gerátes angezeigt und die
Berechtigung zur Überprüfung der Serie auf Einhaltung der Bestimmungen eingeräumt.
Anm: Werden Meß- und Testgeräte mit ungeschirmten Kabeln und |/oder In offenen
Entstörbestimmungen unter Betriebsbedingungen an seiner - Grundstilcksgrenze eingehalten
werden.
GERA USCHEMISSION
Lpa < 70 dB
am Arbeitsplatz
normaler Betrieb
nach DIN 45035 T. 19
Manufacturers Declaration
This is to certify that this product, the HP 4262A digital LCR meter, meets the radio
frequency interference requirements of directive 1046/84. The German Bundespost has been“
notified that this equipment was put into circulation and was granted the right to check they:
product type for compliance with these requirements. in
Note: If test and measurement equipment is operated with unshielded cables and/or used, for” “
measurements on open set-ups, the user must insure that under these operating conditions,
the radio frequency interference limits are met at the border of his premises. AA
ACOUSTIC NOISE EMISSION
Lpa < 70 dB
operator position ;
normal operation on
per ISO 7779 Ш
ЗА
Ks HEWLETT
PACKARD
OPERATING AND SERVICE MANUAL
MODEL 4262A
LCR METER
SERIAL NUMBERS
This manual applies directly to instruments with
serial numbers prefixed 2514J
With changes described in Section Vi, this
manual also applies to instruments with serial
numbers prefixed 1710J, 1739J, and 2022J
For additional important information about serial
numbers, see INSTRUMENTS COVERED BY MAN-
UAL in Section |.
O COPYRIGHT: YOKOGAWA-HEWLETT-PACKARD, LTD., 1977
9-1, TAKAKURA-CHO, HACHIOJ-SHI, TOKYO, JAPAN
~ Manual Part No. 04262-90007 | о
Microfiche Part No. 04262-90057 Printed + JUN. 1987
Table of Contents Model 4262A
TABLE OF CONTENTS
Section Title Page Section Title Page
I GENERAL INFORMATION. ...... es 080000 1-1 3-30. Terminal Configuration ........... 3-10
1-1. Infroduction.............. ee 44... 1-1 3-32. Offset Adjustment ................ 3-10
1-4, Description ..... e eorrecionerare. 1-1 3-40. Option Operation ................. 3-27
1-8, Specifications .......rercooraneroo. 1.7 3-42. Option 001: BCD Parallel Data
1-10, Safety Considerations ......... 1-7 Output ......e.oarareoscoas cross 3-27
1-13, Instruments Covered by Manual 1-7 3-44, Output Data and Pin
1-18. Options... .. 1-8 Assignment......e ecc cono. 3-27
1-20, Option 001 ..... bese nana 1-8 3-46, Alternate Output of LCR and |
1-22. Option 004 .............. 1-8 D/Q Data. .......... seroreos 3-27
1-24, Option 101 ,,......... ,…. 1-8 3-47. Output Timing .......eeoeeanoo 3-27
1-26, Option 010......... ee... 1-8 3-48, Option 004-COMPARATOR ....... 3-30
1-28, Other Options........... 1-8 ~~ 3-81. Front Panel Features ~~
1-31, Accessories Supplied ...... asorric. 1-8 (Figure 3-42) .......... e... 3-30
1-33, Equipment Available ........e—_.e.e.eo. 1-8 3-52. LIMIT Setting Warning ....,., 331
«53 is]
D INSTALLATION............eerecevoeoeo. ‚ 2-1 3 Output Connector Decision 2-31
273 Introduction cersececenec eee eee Ч 3-60. Option 101: HP-IB ...... eens 3-32
© mas NSPEction. . «vl. fat TT" 3-62, Connection to HP-IB Controiler 3-32
2-5 Preparation for Use ........000... 2-1 3-63 HP-IB Status Indicator 3.39
2-6 Power Requirements .......... 2-1 3-64. LOCAL Switch 3.39
2-8 Line Voltage and Fuse Selection 4-1 3-65. HP-IB Interface Capabilities.. 3-32
2-10 Power Cable ................. 2-1 3-66. Source and Acceptor
2-14, ImnterconnectionS.....—.e_erovee. 2-3 | Handshake: SHI. AHL.. 3-32
2-16. Operating Environment........ 4-3 3-87 Talker Capability: T5, 3.39
2-19 Installation Instructions ....... 2-3 3-68. Functions Related to
2-21 Installation of Options ° Talker Capability 3.33
907, 908 and 909 ...... 2-3 3-69, Listener Capability: 14 . 3-33
2-23. Storage and Shipment ............. 2=3 3-70 Service Request
2-24, Environment ..... res. esoareo ZÉ ° Capability: SRI 3.33
2-26, Packaging ....orcosorrcorerroo 2-3 3-71. Remote/Local
2-29, Option Installation .....ooe._erecasos 2-6 Capabilitv: RLI 3-36
2-31. Option 001 BCD Data Output 3-79 Device Clear 07 ve
installation .....oresacceccóro 2-6 ° 113
2-32, Option 004 Comparator 373 Device Trio DCL evens 4-36
Installation о... ' 2-6 Capability: DT1....... 3-36
2-33. Coupling Option 004 Comparator 3-14 ADDRESS Switch 3-36
with Option 001 BCD Data Jy errr 3”
Output Installation ........... 2-6 3-70, Remote Message Coding .,..... 3-36
2-34, Option 101 HP-IB Remote Control +
and Data Output Installation... 2-6 | "7 (ERFORMANCE TEST eeserereceereo: dr
4-3, Equipment Required .....…….…........ 4
4-5. Test Record .,..eoadoresecaranrace Tel
II OPERATION,......ecomenene. ... 3-1 4-7. Calibration Cycle. ........e.e..... 4-1
3-1. Introduction . .. LE a 3.1 ia Preliminary Operations ........ ... 4-2
3-3, Panel Features................... 3-1 —— Calibration of DUT'S.....ce.conoo. 4-4
3- 5: Self Test (Basic Operating Check) . 3 PI. Capacitanco Accurdoy Test. ..... da
Signals ........ ............. Oo. ot J AER sn nenn E.
3-9. Measurement Ránge ....' Зе 4-11, Resistance/ESR Accuracy Test.... 4-12
3-11. Initial Display Test . TT 3.7 4-12. Dissipation Factor Confirmation Check . 4-14
3-13. Initial Control Settings , TT 3-7 4-13, Inductance Accuracy Test ,...eo... 4-17
3-15. D/Q Measurement ............... 3.7 4-14, Internal DC Bias Source Test ..... 4-19
q. 17, LCR Measurement ....... ...... 3.7 4-15. Offset Adjustment Test.,......... 4-20
3-19, D/Q Blanking Function (Switch 4-16, Comparator Test {Option 004 Only) 4.22
4-17. HP-IB Interface Test
selectable function inside cabinet), (Option 101 Only) 4-25
3-9
General Component Measurement .. 3-9
3~23. Semiconductor Device Measurement 3-9
3-9
3.9
A
С
во
ft
E
ns
}
о
сл
*
External DC Bias......... Been os en
3-28. External Triggering ...... 0.0007
ii
List of Tables | Model 4262A
List of Diustrations
LIST OF TABLES
Number Title Page Number Title Page
1-1 Specifications ......... 40244000008 1-2 5-1. Adjustable Components............ энд
1.2, General Mmíformation, ....eso.oe.ceoo 1-6 5-2. Factory Selected Components ,..... 5-3
1-3, Equipment Available ......e sec... 1.9 5-3, DUT's Recommended for
1.4 Recommended Test Equipment ..,, 1-10 Making Adjustments .,........ 5-4
5-4, Adjustment Requirements.......... 5=5
2-1, Option Components 4144000000 2-8
6-1, List of Reference Designators
and Abbreviations.,...... ... 6-1
3-1. Test Signal Level................. 3-6 623 Manufacturers Code List... ea
3-2 Measurement Ranges..... escoreno 3-6 64. ot 10 Me dification . RA
3-3. Annunciation Display Meanings.... 3-12 7.1 Manu | Ch No sb в ri. 1 Numb Tr 7-1
3-4... Unusual Operating Indications..... 3-21... o: о gs ua of Cha y b A embiy” Ei o
3-60. Remote Program Codes ..... s.... 3-32 6 ummary anges Dy Assembly. . fr
3-61, 11312 aa. 0 0 EEE +
Remote Message Coding 3-33 8-1. Currently Available Options ...... 8-14
8-2. Symptoms Likely to Mislead ...... 8-18
4-1, Recommended Components for
Accuracy Checks ..... te soseas 4-6 8-3 Front Panel Symptoms of internal
Control Misadiustment ....... 8-19
8-4. Front Panel Isolation Procedure .. 8-20
LIST OF ILLUSTRATIONS
Number Titie Page Number Title Page
1-1. Model 4262A and Accessories...... 1-1 4-4, Dissipation Factor Confirmation Cheek
1-2. Serial Number Plate ........ 0... 1-7 Setups ...…..…...….…... Coser eas +. , 4-14
4-5, Inductance Accuracy Test Setup ... 4-17
2-1 Voltage and Fuse Selection..... crea B+ 4-6. Internal DC Bias Source
2-2 Power Cable ..,., 000001... # 07 4... 24 Test Setup... 40.4.0700 4-19
2-3 Rack Mount Kit.............. .. 2-5 4-7 Offset Adjustment Test Setup...... 4-20
2~4 Option Installation llustrations..... 2-7 4-8. Comparator Test Setups.......... 422
4-9, Comparator Output (J6) data format 4-24
3-1 Front Panel Features ........ cease Om 4-10, HP-IB Interface Test Setup ....... 4-25
3-2, Rear Panel Features. ....o...-.onm... 3-4 4-11. SRQ Service Roufing ......o.s00o.. 4-29
3-3, Test Fixture and Leads.....eoso... 3-8
3-4 Measurement Error due to 9-1, Power Supply Voltage Adjustment... 5-6
Misadjusted ZERO ADJ controls .. 3-10 5-2. Nanoprocessor Operating Power
3-5, Conversion between Parallel and Voltage Adjustment Location ..... 5-7
Series Equivalente .......eacoos ‚9-12 3-3. Al2 Board Offset Adjustment ,..... 5-8
3-6. Relationship of Dissipation to 5-4. Waveform at A12Q11 Source ....... 5-9
Series and Parallel Resistance... , 3-13 5-5. Al3 Board Offset Adjustment....... 5-9
3-7 General Component Measurements, , 3-13 9-6, Waveform at A13TP1 ............ 5-10
3-8. Semiconductor Device Measurement 3-18 5-7 Waveform at AI137TP2 ......... ... 9=11
3-9, External DC Bias Circuits.........3-20 9-8. Waveform at A13TP3 ........0.., D-12
3-40, Pin Assignments of Output 9-9. Al4 Phase Detector € Integrator
0 | Connector and Output Format.....3-28 Adjustment ......e._ecsnecscosoeeo D13
3-41, Timing Chart of BCD Data Output... 3-29 5~10, А2251 Switch Setting ............. 5-14
. 3-42, Front Panel Features .....e..e.... 3-30 5-11, Zero Detector € APAO Adjustments 5-15
3-43, Option 004: COMPARATOR ........3-30 6-12, 10kHz Measurement Accuracy
3-44. Pin Location of Comparator Adjustment .......e.wcm.ccoscoreo 9-17
Data Qutput.....o. 2500000008 „00.931 5-13. Offset Adjustment Setup ..... ‚0.0.0. 5-22
4-1, Measurement Frequency Test Setup, 4-17 6-1. Major Mechanical Parts
4-2. Capacitance Accuracy Test Setup... 4-8 - Exploded View ...000000000000 6-23
4-3 Resistance Accuracy Test Setup... .4-12 6-2. Mechanical Parts
« Exploded View ,....... sacado 6-25
iv
Model 4262A
Section I
Paragraphs 1-1 to 1-6
SECTION I
GENERAL INFORMATION
1-1, INTRODUCTION,
1-2. This operating and service manual contains
the information required to install, operate, test,
adjust and service the Hewlett-Packard Model
4262A Digital LCR Meter. Figure 1-1 shows the in-
strument and supplied accessories. This section
covers specifications, Instrument identification,
description, options, accessories, and other basic
information.
1-3. Listed on the title page of this manual is a
“microfiche part number. This number can be used
to order 4 x 6 inch microfilm transparencies of the
manual. Each microfiche contains up to 60 photo-
duplicates of the manual pages, The microfiche
package also includes the latest manual changes
suppiement as well as all pertinent service notes.
To order an additional manual, use the part num-
ber listed on the title page of this manual.
1-4. DESCRIPTION.
1-5. The HP Model 4262A LCR Meter is a general
purpose, fully automatic test instrument designed
to measure the parameters of an impedance ele-
ment with high accuracy and speed. The 4262A
measures capacitance, inductance, resistance (equi-
valent series resistance) and dissipation factor or
quality factor over a wide range at test frequencies
of 120Hz, 1kHz and 10kHz employing a five-term-
inal connection configuration between the com-
ponent and the instrument. The measuring circuit
for the device to be measured is capable of both
parallel and series equivalent circuit measurements
and the measured values are displayed by the two
three-full digits LED displays on the front panel.
A convenient diagnostic function, also featured in
the 4262A, is actuated by a SELF TEST switch.
This confirms functional operation of the instrument.
1-6. The measuring range for capacitance is from
0.01pF to 19.99mF, inductance from 0.01u to
1999H, and resistance from Im® to 19.99M2,
which are measured with a basic accuracy of 0.2
to 0.3% depending on test signal level, frequency,
and measuring equivalent circuit, and at typical
measuring speeds of 220 to 260 milliseconds at
be
FEMEL „= —.
Mau >
LES
Me. в
- Ce mse
P/N 8120-1378
EE ела,
ODA atts =
Figure 1-1. Model 4262A and Accessories.
Section I
Table 1-1
Model 4262A
Table 1-1. Specifications (Sheet 1 of 4).
Parameters Measured: C - D or Q (1/D)
L - D or Q (1/D)
R (ESR) (Loss measure-
ment can be negated by
switch on internal board).
Display: 3-1/2 Digit, Maximum Display 1899
(When D value is more than 10, max-
mum display is 199).
Measurement Circuit Modes:
Auto, Parallel, and Series
Measurement Terminals: 5-terminal configura-
tion (high and low terminals for both
Range Modes: LCR - Auto and Manual
{up-down)
DQ - Auto and Manual (step)
Operating Temperature & Humidity:
0°C to 55°C at 95% RHfto 40°C)
Power Requirements: 100/120/220Y +10%,
240V +5% -10% 48 - G6Hz
potential and current leads plus guard).
Power Consumption:
COMMON SPECIFICATIONS
Deviation Measurement: When ALCR key is de-
pressed, the existing measured value
is stored as a reference value and
displayed value is offset to zero. The
range is heid and deviation is dis-
played as the difference between the
referenced value and subsequent re-
sult, {Deviation spread in counts
from -999 to 1999).
Offset Adjustment: Stray capacitance and re-
sidual inductance of test jig can be
compensated for as follows:
C: up to 10pF
cL ub te THE
Self Test: Annunciates either Pass, or Fail for
performance in each of the five basic
ranges.
DC Bias:
Measurement Frequencies: 120(100)Hz, 1kHz Internal: 1.5V, 2.2V, OV (Selectable at front
and 10kHz +3%. panel). Accuracy £5%
External: External DC bias connector on rear
panel. Maximum +40V.
Test Signal Level: Normal level: 1 Yrms,
- Low level ; 50m Vrms (parallel Trigger: Internal, External, or Manual
capacitance mode only)
Warm-up Time: 15 minutes
GENERAL
55VA with any option
Dimensions: 426(W) x 147(H) x 345(D)mm
(16-8/4” x 5-3/4” x 13-3/4”)
Weight: Approximately 8kg (Std)
Model 4262A Section !
Table 1-1
Table 1-1. Specifications (Sheet 2 of 4).
C-D, C-QMEASUREMENT
120Hz{/1000pF{10.0OnF|100.OnF|1000nF 10.00u F1100.0p F|1600uF [10.00mF
Сс 1kHz|100.0pH1000pF {10.00nF|{100.0nF 1000nF|10.00uF|100.0uF1000uF
Ranges 10kHz| 10.00pFi100.0pFI1000pF |10.00nF1100.0nF!] OO0nF {10.00uF{100.0u¥
D .001--19.9 (2 Ranges)
Q 0.051000 (4 Ranges)
+ | 1V or 50mV (LOW LEVEL) |
| Test Signal AW | 100A 100xA 1mA 10mA 40mA |
Level *2 AUTO || Sameas {dF Mode IL Same as bm Mode |
Po 0.2% + Y counts — | (Test signal level; 1V)
Th | | 0.3% + 2 counts | (Test signal level; 50mV)
C Accuracy +3 Ab (At 120Hz, 1kHz)| 0.3% + 2counts |i 75 | om |
(At 10kHz)| 0.3% + 2counts {1% + 215% + 2]
AUTO Г Same as Lut Mode | Same as rv Mode |
[0.2% + (2 + 200/Сх) counts | At 120Hz, 1kHz
| 0.5% + (2 + 200/Cx) counts] cov signa evel 1V)
La | 0.3% + (2 + 1000/Cx) counts (Test signal level: Epica
Асан В [ 1.0% + (2 + 1000/Cx) counts | At 10kHz
(At 120Hz, 1kHz) | 0.3% + (2 + Cx/500) counts |p*-¢-5
HH (At 10kHz) | 05%+(2+Cx/500)counts |||: +5 + «ар я + 66+ КС
AUTO Sameas | Mode || Same as | ЧН Моде |
*1 Calculated from D value as a reciprocal number.
*2 Typical data, varies with value of D and number of counts.
*3 #(% of reading + counts). Cx is capacitance readout in counts. This accuracy only applies for
D values to 1.999,
(For higher D values, refer to General Information).
*4 (5% + 2 counts) at 1kHz,
Accuracy applies over a temperature range of 23°C £ 5°C (At OC to 55°C, error doubles).
Note: C accuracy for higher D values are unspecified.
1-3
Section I Model 4262A
Table 1-1
Table 1-1. Specifications (Sheet 3 of 4),
L-D, L-Q MEASUREMENT
120Hz; 1000uH | 10.00mHi100.0mHi1000mH | 10.00H 100.0H 1000H
L 1kHz| 100.0uH | 1000uH 110.00mH 1100.0mH | 1000mH : 10.00H 100.0H
Ranges 16kHz | 10.005 | T00.0uH 1100088 ¡10.00mH | 100.0mHi 1000mH | 10.00H
D 001 ~18.9 (2 Ranges)
Qu 0.05~ 1000 (4 Ranges)
LE | LV |
Lest Signal «EAN | 40mA 10ma 1mA 100uA 10u A |
{At 120Hz, 1kHz) | 0.3% + 2 counts | 1% + 2 counts |
La (At 10kHz) | 0.3% + 2 counts || 1% + 2 I 5% + 2 |
L Accuracy*s | 0.2% + 2 counts |(At 120Hz, 1kHz)
“VW 110.3% + 9] 0.2% + 2 counts | (At 10kHz)
(At 120Hz, 1kHz} [0.3% + (3 + Lx/500)] 1% + (3 + Lx/500)
ma (At 10kHz) [0.5% + (3 + Lx/500)! | 14 -12- dio» ¡Pone
D | 0.2% + (3 + 200/Lx) counts | (At 120Hz, 1kHz)
У | e
| 0.5% + (3 + 200/Lx) counts (At 1kHz)
AUTO | Same as www Mode || Sameas {MY Mode |
*1 Calculated from D value as a reciprocal number.
*2 Typical data, varies with value of D and number of counts.
D values to 1.999.
R/ESR MEASUREMENT
*3 +(% of reading + counts). Lxis inductance readout in counts. This accuracy only applies for
Accuracy applies over a temperature range of 23°C £ 5°C, (At 0°C to 55°C, error doubles).
*1 Typical data, varies with number of counts.
*2 +(% of reading + counts).
*3 (0.5% + 2 counts) on 10.00MS range at 10kHz,
120Hz
Ranges RJESR DE 1000m0 :10:002 1700.00 § 10000 110.00k2100,0k©21000kK010.00MN
7
Lint | 1V |
Test Signal —
Test Si | 40mA 10mA 1mA 100uA 10uA
AUTO | Same as <ww--mwr-Mode || Sameas ut Mode |
М | 0.3% + 2 counts *3
PA
Accuracy *2 LOC 0.2% + 2 counts
AUTO ¡| Same as Ar arm Mode ][ Sameas + Mode |]
** Measurement range for ESR (equivalent series resistance) is from 1m to 19.99k2 (typical), which
varies with series capacitance and inductance value . . . . refer to “REFERENCE DATA”,
Accuracy applies over a temperature range of 23°C + 5°C. (At 0°C to 55°C, error doubles.)
1-4
Model 4262A
Section I
Table 1-1
Table 1-1. Specifications (Sheet 4 of 4).
OPTIONS
Option 001: Simultaneous BCD output of LCR
and DQ data (positive true). Max. sink
current 16mA. Mating connector (P/N
1251-0086). (Alternate BCD output
of LCR and DQ data selectable by
switch on internal board).
Option 004: Digital comparator (can not be
used with OPT 101). Compares meas-
ured value with high and low limit set-
tings for LCR or DQ and provides
HIGH, IN, LOW comparison outputs.
Limit setting range: 0000 - 1999 for each
limit switch.
“Comparison output: Visual, relay contact, 7
and TTL level.
Visual: 3 LED’s indicate HIGH(red), IN
(green), or LOW (red).
Relay contacts:
SPST contacts to circuit common
for each HIGH, IN and LOW output.
TTL level:
Open collector circuits to high level
(open) for each HIGH, IN and LOW
outputs (fanout max. 30mA).
Option 101: HP-IB data output & remote con-
trol.
Remotely controllable functions:
Function (L, C, R/ESR, ALCR)
Loss (D, Q)
LCR range
DQ range
Circuit mode
Test frequency € level
Trigger
Self test
Data output: C - D/Q, L - D/Q, R/ESR
Internal function allowable subsets:
SH1, AH1, T5, L4, RLI1, DCI, SRi
and DTI.
Data output format: Either of two formats
may be selected. Switchable at rear
panel (no + sign outputs).
Format A.
SFPT+N.NNNE+NN, SF+N.NNCRYLF)
Format B.
SFFT+N.NNNE+NNCRXLF)
SF+N.NNCRÚF)
SFET
L_Test Frequency
Measurement Équivalent Circuit
—Measurement Status
SF
Lt ote measurement DorQ
Measurement status
Option 010: 100Hz test frequency instead of
120Hz.
ACCESSORIES AVAILABLE
16061A: Test fixture, direct coupled, 5-terminal
Two kinds of inserts are included for
components with either axial or radial
leads. Usable on all ranges of 4262A.
16062A: Test cable with alligator clips, 4-termi-
nal. Useable for low impedance meas-
urements. Measurement range at 1kHz
is L < 2H, C 2 200nF and R $ 10kN.
[For L and C measurements, these
ranges increase by x10 at 120 (100)Hz
and decrease by same factor at
10kHz].
168063A: Test cable with alligator clips, 3-termi-
nal. Useable for high impedance meas-
urements. Measurement range at 1kHz
is L 23mH, CL 10uF and R 2 2000.
[For L and C measurement, these
ranges increase by x10 at 120(100)Hz
and decrease by same factor at
10kHz!.
Section I Model 4262A
Table 1-2
Table 1-2. General Information.
Measurement Times (typical): ESR (Equivalent Series Resistance)
For a 1000 count measurement on a low Measurement:
loss component on a fixed range: Following tables show ESR measure-
ment range for capacitors and inductors.
Test Frequency Function Meas. Time ED
Е ® e fn
5 > = т. = ar
}kHz, 10KHz C/L 220-260ms 3 РЕ Е Е Digt Display Dig ыы ay
R 120-160ms = iy m
omi-
120(100)Hz C/L 900ms Wor 1
R TOOMS | 10m: 100
=
When autorange is selected the following 100047 Tom
1 E
times per range step must be added to S ul 10000.
the above times: $
8 Hub 004
1kHz, 10kHz 45ms/180ms :
120(100)Hz 150ms/670ms § wr Wer
When U-CL is displayed, the faster
ranging time is selected. Mat lu
Reading Rate: PEUR MITO $] a =
Internal - Approx. 30ms between end of Ç Measurement Range of ESR (5)
measurement and start of next cycle. EE
so napa ЗЕ = = = Zori 3or4
External - Measurement cycle is initiated t= = = Digit Display Digit Display
by external trigger input. Lp 167 100 7
Юн 1; 10
High D Factor Accuracies: =
Typical = mi 100mb 1
Pa
. а
(2 2, on 10.00 range) Sol tr
Circuit Mode Accuracy g 1
а Иа Imp Hm Su
e 5 % +(2+1000/Cx) E ma /
5 Or 1004 - mm Te
of ANA 5 2 + (5+ Cx/500) E
- ob Mal 100
A | 5%+(5+Lx/500) 1
dat det 0 100 1k 10k
Te 570 +(3+200/Lx) Measurement Range of ESR (9)
MEASURING TIME
(ms) --- When LCR RANGE is set to MANUAL ---
Cp, La
Ls,Lp
120 Ну
Rs
Re
Ё
pu
5 Cp, ia
9 at 1 K Hz
= Rp
( Counts >
Sum of Counts en LCR and DISSIPATION FACTOR Displays
Model 4262A
1kHz and 10kHz and about 900 milliseconds at
120Hz. The wide range capability of the 4262A
enables a measurement range from small capaci-
tances such as mica capacitors and the para-
sitic capacitance of a semiconductor device
through high capacitances such as the measurement
of electrolytic capacitors to be covered. A wide
range of inductance measurements from the in-
ductance of a high frequency transformer to that
of a power transformer can be measured. The wide
resistance range permits the measurement of wire-
wound resistors through the measurement of solid
resistors. In parallel capacitance measurements,
either a test signal level of 1Vrms, or 50m Vrms
can be selected.
1-7. The 4262A has the capability of making
capacitance, inductance, and resistance deviation
measurements, This function is enabled by pushing
the A LCR switch to display the deviation of a re-
ference value. When the A LCR switch is depressed
the reference value is obtained and memorized
from the preceding measurement. The practi-
cal use of this feature is evident when it is desired
to make a measurement on a variable capacitor:
First, the minimum value is measured, then the A
LCR button is pushed. Minimum to maximum capa-
citance is now displayed as the capacitor is rotated
through its range. For parallel capacitance meas-
urements, test signal levels of either 1Vrms or
50mVrms may be selected. Other versatile 4262A
capabilities and features are, for example, the use
of internal and external dc bias voltages, LC zero
adjustment, and options providing BCD output,
HP-IB interfacing capability, or a comparator func-
tion.
18. SPECIFICATIONS.
1-9. Complete specifications of the Model 4262A
LCR Meter are given in Table 1-1. These specifi
cations are the performance standards or limits
against which the instrument is tested. The test
procedures for the specifications are covered in
Section IV Performance Tests. Table 1-2 lists gen-
RE TTT M0
Figure 1-2. Serial Number Plate.
Section I
Paragraphs 1-7 to 1-16
eral information. General information is not speci-
fications but is typical characteristics included as
additional information for the operator. When the
4262A LCR Meter is shipped from the factory, it
meets the specifications listed in Table 1-1.
1-10. SAFETY CONSIDERATIONS.
1-11. The Model 4262A LCR Meter has been
designed to conform to the safety requirements of
an IEC (International Electromechanical Com-
mittee) Safety Class I instrument and is shipped
from the factory in a safe condition.
1-12. This operating and service manual contains
information, cautions, and warnings which must be
followed by the user to ensure safe operation and
to maintain the instrument in a safe condition.
MANUAL.
1-14. Hewlett-Packard uses a two-section nine
character serial number which is marked on the se-
rial number plate (Figure 1-2) attached to the in-
strument rear panel. The first four digits and the
letter are the serial prefix and the last five digits are
the suffix. The letter placed between the two sec-
tions identifies country where instrument was
manufactured. The prefix is the same for all iden-
tical instruments; it changes only when a change is
made to the instrument. The suffix, however, 1s as-
signed sequentially and is different for each in-
strument. The contents of this manual apply to in-
struments with the serial number prefix(es) listed
under SERIAL NUMBERS on the title page.
1-15. An instrument manufactured after the
printing of this manual may have a serial number
prefix that is not listed on the title page. This un-
listed serial number prefix indicates the instrument
is different from those described in this manual.
The manual for this new instrument may be ac-
companied by a yellow Manual Changes suppie-
ment or have a different manual part number,
This supplement contains “change information”
that explains how to adapt the manual to the
newer instrument.
1-16. In addition to change information, the
supplement may contain information for correct-
ing errors (called Errata) in the manual. To keep
this manual as current and accurate as possible,
Hewlett-Packard recommends that you periodically
request the latest Manual Changes supplement. The
supplement for this manual is identified with this
manual’s print date and part number, both of
which appear on the manuals title page. Com-
plimentary copies of the supplement are availabie
from Hewlett-Packard. If the serial prefix or
number of an instrument is lower than that on title
page of this manual, see Section VII Manuai
Changes.
1-7
Section I
Paragraphs 1-17 to 1-33
1-17. For information concerning a serial number
prefix that is not listed on the title page or in the
Manual Changes supplement, contact your nearest
Hewlett-Packard office.
1-18. OPTIONS.
1-19. Options for the Model 4262A LCR Meter
are available for adding the following capabilities:
Option 001: BCD Parallel Data Output.
Option 004: Comparator. A comparator func-
tion providing GO/NO-GO judge-
ment with HIGH and LOW limits
for LCR and D/Q.
Option 101: HP-IB Interface.
Option 010: 100Hz Test Frequency.
(instead of 120Hz)
Options 907, 908 or 909 are handle or rack
mount kits. See paragraph 1-29
for details.
Option 910: Extra Manual.
1-20. OPTION 001.
1-21. The 4262A option 001 provides separate
BCD parallel data output for L, C, R/ESR and
dissipation factor or quality factor simultaneously
from the two rear panel connectors. With this op-
tion, external data processing devices such as a
digital printer can be used with the 4262A.
1-22. OPTION 004.
1-23. The 4262A Option 004 provides for
GO/NO-GO judgement by comparing L, C, R/ESR
and D/Q values to HIGH and LOW limits. Three
judgement outputs are provided: LED lamp dis-
play, relay contacts, or TTL level voltages (open
collectors):
HIGH . .measured value is not less than HIGH
limit.
IN . . . measured value is less than HIGH limit
and not less than LOW limit,
LOW. measured value is less than LOW limit.
Model 4262A
1-24. OPTION 101.
1-25. The 4262A Option 101 provides interfac-
ing functions to both transfer L, C, R/ESR and
D/Q data to HP Interface Bus line and to receive
remote control signals from HP Interface Bus line.
1-26. OPTION 010.
1-27. The 4262A Option 010 provides test fre-
quencies of 100Hz, 1kHz, and 10kHz (100Hz is
used Instead of standard 120Hz). All other electri-
cal performance is the same as that of standard in-
strument.
1-28. OTHER OPTIONS.
1-29. The following options provides mechanical
parts necessary for rack mounting and hand carry-
ing:
Option 907: Front Handle Kit,
Option 908: Rack Flange Kit.
Option 909: Rack Flange and Front Handle
Kit.
The installation procedures for these options are
detailed in section II
1-30. The 4262A Option 910 provides an extra
copy of the operating and service manual,
1-31. ACCESSORIES SUPPLIED.
1-32. Figure 1-1 shows the HP Model 4262A
LCR Meter, power cord (HP Part No. 8120-1378),
and fuses (HP Part No, 2110-0007 and 2110-0202),
1-33. ACCESSORIES AVAILABLE.
1-34. For effective and easy measurement, three
styles of fixtures and leads for the measurement
of various components are available. These are
listed in Table 1-1, A brief description of each of
these fixtures and leads is given in Table 1-3. Refer
to Section III Figure 3-3 on page 3-8 for detailed
information on these devices.
Section 1
Model 4262A Table 1-3
Table 1-3. Accessories Available.
Model Description
HP 16061A
Test Fixture {direct coupled type) for
general measurement of both axial and
vertical lead components.
HP 16062A
Test Leads (with alligator clips) useful
low resistance (less than 10KM} measure-
ments.
HP 16063A
`
“р
+
Eos
i
y # LE
en
a
E
<=.
nF
у
Trey
Test Leads (with alligator clips) for
general component measurement and
especially useful for high impedance
measurements,
L
oh
о
L
ни
e я
AN не
.
ee
a
Г
am
a.
Extender Board used for 4262A
troubleshooting.
1-9
Section I Model 4262A
Table 1-4
Table 1-4. Recommended Test Equipment.
Instrument Critical Specifications fecommen ded *Use
Frequency Counter Frequency Range: 40Hz to 10kHz HP 5300A/ P
Sensitivity: 50m Vrms min. w 5306A
Capacitance Standard Capacitance Values: 100pF, 1000pF, 10nF, ! GR Type 1413 PA
(See para. 4-3) 100nF, 1000nF and 10uF GR Type 1417
Resistance Standard Resistance Values: 1k, 10k, 100k and GR Type 1443-Y P, À
(See para. 4-3) 10MO
Inductance Standard Inductance Value: 100mH GR Type 1482-L P
(See Para. 4-3)
DC Voltmeter Voltage Range: 1V to 10V HP 5300A/ P, A
Oscilloscope Bandwidth: 10MHz min. HP 1740A AT
Vertical Sensitivity: bmV/div.
Horizontal Sweep Rate: 1us/div.
Signature Analyzer HP 5004A
Current Tracer HP 547A T
Service Kit Signature Analysis Test Board HP P/N: T
04262-87002 |
DUT Box Comprises L, C and R components whose HP 16361A Р, А
values are calibrated at 120Hz and 1kHz.
DUT Box Comprises L, C and R components whose HP 16362A P, A
values are calibrated at 10kHz,
*P=Performance Test =~ A=Adjustments 1T=Troubleshooting
1-10
Model 4262A
Section IT
Paragraphs 2-1 to 2-11
SECTION II
INSTALLATION
2-1. INTRODUCTION.
2-2. This section provides installation instructions
for the Model 4262A LCR Meter. The section also
includes information on initial inspection and
damage claims, preparation for using the 42624,
packaging, storage, and shipment.
2-3. INITIAL INSPECTION.
2-4. The 4262A LCR Meter, as shipped from the
factory, meets all the specifications listed in Table
1-1. On receipt, inspect the shipping container for
damage. If the shipping container or cushioning
material is damaged, notify the carrier as well as
the Hewlett-Packard office and be sure to keep the
shipping materials for carrier's inspection until the
contents of the shipment have been checked for
completeness and the instrument has been checked
mechanically and electrically. The contents of the
shipment should be as shown in Figure 1-1. The
procedures for checking the general electrical op-
eration are given in Section III (Paragraph 3-5 Ba-
sic Operating Check) and the procedures for
checking the 4262A LCR Meter against its specifi-
cations are given in Section IV. Firstly, do the self
test. If the 4262A LCR Meter is electrically ques-
tionable, then do the Performance Tests to deter-
mine whether the 4262A has failed or not. If con-
tents are incomplete, if there is mechanical damage
or defects (scratches, dents, broken switches, etc.),
or if the performance does not meet the self test or
performance tests, notify the nearest Hewlett-
Packard office (see list at back of this manual). The
HP office will arrange for repair or replacement
without waiting for claim settlement.
2-5, PREPARATION FOR USE.
2-6. POWER REQUIREMENTS.
2.7. The 4262A requires a power source of 100,
120, 220Volts ac +10%, or 240Volts ac +5%, -10%,
48 to 66Hz single phase. Power consumption is
approximately 55 watts.
WARNING
IF THIS INSTRUMENT IS TO BE
ENERGIZED VIA AN EXTER-
NAL AUTOTRANSFORMER FOR
VOLTAGE REDUCTION, BE
SURE THAT THE COMMON
TERMINAL IS CONNECTED TO
THE NEUTRAL POLE OF THE
POWER SUPPLY.
2.8. LINE VOLTAGE AND FUSE SELECTION.
CAUTION
BEFORE TURNING THE 4262A
LINE SWITCH TO ON, VERIFY
THAT THE INSTRUMENT IS SET
TO THE VOLTAGE OF THE
POWER SUPPLIED.
2-9. Figure 2-1 provides instructions for line volt-
age and fuse selection. The line voltage selection
card and the proper fuse are factory installed for
the voltage appropriate to instrument destination.
CAUTION
USE PROPER FUSE FOR LINE
VOLTAGE SELECTED.
CAUTION
MAKE SURE THAT ONLY FUSES
FOR THE REQUIRED RATED
CURRENT AND OF THE SPECI-
FIED TYPE ARE USED FOR RE-
PLACEMENT. THE USE OF
MENDED FUSES AND THE
SHORT-CIRCUITING OF FUSE
HOLDERS MUST BE AVOIDED.
2-10. POWER CABLE.
2.11. To protect operating personnel, the
2-1
Section II Model 4202A
Paragraph 2-12
SELECTION OF OPERATING VOLTAGE
Operating voltage is shown in module window
and is usually set to 120V at factory.
window to left.
2. Pull FUSE PULL lever and rotate to left.
This removes line fuse.
3. Select operation voltage by orienting PC
board to position desired voltage on top-
left side. Push board firmly into module
siot.
À. Rotate FUSE PULL lever back to its normal
position and re-insert fuse in hoider be
careful to select correct fuse value.
Operating Voltage Fuse
HP Part No.
100Vac or 120Vac | 2110-0007
220Vac or 240Vac 2110-0202
Description
1 A 250V Slow Blow
0.5A 250Y Slow Blow
Figure 2-1. Voltage and Fuse Selection.
— 1. Disconnect power cable and slide module ~~ |
National Electrical Manufacturers Association
(NEMA) recommends that the instrument panel
and cabinet be grounded. The Model 4262A is e-
quipped with a three-conductor power cable which,
when plugged into an appropriate receptacle,
grounds the instrument. The offset pin on the
power cable is the ground wire,
2-12. To preserve the protection feature when
operating the instrument from a two contact
outlet, use a three prong to two prong adapter
(HP Part No. 5080-3149) and connect the
green grounding tab on the adapter to power
line ground.
2-2
CAUTION
THE MAINS PLUG MUST ONLY
BE INSERTED IN A SOCKET
OUTLET PROVIDED WITH A
PROTECTIVE EARTH CONTACT.
THE PROTECTIVE ACTION
MUST NOT BE NEGATED BY
THE USE OF AN EXTENSION
CORD (POWER CABLE) WITH-
OUT PROTECTIVE CONDUCTOR
(GROUNDING).
Model 4262A
2-18. Figure 2-2 shows the available power cords,
which may be used in various countries including
the standard power cord furnished with the in-
strument. HP Part number, applicable standards for
power plug, power cord color, electrical character-
istics and countries using each power cord are
listed in the figure. If assistance is needed for se-
lecting the correct power cable, contact nearest
Hewiett-Packard office.
2-14. interconnections.
2-15. When an external bias is applied to the
sample capacitor through DC BIAS input con-
nectors on the 4202A rear panel, both plus and
minus sides of the external power supply should be
connected to the plus and minus sides of the
4262A EXT DC BIAS connector, respectively. ....
CAUTION
THE MAINS PLUG MUST BE IN-
SERTED BEFORE EXTERNAL
CONNECTIONS ARE MADE TO
MEASURING AND/OR CON.
TROL CIRCUITS.
2-16. Operating Environment.
2-17. Temperature. The instrument may be op-
erated in temperatures from 0°C to +55°C.
2-18. Humidity. The instrument may be operated
in environments with relative humidities to 95%
to 40°C. However, the instrument should be
protected from temperature extremes which cause
condensation within the instrument.
2-19. Installation instructions.
2-20. The HP Model 4262A can be operated on
the bench or in a rack mount. The 4262A is ready
for bench operation as shipped from the factory.
For bench operation a two-leg instrument stand is
used. For use, the instrument stands are de-
signed to be pulled towards the front of instrument,
2-21. installation of Options 907, 908 and 909.
2-22. The 4262A can be installed in a rack and
be operated as a component of a measurement
system. Rack mounting information for the 4262A
is presented in Figure 2-3.
Section Ц
Paragraphs 2-13 to 2-28
2-23. STORAGE AND SHIPMENT.
2-24. Environment.
2-25. The instrument may be stored or shipped
in environments within the following limits:
Temperature ...... „40°C to +75°C
Humidity. . .......... to 95%
Altitude. . . ............ 50,000ft
The instrument should be protected from temper-
ature extremes which cause condensation inside
the instrument.
2-26. Packaging.
2-27. Original Packaging. Containers and mat-
erials identical to those used in factory packaging = ...
are available through Hewlett-Packard offices. If
the instrument is being returned to Hewlett-
Packard for servicing, attach a tag indicating the
type of service required, return address, model
number, and fuil serial number. Also mark the
container FRAGILE to assure careful handling. In
any correspondence, refer to the instrument by
model number and full serial number.
2-28. Other Packaging. The following general in-
structions should be used for re-packing with com-
mercially available materials:
a. Wrap instrument in heavy paper or plastic. If
shipping to Hewlett-Packard office or service
center, attach tag indicating type of service
required, return address, model number, and
full serial number.
b. Use strong shipping container. A double-wall
carton made of 350 pound test material is
adequate.
с. Use enough shock absorbing material (3 to 4
inch layer) around al! sides of instrument to
provide firm cushion and prevent movement
inside container. Protect control panel with
cardboard.
d. Seal shipping container securely.
e. Mark shipping container FRAGILE to ensure
careful handling.
f. In any correspondence, refer fo instrument by
model number and full serial number.
2-3
Section H
Figure 2-2
Model 4262A
OPTION 980 United Kingdom
Earth
DD
ji Ntra
Line
Plug: BS1363A, 250V
Cable: HP 8120-1351
OPTION 901
Australia/New Zealand
Line w=
Plug : NZSS 198/AS C112, 250V
Cable : HP 8120-1369
OPTION 902 European Continent
- Earth
Earth
> Veutral
Plug : CÉE-VH, 250V
Cable: HP 8120-1689
OPTION 903 U.5./ Canada
Earth
a y
> Line
Neutral 77707
Plug: NEMA 5-15P, 125V, 15A
Cable : HP 8120-1378
OPTION 905* Any country
e LIE
Neutral Te Earth
Plug: CEE 22-VI, 250V
Cable: HP 8120-1396
OPTION 906 Switzerland
Neutra!
Plug: SEV 1011.1959-24507 Type 12, 250V
Cable : HP 8128-2164
OPTION 912 Denmark
Neutral ——
Plug : DHCR 107, 220V
Cable : HP 8120-2956
OPTION 917 India/Republic of S.Africa
Ground-eacth
Line =
Neuiral
Plug: SABS 164, 250V
Cable: HP 8120-4211
NOTE: Each option number includes a
family’ of cords and connectors of various
materials and plug body configurations
(straight, 90 © etc.)
* Plug option 905 is frequently used for
interconnecting system components and
peripherals.
2-4
Figure 2-2. Power Cables Supplied
Model 4262A Section II
Figure 2-3
Option Description Kit Part Number
907 Handle Kit 5061-9089
908 Rack Flange Kit 5061-9677
909 Rack Flange & Handle Kit 5061-9683
1. Remove adhesive-backed trim strips (1) from
side at right and left front of instrument.
handle (3) to sides at right and left front of in-
strument with screws provided and attach
trim (4) to handle.
\
iE 3. RACK MOUNTING: Attach rack mount
> flange (2) to sides at right and left front of in-
Es strument with screws provided.
4, HANDLE AND RACK MOUNTING: Attach
front handle (3) and rack mount flange
together to sides at right and left front of in-
strument with screws provided.
5. When rack mounting (3 and 4 above), remove
all four feet (lift bar at inner side of foot, and
siide foot toward the bar).
Figure 2-3. Rack Mount Kit
.2. HANDLE INSTALLATION: Attach front |...
Section II
Paragraphs 2-29 to 2-34
2-29. OPTION INSTALLATION.
2-30. When it is desired to add one or two of the
available optional features to a standard 4262A
instrument, perform the installation as follows:
Refer to option installation illustrations
on facing page.
a. Push LINE switch to off.
b. Remove instrument top cover.
c. Follow the appropriate paragraph below.
2-51. OPTION 001 BCD DATA OUTPUT
INSTALLATION.
a. Remove the left side middle and lower blind
covers from the rear panel.
b. Install two 50-pin connector assemblies in the
openings.
c. Set BCD switch of SW1 on A23 board
assembly (RED/ORANGE GUIDE, P/N:
04262-66523 or 04262-66623) from OFF to
opposite position, This board is located third
from front on the right side.
d. Connect cable attached to A23 board (shown
below) between A23 and A35 BCD Option
board assemblies (P/N: 04262-66535). Install
A35 in RED/GREEN GUIDE option
receptacie.
e. Plug 2 each flat cable assemblies from A35
BCD Option board into connector boards of
rear panel connector assemblies,
f. install instrument top cover.
2-32.
Model 4262A
OPTION 004 COMPARATOR
INSTALLATION.
Refer to Fig 2-4 for installation procedure.
2-33.
a.
board assembly. No other cable assembly
COUPLING OPTION 004 COMPARATOR
WITH OPTION 001 BCD DATA OUTPUT
INSTALLATION.
Set CMP (comparator) and BCD option
switches of SW1 ON A23 board assemblies
(RED/ORANGE GUIDE, P/N: 04262-66523
or 04262-66623) from OFF to opposite
position. This board is located third from
front on the right side.
. Connect cables attached to A23 board be-
tween A23 and A24 comparator option BCD
change is necessary for this combination of
options.
. Refer to Paragraphs 2-31 and 2-32 for other
installation procedures.
2-34. OPTION 101 HP-IB REMOTE CONTROL
a.
AND DATA OUTPUT INSTALLATION.
Remove right side blind covers from rear
panel.
Install connector board assembly (P/N:
04262-66503) in the opening and mount with
washers and nuts included with assembly.
. Set the HP-IB switch of SW1 on A23 board
assembly from OFF to opposite position. The
A23 board is located on the right side third
from front.
. Connect cable assembly attached to A25
board between A23 and A25 HP-IB option
board assemblies (P/N: 04262-66525). Install
A25 in RED/GREEN GUIDE option
receptacle.
‚Plug flat cable assembly from connector
board assembly P/N: 04262-66503 into A25
board assembly (installed in RED/GREEN
GUIDE receptacle).
OPTION 101 IS NOT COMPATIBLE
WITH OPTIONS 001 AND 004.
2-6
Model 4262A Section 11
Figure 2-4
r “
8120-6380
Front Panel Assembly Board Assembly 04262-66529.
he ge Гат - FETO 65520
5. Connect cable assembly as shown above, Set CMP com
paratur) of SWI on AZ3 hoard (P/N: 04 262-66523 or
(4262-66623) from OFF to opposite position. Reinstall
| this board in socket with ORANGE ‘RED guide. y
Cable Assembiv f
(PIN: 8120-0360}
<< i \ RED
A es” YELLOW
Connector Assembly Screw >
(PIN: ANGO-102601 P/N. 0520-0129)
4 : “
6. Connect one end of fiat vahle to AZ4 {F/N: 04262-66524}
£& board. Install board in RED/YELLOWGUIDE. J... 1.
Top Cover ”
Bottom Cover
te J
7. Plug flat cable assembly from A24 comparator option
pn board to connector board of connector assembly on rear
| panel. J
Г ь
UPPER TRIM
\ р { |
F \ pr "
om ини
acon ме базе
80080 Con son 508
i A
«u 4. Install connertor assembly, y 9, Remove blank panel from right side of front panel. 4
„” . F rima + o 4 AM
ORANGE RED Front Panel Assembly MOTHER BOARD |
for comparator \ ]
1G. Install new front panel assembly and connect atiached
4. Pull out board third from front on the right side as vinwed fiat cable assembly to connector on mother board.
{ from front panel {P/N: 04262-66523 or (4262-66623). |
{ 11. Install upper trim. top and bottom covers ||
Figure 2-4. Option Installation Illustrations. 2-7
section H
Paragraphs 2-35 and 2-36
Table 2-1.
Option Components
Model 4262A
Components
Option Function
HP Part No. Q'ty Description
001 BCD Data 04262-66535 1 A35 Board Assembly
Output 5060-4020 2 Connector Board Assembly
8120-0360 i Fiat Cable Assembly
004 Comparator 04262-65004 1 Front Panel Assembly
04262-66524 1 A24 Board Assembly
5060-4020 i Connector Board Assembly
8120-0360 1 Flat Cable Assembly
101 HP-IB 04262-66525 1 A25 Board Assembly
Compatibility | 04262-66503 1 A3 Connector Board Assembly
A BI20-03560...... - EL - Fiat Cable Assembly
0380-0644 2 Stud for A3 Board Assembly
2190-0577 2 Spring Washer
Note: To mount Connector Board assemblies, use rear
panel blank plate retaining screws (Part No,
0520-0129) removed for the option installation.
Model 4262A
Section II
Paragraphs 3-1 to 3-6
SECTION III
OPERATION
3-1. INTRODUCTION.
3-2. This section provides the operating informa-
tion to acquaint the user with the 4262A LCR
Meter. Basic product features and characteristics,
measurement procedures for various applications,
an operational check of the fundamental electrical
functions, and operator maintenance information
is presented in this section. Operating cautions
throughout the text should be carefully observed.
3-3. PANEL FEATURES.
be done under all conditions of FUNCTION and
TEST SIGNAL settings. Tests under certain com-
bined conditions of FUNCTION and TEST
SIGNAL settings are done for five ranges. A test
for a range ends with a display of PASS (normal
operation) or FAIL (abnormal operation) and then
next range test is started. Range shifting for this
test is done automatically from lower to higher.
LER
1010
“3-4. Front and rear panel features for the 42624
are described in Figures 3-1 and 3-2. Description
numbers match the numbers on the photographs.
Other detailed information for panel displays and
controls are covered in the Operating Instructions
(paragraph 3-7).
35, SELF TEST (Basic Operating Check).
[WARNING |
ANY INTERRUPTION OF THE
PROTECTIVE GROUNDING CON-
DUCTOR INSIDE OR OUTSIDE
THE INSTRUMENT OR DISCON-
NECTION OF THE PROTECTIVE
EARTH TERMINAL IS LIKELY
TO CAUSE THE INSTRUMENT TO
BE DANGEROUS. INTENTIONAL
INTERRUPTION IS PROHIBITED.
WARNING |
WHENEVER IT IS LIKELY THAT
THE PROTECTION OFFERED BY
FUSES HAS BEEN IMPAIRED,
THE INSTRUMENT MUST BE
MADE INOPERATIVE AND BE
SECURED AGAINST ANY UNIN-
TENDED OPERATION.
| CAUTION |
BEFORE ANY OTHER CONNEC-
TION IS MADE, THE PROTEC-
TIVE EARTH TERMINAL MUST
BE CONNECTED TO A PROTEC-
TIVE GROUNDING CONDUCTOR.
3-6. Functional operation of the Model 4262A
should be confirmed by the SELF TEST switch
before measuring samples of interest. This test can
1010
All the combinations of FUNCTION and TEST
SIGNAL switch settings are listed below. Even if
the FUNCTION or TEST SIGNAL switch settings
are limited for proposed sample measurement, all
combined conditions should be tested.
Pushbutton Switch Setting * | Connectors
{C}, (120 H2) (SELF TESTI™** Open between
(C), (1 kHz} (SELF TEST) THIGH side and
(C), (10 kHz), (SELF TEST)
(C), (LOW LEVEL), (10 kHz), (SELF TEST)
(C), (LOW LEVEL), (1 kHz), (SELF TEST)
(C), (LOW LEVEL), (120Hz) (SELF TEST)
(1), (10H), (SELF TEST | TTT
(1), (16h), (SELF TEST) D en
(L), (1043), (SELF TEST) and LOW side.
(RESP). (Old), (SELF TEST)
(R/ESR), (1 kHz), (SELF_ TEST)
(R/ESR), (120H2).(SELF_TEST)
* When FUNCTION or TEST SIGNALS
switch setting is changed, the SELF TEST
switch is automatically disabled. Therefore,
whenever a new setting is made, push the
SELF TEST switch again.
For ** see page 3-5
Section III
Figure 3-1
Model 4262A
LINE ON/OFF switch: Turns instrument
on and readies instrument for measurement
Circuit Mode Indicator: LED lamp, next to
equivalent measuring circuit being used,
lights. Sample connected to UNKNOWN
terminals is measured in an equivalent
circuit selected by FUNCTION (13) and
CIRCUIT MODE switches and is indi-
cated by appropriate LED lamp. Equivalent
circuits are shown as electronic circuit sym-
bols at the left of indicator lamps. Desired
circuit parameter of component is meas-
ured in one of the following selected circuit
Parallel capacitance
modes:
Parallel resistance
Series capacitance
Series resistance —! MM
Parallel inductance Lo
Series inductance
YM
Series resistance
Trigger Lamp: Tums on during sample
measuring period. Tums off during period
when instrument is not taking measure-
ment (or hold period). There is one turn-
on-and-off cycle per measurement. This
lamp turns on and off repeatedly when
TRIGGER (3) is set to INT.
LCR Display: Inductance, capacitance or
resistance value including the decimal point
and unit is displayed in 3-% digit decimal
number from 0000 to 1999. If the sample
value exceeds 1999 in a selected range,
O-F(Over-Flow) appears in this display. This
display also shows PASS or FAIL when
SELF TEST is performed.
D/Q Indicator: In a capacitance or induct-
ance measurement, this indicator indicates
which of D (dissipation factor) or Q (quali-
ty factor) is displayed in D/Q display (6).
In resistance measurement, this indicator is
also lit (however, D or Q indication has no
meaning and D/Q display (5) is left blank),
D/Q Display: Value for dissipation factor
or quality factor is displayed in capacitance
and/or inductance measurement. In resis-
tance measurement, this display is kept
blank.
RANGE Indicator: 'The range automati-
cally or manually selected is indicated by
LED lamp. The table printed above the
LED array shows the measurement ranges
of the Model 4262A.
TEST SIGNAL These pushbuttons enable
selection of measurement frequency“
120Hz, 1kHz or 10kHz and that of low test
voltage of the signal applied to sample to
be tested. LOW LEVEL switch is effective
only in parallel capacitance measurements,
supplying a test voltage of 56mVrms. For
units equipped with option 010, arrow on
pushbutton (120Hz) points to 100Hz,
3-2
Figure 3-1. Front Panel Features (sheet 1 of 2).
Model 4262A
Section 111
Figure 3-1
©
TRIGGER: These pushbuttons select trig-
ger mode, INT, EXT or HOLD/MANUAL,
INT key provides internal trigger which en-
ables instrument 10 make repeated auto-
matic measurements. In external trigger
mode (EXT), trigger signal should be ap-
plied to either of following two con-
nectors: (1) EXT TRIGGER input con-
nector on the rear panel (2) 50 pin con-
nector of Option 001 or 004 on the rear
panel. HOLD/MANUAL trigger mode pro-
vides trigger signal for one measurement
cycle when this key is depressed.
LOSS: These pushbuttons select whether
D or Q value is displayed in the D/Q
display (5) in capacitance or inductance
measurements.
D/Q RANGE: These pushbuttons select
ranging method for loss measurement.
AUTO: Optimum D/Q range is selected by
internal logic circuit.
MANUAL: D/Q range is fixed to a range,
Range change is done by depressing the
STEP key on the right.
CIRCUIT MODE: Appropriate circuit
mode for taking a measurement is select-
ed and set with these pushbuttons. A
parallel equivalent circuit is selected by
PRL key and series equivalent circuit by
SER key. When AUTO key is pushed, the
instrument automatically selects the appro-
priate parallel or series equivalent circuit.
FUNCTION: These pushbuttons select
electrical circuit parameter to be measured
as follows:
C: Capacitance together with dissipation
factor (D) or quality factor (Q).
L:Inductance with dissipation factor (D) or
quality factor (Q).
R/ESR: Resistance or Equivalent Series
Resistance.
ALCR: Difference in L, C, or R value be-
tween the value of the sample under test
and the internally stored value obtained
by a measurement just before ALCR key
is depressed.
LCR RANGE; These pushbuttons select
ranging method for LCR measurement.
AUTO: Optimum range for the sample
value is automatically selected.
MANUAL: Measurement range is fixed
(even when the sample connected to the
UNKNOWN terminals is changed).
Range change is done by depressing
DOWN or UP key on the right.
SELF TEST: This pushbutton performs
automatic check for checking the basic
operation of Model 4262A. If normal oper-
ation is confirmed, “PASS” is displayed in
LCR display O If wrong performance is
detected, a display of “FAIL” appears. See
paragraph 3-5 for details.
ZERO Adjustment Controls: These adjust-
ments provide proper compensation for
cancelling stray capacitance and residual
inductance which are present when a test
fixture is mounted on the UNKNOWN
terminals. Connectors are kept open for
cancelling stray capacitance and shorted
for cancelling residual inductance.
DC BIAS Selector Switch: This switch per-
mits selection of internal DC bias voltage
applied to sample (i.5Vdc, 2.2Vde, or
6.0Vdc). When switch is set to EXT, it is
used to apply external bias voltage from
rear DC BIAS input connectors. OFF posi-
tion is selected if no bias voltage is nec-
essary.
UNKNOWN Terminals: Consist of four
terminals: High current terminal (Hcur),
High potential terminal (Hror ), Low
potential terminal (Lror ) and Low cur-
rent terminal (Lcur), A five-terminal con-
figuration is constructed by adding the
GUARD terminal (5). A three-terminal
configuration is constructed by shorting
High terminals and Low terminals together
with shorting bars. Under DC Bias opera-
tion, the high terminals have a positive
DC voltage with respect to LOW terminals.
GUARD Terminal: This is connected to
chassis ground of instrument and can be
used as Guard terminal for increasing ac-
curacy in certain measurements.
HP-IB Status Indicator and LOCAL switch.
LED lamps for SRQ, LISTEN, TALK, and
REMOTE which indicate status of interface
between the 4262A (Option 101) and
HP-IB controller. LOCAL switch enables
front panel controls instead of remote
control signals from HP-IB line.
Figure 3-1. Front Panel Features (sheet 2 of 2).
3-3
Section HI
Figure 3-2
Model 4262A
BCD D/Q DATA OUTPUT Connector:
BCD parallel data of measured dissipation
factor (D) or quality factor (Q) are output-
ted through this 50 pin connector installed
on the 4262A Option 001,
BCD LCR DATA OUTPUT Connector:
With Option 001, BCD parallel data for in-
ductance, capacitance and resistance meas-
ured values are outputted through this 50
pin connector.
COMPARATOR OUTPUT Connector: The
4262A Option 004 provides comparator
decision outputs for LCR and D/Q through
this 50 pin connector.
HP-IB Digital Bus Connector: This 24 pin
connector conveys bus signals and remote
programming instructions to the 4262A
Option 101 and transmits data from the
4262A Option 101 to the bus.
®
Address Switch: This seven section switch
sets address code of 4262A Option 101 and
TALK ONLY or ADDRESSABLE mode of
operation.
EXT DC BIAS Connector: External de
bias voltage can be applied to the sample
up to the maximum voltage of plus 40V
through this connector.
EXT TRIGGER Connector: This connector
is used for externally triggering the instru-
ment by inputting an external trigger signal.
TRIGGER SWITCH on front panel should
be set to EXT,
3-4
Figure 3-2, Rear Panel Features.
Model 4262A
ЖЖ
ok sk ok
Two HIGH side terminals and two LOW
side terminals should be connected with
the shorting strap, for each configuration
of the UNKNOWN terminals. When the
UNKNOWN terminal configuration is not
appropriate, for example, shorted (C) or
open (L), display will show FAIL. 1 (be-
cause they result from different causes,
FAIL 2 or FAIL 3 are rarely displayed).
НО
1010
Setting change required is only the
underlined switch setting.
If FAIL is displayed, check the UNKNOWN ter-
minal configurations as follows:
а That the two HIGH side terminals (cun ee em ee ae re rs SE
Hror) and the two LOW side terminals
(Lcur - Lror) are properly shorted.
(2) That short or open conditions properly exist
between HIGH and LOW side terminals.
(3) That GUARD terminal is isolated (open)
from both of HIGH and LOW terminals.
Section II
If FAIL is still displayed (under the above condi-
tion), notify the nearest Hewlett-Packard office
with information detailing which combination of
settings show FAIL.
During SELF TEST, other controls are automati-
cally set as follows:
CIRCUIT MODE.... SER when FUNCTION
is set to L or R/ESR.
PRL when FUNCTION
is set to C.
LOSS. 1014444 448 44 0 4 40 4 4 0 4 4 88000 0 D
LCR RANGE ................. MANUAL
D/IQRANGE. ................. MANUAL
TRIGGER. 1224144008 648 6 a 4144400 INT
NOTE
TO ENSURE CORRECT RESULTS OF
SELF-TEST OPERATION IN L AND R
MEASUREMENT FUNCTIONS, CON-
NECT ALL (HIGH AND LOW SIDE) UN-
KNOWN TERMINALS TOGETHER WITH
A LOW IMPEDANCE STRAP (IF THIS
SHORT-CIRCUIT IS MADE AT THE
ENDS OF THE TEST LEADS, COR-
RECT RESULTS MAY NOT OCCUR).
Section III
Paragraphs 3-7 to 3-9
3-7. TEST SIGNALS.
3-8. Three test signal frequencies are available:
these are 120Hz, 1kHz and 10kHz sinusoidal wave-
forms which have a frequency accuracy of 3%. The
typical voltage applied to the sampie or current
flowing through the sample is specified in Table
3-1 for all test signal frequencies. A constant test
voltage is supplied to the sample when measuring
parallel parameters Lp, Cp, and Rp. The constant
current method is adopted for the measurement of
Ls, Cs, and Rs. The 50mVrms test voltage is used
only for Cp measurement.
Model 4262A
39. MEASUREMENT RANGE.
3-10. As given in Table 3-2, the 4262A has wide
measurement ranges. Seven or eight ranges are
available (depending upon measurement function)
and the appropriate range is automatically selected
for the value of sample connected to the 4262A
UNKNOWN terminals. For applications which re-
guire a fixed measurement range (such applications
are sometimes needed, for example, in inductance
measurements), manual range control is push-
button selectable. Four or five ranges, however, are
used in the series and parallel equivalent circuit
measurement modes. When the CIRCUIT MODE is
set to AUTO, the 4262A will automatically select
the appropriate circuit mode, range over the
measurement ranges shadowed in Table 3-2, settle
on the proper range, and measure the sample,
Table 3-1, Sample Voltage or Current.
CIRCUIT MODE
RANGE
Ls Lp Cs Cp Rs Rp
1 40mA rms — — iYrms (50mY rmsi* 40mA rms —
2 10mA rms —_— iVrms{50mVrms}* i0mA rms ———
3 ImA rms — 1Yrms (50mY rms)* ImA rms
4 100 uA rms 1V rms 16 LA rms [ 1Vrms (50mY rms) | 100 uA rms AV rms
5 10 uA rms iV rms 100 pA rms | 1Vrms H0mV rms)» 10 uA rms iV rms
6 IV rms У нА rms iV rms
7 1V rms i0mA rms —— IV rms
8 40mArms meme 1V rms
*When TEST SIGNAL is set to LOW LEVEL.
Table 3-2. Measurement Ranges.
; TEST Range
pre SIGNAL
MOD Frequency 1 2 3 4 5 6 7 8
120 Hz 0000mH | 00.00 H | 000.0H | 9000 H
Lp “I kHz 000.0mH | “0000 mi | 99.00 Н | 990.0 Н
10 kHz 00.00 mH | 008. 0mH -O00GmH.. 00 00H.
120 Hz | 0004H | 00.00mH | 000,0mH | 0000mH | 00.00 H
Ls iz | 990.0 | D0004H | 00,60mH | D000mH | 0000 mH
¡kHz | 00,00 uff | 000.0 4H | 0600 2H | 06,00mH ! 000.0mH
120H: [6000 pP | 00.00 nF | 000.0 nF | 6000 af | 00.00 4F
Cp | kHz © 060.0 pF | 0000 pF | 00.90 nF} G00.G AF | 0000 nF
10 kHz 08.00 pr | -000.0 pF {0000 pF | 00.00-1F ; 000.0 oF
120 Hz 0000 nF | 68.00 #F | 800.0 oF | 0000 4F | 00.00mF |
Cs В КН: 000.0 nF | 0000 nF | 00,00 £F | 000.0 uF | 0000 uF
10 kHz 00.00 nF | 000.0nF | var | DEDO ZP! 009.0 @Е
120 Hz 00000) | 99.00 КО | 000.0 кО | 0000 KO | 00, 00 MQ
Rp I kHz 000002 — | 06.00 k0 | 000.0KKI| DOOD KY | 00.00 MO
10 kHz 0000 ©) 00,06 ki? 000 ‚ЭКО 0000 ко) | 00.00 MO
(20 Hz | 0900 м) 7 99.000 | 000,00 | 00002 "| 00.00 KA
Rs kHz | 0606 m2 | 00.00) | BUOLOLE | 000012 | OU.VOKD
ОКН: | 000m) | 00000) | 0.08 | 06000) | 0v.00k!)
Note: 0000uH indicates a range of 0001uH tol1999uH { and similarly for F and £2).
Model 4262A
3-11. INITIAL DISPLAY TEST.
3-12. The Model 4262A automatically performs a
front panel LED display test for a few seconds
after instrument is tuned on (after LINE button is
depressed). The display test sequence is:
1. All front panel indicator lamps, except nu-
meric segments and multiplier indicator
lamps will illuminate. (SRQ, LISTEN, TALK
and REMOTE lamps illuminate only when
HP-IB option is installed).
2. Front panel pushbutton LED’s and indicator
lamps indicate that automatic initial settings
(see Paragraph 3-13 which follows) have been
set. Simultaneously, the LCR DISPLAY and
DQ DISPLAY readouts are tested. AI! nu-
тенис displays show figures of 8 (HB) and
multiplier indicators (p nu m k M) light in
turn.
3. Range indicator lamps step from right (upper
range) to left (lower range). When steps 1, 2
and 3 have been completed, the trigger lamp
begins to flash. Figures on numeric displays
change to meaningful numbers showing that
the 4262A is ready to take a measurement.
3-13. INITIAL CONTROL SETTINGS.
3-14. One of the sophisticated features of the
4262A is its automatic initial control setting func-
tion. After the instrument is turned on, the front
panel control functions are automatically set as
follows:
SELFTEST. .............. OFF
CIRCUITMODE......... AUTO
FUNCTION. ............. 4 С
LCRRANGE ........... AUTO
LOSS... iii ieee ian D
DQRANGE ............ AUTO
TEST SIGNAL ........... 1kHz
TRIGGER. ............... INT
As these initial settings provide the general capa-
citance measurement conditions applicable to a
broad range of capacitance measurements, a capa-
citance can be usualiy measured by merely con-
necting the sample to the UNKNOWN terminals.
Inductance or resistance can be measured by press-
ing the L FUNCTION or R/ESR FUNCTION
buttons, as appropriate. When a different meas-
urement is to be attempted, press appropriate
push buttons and select desired functions.
Section III
Paragraphs 3-11 to 3-18
3-15. D/O MEASUREMENT.
3-16. The Model 4262A makes a loss measure-
ment along with capacitance or inductance meas-
urements on each measurement cycle. The meas-
ured loss factor is displayed in the form of the
dissipation (D) or quality (Q) factor of the sample.
The D or Q function is pushbutton selectable in
both L and C measurements. D and @ measure-
ment ranges are:
001 to 1,999
0.01 to 19.9
‚050 to 1.996
0.05 to 19.61
00.1 to 166.7
001 to 1000
D: 2 ranges
Q: 4 ranges
The D range, appropriate to the value of the
sample is automatically selected. Alternately, a
manual D range control is pushbutton selectabie.
Quality factor (Q) is calculated as a reciprocal
dissipation number from the measured D value.
Hence, the Q readout display will skip some
numbers when low dissipation samples are meas-
ured. For example, when the dissipation measured
is .U10, the quality factor display is 100. When
dissipation is .009, the quality factor reading is 111
(Q readings of 101 to 110 are not obtained). On
the high D measurement range, the readout is
displayed in 3 digits.
3-17. ALCR MEASUREMENT.
3-18. When many components of similar value
are to be tested, it is sometimes more practicable
to measure the difference between the value of the
sample and a predetermined reference value. The
ALCR function permits repetitive calculation of
the difference between the reference and each in-
dividual sample and to display the result on the
LCR DISPLAY. When the ALCRK FUNCTION
button is pressed, the inductance, capacitance, or
resistance value of the sample is stored in an
internal memory. The 4202A will now display the
difference between the stored value and the meas-
ured value of a sample connected to UNKNOWN.
The LCR RANGE is automatically held in
MANUAL for the duration of ALCR measurements
(if another pushbutton is inadvertently pressed,
the ALCR measurement function will be reset and
will require reactivating).
Section III Model 4262A
Figure 3-3
Accessory Model Characteristics
16061 A Test Fixture This fixture facilitates easy measurement of general
Five terminal construction test fixture.
type components with axial or vertical leads.
To install fixture, disconnect shorting bars between
high terminals and between low terminals. Insert fix-
ture screws to firmly attach fixture to instrument.
Two kinds of inserts are included (for components
with either axial or vertical leads).
DUT range (at 1kHz)
pr nF uF
uH mH H
© 10 100 k2 10 100 MQ 10 100
R
16062A Test Leads
Test Leads for four terminal measurement
(does not contain guard conductor).
The 16062A is especially useful when measuring iow
impedances. DUT values measurable with the 160024
are diagrammed below. If the measuring sample is
more than approx. 300uF at 1kHz or less than approx.
100uH at 1kHz, it is recommended that the respective
potential leads and current leads be twisted together.
Measurable DUT ranges (at 1kHz)
pF nr uF
uH mH H
Q 10 100 КО 10 100 МО 10 100
C
L
R
16063 A Test Leads
Coaxial test leads with guard conductor
for three terminal measurement.
The 16063A is particularly useful when measuring high
impedances. DUT values measurable with the 16063A
are diagrammed below. This test lead set is not in-
tended to be used for the accurate measurement of
small capacitances (less than approx. 100pF) due to
the residual capacitance of the leads.
Measurable DUT ranges (at 1kHz)
pF nF uF
uH mH H
Q 10 100 ko 10 100 MN 10 100
C
L
R
Figure 3-3. Test Fixture and Leads.
Model 4262A
3-19. D/Q Blanking Function
(Switch selectable function inside cabinet).
3-20. The D/Q blanking function permits deac-
tivating the D/Q measurement as desired. If op-
erator has no need of D/Q measurement data, and
alternatively desires to make higher speed LCR
measurements, the switch for this function may be
set. When the D/Q function is deactivated, meas-
urement time is shortened to approximately 220 to
250 milliseconds (at 120Hz) and to 80 to 110
milliseconds (at 1kHz and 10kHz) as compared to
standard measuring times {which includes a D/Q
measurement). The D/Q deactivating switch is
located on the A23 board assembly. To select this
function, change setting of the switch as follows:
a. Remove top cover.
b. Take out A23 board (red and orange colored
extractors).
c. The selection switch is mounted near left
edge of the A23 board.
d. Change position of the switch as illustrated
beiow.
e. Reinstall the A23 board in its normal position,
f. Replace top cover.
normal D/Q blanking
HPIB | E...) - HPIB | eu J-
CMP lo EN)» CMP |o En
BCD |” M7» BCD |” Je
LCR | ME) + LCR | LIN =
3-21. General Component Measurement,
3.22. Figure 3-7 shows the operating procedures
for measuring an L, C or R (inductance, capaci-
tance or resistance) circuit component. Almost ali
discrete circuit components (inductors, capacitors
or resistors )Jexcept for components having special
shapes or dimensions can be measured with this
setup, Special components may be measured by
using Test Leads 16062A or 16063A or by
specially designed user built fixtures instead of
16061 A Test Fixture.
Section Iii
Paragraphs 3-19 to 3-29
3-23. Semiconductor Device Measurement.
3-24. The procedures for using the 4262A semi-
conductor device measurement capabilities are des-
cribed in Figure 3-8. For example, the junction
(interterminal) capacitance of diodes, collector
output capacitance of transistors, etc., can easily
and accurately be measured (with and without dc
bias).
3.25. External DC Bias.
3-26. A special biasing circuit using extemal voit
age or current bias, as needed for capacitor or in-
ductor measurements, is illustrated in Figure 3-9.
The figure shows sample circuitry appropriate to
4262A applications. Biasing circuits must avoid
permitting dc current to flow into the 4262A as de
current increases the measurement error and
the excess current sometimes may cause damage to
the instrument. When applying a dc voltage to
capacitors, be sure applied voltage does not exceed
maximum working voltage and that you are observ-
ing polarity of capacitor. Note that the external
bias voltage is present at Hcur and Hror terminals.
3-27. Bias Voltage Settling Time. When a meas-
urement with dc bias voltage superposed is per-
formed, it takes some time for voltage across
sample to reach a certain percentage of applied
(desired) voltage. Figure 3-9 shows time for de
bias voltage to reach more than 99% of applied
voltage and for 4262A to display a stable value. If
the bias voltage across sample is not given suffi-
cient time to settie, the displayed value may
fluctuate or O-F may be displayed. Read measured
value after display settles.
3-28. External Triggering.
3-29. For triggering the 4262A externally, connect
an external triggering device to the rear panel EXT
TRIGGER connector (BNC type) and press EXT
TRIGGER button. The 4262A can be triggered by
a TTL level signal that changes from low (OV) to
high level (+5V). Triggering can be also done by
alternately shorting and opening the center con-
ductor of the EXT TRIGGER connector to ground
(chassis).
Note
The center conductor of the EXT
TRIGGER connector is normally at
high level (no input).
3-30. TERMINAL CONFIGURATION.
3-31. Connection of DUT, The 4262A Unknown
terminals consists of five binding post (type) con-
nectors: Hcur, Hror, Lcur, Lror and GUARD,
By connecting the stationary shorting straps to
appropriate terminals, the UNKNOWN terminals
can be adopted for the desired measurement ter-
minal configuration: the two, three, four or five
terminal method,
For measurements of samples having a medium
order of impedance (100 to 10k), the convenient
two terminal methodis suited to measurement re-
quirements for good accuracy as well as for ease
in connecting the sample. When converting to two
terminals, shorting straps are attached to the
UNKNOWN Hcur and Hreor terminals, and LCUR
and Lror terminals, respectively.
High impedance samples (greater than 1k) --
~ which includes low capacitance, high inductance
and high resistance -- should be measured by the
three terminal method to eliminate the effects of
stray capacitances on the measurements, For
this purpose, the guard conductor of the sample is
connected to the instrument GUARD terminal,
in the measurement of low impedance samples
(less than 1k9), efforts should be made to elimi~
nate the effects of contact resistance, lead resist-
ance, residual inductance and other residual
parameters in the measuring apparatus. Four
terminal configuration measurements allow stable,
accurate measurement of high capacitance, low
inductance and low resistance samples at mini-
mum incremental errors in the measurement of
low impedance samples. In the four terminal
method, the shorting straps are disconnected
to separate potential leads from current leads.
Thereby, the characteristics of the sample can be
precisely determined by the instrument irrespec-
tive of the various residual parameters present in
the measuring signal current path, To ensure the
best accuracy, the potential leads should be con-
nected near to the sample.
The five terminal method, which adds the guard
conductor to the four terminal configuration, ex-
pands the applicable measurement range into the
higher impedance regions. Thus, this method
covers a broad range of measurements from low
to high impedance samples at the measuring fre-
quency of the 4262A.
When test fixtures and test leads used have a
shielding conductor and are designed to consider
residual impedance, the measurement limitations
described above for the individual terminal con-
figurations can vary to some extent depending on
the particular characteristics of the fixture and
connections, Three accessories, the 160614 Test
Fixture, the 16062A Test Leads, and the 16063A
Test Leads are available, The characteristics of
these accessories and applicable measurement
ranges are outlined in Figure 3-3. These acces-
sories make it easy to construct the desired ter-
minal configuration,
3-10
IMPORTANT |
FOR CERTAIN TERMINAL MEAS-
UREMENT CONFIGURATIONS, THE
Hcur TERMINAL MUST BE CON-
NECTED TO Hror TERMINAL AND
THE Lcur TERMINAL CONNECTED
TO THE Lror TERMINAL, OTHER-
WISE, THE DISPLAYS WILL HAVE
NO MEANING AND THE LIFE OF
THE RELAYS USED IN THE INSTRU-
MENT WILL SOMETIMES BE SHORT.
ENED.
Note
The 4262A can not measure a sample
which has One lead connected to earth
(grounded).
3-32. OFFSET ADJUSTMENT.
3-33. Since test fixtures and test leads have
different inherent stray capacitances and residual
inductances, the measured value obtained with
respect to the same sample may possibly differ
depending on the test fixture (leads) used. These
residual factors can be read from the 4262A dis-
play by properly terminating (short or open) the
measurement terminals of the test jig. The front
panel C ZERO ADJ and L ZERO ADJ controls
permit compensation for these residual factors
and can eliminate measurement errors due to the
test jig, The capacitance or inductance readout
can be set to zero for the particular test jig used
with the instrument. In capacitance and induct-
ance measurements, an incomplete offset adjust-
ment causes two types errors:
i} Deviation from zero counts.
When a small capacity or a small inductance
is measured, the measured capacitance
(inductance) value becomes the sum of the
capacitance (inductance) of sample and the
siray capacitance (residual inductance) of
test jig. The effects of the residual factors
are:
Cm = Cx + Cst
Lm= Lx + Lres
Where, subscripts are
m: measured value.
X! value of sample,
st: stray capacitance.
res: residual inductance.
Both Cst and Lres cause the same measure-
ment error and are independent of sample
value.
2) Influence on high capacitance and high in-
ductance measurements,
When a high inductance {a high capacitance)
is measured, the residual factors in the test
jig also contribute a measurement error,
The affect of stray capacitance or residual
inductance on measurement parameters are:
Stray capacitance -—e Offsets high inductance
measurements.
Residual inductance — Offsets high capacitance
measurements,
These measurement errors increase in
proportional to the square of the test signal
frequency. The effects of the residual
factors can be expressed as follows:
Lx
Lm = re LxCst
Lm - Lx
or ( La
w2LxCst)
In a 10kHz measurement, for the measure-
ment error to be less than 0.1%, the pro-
duct of Cx and Lres (Lx and Cst) should be
less than 0.25 x 10-12, The relationship
between the residual factors of the test jig
and measurement accuracies are graphically
shown in Figure 3-4.
The 4262 A ZERO ADJ controls cover the following
capacitance and inductance offset adjustment
ranges:
C ZERO ADJ: up to 10рЕ
_ Cx )
ME Trees LEEROADE wiodui
Cm - Cx — An offset adjustment should always be performed
or ( Cm: w2CxLres) before measurements are taken.
NON Test Signal ; 'OKHz
N
Ne =
lo NINH
N Ne
N N
е 9 x ex
E 5 N Jo N
= % N Ce AN
{5 {> à
< o Ne: 5
o o o N
© N N
NDS
9.1 | X x
N
0.01 O. LH
Residual Inductance
0.1 | IOpF
Stray Capacitance
Figure 3-4, Measurement Error due to Misadjusted ZERO ADJ Controls,
3-11
Section II
Figure 3-4
Model 4262A
Measurement Parameter Conversions
Parameter values for a component measured in a
parallel equivalent circuit and that measured in
series equivalent circuit are different from each
other. For example, the parallel capacitance of a
given component is not equal to the series capa-
citance of that component. Figure A shows the
relationships between parallel and series para-
meters for various values of D. Applicable dia-
grams and equations are given in the chart. For
example, a parallel capacitance (Cp) of 1000pF
with a dissipation factor of 0.5, is equivalent to
à series capacitance (Cs) value of 1250pF at
1kHz. As shown in Figure A, inductance or capa-
citance values for parallel and series equivalents
are almost identical when the dissipation factor
is less than 0.01. The letter D in Figure A re-
presents dissipation factor and is calculated by
the equations presented in Table À for each cir-
cuit mode. The dissipation factor of a com-
ponent always has the same dissipation factor at
a given frequency for both paralle! equivalent
and series equivalent circuits.
Note
Dissipation factors displayed when
CIRCUIT MODE is switched between
PRL and SER may exhibit slight dif-
ferences due to the measurement ac-
curacy ofthe 4262A,
The reciprocal of the dissipation factor (D) is
quality factor (Q) and D is often represented as
tan & which is the tangent of the dissipation
angle (8). Figure 3-6 is a graphical presentation
of the equations in Table À. For example, a
series inductance of 1000uH which has a dissipa-
tion factor of 0.5 at 1kHz has a series resistance
of 3.14 ohms,
Table A. Dissipation Factor Equations.
Circuit Mode Dissipation Factor Conversion Lo other modes
Cr
‚== . „u DE
Cp mode LF D = grime о’ Cs = {1 « D2)Cp, Re = Rp
р
Cz Rs t 1 1 7
Cs mode wend je D= 2xfCsHs (= © Cp = TB Cs, Rp = = Hs
2
= Zxflp = - = a = :
Lp mode Tok D o { a } Ls Тир? Lp, Rs Te Rp
сов Rs ] 1
— LI TT —] _— = + .
Ls mode a D = ZriL& {= Q } Lp = {Е + D2) Ls, Rp = LE Rs
=f: Test signal frequency.
tu IF}
Lp IM]
tp {Е}
La (НЕ
ю” 195" ¡AZ
Where n stands for 4 free integer,
FigureA. Relationships between Parallel and Series Parameters.
3-12
Figure 3-5. Conversion Between Parallel and Series Equivalents.
=u
e
=
о ©
" +
58
D
N
Model 4262A
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Series Inductance - Series Resistance
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x "E oy . x
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at LY * LA ow o y o *
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he > h > RY
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Parallel Inductance - Parallel Resistance
(B)
(A)
1
Ca As
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+ |"
NN
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x %
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LES
307
Cs{F}
Cp{F}
Series Capacitance - Series Resistance
Parallel Capacitance - Parallel Resistance
(D)
(C)
When n represents a free integer.
To obtain the graph for 10kHz test frequency, add 1 ton
on resistance scales.
Figure 3-6. Relationship of Dissipation to Series and Parallel Resistance.
3-13
Section II
Table 3-3
Table 3-3. Annunciation Display Meanings.
Model 4262A
DISPLAY
Indicated Condition
Action
DQ
FUNCTION has been inappro-
priately set.
Change 4262A FUNCTION to
Li, C or R suitable for the
sample being measured.
Measured L or C value exceeds
1999 counts. DQ display indicates
that DQ measurement has been
omitted.
Measured R value exceeds 1999
counts.
Set 4262A to:
CIRCUIT MODE: AUTO
LCR RANGE: AUTO
Try changing TEST SIGNAL
to 120, 1k or 10kHz.
(overflowed)
Measured D/Q value exceeds the
upper range limit (1999 counts).
Accuracy of LCR readings may
not be within specifications.
Set 4262A DQ RANGE to
AUTO.
Try changing TEST SIGNAL
to 120, 1k or 10kHz.
CIRCUIT MODE setting is not
suitable for the sample being
measured.
Measured L, C or R value is ex-
tremely large or small compared
with the selected range.
Set 4262A to:
CIRCUIT MODE: AUTO
LCR RANGE: AUTO
Try changing TEST SIGNAL
to 120, 1k or 10kHz.
(less than E
80 counts)
When Measured L or C value is less
than 80 counts, DQ measurement
is omitted.
Set 4262A LCR RANGE to
AUTO. Try changing TEST
SIGNAL to 120, 1k or 10kHz.
reading)
In ALCR measurement, the differ-
ence between the preset value and
the measured value of the sample
exceeds -999 counts.
In ALCR measurement, the cal-
culated difference exceeds -999
counts. In addition, the value of
measured sample is less than 80
counts.
Minus (-) is displayed.
Minus display sometimes occurs
when sample having a value around
zero is measured.
Zero count display is meaning-
ful when minus (-) display
repeatedly turns on and off.
Sometimes a minus display occurs
when a capacitor (or inductor) is
measured in L (or C) FUNCTION.
Change to appropriate
FUNCTION.
Offset adjustment signal applied is
too great (causes minus display).
Readjust offset signal for
proper magnitude.
Model 4262A Section III
Figure 3-6
MEASUREMENT PROCEDURE FOR GENERAL COMPONENTS
DC POWER SUPPLY
Nr Of meme
1. Remove shorting bar connections between high terminals and between low terminals (all
terminals are now isolated from each other). Connect 16061 A Test Fixture to 4262A
UNKNOWN terminals.
Note
User constructed test fixture may also be
connected. Guard terminal is sometimes used
in small capacitance measurements.
2. Depress LINE button to turn instrument on. An initial display test is automatically per-
formed before measurement begins.
3. Check that 4262A trigger lamp begins to flash. The 4262A control functions are auto-
matically set as follows (automatic initial settings):
DC BIAS. 2240404 40 0 a a 0 0 a 6 0104 aa 206 OFF
SELF TEST. 10224044 4 804 4440 a 4 a 040 000 6 OFF
CIRCUIT MODE. ....02240 008000 0 a 0000» AUTO
FUNCTION. . 1422 4 4 40 10 0 4 4 4 0 4 0 4580210000 C
LCR RANGE .. iii iii 0 420040 AUTO
LOSS. 1144240 4 60 48 0 4 44 8 8 a 0 4 8 84 83 0 4 se 40 6 D
DQ RANGE 0122004 0 00008 00 80 ua 000 AUTO
TEST SIGNAL . 1814150080 5 a 44 400 eu 040 ikHz
TRIGGER. 0202444400 44 00 0 4 0 4 0 80 a 8040 INT
Note
To check fundamental operating conditions of
the instrument, perform SELF TEST (refer to
Paragraph 3-5 for SELF TEST details). Press
SELF TEST button again to release the function.
4. Rotate C ZERO ADJ control until capacitance readout is 000 counts on LCR DISPLAY
(minus sign should not appear).
5. Connect a shorting lead to Test Fixture to short-circuit the Unknown terminals to zero
ohms (zero microhenries).
6. Press L FUNCTION button.
Figure 3-7. General Component Measurements (Sheet 1 of 3).
3-15
Section IN Model 42624
Figure 3-6
7. Rotate I. ZERO ADJ control until inductance readout is 000 counts on LCR DISPLAY,
Note
To achieve more critical zero adjustments,
when 10kHz test signal frequency is used, per-
form the capacitance and inductance zero off-
set adjustments (steps 4, 5, 6 and 7) at 10kHz.
8. Remove shorting lead from 16061A.
9. Select desired FUNCTION, either L, C or R/ESR.
10. Connect sample to be measured (1, C or R) to Test Fixture.
11. Model 4262A will automatically display value of unknown,
Note
If O-F, U-CL, minus (-) or blank display occurs,
see Table 3-3 for solution. Measured values for
semiconductor devices are sometimes unreliable
when TEST SIGNAL LOW LEVEL pushbutton
is in its normal (1V) state (button lamp is not
lit). In these instances, follow Figure 3-8 for
semiconductor device measurement.
Note
If manual triggering is required, press HOLD/
MANUAL button, Each time the button is
pressed, the instrument is triggered.
12. If internal DC bias is required, set DC BIAS switch to 1.5V, 2.2Y or 6V: If not, OFF
position should be selected.
Note
DC bias application may only be used for capa-
citance measurements.
CAUTION
POSITIVE POLE OF ELECTROLYTIC CAPA-
CITOR MUST BE CONNECTED TO HIGH
TERMINALS AS PLUS BIAS VOLTAGE 1S
APPLIED TO HIGH TERMINALS WITH RE-
SPECT TO LOW TERMINALS.
Note
An external bias voltage up to +40V may be
applied to EXT DC BIAS rear panel connector.
Connect DC power supply to EXT DC BIAS
connector. Set DC BIAS switch to EXT.
3-16
Model 4262A
Section II]
Figure 3-6
CAUTION
EXTERNAL DC BIAS AT EXT BIAS CON-
NECTOR MUST NEVER EXCEED +40V.
13. Read measured value on display.
Note
It is usually recommended that the LCR RANGE
be set to MANUAL and to hoid the range when
measuring multiple samples having almost the
same value. Range hold operation will somewhat
shorten measurement time.
Note
Series resistance of electrolytic capacitors, in-
ductors or transformers can be measured in series
R/ESR measurement mode. In these cases, the
number of digits is sometimes reduced. On the
other hand, resistance can, of course, be indirectly
measured with the C/L FUNCTION and cal-
culated from one of the following equations:
Rs = D/wCs (Cs-D measurement)
Rs = w Ls- D (Ls-D measurement)
Rs = o Lp — 5 (Lp-D measurement)
The above relationships are graphically shown
in Figure 3-6.
CAUTION
DO NOT CONNECT A CHARGED CAPACITOR
(EXCEEDING 40V) DIRECTLY TO THE UNKNOWN
TERMINALS AS A DUT.
CAUTION
NEVER APPLY A DC VOLTAGE DIRECTLY
BETWEEN THE UNKNOWN H AND LL TERMINALS
WITHOUT PROPER PROTECTION AGAINST A
POSSIBLE HARMFUL CURRENT. DC VOLTAGE
MUST NOT BE APPLIED TO THE L TERMINAL
WITH RESPECT TO GROUND.
Figure 3-7. General Component Measurements (Sheet 3 of 3).
3-17
Section III Model 4262A
Figure 3-7
Junction Capacitance Measurement
TO DC HAS Conmactor
BL POWER SUPPLY
AN
O Or
Setup -
The figure above is a typical test setup used for measuring base~collector junction capa-
citance (Cob) of an NPN transistor. For this measurement, test leads or fixture may be
user designed. If external DC bias is not necessary, arrangement and procedures associated
with this function may be deleted from setup.
Procedure -
1. Press LINE button to turn instrument on. After the initial display test, trigger lamp
will begin to flash and the 4262A functions are automatically set as follows:
SELF TEST. ...... oii ‚OFF
CIRCUITMODE. .......... city AUTO
FUNCTION. . .... iii eee C
LCR RANGE .......reesecrroreecvveo AUTO
LOSS. ....1200444 404046 0 0e 5 aa 00 000 0000 4 D
DQ RANGE 042404500408 0 00800000 AUTO
TEST SIGNAL .....051 605800000600 0 00 1kHz
TRIGGER. 44004004 004 e 4 a 0e ae a 000 0 INT
2. Press TEST SIGNAL LOW LEVEL and PRL CIRCUIT MODE buttons. The test signal
level is now 50mV and the parallel equivalent circuit mode is selected.
Note
A semiconductor junction capacitance meas-
urement must be made with a low level test
signal. If desired, TEST SIGNAL fequency may
be set to 10kHz.
3. Adjust C ZERO ADJ control for zero counts on LCR DISPLAY.
Note
If necessary, apply DC bias voltage internally
or externally at rear panel EXT DC BIAS con-
nector. External DC bias source should be
stable with low noise. Set DC BIAS switch in
EXT position during application of external DC
bias.
Figure 3-8. Semiconductor Device Measurement (Sheet 1 of 2).
3-18
Model 4262A Section III
Figure 3-7
CAUTION
NEVER APPLY AN EXTERNAL DC BIAS
OVER +40V.
4, Connect Semiconductor device to test lead or to fixture. To obtain reliable meas-
urement results, observe the following:
Note
a. It is impossible to measure junction capaci-
tance when bias current flows through sample.
b. If lead length of device allows, it is recom-
mended that the device be connected directly
to UNKNOWN terminals.
Read displayed values. Loss factor of the sample will be simultaneously displayed
on DQ DISPLAY, O o
Note
When using manual trigger, press HOLD/MAN-
UAL button. Each time the button is pressed,
the instrument is triggered. When measuring
multiple samples whose values are about the
same, itis recommended that the LCR RANGE
be set to MANUAL and that the range be held.
Parameter Measured Connections to 42624
Base-collector junction
capacitance (Cob)-
Emitter current = 0
Base- collector junction x“ {+ Bios) >
capacitance (Cre)- ^ (+ Blas)
Common emitter Low
HOOK
GUARD роль
GUARD
i High High
FET gate capacitance x- 1 ae) High oS Qpen
#
Low Low Low
5 5 <
(+ Bias}
Low Open
High High
trBias) {+Bias}
5 Open 5 Low
Diode junction capacitance dE
Note: Hot carrier diodes and Highs * Low Low High
germanium diodes oh Oo + Bigas)
: Note: No bics should
sometimes cannot ba applied.
be measured.
Figure 3-8. Semiconductor Device Measurement (Sheet 2 of 2).
Section IT
Figure 3-8
Model 4262A
External DC Voltage Bias Circuits (40V< , < 200V)
1. Connect external dc bias source as shown in diagram.
CAUTION
DO NOT APPLY DC VOLTAGE EXCEEDING
200VOLTS OR 4262A CIRCUITRY WILL BE
DAMAGED.
DC POWER SUPPLY
|
|
8
++
‘7
! gd 3
с
4
!
i o 1°
§
al E й
ES “cn. -
El A
ce je! A Я
: ES 200V ma RI ae e
«Oo ;
On
E
aio
e& a
al: a
ie
J
“O11
Ex | Unknown cduacitor
Note
+E voltage is applied to Cx in figure. -E voltage
can be applied to Cx in this figure. In the above
arrangement, the polarity of Cx and C1 must
be taken into consideration.
CATUION
NEVER SHORT BETWEEN Hror AND LOW
TERMINALS WHEN R1 IS SMALLER THAN
lk2. MAKE SURE THAT UNKNOWN CAPA-
CITOR IS NOT DEFECTIVE BEFORE CON-
NECTING TO INSTURMENT.
TO AVOID HARMFUL SURGE CURRENT
WHICH MAY FLOW THROUGH INTERNAL
CIRCUITRY WHEN A HIGH VOLTAGE DC
BIAS IS SUDDENLY APPLIED, IT IS RECOM-
MENDED THAT DC BIAS BE GRADUALLY
INCREASED FROM A LOWER VOLTAGE.
Note
Ripple or noise of external dc bias source should
be as low as possible. The low frequency noise
of bias source should be less than 1mVrms for
a TEST SIGNAL level of 50mV (LOW LEVEL)
and 30mVrms for 1V.
Figure 3-9. External DC Bias Circuit (Sheet 1 of 3).
3-20
Model 4262A Section 1
igure J-
2. Minimum values for both C1 (de blocking capacitor) and R1 are given in table below:
Note
Insulation resistance for Cx must be greater
than a certain minimum value, Refer to Table
3-4 for unusual operating indications,
Ran
(at 120Hz) | 1000pF | 10.00nF | 100.0nF | 1000nF | 10.00uF
Minimum | 001, F | OJuF | WWF | 10uF | 10.00F
Minimum | 300ke | 100k0 | 10kQ 1ke | 1000
In 1kHz(10kHz) measurement, multiply both range value and value
of C1 by 1/10 (1/100). If the calculated value of C1 is less than
0.01uF, use 0.01uF capacitor.
Note
DC withstand voltage for C1 capacitor must be
greater than dc applied voltage E. Also observe
polarity of capacitor C1 with respect to applied
voltage,
3. Set 4262A controls as follows:
SELF TEST... aie ies OFF
FUNCTION. .....e.-.._odavreroacorrerdeca C
CIRCUITMODE. ...... iia. PRL
Othercontrols. ................... any setting
4. Read displayed value after allowing time for bias voltage to settle. Typical settling
times are:
i20Hz: 6 to 7 seconds.
1kHz/10kHz: 2 to 3 seconds.
BIAS VOLTAGE SETTLING TIME
8
3
че o
OQ Oo
Settling Time In Seconds
CA
y” 10, 1004 10004 Om
Capacitance Reading (F)
If Ci and R1 which are larger than those given in table on
above are connected, longer settling times are necessary.
Figure 3-9. External DC Bias Circuit (Sheet 2 of 3).
3-21
Section II
Моде! 4262 А
Figure 3-8
Using Current Bias (for inductors).
1. Connect dc power supply as shown below:
Note
DC power supply should be floated from ground.
If cable between low terminals of 4262A and DC AMMETER
power supply is relatively long, it should be
shielded cable. The outer conductor is con-
nected to GUARD terminal. an
9
TO DC BAS Connector
DC POWER SUPPLY
Ci aE À NU.
=
in —
+
i 5
| LX ix. Unknown inductor + O
TA AHH dile dd бин ин Мен не с кн ск = сн кн = ле — мне A O кн == ск= Sl Отит BAe dH lili las be AA ls e TA — — вже mime WARS БРА AM A
|
Г I —- nl "MEA + = =. pm a TE
| ©) © {0 e DELS SEO
EE E
2. Set 4262A controls as follows:
DC BIAS.. 11020240 4 0 44 0 86 a a 83 40 448200 EXT
FUNCTION, 1244000 08 20 8 0 0 canes enon L
CIRCUITMODE. ................ PRL or SER
LCR RANGE ........ cinerea. MANUAL
Other controls. ......... _esaaeoro any settings
Note
First, determine appropriate range by connect-
ing sample with no de bias current applied.
Then hold the range.
3. Recommended inductance ranges and maximum bias currents are:
Range (at 120Hz) 1000 uH 10.60 mH | 160.0 mH | 1000 mH 10,00 H 100,0 H
CIRCUIT MODE SER PARA
Maximum Bias
Current 40m A I6MA 13mA 40mA 36m A 13mA
In LkHz(10kHz) measurement, multipiy range value by 1/10 (1/100),
CAUTION
DC BIAS OVER +40 VOLTS MUST NOT BE AP-
PLIED TO EXTERNAL DC BIAS INPUT CON-
NECTOR.
Figure 3-9. Extemal DC Bias Circuit (Sheet 3 of 3).
3-22
Model 4262A
Section IHM
Table 3-4
Table 3-4, Unusual Operating Indications (Sheet 1! of 4).
Indication:
Cause of trouble:
A, Same sample sometimes shows quite
different values between PRL and
SER CIRCUIT MODE measurements,
B. The decimal point moves and measure-
ment unit changes.
A and/or B may occur in the following cases:
Resistance of low loss inductor or
capacitor being measured in R FUNCTION,
Inductance of lossy inductor or capacitance
of lossy capacitor being measured in Lor
C FUNCTION,
Indication:
What to do:
A. Do not set CIRCUIT MODE to AUTO,
Set CIRCUIT MODE to a PRL or SER
setting that shows a valid display.
B. Set LCR RANGE to MANUAL.
Manually settle the instrument
on an appropriate range.
Cause of trouble:
The displayed value fluctuates on minimum
capacitance, maximum inductance or
maximum resistance ranges in either PRL
or SER circuit modes.
Here are some of the reasons why this
happens:
A. A large size sample is being measured,
B . A high voltage power line or similar
exists near the 42624,
C . The 4262A and sample are connected
together with relatively long,
non-shielded cable.
UNKNOWN
H SUR
EC HAS +
H POT
Metal Case
What to do:
1. Enclose sample in metal case.
Connect case electrically to 4262A
GUARD terminal as illustrated.
2. Use shielded cable for connection
between sample and the instrument.
Connect cable shield to GUARD,
3-23
Section Ш
Table 3-4
Model 4262A
Table 3-4. Unusual Operating Indications (Sheet 2 of 4}.
Indication:
Cause of trouble:
measurement error is excessive,
When measuring a low impedance (small
inductance, resistance or high capacitance), capacitance or resistance) of test leads
1. Excessive residual impedance (inductance,
in a two terminal measurement,
д. Mutual test lead induction between
current leads (Hcur and Lcuyr) and
potential leads (Hpor and Lpor).
Indication:
What to do:
Use test leads in four -terminal con-
figuration and measure.
Twist current leads (Hour And Lcyp) together.
Do the same with potential leads (Hpor and
Leor).
Additional error is presented as
wèLrCx X 100 (%) for C measurement,
where:
= anf
test frequency
residual inductance
unknown capacitance
©
£
Lr
Cx
Cause of trouble:
impedance {high inductance, small
capacitance) is measured,
Measurement error is excessive when high
Measurement Cause of error
High Inductance | Stray capacitance
between High and Low
leads.
Small Stray capacitance
Capacitance between High and Low
jeads.
What to do:
Use shielded cable for connection
between sample and 4262A UNKNOWN
terminals. Connect outer conductor
to GUARD terminal.
Adjust C ZERO ADJ control properly to
compensate for stray capacitance.
3-34
Model 4262A
Section HI
Table 3-4
Table 3.4. Unusual Operating Indications (Sheet 3 of 4}.
Indication:
Cause of trouble:
Excessive measurement error.
Measurement Allowable Stray
Frequency Capacitance Magnitude
120Hz 1008 Е
ikHz 1000р Е
10kHz 200pF
UNKNOWN
PO! MH CHR
Sample
Indication;
Cause À.
Effect of Low terminal capacitance with
respect to ground.
Sometimes the measurement can not be
performed when a relatively large capacitance
between Lpor terminal and ground exists.
Allowable magnitudes for stray capacitance
without additional error are given in figure at
left.
Cause B.
Effect of High terminal capacitance with
respect to ground. The stray capacitance
will reduce test signal level applied to the
sample measured during capacitance
measurement. This decrease in signal level
will not produce an additional error even
when measurement signal level is reduced to
a third of its nominal level, If is neccessary,
of course, that special care be taken to use
the proper test signal level when a device is
measured whose parameters may be affected
by the test signal level, Display fluctuations
may sometimes appear,
What to do:
Internal resistance of a battery can not be
measured.
1. Connect sample battery (observe polarity)
UNKNOWN
GUARD Lt Cun L POT MH Pot H cun
DL BIAS ~ DC BIAS +
Battery
4
2. Batteries up to 40V are measured under
3. If battery voltage exceeds 4V, set
4. Since the internal resistance of a battery
as illustrated.
no load conditions,
DC BIAS to EXT
is relatively low, use the four- terminal
measurement configuration.
3-25
Section II
Model 4262A
Table 3-4
Table 3-4. Unusual Operating Indications (Sheet 4 of 4),
Indication: Cause of trouble:
When a sample (for example, an iron core The measurement reading of sample
inductor) is measured in AUTO of CIRCUIT depends on the level of measurement
MODE, the instrument repeats range test signal applied.
selection and does not complete the meas-
urement depending upon level of test current
used,
What to do:
Set LCR RANGE to MANUAL,
Manually settle the instrument on
an appropriate range.
Indication:
When a capacitor is measured with dc bias
voltage applied, an abnormal display occurs,
There are limitations to the permissible
insulation resistance of a capacitor
measured with de bias, See table below,
MODE RANGE
kHz Cp 100. OpF 1000pF 10.00nF | 100.0nF 1000nF
Cs 100, OnF 10008 Е 10,00 Е 100, 0uF 1000 LF
Permissible
insulation SOMO JO00kO 300k? Ski? 30002
resistance (Ri)
Note
In 120Hz(10kHz) measurement, multiply range value by 10(1/10).
Ri given in above table is applicable for a dc bias of 40V, When the
bias voltage is less than 40V, Rı limit is RiVb/40 (2) where Ri is
value given in the table and Vb is applied dc bias voltage,
3-26
Model 4262A
3-40. OPTION OPERATION.
3-41. Operating instructions for Options 001,
004, and 101 are described in the following para-
graphs.
3-42. OPTION 001: BCD PARALLEL DATA
OUTPUT.
3-42. The 4262A Option 001 provides parallel
BCD outputs for LCR display, D/Q display and in-
formation for various control settings. These
outputs are fed to two 50 pin connectors on the
rear panei.
344. Output Data and Pin Assignment.
3-45. The 4262A Option 001 provides eight
. kinds of output data:
(1) FUNCTION and CIRCUIT MODE,
(2) Test Signal Frequency (LOW LEVEL or
normal is excluded).
(3) Annunciator: Normal, Overflow, Uncal,
(LCR and D/Q are not annunciated).
(4) Unit: p, n, 4, m, К, M, D, Q (judgement
whether capacitance, inductance or resis-
tance depends on output of FUNCTION
switch setting information).
(5) Decimal Point.
(6) Polarity.
(7) Displayed value,
(8) Other Input/Output Signals.
Section III
Paragraphs 3-40 to 3-48
The signal pin assignments for the 50 pin con-
nector are shown in Figure 3-40. When these
signals are fed to digital printer, the print-out is
given as a 10 digit decimal number.
346. Alternate Output of LCR and D/Q Data.
BCD outputs for LCR and D/Q data of 4262A
Option 001 can be alternately supplied through
one 50 pin BCD LCR DATA OUTPUT connector
on rear panel. This alternate output is enabled by
changing slide switch setting on printed circuit
board P/N 04262-66535. РС board 04262-66535 is
located nearest to the rear panel in the right hand
row of PC boards. Normal setting of the four
section slide switch for parallel output and the set-
ting for alternate output are illustrated below.
Normal
Parallel output; Alternate output:
._— 0 — P 40 — P
—
5 S
3-47. Output Timing.
3-48. Timing charts for parallel (simultaneous)
output and altemate output are shown in Figure
3-41.
3-27
Model 4262A
Note: Figure in circle indicates column number.
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Section II
Figure 3-40
Figure 3-40. Pin Assignments of Output Connector and Output Format.
NORMAL, printed number for DATA is 2000.
When annunciation is other than
** These are not displayed.
Ye
3-28
Model 4262A Section II
Figure 3-41
Parallel output:
EXTERNAL ENCODE « |
(from external device) qe | |
FLAG | —|.2msle- |
(to external device) | | ra |
INHIBIT | |
(from external device) | |
§
"Measurement Data transfer/storage
cycle cycle
Alternate output:
EXTERNAL ENCODE
(from external device) | | U
FLAG "it 2 ¡2mste- |
{to external device) | = a
INHIBIT | te
(from external device) | ol Г! Г? |
os J |
‘Measurement LCR data D /Q data -
cycie transfer/storage transfer/storage cycle
cycle
NOTE
Assert /INHIBIT white /FLAG is asserted, The BCD output will be maintained until
/INHIBIT goes HIGH.
Figure 3-41. Timing Chart of BCD Data Output.
3-29
Section III
Paragraphs 3-49 to 3-51
349. OPTION 004- COMPARATOR.
3-50. The 4262A Option 004 (shown in Figure
3-43) provides:
(a) HIGH and LOW limits setting for com-
parison of LCR and D/Q measured data.
(b) LED visual decision output lamps display
of results of HIGH and LOW limit com-
parisons,
(c) TTL outputs and relay outputs for HIGH,
IN, and LOW decision outputs.
3-51. Front Panel Features (Figure 3-42).
(1) LCR LIMIT Switch: Two four-digit
switches provide HIGH and LOW limit
values with which measured LCR value is
compared. Setting range is from 0000 to
1999.
(2) LCR Decision Output Lamp: Results of
comparison are indicated by LED lamps
as follows:
HIGH: (measured value > High limit)
IN: (Low limit $ measured value
< High limit)
LOW: (measured value < Low limit)
(3) LCR LIMIT CHECK Switch: While this
switch is depressed, HIGH and LOW limit
values set by LCR LIMIT switches (1) are
displayed in LCR and D/Q displays. During
this period, three LCR decision output
lamps are lit. Comparator must be en-
abled display limits.
Model 4262A
(4)
(5)
(6)
Figure 3-42. Front Panel Features
D/Q LIMIT CHECK Switch: While this
switch is depressed, HIGH and LOW limit
values set by D/Q LIMIT switches (6) are
displayed in LCR and D/Q displays. During
this period, three D/Q lamps of decision
outputs are lit.
D/Q Decision Output Lamp: Results of
comparison is indicated by LED lamps
as follows:
HIGH (measured value X High limit)
IN: (Low limit € measured value
< High limit)
LOW: (measured value < Low limit)
D/Q LIMIT Switch: Two four-digit
switches provide HIGH and LOW limit
values with which measured D/Q value is
compared. Setting range is from 0000 to
1999,
a
MT ные 2
° 1
309 OR gags
"TO aay
Te a a
a
Figure 3-43. Option 004: COMPARATOR.
3-30
Model 4262A
(7) COMPARATOR ENABLE Switch: This
switch enables the Option 004 to compare
measured data with HIGH and LOW limits
under a fixed range condition (LCR or D/Q
RANGE switch set to MANUAL). If LCR
RANGE switch or D/Q switch is set to
AUTO, depressing COMPARATOR EN-
ABLE switch changes LCR or D/Q RANGE
switch setting to MANUAL.
If AUTO key of LCR or D/Q RANGE
switch is depressed while COMPARATOR
ENABLE switch is ON, one measurement
cycle is done in AUTO ranging and the
range is fixed to that selected in this meas-
urement cycle,
3-52. LIMIT Setting Warning: If HIGH
LIMIT setting is lower than LOW LIMIT setting,
Section III
Paragraphs 3-52 and 3-53
Relay Contact Ratings
AC DC
Contact Resistance 100103 © 100m
Maximum Permissible 30V A 20W
Power
Maximum Permissible
Voltage 110V 30V
Maximum Permissible 0.3A LA
Current
Actuation Life > 10 million | > 1 million
Decision Output Data Format
HIGH and LOW lamps of decision output Relay output pins | TTL output pins
repeatedly turn ON and OFF to warn operator to Decisions Ten renier
. LC LCR LCR LCR
change LIMIT setting. 13 17 |14 18 |39 42115 19.116 20 Jar 48
3-53. DATA OUTPUT Connector Decision Output: HT с о о H L L
Decision outputs in TTL open collector signal and
in relay contact are supplied through COMPARA-
TOR OUTPUT connector on the rear panel. Signal IN о о S L L H
pin assighment is given in Figure 3-44,
WARNING ! LO o|s|o|bP|L
DO NOT APPLY AC LINE VOLT- S: Short O: Open
AGE TO RELAY OUTPUT CON- Referenced toc common (pin 38 or 42).
NECTOR PIN TO SWITCH LINE TTL Qutput sink current: 30mA max.
CURRENT. For suchrelay appli-
cations, remotely controi an ex-
ternal relay with relay output.
S 5 6 y
3 3 § EXT TRIG (Pin 46) pn |
e а AZ ; Measurement 1.2 muse
& Gé 22 COMPARATOR x /
5 ; © + , END FLAG (Pin 21) ov le]
< ECON = — |
cs Eto Ene kag FP
a ETESEGIO: Decision Qutput
366609539583 88
й
oA oe ooo “no
тов ов Zo ok Bow EB E > a
3 6 8 0g 8 7 z 52
fue
i x
> U
я 8 2 2
LOR COMMONR)
DE COMMONEIR }
EXT TRIG: External Trigger
T: TTL output
R: Relay output
Figure 3-44. Comparator Data Output Pin Locations,
3-31
Section}
Paragraphs 3-60 to 3-67
3-60. OPTION 101: HP-1B.
361. The 4262A Option 101 provides interface
capabilities in accordance with IEEE-STD-488-
1975 recommendations,
3-62. Connection to HP-IB Controller: The
4262A Option 101 can be connected to an HP-IB
Controller (HP calculator) via HP-IB digital bus
connector on the rear panel of the 4262A and the
bus connector of the Bus 1/O card installed in
calculator.
3-03. HP-IB Status Indicator: The four LED
lamps of the HP-IB Status Indicator (located below
the LCR display) show which HP-IB condition the
4262A is in:
SRQ: SRQ signal put on HP-IB lihe from
4262A. See paragraph 8-70 for details,
LISTEN: 42624 is set to listen. See paragraph
3-69 for details.
The 4262A is set to talk, See
paragraph 3-67 for details.
Remote: The 4262A is remotely controlled.
See paragraph 3-71 for details.
TALK:
3-64. LOCAL Switch: This switch disables re-
mote control and enables setting measurement
conditions by front panel controls {pushbutton
switches). REMOTE lamp of HP-IB status indicator
tums off when LOCAL switch is depressed.
(When Local Lock Out does not function),
3-65. HP-IB INTERFACE CAPABILITIES: The
4202A Opt 101 has the following eight bus inter-
face functions:
SH1: Source Handshake Capability.
АНТ: Acceptor Handshake Capability.
TH: Talker (the 4262A sends measurement
data to the bus).
1.4: Listener (the 4262A receives remote
control signals from the bus).
SR1: Service Request Capability.
RL1: Remote/Local Capability.
DC1: Device Clear Capability.
DT1: Device Trigger Capability.
3-66. Source and Acceptor Handshake:
SH1, AHI.
Three Bus handshake lines (DAV, NRFD and
NDAC) perform Source and/or Acceptor hand-
shake functions.
(1) DAY (Data Valid). DIO (Data Input Out-
put) line is available.
(2) NRFD (Not Ready For Data). Listener
preparation for receiving data from Talker
is not yet completed.
3-32
Model 4262A
(3) NDAC (Not Data Accepted). Listener has
not yet received data from Talker.
3-67. Talker Capability: T5.
When set to Talker by MTA (My Talk Address)
signal from controller, the 4262A sends measure.
ment data to the Bus in one of three types of out-
put formats:
Type A: Ordinary output format. Address
switch on the rear panel set to FMT A,
S FC F -NN.NNE-NN,SF N.NNN CRLF
{1} (2) (3) (4)
(516) (7 (8)
Type B: Output format used for Model 5150A
HP-IB Digital Recorder. Address switch on
the rear panel set to FMT B.
S FCF -NN.NNE-NN CRLF S F N,NNN CRLF
(1) (2) (3) (4) 8 (Ne (7 (8)
Type C: Output format used in resistance meas-
urement or LCR ONLY measurement when
no D/Q data is to be outputted. Selection
of this format is automatically done in
accordance with FUNCTION switch setting.
S FC F -NN.NNE-NN CRLF
1) 2) (3) (4) (8)
The numbered elements of output data are des-
cribed below:
(1) Status:
NL. 122602 a 000 Normal
О... .......... Overflow
| a 000 6 Uncal
Х........ LCRNA or DNA
(NA: Not Available)
(2) Function and Circuit Mode:
FUNCTION MEASURE- CIRCUIT
MENT MODE
CP С PRL
CS C SER
LP L PRL
LS L SER
RP R PRL
RS R/ESR SER
(3) Frequency:
A... .. 120Hz (100Hz)
B......... 1kHz
C........ 10kHz
Model 4262A
(4) LCR Data
(5) Data Delimiter
(6) Loss
D..... Dissipation Factor measurement
Q......., Quality Factor measurement
(7) DQ Data
(8) Data Terminator
3-68. Functions Related to Talker Capability.
EOI (End Or Identify): When multiple byte data
of Source Handshake has been sent, the
4262A provides EOI to the bus.
Talk Only Mode: When ADDRESS switch is set
to TALK ONLY “1” position, the 4202A
is set to Talker regardless of address code.
TALK
X—3 ONLY
+4 FMTB
1000001 |
ADDRESSABLE — es Al
ikÁ-—— ADDRESS
FMTA
Talk Address Disabled by Listen Address:
MTA (My Talk Address) is automatically
disabled when MLA (My Listen Address) is
set. MTA (My Talk Address) is otherwise
disabled by IFC (Interface Clear) signal,
OTA (Other Talk Address) signal or UTA
(Untalk Address) signal.
3-69. Listener Capability: 1.4.
To receive Remote Program signal or Addressed
Command signal, the 4262A is set to Listener by
an MLA (My Listen Address) signal from the bus.
(1) Remote Program signal: Remote program
codes for the 4262A are listed in Table
3-60,
(2) Addressed Command signal: When the
4262A receives command signals GET,
GTL, or SDC, it is set to Listener and con-
trolled by command signals, These
command signals are valid regardless of the
status (remote or local). |
GET (Group Execute Trigger): When the
4262A receives this command, it is trig-
gered regardless of front panel TRIG-
GER switch setting.
GTL (Go to Local). The 4262A is set to
LOCAL by this command to enable
front panel control.
Section III
Paragraphs 3-68 to 3-70
SDC (Selected Device Clear): When this
command is accepted, front panel con-
trols are set to initial conditions (the
same conditions that are automatically
set after turn-on of power switch).
Listen status is automatically disabled when MTA
(My Talk Address) is received. Listen status is
otherwise disabled by IFC (Interface Clear) signal
or ULA (Unlisten Address) signal.
3-70. Service Request Capability: SR1.
The 4262A sends an SRQ (Service Request) signal
whenever it is set in one of the six possible RQS
(Request Status) states. It does this by responding
to a serial poll of the controller by setting an STB
(Staus Byte) signal on the bus. The 7th bit of this
8 bit signal establishes whether or not a service
request exists. The remainder of the 8-bit signal
identifies the character of the SRQ.
г a a a ba b3 bz m
NOT USED T T DRDY
SYN ERR
PASS
FAIL |
FAI 2
FAIL 3
SRG YES/NO
SRQ (Service Request) is disabled when RQs
(Request Status) or STB (Status Byte) is set to
00000000 or when STB (Status Byte) signal
transfer is completed.
Request Statuses (RQS) of the 42624:
(1) DRDY (Data ReaDY): When the 4262A
completes a measurement cycle, this status
bit is set. This status is set without serial
polling if NOT DATA READY is set.
(2) SYN ERR (SYNtax ERRor): When the
4262A receives an erroneous Remote Pro-
gram Code which is not listed in Table
3-60, this status bit is set.
(3) PASS (Self Test Pass): When PASS is dis-
played in Self Test done by remote control,
this status bit is set.
(4) FAIL 1 (Self Test Fail 1): When FAIL 1 is
displayed in Self Test done by remote con-
trol, this status bit is set.
(5) FAIL 2 (Self Test Fail 2): When FAIL 2 is
displayed in Self Test done by remote con-
trol, this status bit is set.
(6) FAIL 3 (Self Test Fail 3): When FAIL 3 is
displayed in Self Test done by remote con-
trol, this status bit is set,
3-33
Section Ш
Table 3-60
3-34
Table 3-60. Remote Program Codes.
CONTROL Program Code
Function L F 1
С F2
R"ESR F 3
Cirenit Mode AUTO Cil
PRL C2
SER C3
Loss D Li
Q L 2
Frequency 120 Hz HI
| kHz H 2
10 КН? НЗ
Trigger INT T 1
EXT T 2
HOLD / MANUAL T 3
Self Test OFF S 0
ON Sil
ALCR OFF MO
ON Mi
Cp Low Level OFF Po
ON Pi
“Data Ready OFF Do
RQS Mode ON Di
(С) (1) (В)
LCR Range 100p 1004 1000m Ri
at 1 kHz 1000 1000 10 RZ
10n 10m 100 R 3
100 100 1000 R 4
1000 1000 10 k RO
10 10 100 k R6
100 100 1000 k R 7
1060 — 10M К 8
— AUTO — R 9
DQ Range (D) (©)
— 1000 №1
— 100.0 NZ
16, 00 10, 00 N 3
1.000 1.000 N 4
— AUTO — №5
* Data Ready RQS Mode is automatically disabled when Remote Status
is changed to Local Status.
Model 42624.
Model 4262A
Table 3-61. Remote Message Coding.
D D
| |
CLASS О O
8 7 6 5 4 3 71
DCL device clear UC % 6€ 061 01 00
GET group execute trigger AC X00 01 ¢ 00
GTL go to local AC X00 00 0 01
LLO local lock out UC X 00 10 6 001
ML A my listen address AD X00 !LL LULL
5 4 3 2 1
MTA my talk address AD X 10 TTTTT
5 4 3 21
OTA other talk address AD (OTA=TAGNMTA)
SDC “selected device clear AC X0 00 0 100
SPD serial poll disable uc X00 11 0 6 1
SPE serial poll enable UC X 0 6 1 1 0 60
SIB status byte ST S XS5SS5ES
UNL unlisten AD X 01111 1 1
UNT untalk AD X 10 tt 1 1 11
CLASS UC : Universal Command
AC : Addressed Command
AD . Address :
ST. Status Byte
Section III
Table 3-61
3-35
Section IHM
Paragraphs 3-71 to 3-75
3-71. Remote/Local Capability: RL1.
The 4262A goes to Remote Status only when it
accepts Listen address with REN (Remote Enable)
line in the Bus lines set to “1”, Remote status is
not obtained if REN line is set to “1” after Listen
address is received. Remote status is returned to
Local status when one of following conditions is
present:
(1) REN line is set to “0”,
(2) LOCAL switch on front panel is depressed.
(3) GTL (Go To Local) command is received.
Local Lock Out: LLO
Local Lock Out inhibits the function of LOCAL
switch. This LLO command is a universal
command and is valid when REN line is set to
“1”. LLO command is disabled when REN line
is set to “0”
3-72. Device Clear Capability: DC1.
The 4262A is set to initial conditions (the same
conditions that are automatically set after turn-on
of power switch), when it accepts DCL (Device
CLear) command-universal command—or SDC
(Selected Device Clear)--addressed command.
3-73. Device Trigger Capability: DT1.
The 4262A is triggered regardless of TRIGGER
switch setting when it accepts GET command—ad-
dress command.
3-74. ADDRESS Switch: ADDRESS switch on
the rear panel sets Listen/Talk address. Five section
or five bit switch provides 30 settings from 00000
to 11110.
AS A4 A3 A2 Al
0 0 0 0 Qe 0
l 1 1 1 6G + 30
3-75. Remote Message Coding: Interface Bus
Command signals for the 4262A are listed in Table
3-61.
3-36
Model 4262A
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