Service manual as a PDF-file here

Service manual as a PDF-file here

D i s t o r t i o n M e t e r

H M 8 0 2 7

Service-Manual

G e n e r a l i n f o r m a t i o n r e g a r d i n g t h e C E m a r k i n g

KONFORMITÄTSERKLÄRUNG

DECLARATION OF CONFORMITY

DECLARATION DE CONFORMITE

DECLARACIÓN DE CONFORMIDAD

Hersteller / Manufacturer / Fabricant / Fabricante:

HAMEG Instruments GmbH · Industriestraße 6 · D-63533 Mainhausen

Die HAMEG Instruments GmbH bescheinigt die Konformität für das Produkt

The HAMEG Instruments GmbH herewith declares conformity of the product

HAMEG Instruments GmbH déclare la conformite du produit

HAMEG Instruments GmbH certifi ca la conformidad para el producto

Bezeichnung:

Product name:

Klirrfaktor Messbrücke

Distortion Meter

Designation: Distorsiomètre

Descripción: Medidor de distorsión

Typ / Type / Type / Tipo: mit / with / avec / con:

HM8027

HM8001-2

Optionen / Options /

Options / Opciónes: – mit den folgenden Bestimmungen / with applicable regulations / avec les directives suivantes / con las siguientes directivas:

EMV Richtlinie 89/336/EWG ergänzt durch 91/263/EWG, 92/31/EWG

EMC Directive 89/336/EEC amended by 91/263/EWG, 92/31/EEC

Directive EMC 89/336/CEE amendée par 91/263/EWG, 92/31/CEE

Directiva EMC 89/336/CEE enmendada por 91/263/CEE, 92/31/CEE

Niederspannungsrichtlinie 73/23/EWG ergänzt durch 93/68/EWG

Low-Voltage Equipment Directive 73/23/EEC amended by 93/68/EEC

Directive des equipements basse tension 73/23/CEE amendée par 93/68/CEE

Directiva de equipos de baja tensión 73/23/CEE enmendada por 93/68/EWG

Angewendete harmonisierte Normen / Harmonized standards applied /

Normes harmonisées utilisées / Normas armonizadas utilizadas:

Sicherheit / Safety / Sécurité / Seguridad:

EN 61010-1: 1993 / IEC (CEI) 1010-1: 1990 A 1: 1992 / VDE 0411: 1994

Überspannungskategorie / Overvoltage category / Catégorie de surtension /

Categoría de sobretensión: II

Verschmutzungsgrad / Degree of pollution / Degré de pollution / Nivel de polución: 2

Elektromagnetische Verträglichkeit / Electromagnetic compatibility /

Compatibilité électromagnétique / Compatibilidad electromagnética:

EN 61326-1/A1: Störaussendung / Radiation / Emission: Tabelle / table / tableau 4; Klasse / Class / Classe / classe B.

Störfestigkeit / Immunity / Imunitee / inmunidad:

Tabelle / table / tableau / tabla A1.

EN 61000-3-2/A14: Oberschwingungsströme / Harmonic current emissions

/ Émissions de courant harmonique / emisión de corrientes armónicas:

Klasse / Class / Classe / clase D.

EN 61000-3-3: Spannungsschwankungen u. Flicker / Voltage fl uctuations and fl icker / Fluctuations de tension et du fl icker / fl uctuaciones de tensión y fl icker.

Datum / Date / Date / Fecha

22.07.2004 Unterschrift / Signature / Signatur / Signatura

General information regarding the CE marking

HAMEG instruments fulfi ll the regulations of the EMC directive. The conformity test made by HAMEG is based on the actual generic- and product standards. In cases where different limit values are applicable,

HAMEG applies the severer standard. For emission the limits for residential, commercial and light industry are applied. Regarding the immunity (susceptibility) the limits for industrial environment have been used.

The measuring- and data lines of the instrument have much infl uence on emmission and immunity and therefore on meeting the acceptance limits. For different applications the lines and/or cables used may be different. For measurement operation the following hints and conditions regarding emission and immunity should be observed:

1. Data cables

For the connection between instruments resp. their interfaces and external devices, (computer, printer etc.) suffi ciently screened cables must be used. Without a special instruction in the manual for a reduced cable length, the maximum cable length of a dataline must be less than

3 meters and not be used outside buildings. If an interface has several connectors only one connector must have a connection to a cable.

Basically interconnections must have a double screening. For IEEE-bus purposes the double screened cables HZ72S and HZ72L from HAMEG are suitable.

2. Signal cables

Basically test leads for signal interconnection between test point and instrument should be as short as possible. Without instruction in the manual for a shorter length, signal lines must be less than 3 meters and not be used outside buildings.

Signal lines must screened (coaxial cable - RG58/U). A proper ground connection is required. In combination with signal generators double screened cables (RG223/U, RG214/U) must be used.

3. Infl uence on measuring instruments.

Under the presence of strong high frequency electric or magnetic fi elds, even with careful setup of the measuring equipment an infl uence of such signals is unavoidable.

This will not cause damage or put the instrument out of operation. Small deviations of the measuring value (reading) exceeding the instruments specifi cations may result from such conditions in individual cases.

HAMEG Instruments GmbH

2

Subject to change without notice

C o n t e n t

Declaration of Conformity

General information regarding the CE-marking

Distortion meter HM8027

Specifi cations

Control elements

Operational check

Ajustment 7

Circuit and layout diagrams 8

6

6

4

5

2

2

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3

H M 8 0 2 7

D i s t o r t i o n M e t e r

H M 8 0 2 7

Mainframe HM8001-2

HZ32 Test cable

Frequency range 20 Hz to 20 kHz

Resolution up to 0.01 %

Low inherent distortion of 0.005 %

Automatic frequency fine tuning (capture range 15 %)

Control output for residual distortion measurement

A complete measurement system for AF measurement equipment in combination with the HM8037

Mainframe HM8001-2 required for operation

HM8037 Low-distortion sine wave generator

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S p e c i f i c a t i o n s

Distortion Meter HM8027

Valid at 23 °C after a 30 minute warm-up period

Frequency range

20 Hz - 20 kHz subdivided into 3 ranges variable frequency control 10:1, overlapping ranges

Distortion measurement range

0.01 % - 50 %, subdivided into 2 ranges

Full range:

Display resolution:

10 % and 100 %

100 % range: 0.1 %

10 % range: 0.01 %

Display accuracy

100 % range:

10 % range:

±5 % ±1 digit for k

≤ 10 %

±5 % ±1 digit for k

≤ 1 %

Inherent distortion + noise

≤ 0.5 digit

Fundamental rejection

30 dB greater than the measured distortion factor or

≥ 70 dB in the 100 % range or

≥ 90 dB in the 10 % range

Input voltage

min. for 100 % calibration: 300 mV max. for 100 % calibration:50 V

Input impedance

100 kΩ

Monitor output

Output voltage:

Output impedance:

Input attenuation

Operating temperature:

Max. relative humidity:

1 mV/digit (short-circuit proof)

10 kΩ

1 constant attenuator – 20 dB

1 constant attenuator – 10 dB

1 variable attenuator – 15 dB

Miscellaneous

1 selectable high-pass filter: 1 kHz, 12 dB/octave

Power supply

(from mainframe):

+12 V/60 mA

- 12 V/60 mA

+5 V/100 mA

(∑ = 1.94 W)

+10° C to +40° C

80 % (without condensation)

Dimensions (W x H x D) (without 22-pole flat plug):

135 x 68 x 228 mm

Weight: approx. 0.65 kg

Accessories supplied: Operator’s Manual

Optional accessories: HZ33/HZ34 BNC Test Cable, HZ20 BNC banana adapter,

HZ10 Silicone test leads w w w . h a m e g . c o m

HM8014E/140705/ce · Subject to alterations · © HAMEG Instruments GmbH · ® Registered Trademark · DQS-certified in accordance with DIN EN ISO 9001:2000, Reg.-No.: DE-071040 QM

HAMEG Instruments GmbH · Industriestr. 6 · D-63533 Mainhausen · Tel +49 (0) 6182 800 0 · Fax +49 (0) 6182 800 100 · www.hameg.com · info

@hameg.com

A Rohde & Schwarz Company

Subject to change without notice

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C o n t r o l e l e m e n t s

Control elements

Display(7-segment LEDs)

3-digit display for indication of the mea sured distortion factor in %.

FREQUENCY RANGE switches)

Selection of frequency range for signal under test (20 Hz-

200 Hz, 200 Hz-2 kHz, 2 kHz-20 kHz).

OUTPUT (BNC connector)

Monitor output for distortion factor (Residual distortion).

Output voltage is 1 mV/digit.

TUNING INDICATOR (LEDs)

If the built-in fi lter is incorrectly tuned, one of the two LEDs will indicate in which direction the fi lter frequency de viates from the input frequency. Turn the tuning knob in the opposite direc tion until the LED goes out.

TUNING (Adjusting knob)

Permits tuning of the built-in fi lter for maximum rejection of the fundamental wave. Fine tuning is automatic with a capture range of approx. 15%. If both LEDs are off, the fi lter is properly synchronised.

DISTORTION (Pushbutton switches)

Range selection for 10% or 100% fuII scale.

100%-CALIBRATION switch)

Selection of calibration mode. Adjust ment for 100% reading with LEVEL .

LEVEL (Adjusting knob)

Continuous attenuation of input signal up to max. 15 dB to achieve 100% reading when in the calibration mode.

INPUT (BNC connector)

Input for measurement signal. The permissible input voltage range is 0.3 V - 50 V for a valid measurement.

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Subject to change without notice

1kHz HIGH-PASS

(Pushbutton kHz fi lter with a roll off of 12 dB/octave for rejection of low fre quency hum and noise.

ATTENUATOR (Pushbutton switch)

Input signal attenuation with two push button switches of

20 dB or 10 dB attenuation, respectively. They can be used separately. Both pushbutton swi t ches activated, together with the variable attenuator must enable a 100% reading when in the calibration mode, otherwise the input voltage should be adjusted.

Operational check

Measuring equipment required

– 2 Low Distortion Generators (e.g. HM8037)

– Digital multimeter with 200 mV

AC

range (e.g. HM8012)

Check of input sensitivity

Setting:

2k Cal. max. 0dB released

1) Adjust the output voltage of the HM8037 to 300 mV at

1 kHz.

2) Connect the output of the HM8037 to the input of

HM8027.

3) With the above setting the display of the HM8027 should indicate a value ≥100.

Check of input signal attenuation

Setting:

2k Cal. max. odB released

1) Connect the output of the HM8037 to the in put of the

HM8027.

2) Adjust readout to 100 by means of the amplitude control of the Sine Wave Generator HM8037.

A d j u s t m e n t

3) Check the following values:

Min. position, = 0 dB, Display ≤19

Max. position, = –10 dB, Display ≤30

Max. position, = –20 dB, Display ≤10

Check of monitor output

Setting:

2k Cal. max. 0dB released

1) Connect the output of the HM8037 to the input of

HM8027.

2) Adjust the output voltage of the Sine Wave Generator

HM8037 at 1 kHz to get a readout of 100 on HM8027.

3) Measure the output voltage at the mo nitor output of

HM8027 using the DMM HM8012. The obtained value should be 100 mV ±5%.

Check of high pass fi lter

Setting: released

1) Set the frequency of the Sine Wave Generator HM8037 to

100 Hz.

2) Calibrate the display of HM8027 to 100.

3) Select the 100%-distortion range with one of the pushbuttons .

4) Switch the high-pass fi lter on by pushing pushbutton .

5) Check display for ≤5.

Check of residual distortion

1) Connect the output of the HM8037 to the input of

HM8027.

2) Calibrate the readout of the HM8027 to 100.

3) Check the readout of the HM8027 for ≤0.01 on 10% range according to the frequ encies listed below.

Range

200 Hz

2 kHz

20 kHz

20 Hz 200 Hz

200 Hz 2 kHz

2 kHz 10 kHz

Check of distortion measurement ranges

1) Adjust both Sine Wave Generators HM8037 for an output of 1 V. Verify with HM8012. Frequency setting 200 Hz and

1600 Hz is recommended.

2) Connect both generators to the input of the HM8027 according to the circuit below.

3) Setting:

2k tuned 100% 100%

4) Reading on HM8027 should be 10.0 ±5%.

5) Change the output voltage of Generator 2 to 100 mV (–20 dB).

Verify with HM8012.

6) Change the setting of the distortion measure ment range to

10% by pushing .

7) Check readout of HM8027 for 1.00 ± 5%.

8) In this case it must be possible to mea sure a signal of 1.6 kHz with an amplitude of 100 mV at output of HM8027.

Control range of automatic frequency tuning

Setting: released

1) Connect the output of HM8037 to input of HM8027.

Set the frequency to 1 kHz.

2) Calibrate the HM8027 to 100% and align the frequency by means of the control knob .

3) Adjust the frequency control of HM8027 by means of the control knob so, that the right LED just lights.

4) Adjust the frequency of HM8037 until the left LED lights.

5) The frequency setting of HM8037 should now be approx.

1.15 kHz. This corres ponds to the specifi ed 15% automatic tuning range.

Adjustment

Display zero adjustment

Setting:

2k Cal. mid

Gain adjustment

Setting:

2k Cal. -10dB

0dB

1) Adjust both sine wave generators HM8037 to an output of 1 V.

Verify with HM8012. Frequency setting 200 Hz and 1600 Hz is recommended.

2) Connect both generators to the input of HM8027 according to the circuit in the section operational check.

3) Connect the HM8012 (setting 2 V

AC

) to test point E on the test connector CN101.

4) Adjust the measured value to 300 mV by means of the amplitude control (A).

5) Tune the frequency control until the LEDs extinguish.

6) Select the 100% measurement range with .

7) Adjust the readout for 10.0 by means of VR103.

Calibration adjustment

1) Same settings and connections as Gain adjustment.

2) Select the calibration mode by means of push button .

3) Adjust VR301 for 100% readout .

Adjustment of frequency control circuit

Setting:

2k Cal. -10dB 100%Cal.

1) Connect the output of HM8037 to the input of HM8027

(output voltage 1 V, 1 kHz).

2) Adjust the display for 100 by means of the level control knob .

3) Tune the frequency control until the LEDs extinguish.

4) Adjust the frequency control of HM8027 so that the right

LED lights.

5) Set the frequency of HM8037 to 1150 Hz.

6) Adjust VR101 so that the left LED lights.

Frequency compensation

1) Connect the output of HM8037 to the input of HM8027.

2) Tune the HM8027 for correct distortion rea ding.

3) Measure and take note of DC-voltage at the point A of the test connector CN101 (-5 V

DC

typ.).

4) Adjust the frequency of HM8037 to 20 kHz.

5) Recalibrate and readjust the HM8027.

6) Adjust VC101 to obtain a DC-Voltage same as 3) ±100 mV.

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C i r c u i t a n d l a y o u t d i a g r a m s

8

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C i r c u i t a n d l a y o u t d i a g r a m s

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C i r c u i t a n d l a y o u t d i a g r a m s

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C i r c u i t a n d l a y o u t d i a g r a m s

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Oscilloscopes

Spectrum Analyzer

Power Supplies

Modular System

8000 Series

Programmable Instruments

8100 Series authorized dealer

w w w . h a m e g . d e

Subject to change without notice

4S-8027-00E0 / 09-11-2005-gw

© HAMEG Instruments GmbH

A Rohde & Schwarz Company

® registered trademark

DQS-Certifi cation: DIN EN ISO 9001:2000

Reg.-Nr.: 071040 QM

HAMEG Instruments GmbH

Industriestraße 6

D-63533 Mainhausen

Tel +49 (0) 61 82 800-0

Fax +49 (0) 61 82 800-100 [email protected]

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