Agilent Technologies 34450A 5 1/2 Digit Multimeter Manual de servicio

Agilent TechnologiesAgilent 34450A 5½ Digit MultimeterService Guide

X 34450A Service GuideAdditional NoticesThe Agilent 34450A is provided with an Agilent 34138A Test Lead Set, described below.Test Lead RatingsTest Lea

34450A Service Guide XIDeclaration of Conformity (DoC)The Declaration of Conformity (DoC) for this instrument is available on the Web site. You can se

XII 34450A Service GuideTHIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

34450A Service Guide XIIITable of Contents1 Performance Tests and CalibrationCalibration Overview 2Closed-case calibration 2Agilent Technolo

XIV 34450A Service GuideZero adjustment 29Gain adjustments 29DC voltage gain adjustment procedure 30DC current gain adjustments procedu

34450A Service Guide XVList of TablesTab l e 1- 1 Recommended test equipment 4Tab l e 1- 2 Zero offset verification test 10Tab l e 1- 3 DC

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1Agilent 34450A 5½ Digit MultimeterService GuideAgilent Technologies1Performance Tests and CalibrationCalibration Overview 2Recommended Test Equipm

1 Performance Tests and Calibration Calibration Overview2 34450A Service GuideCalibration Overview.Closed-case calibrationThe instrument features clo

Performance Tests and Calibration 1 Calibration Overview34450A Service Guide 3Calibration intervalA one year interval is adequate for most application

II 34450A Service GuideNotices© Agilent Technologies, Inc., 2012–2013No part of this manual may be reproduced in any form or by any means (including e

1 Performance Tests and Calibration Recommended Test Equipment4 34450A Service GuideRecommended Test EquipmentThe test equipment recommended for the

Performance Tests and Calibration 1 Test Considerations34450A Service Guide 5Test ConsiderationsErrors may be induced by AC signals present on the inp

1 Performance Tests and Calibration Test Considerations6 34450A Service GuideInput connectionsTest connections to the instrument are best accomplishe

Performance Tests and Calibration 1 Performance Verification Tests Overview34450A Service Guide 7Performance Verification Tests OverviewUse the perfor

1 Performance Tests and Calibration Performance Verification Tests Overview8 34450A Service Guide• If all tests pass, you have a high confidence (~90

Performance Tests and Calibration 1 Performance Verification Tests34450A Service Guide 9Performance Verification TestsThe performance verification tes

1 Performance Tests and Calibration Performance Verification Tests10 34450A Service GuideZero offset verification test1 Connect the shorting plug to

Performance Tests and Calibration 1 Performance Verification Tests34450A Service Guide 11Gain verificationThis test checks the full- scale reading acc

1 Performance Tests and Calibration Performance Verification Tests12 34450A Service Guide2 Select each function and range in the order shown below. P

Performance Tests and Calibration 1 Performance Verification Tests34450A Service Guide 132 Select each function and range in the order shown below. Pr

34450A Service Guide IIISafety SymbolsThe following symbols on the instrument and in the documentation indicate precautions that must be taken to main

1 Performance Tests and Calibration Performance Verification Tests14 34450A Service GuideOhms gain verification testConfiguration: 4- W Ohms (CONFigu

Performance Tests and Calibration 1 Performance Verification Tests34450A Service Guide 152 Select the 4- W Ohms or 2- W Ohms function.3 Select each ra

1 Performance Tests and Calibration Performance Verification Tests16 34450A Service GuideFrequency gain verification testConfiguration: Frequency (CO

Performance Tests and Calibration 1 Performance Verification Tests34450A Service Guide 17AC voltage verification testConfiguration: AC Volts (CONFigur

1 Performance Tests and Calibration Performance Verification Tests18 34450A Service Guide1 V1 kHz 1 V Q ±3 mV1 V10 kHz 1 V ±3 mV1 V30 kHz 1 V ±18 mV1

Performance Tests and Calibration 1 Performance Verification Tests34450A Service Guide 19AC current verification testConfiguration: AC current (CONFig

1 Performance Tests and Calibration Performance Verification Tests20 34450A Service Guide2 Select the AC current function.3 Select each range in the

Performance Tests and Calibration 1 Performance Verification Tests34450A Service Guide 211 A 1 kHz 1 A ±6 mA1 A 5 kHz 1 A ±22 mA10 A 45 Hz 10 A ±60 mA

1 Performance Tests and Calibration Performance Verification Tests22 34450A Service GuideCapacitance performance verification testConfiguration: Capa

Performance Tests and Calibration 1 Calibration Security34450A Service Guide 23Calibration SecurityThe calibration security code prevents accidental o

IV 34450A Service GuideRegulatory MarkingsThe CE mark is a registered trademarkof the European Community. This CEmark shows that the product compliesw

1 Performance Tests and Calibration Calibration Security24 34450A Service GuideUnsecuring the instrument for calibrationBefore you can adjust the ins

Performance Tests and Calibration 1 Calibration Security34450A Service Guide 25Example 3Assume the calibration security code has been set to ATB1 thro

1 Performance Tests and Calibration Calibration Process26 34450A Service GuideCalibration ProcessThe following general procedure is the recommended m

Performance Tests and Calibration 1 Calibration Process34450A Service Guide 27Using the front panel for adjustmentsThis section describes the process

1 Performance Tests and Calibration Calibration Process28 34450A Service GuideCAUTIONIf you abort a calibration in progress, all calibration constant

Performance Tests and Calibration 1 Adjustments34450A Service Guide 29AdjustmentsYou will need a test input cable and connectors set, and a shorting p

1 Performance Tests and Calibration Adjustments30 34450A Service GuideValid gain and frequency compensation input values. Gain adjustment can be acco

Performance Tests and Calibration 1 Adjustments34450A Service Guide 31Calibration mode: DC voltage1 Apply the input signal shown in the Calibration Po

1 Performance Tests and Calibration Adjustments32 34450A Service GuideDC current gain adjustments procedureReview the “Test Considerations” on page 5

Performance Tests and Calibration 1 Adjustments34450A Service Guide 33AC voltage gain adjustment procedureReview the “Test Considerations” on page 5 a

34450A Service Guide VGeneral Safety InformationThe following general safety precautions must be observed during all phases of operation, service, and

1 Performance Tests and Calibration Adjustments34 34450A Service Guide• An adjustment failure is indicated by a message in the Status box showing FA

Performance Tests and Calibration 1 Adjustments34450A Service Guide 35AC current gain adjustment procedureReview the “Test Considerations” on page 5 a

1 Performance Tests and Calibration Adjustments36 34450A Service GuideOhms gain adjustment procedureReview the “Test Considerations” on page 5 and “G

Performance Tests and Calibration 1 Adjustments34450A Service Guide 376 When the calibration has been completed for the selected range, the status box

1 Performance Tests and Calibration Adjustments38 34450A Service GuideCapacitance gain adjustment procedureReview the “Test Considerations” on page 5

Performance Tests and Calibration 1 Adjustments34450A Service Guide 39Frequency gain adjustment procedureReview the “Test Considerations” on page 5 an

1 Performance Tests and Calibration Calibration Message40 34450A Service GuideCalibration MessageThe instrument allows you to store a message in cali

Performance Tests and Calibration 1 Calibration Errors34450A Service Guide 41Calibration ErrorsThe following errors indicate failures that may occur d

1 Performance Tests and Calibration Calibration Errors42 34450A Service GuideTHIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

43Agilent 34450A 5½ Digit MultimeterService GuideAgilent Technologies2Disassembly and RepairOperating Checklist 44Types of Services Available 45

VI 34450A Service GuideProtection LimitsThe Agilent 34450A 5½ Digital Multimeter provides protection circuitry to prevent damage to the instrument and

2 Disassembly and Repair Operating Checklist44 34450A Service GuideOperating ChecklistBefore returning your multimeter to Agilent for service or repa

Disassembly and Repair 2 Types of Services Available34450A Service Guide 45Types of Services AvailableIf your instrument fails during the warranty per

2 Disassembly and Repair Repackaging for Shipment46 34450A Service GuideRepackaging for ShipmentIf the unit is to be shipped to Agilent for service o

Disassembly and Repair 2 To Replace the Power Line Fuse34450A Service Guide 47To Replace the Power Line FuseThe power line fuse is located within the

2 Disassembly and Repair To Replace a Current Input Fuse48 34450A Service GuideTo Replace a Current Input Fuse Both the 100 mA and the 10 A current i

Disassembly and Repair 2 To Verify your Device License34450A Service Guide 49To Verify your Device License1 Go to page 2 of the Utility Menu as shown

2 Disassembly and Repair Self Test Errors50 34450A Service GuideSelf Test ErrorsThe 34450A self test (see the *TST? command) performs a series of tes

Disassembly and Repair 2 Electrostatic Discharge (ESD) Precautions34450A Service Guide 51Electrostatic Discharge (ESD) PrecautionsAlmost all electrica

2 Disassembly and Repair Mechanical Disassembly52 34450A Service GuideMechanical DisassemblyFor procedures in this manual, the following tools are re

Disassembly and Repair 2 Mechanical Disassembly34450A Service Guide 533 Remove the instrument bumpers. Pull from a corner and stretch the bumpers off

34450A Service Guide VIIWARNING• Do not defeat the power cord safety ground feature. Plug in to a grounded (earthed) outlet.• Do not use the instrumen

2 Disassembly and Repair Mechanical Disassembly54 34450A Service Guide5 Remove the cover. Remove the screw in the bottom of the cover and slide the c

Disassembly and Repair 2 Mechanical Disassembly34450A Service Guide 557 Disconnect the ribbon cable connectors from the front panel.8 Disconnect the i

2 Disassembly and Repair Mechanical Disassembly56 34450A Service Guide9 Disconnect the fuse wire as shown in the figure below:10 There is now enough

Disassembly and Repair 2 Mechanical Disassembly34450A Service Guide 57Front panel 1 Remove the keyboard and display assembly. Remove the screw from th

2 Disassembly and Repair Replaceable Parts58 34450A Service GuideReplaceable PartsThis section contains information for ordering replaceable parts fo

Disassembly and Repair 2 Replaceable Parts34450A Service Guide 592110-1503 Fuse 0.4 A, 500 V Fast Acting 32 × 6.3 × 6.3 mm2110-1533 Fuse 0.25 A 250 V

2 Disassembly and Repair Rack Mounting60 34450A Service GuideRack MountingYou can mount the multimeter in a standard 19- inch rack cabinet using one

© Agilent Technologies, Inc., 2012–2013Third Edition, August 30, 201334450-90029www.agilent.comAgilent TechnologiesContact usTo obtain service, warran

VIII 34450A Service GuideEnvironmental ConditionsThis instrument is designed for indoor use and in an area with low condensation. The table below show

34450A Service Guide IXWaste Electrical and Electronic Equipment (WEEE) Directive 2002/96/ECThis instrument complies with the WEEE Directive (2002/96/