Agilent Technologies 34405A Service Manual

Agilent TechnologiesAgilent 34405A5 ½ Digit MultimeterUser’s and Service Guide

X 34405A User’s and Service GuideContentsMechanical Disassembly 113Replaceable Parts 120Rack Mounting 1216 Specifications 123DC Specifications[1]125AC

100 34405A User’s and Service Guide4 Performance Tests and Calibration4 Use (Auto) or (Range) to select the Cal Item.5 Apply the input signal

Performance Tests and Calibration 434405A User’s and Service Guide 101Finishing the Adjustments1 Remove all shorting plugs and connections from the in

102 34405A User’s and Service Guide4 Performance Tests and CalibrationCalibration MessageThe instrument allows you to store a message in calibration m

Performance Tests and Calibration 434405A User’s and Service Guide 103Calibration ErrorsThe following errors indicate failures that may occur during a

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105Agilent 34405A 5 ½ Digit MultimeterUser’s and Service GuideAgilent Technologies5Disassembly and RepairOperating Checklist 106Types of Service Avail

106 34405A User’s and Service Guide5 Disassembly and RepairOperating ChecklistBefore returning your multimeter to Agilent for service or repair check

34405A User’s and Service Guide 107Disassembly and Repair 5Types of Service AvailableIf your instrument fails during the warranty period, Agilent Tech

108 34405A User’s and Service Guide5 Disassembly and RepairRepackaging for ShipmentIf the unit is to be shipped to Agilent for service or repair, be s

34405A User’s and Service Guide 109Disassembly and Repair 5To Replace the Power Line FuseThe power line fuse is located within the multimeter’s fuse–h

11Agilent TechnologiesAgilent 34405A 5 ½ Digit MultimeterUser’s and Service Guide1Getting Started TutorialIntroducing the Agilent 34405A Multimeter 12

110 34405A User’s and Service Guide5 Disassembly and RepairTo Replace a Current Input Fuse Both the 1.2A and the 12A current input terminals are fuse

34405A User’s and Service Guide 111Disassembly and Repair 5Self-Test ErrorsThe following errors indicate failures that may occur during a self- test.N

112 34405A User’s and Service Guide5 Disassembly and RepairElectrostatic Discharge (ESD) PrecautionsAlmost all electrical components can be damaged by

34405A User’s and Service Guide 113Disassembly and Repair 5Mechanical DisassemblyFor procedures in this manual, the following tools are required for d

114 34405A User’s and Service Guide5 Disassembly and Repair3 Remove the instrument bumpers. Pull from a corner and stretch the bumpers off the instrum

34405A User’s and Service Guide 115Disassembly and Repair 55 Remove the cover. Remove the screw in the bottom of the cover and slide the cover off the

116 34405A User’s and Service Guide5 Disassembly and Repair7 Remove the two screws holding the front panel.8 Disconnect the two ribbon cable connector

34405A User’s and Service Guide 117Disassembly and Repair 59 Disconnect the individual front panel wires shown below.10 There is now enough play to al

118 34405A User’s and Service Guide5 Disassembly and RepairFront Panel Disassembly1 Remove the keyboard and display assembly. Using a flat blade screw

34405A User’s and Service Guide 119Disassembly and Repair 5a The rubber keypad can now be pulled from the plastic housing.

12 34405A User’s and Service Guide1 Getting Started TutorialIntroducing the Agilent 34405A MultimeterThe multimeter’s key features are:• 5 ½- digit du

120 34405A User’s and Service Guide5 Disassembly and RepairReplaceable PartsThis section contains information for ordering replacement parts for your

34405A User’s and Service Guide 121Disassembly and Repair 5Rack MountingYou can mount the multimeter in a standard 19- inch rack cabinet using one of

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123Agilent TechnologiesAgilent 34405A 5 ½ Digit MultimeterUser’s and Service Guide6SpecificationsDC Specifications[1] 125AC Specifications[1] 126Tempe

124 34405A User’s and Service Guide6 SpecificationsThese specifications apply when using the 34405A multimeter in an environment that is free of elect

Specifications 634405A User’s and Service Guide 125DC Specifications[1]Table 24 DC Accuracy ± (% of reading + % of range) Function Range [2]Test Curre

126 34405A User’s and Service Guide6 SpecificationsAC Specifications[1]WARNINGExceeding the crest factor limit may result in an incorrect or a lower r

Specifications 634405A User’s and Service Guide 127Table 26 Frequency Accuracy ± (% of reading + 3 counts)Function Range [5]Frequency 1 Year 23° C ± 5

128 34405A User’s and Service Guide6 SpecificationsTemperature and Capacitance Specifications[1][1] Specifications are for 30 minutes warm-up, 5½-digi

Specifications 634405A User’s and Service Guide 129Operating Specifications[1] Reading rate of the A/D converter.[2] Time to change from 2-wire resist

Getting Started Tutorial 134405A User’s and Service Guide 13Checking the Shipping ContentsVerify that you have received the following items with your

130 34405A User’s and Service Guide6 SpecificationsSupplemental Measurement SpecificationsTable 29 Supplemental Measurement SpecificationsDC Voltage•

Specifications 634405A User’s and Service Guide 131Continuity / Diode Test• Measurement Method:• Uses 0.83mA ± 0.2% constant current source, < 5V o

132 34405A User’s and Service Guide6 Specifications• Crest Factor:• Maximum 5:1 at full scale• Input Impedance:• 1MΩ ± 2% in parallel with < 100pF

Specifications 634405A User’s and Service Guide 133Math Functions• Null, dBm, dB, Min/Max/Avg, Hold, Limit TestTriggering and Memory• Single trigger,

134 34405A User’s and Service Guide6 SpecificationsGeneral CharacteristicsTable 30 General CharacteristicsPower Supply• 100V/120V(127V)/220V(230V)/240

Specifications 634405A User’s and Service Guide 135• Bench: 103.8mm x 261.1mm x 303.2 mmWeight• 3.75 kg (8.27 lb.) approximateWarm Up Time• 30 minutes

136 34405A User’s and Service Guide6 SpecificationsTo Calculate Total Measurement ErrorThe multimeter's accuracy specifications are expressed in

Specifications 634405A User’s and Service Guide 137Accuracy SpecificationsTransfer AccuracyTransfer accuracy refers to the error introduced by the mul

138 34405A User’s and Service Guide6 SpecificationsConfiguring for Highest Accuracy MeasurementsThe measurement configurations shown below assume that

34405A User’s and Service Guide 139IndexAAC Characteristics, 126AC CurrentGain Adjustment Procedure, 95Performance Verification Test, 80Verification T

14 34405A User’s and Service Guide1 Getting Started TutorialAdjusting the HandleTo adjust the handle, grasp the handle by the sides and pull outward.

140 34405A User’s and Service GuideIndexGGainAdjustment Considerations, 90Adjustment Procedure, 91Adjustments, 89Verification, 73General Characteristi

34405A User’s and Service Guide 141IndexReplaceCurrent Input Fuse, 110Power Line Fuse, 109Replaceable Parts, 120Reset/Power-On State, 43Resistance Mea

142 34405A User’s and Service GuideIndexTHIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

© Agilent Technologies, Inc., 2006–2014Thirteenth Edition, July 3, 201434405-91000www.agilent.comAgilent TechnologiesContact usTo obtain service, warr

Getting Started Tutorial 134405A User’s and Service Guide 15The Front Panel at a Glance12Arms1000VDC500Vpk1.2Arms1.25A/500V FHLOCAT II (300V)750VACHII

16 34405A User’s and Service Guide1 Getting Started TutorialThe Display at a GlanceThe System Annunciators (above the primary display) are described b

Getting Started Tutorial 134405A User’s and Service Guide 17The Rear Panel at a Glance4 AC Power Connector5 AC Line Voltage Selector6 AC Line Fuse1 US

18 34405A User’s and Service Guide1 Getting Started TutorialRemote OperationThe instrument automatically enters the Remote state whenever SCPI command

Getting Started Tutorial 134405A User’s and Service Guide 19SCPI Language VersionYou can determine the multimeter’s SCPI language version by sending t

II 34405A User’s and Service GuideNotices© Agilent Technologies, Inc. 2006–2014No part of this manual may be reproduced in any form or by any means (i

20 34405A User’s and Service Guide1 Getting Started TutorialMaking MeasurementsThe following pages show how to make measurement connections and how to

Getting Started Tutorial 134405A User’s and Service Guide 21Measuring Resistance• Seven Ranges: 100.000Ω, 1.00000 kΩ, 10.0000 kΩ, 100.000 kΩ, 1.00000

22 34405A User’s and Service Guide1 Getting Started TutorialMeasuring AC (RMS) or DC Current up to 12A• 10 Amp AC Current or DC Current Range• Shunt R

Getting Started Tutorial 134405A User’s and Service Guide 23Testing Continuity• Measurement Method: 0.83 mA ± 0.2% constant current source, < 5 V o

24 34405A User’s and Service Guide1 Getting Started TutorialMeasuring Capacitance• Eight ranges: 1nF, 10nF, 100nF, 1µF, 10µF, 100µF, 1000µF, 10,000µF

Getting Started Tutorial 134405A User’s and Service Guide 25Selecting a RangeYou can let the multimeter automatically select the range using autorangi

26 34405A User’s and Service Guide1 Getting Started TutorialSetting the ResolutionYou can select either 4½ or 5½- digit resolution for the DCV, DCI, r

27Agilent TechnologiesAgilent 34405A 5 ½ Digit MultimeterUser’s and Service Guide2Features and FunctionsMath Operations 28Using the Secondary Display

28 34405A User’s and Service Guide2 Features and FunctionsMath OperationsThe table below describes the math operations that can be used with each meas

Features and Functions 234405A User’s and Service Guide 29NullWhen making null measurements, also called relative, each reading is the difference betw

34405A User’s and Service Guide IIISafety InformationDo not defeat power cord safety ground fea-ture. Plug in to a grounded (earthed) outlet. Do not u

30 34405A User’s and Service Guide2 Features and FunctionsdBWhen enabled, the dB operation computes the dBm value for the next reading, stores the dBm

Features and Functions 234405A User’s and Service Guide 31When Min/Max is enabled, pressing steps through the various Max, Min, Avg, and N values in

32 34405A User’s and Service Guide2 Features and FunctionsThe decision to update a new reading value in the primary display is based upon the box- car

Features and Functions 234405A User’s and Service Guide 33Using the Secondary DisplayMost measurement functions have predefined range or measurement c

34 34405A User’s and Service Guide2 Features and FunctionsThe table below shows the secondary display capabilities for all measurement functions.Repea

Features and Functions 234405A User’s and Service Guide 35Math Operations and the Secondary DisplayWhen a math operation is selected, the secondary di

36 34405A User’s and Service Guide2 Features and FunctionsUsing the Utility MenuThe Utility Menu allows you to customize a number of non- volatile ins

Features and Functions 234405A User’s and Service Guide 37Changing Configurable SettingsThe first seven items in the Utility Menu are configurable (Er

38 34405A User’s and Service Guide2 Features and FunctionsReading Error Messages The following procedure shows you to read error messages from the fro

Features and Functions 234405A User’s and Service Guide 39The BeeperNormally, the multimeter beeps whenever certain conditions are met (for example, t

IV 34405A User’s and Service GuideProtection LimitsThe Agilent 34405A Digital Multimeter pro-vides protection circuitry to prevent damage to the instr

40 34405A User’s and Service Guide2 Features and FunctionsEditing Values in the Secondary Display Many Math function values are editable in the second

Features and Functions 234405A User’s and Service Guide 41Storing and Recalling Instrument StatesYou can save and recall complete instrument states in

42 34405A User’s and Service Guide2 Features and FunctionsRecalling a Stored StateTo recall an instrument state:1 Press , the display Store and Recal

Features and Functions 234405A User’s and Service Guide 43Reset/Power-On StateThe table below summarizes the 34405A's settings as received from t

44 34405A User’s and Service Guide2 Features and Functions*State managed by IO Processor firmware.Reading Output Buffer* Cleared ClearedError Queue* C

Features and Functions 234405A User’s and Service Guide 45Triggering the MultimeterFrom the front panel (Local mode), the multimeter always auto–trigg

46 34405A User’s and Service Guide2 Features and Functions• The MEASure? command overwrites the BUS trigger and triggers the DMM and returns a measure

47Agilent 34405A 5 ½ Digit MultimeterUser’s and Service GuideAgilent Technologies3Measurement TutorialDC Measurement Considerations 48Noise Rejection

48 34405A User’s and Service Guide3 Measurement TutorialDC Measurement ConsiderationsThermal EMF ErrorsThermoelectric voltages are the most common sou

34405A User’s and Service Guide 49Measurement Tutorial 3Noise RejectionRejecting Power–Line Noise VoltagesA desirable characteristic of integrating an

34405A User’s and Service Guide VAdditional NoticesThis product complies with the WEEE Direc-tive (2002/96/EC) marking requirement. The affixed produc

50 34405A User’s and Service Guide3 Measurement Tutorialvibrating test leads will also induce error voltages. Tie down test leads securely when operat

34405A User’s and Service Guide 51Measurement Tutorial 3Resistance Measurement ConsiderationsWhen measuring resistance, the test current flows from th

52 34405A User’s and Service Guide3 Measurement TutorialErrors in High Resistance MeasurementsWhen you are measuring large resistances, significant er

34405A User’s and Service Guide 53Measurement Tutorial 3True RMS AC MeasurementsTrue RMS responding multimeters, like the Agilent 34405A, measure the

54 34405A User’s and Service Guide3 Measurement TutorialAn AC–coupled true RMS measurement is desirable when you are measuring small AC signals in the

34405A User’s and Service Guide 55Measurement Tutorial 3With this multimeter, as discussed in the previous section, the focal issue is high–frequency

56 34405A User’s and Service Guide3 Measurement TutorialOther Primary Measurement FunctionsFrequency Measurement ErrorsThe multimeter uses a reciproca

34405A User’s and Service Guide 57Measurement Tutorial 3Capacitance MeasurementsThe multimeter implements capacitance measurements by applying a known

58 34405A User’s and Service Guide3 Measurement TutorialTemperature MeasurementsThe multimeter measures temperature by measuring the temperature sensi

34405A User’s and Service Guide 59Measurement Tutorial 3Other Sources of Measurement ErrorLoading Errors (AC volts)In the AC voltage function, the inp

VI 34405A User’s and Service GuideDeclaration of Conformity (DoC)The Declaration of Conformity (DoC) for this instrument is available on the Web site.

60 34405A User’s and Service Guide3 Measurement TutorialAC Current Measurement Errors (Burden Voltage)Burden voltage errors, which apply to DC current

34405A User’s and Service Guide 61Measurement Tutorial 3Pulse Measurement ErrorYou can use the DC measurement function to measure a pulse signal and o

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63Agilent TechnologiesAgilent 34405A 5 ½ Digit MultimeterUser’s and Service Guide4Performance Tests and CalibrationCalibration Overview 64Recommended

64 34405A User’s and Service Guide4 Performance Tests and CalibrationCalibration OverviewClosed - Case Electronic CalibrationThe instruments features

Performance Tests and Calibration 434405A User’s and Service Guide 65Time Required for CalibrationThe 34405A can be automatically calibrated under com

66 34405A User’s and Service Guide4 Performance Tests and CalibrationRecommended Test EquipmentThe test equipment recommended for the performance veri

Performance Tests and Calibration 434405A User’s and Service Guide 67Test ConsiderationsErrors may be induced by AC signals present on the input leads

68 34405A User’s and Service Guide4 Performance Tests and CalibrationPerformance Verification Tests OverviewUse the Performance Verification Tests to

Performance Tests and Calibration 434405A User’s and Service Guide 69Quick Performance CheckThe quick performance check is a combination of internal s

34405A User’s and Service Guide VIIContents1 Getting Started Tutorial 11Introducing the Agilent 34405A Multimeter 12Checking the Shipping Contents 13C

70 34405A User’s and Service Guide4 Performance Tests and CalibrationPerformance Verification TestsThe performance verification tests are recommended

Performance Tests and Calibration 434405A User’s and Service Guide 71Zero Offset VerificationThis test is used to check the zero offset performance of

72 34405A User’s and Service Guide4 Performance Tests and Calibration[1] Select 5½- digit measurement resolution[2] Specifications are for 2- wire ohm

Performance Tests and Calibration 434405A User’s and Service Guide 73Gain VerificationThis test checks the full- scale reading accuracy of the instrum

74 34405A User’s and Service Guide4 Performance Tests and CalibrationDC Current Gain Verification Test1 Connect the calibrator to the front panel I an

Performance Tests and Calibration 434405A User’s and Service Guide 75Ohms Gain Verification TestConfiguration: 2- Wire Ohms (CONFigure:RESistance)1 Se

76 34405A User’s and Service Guide4 Performance Tests and CalibrationFrequency Gain Verification TestConfiguration: Frequency (CONFigure:FREQuency)1 S

Performance Tests and Calibration 434405A User’s and Service Guide 77AC Voltage Verification TestConfiguration: AC Volts (CONFigure[:VOLTage]:AC)1 Sel

78 34405A User’s and Service Guide4 Performance Tests and CalibrationAC Current Verification TestConfiguration: AC Current (CONFigure:CURRent:AC)1 Sel

Performance Tests and Calibration 434405A User’s and Service Guide 79Optional AC Voltage Performance Verification TestConfiguration: AC Volts (CONFigu

VIII 34405A User’s and Service GuideContentsMath Annunciators 32Using the Secondary Display 33Measurement Functions and the Secondary Display 33Math O

80 34405A User’s and Service Guide4 Performance Tests and CalibrationOptional AC Current Performance Verification TestConfiguration: AC Current (CONFi

Performance Tests and Calibration 434405A User’s and Service Guide 81Optional Capacitance Performance Verification TestConfiguration: Capacitance (CON

82 34405A User’s and Service Guide4 Performance Tests and CalibrationCalibration SecurityThe calibration security code prevents accidental or unauthor

Performance Tests and Calibration 434405A User’s and Service Guide 83Unsecuring the Instrument for CalibrationBefore you can adjust the instrument, yo

84 34405A User’s and Service Guide4 Performance Tests and CalibrationExample 3Assume the calibration security code has been set to ATB1 through remote

Performance Tests and Calibration 434405A User’s and Service Guide 85Calibration Process The following general procedure is the recommended method to

86 34405A User’s and Service Guide4 Performance Tests and CalibrationUsing the Front Panel for AdjustmentsThis section describes the process used to p

Performance Tests and Calibration 434405A User’s and Service Guide 87CAUTIONIf you abort a calibration in progress when the instrument is attempting t

88 34405A User’s and Service Guide4 Performance Tests and CalibrationAdjustmentsYou will need a test input cable and connectors set, and a Shorting Pl

Performance Tests and Calibration 434405A User’s and Service Guide 893 Press , the display CAL annunciator starts flashing to indicate the calibratio

Contents34405A User’s and Service Guide IXTest Considerations 67Input Connections 67Performance Verification Tests Overview 68Self -Test 68Quick Perfo

90 34405A User’s and Service Guide4 Performance Tests and CalibrationGain Adjustment Considerations• The zero adjustment procedure must have been rece

Performance Tests and Calibration 434405A User’s and Service Guide 91DC Voltage Gain Adjustment ProcedureReview the “Test Considerations” on page 67 a

92 34405A User’s and Service Guide4 Performance Tests and Calibration9 Verify the DC Voltage Gain adjustments using the “DC Voltage Gain Verif ication

Performance Tests and Calibration 434405A User’s and Service Guide 936 Enter the actual applied input (see “Entering Adjustment Values” on page 86).7

94 34405A User’s and Service Guide4 Performance Tests and CalibrationAC Voltage Gain Adjustment ProcedureReview the “Test Considerations” on page 67 a

Performance Tests and Calibration 434405A User’s and Service Guide 95AC Current Gain Adjustment ProcedureReview the “Test Considerations” on page 67 a

96 34405A User’s and Service Guide4 Performance Tests and Calibration6 Enter the actual applied input (see “Entering Adjustment Values” on page 86).7

Performance Tests and Calibration 434405A User’s and Service Guide 97Ohms Gain Adjustment ProcedureReview the “Test Considerations” on page 67 and “Ga

98 34405A User’s and Service Guide4 Performance Tests and Calibration9 Verify the Ohm Gain adjustments using the “Ohms Gain Verification Test” on page

Performance Tests and Calibration 434405A User’s and Service Guide 996 Enter the actual applied input (see “Entering Adjustment Values” on page 86).7