Agilent Technologies 3458A Manual de Instruções Página 1

Keysight 3458A MultimeterCalibration Manual

8 Chapter 1 3458A Calibration Introduction is shipped from the factory with its security code set to 3458. Specifying 0 for the new_code in the SECURE

98 Appendix A Specifications

Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3) 99Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3)A v

100 Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3) Saving Calibration Time and MoneyThe increasing accuracy required of today

Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3) 101Measurements using a Josephson junction standard confirm linearity of the

102 Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3) The user enters the exact value of the external 10 V DC voltage standard (

Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3) 103Resistance and DC Current AdjustmentsCalibration of all resistance (nine ra

104 Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3) The 3458A Multimeter produces the required step input voltage. Then, its a

Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3) 105SummaryElectronic internal calibration of the 3458A Multimeter simplifies

106 Appendix B Electronic Calibration of the 3458A (Product Note 3458A-3)

This information is subject to change without notice. © Keysight Technologies 1988 - 2014 Edition 7, August 2014*03458-90017*03458-90017www.keysight.c

Chapter 1 3458A Calibration Introduction 9display the SECURE command).f. Enter the number 0 followed by the delimiter (,) and the security code you

10 Chapter 1 3458A Calibration Introduction CAL. (or ACAL if secured) is executed. If autocal is secured, the calibration number is also incremented b

Chapter 1 3458A Calibration Introduction 11The remaining constants (such as internal reference and offset constants) are externally derived and not

12 Chapter 1 3458A Calibration Introduction

Chapter 2 Operational Verification Tests 13Chapter 2 Operational Verification TestsIntroductionThis section contains Operational Verification Tes

14 Chapter 2 Operational Verification Tests → scroll keys to view entire CAL? message. Record the temperatures on the Test Card.7. If the instrument

Chapter 2 Operational Verification Tests 159. Remove the short from the rear input terminals.4-Wire OhmsFunction Gain TestThe following procedure ve

16 Chapter 2 Operational Verification Tests chapter 4, Performance Verification Tests.1. Execute the ACAL DCV command using the front panel "Aut

Chapter 2 Operational Verification Tests 17Chapter 3 "Adjustment Procedures" to make adjustments.DC Voltage FunctionOffset TestThis proced

18 Chapter 2 Operational Verification Tests

19OPERATIONAL TEST CARD - 1 YEAR LIMITSKeysight Model 3458A Digital Multimeter Test Performed BySerial Number DateCAL? 60TEMP?Difference - (must be l

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Chapter 3 Adjustment Procedures 21Chapter 3 Adjustment ProceduresIntroductionThis section contains procedures for adjusting the 3458A Multimeter. T

22 Chapter 3 Adjustment Procedures The resultant accuracy of the multimeter depends on the accuracy of the equipment used, the thermal characteristic

Chapter 3 Adjustment Procedures 23Figure 1. 4-Terminal ShortFront Terminal Offset AdjustmentThis adjustment uses an external 4-terminal short. The

24 Chapter 3 Adjustment Procedures Note Take precautions to prevent thermal changes near the 4-wire short. You should not touch the short after it i

Chapter 3 Adjustment Procedures 25standard).Note Voltage standards from 1V DC to 12V DC can be used for this procedure. However, using a voltage st

26 Chapter 3 Adjustment Procedures Resistance and DCCurrent AdjustmentThis adjustment calculates gain corrections for the resistance and DC current r

Chapter 3 Adjustment Procedures 273. Set the front panel Terminals switch to Front.4. Connect the resistance standard to the multimeter's front

28 Chapter 3 Adjustment Procedures the frequency and period measurement functions: adjusts the attenuator and amplifier high frequency response; and a

Chapter 3 Adjustment Procedures 293. Set the synthesizer to deliver a 3V rms sinewave at a frequency of 100 kHz. Connect the synthesizer, the 3V th

30 Chapter 3 Adjustment Procedures 8. Set the synthesizer to deliver a 100mV rms sinewave at a frequency of 100 kHz. Replace the 1V thermal converter

Chapter 3 Adjustment Procedures 3114. Repeat step 13 for each synthesizer setting and SCAL command shown on Lines D through H on the Adjustment Reco

32 Chapter 3 Adjustment Procedures *Always perform the above adjustments numbered 1 through 4: adjustment number 5 is only required once every 2 year

Chapter 4 Performance Verification Tests 33Chapter 4 Performance Verification TestsIntroductionThis chapter contains performance tests designed t

34 Chapter 4 Performance Verification Tests Test Considerations This section discusses many of the major problems associated with low-level measureme

Chapter 4 Performance Verification Tests 35• Ground Loops: Ground loops arise when the multimeter and the circuit under test are grounded at physica

36 Chapter 4 Performance Verification Tests General TestProcedureThe following performance tests utilize a transfer standard DMM to precisely measure

Chapter 4 Performance Verification Tests 37Figure 6. General Test Procedure

2KEYSIGHT TECHNOLOGIES WARRANTY STATEMENTKEYSIGHT PRODUCT: 3458A Multimeter DURATION OF WARRANTY: 1 year1. Keysight Technologies warrants Keysight ha

38 Chapter 4 Performance Verification Tests DC Voltage Performance TestsRequired Equipment The following equipment or its equivalent is required for t

Chapter 4 Performance Verification Tests 39DC Voltage FunctionOffset TestThe following procedure tests the offset voltage specification with the inp

40 Chapter 4 Performance Verification Tests of the DMM.4. Set the range of the DMM to 100 mV. Wait five minutes for the DMM to thermally stabilize.5.

Chapter 4 Performance Verification Tests 4116. After all DC gain tests have been performed, calculate and record in the column provided. The differe

42 Chapter 4 Performance Verification Tests Analog AC Voltage Performance TestsRequired Equipment The following list of equipment is required to test

Chapter 4 Performance Verification Tests 43connection can be made using shielded test leads terminated with dual banana plugs. Refer to the general

44 Chapter 4 Performance Verification Tests points.11. If any of the differences calculated are greater than the specifiedlimits, refer to Chapter 3,

Chapter 4 Performance Verification Tests 45DC Current FunctionOffset TestThe following procedure tests the DC current offset specifications with the

46 Chapter 4 Performance Verification Tests current source.7. Connect the DC current source to the 3458A under test HI and LOinput terminals.8. Execut

Chapter 4 Performance Verification Tests 47done, turn the instrument ON and allow it to warm up before proceeding.3. The internal temperature of the

3Safety SymbolsAlternating current (AC)Instruction manual symbol affixed to product. Indicates that the user must refer to the manual for specific WAR

48 Chapter 4 Performance Verification Tests 4-Wire OhmsFunction Offset Test(Rear Terminals)This procedure performance verifies the rear terminal ohms

Chapter 4 Performance Verification Tests 49a. Note - At 10 MΩ, leakage current from the Sense leads introduce additionaluncertainty in the measureme

50 Chapter 4 Performance Verification Tests 4. Configure the DMM under test as follows:-- FREQ-- Trig SGL-- FSOURCE ACDCV-- LEVEL 0,DCFrequency Count

51PERFORMANCE TEST CARD - 1 YEAR LIMITSTest Performed ByKeysight Model 3458A Digital Multimeter Serial Number DateDC VOLTAGE TESTSCAL? 59TEMP?Differen

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53PERFORMANCE TEST CARD - 1 YEAR LIMITSTest Performed ByKeysight Model 3458A Digital Multimeter Serial NumberDateAC VOLTAGE TESTSPerform an ACAL ACTes

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55PERFORMANCE TEST CARD - 1 YEAR LIMITSTest Performed ByKeysight Model 3458A Digital Multimeter Serial NumberDateDC CURRENT TESTSCAL? 60TEMP?Differenc

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57PERFORMANCE TEST CARD - 1 YEAR LIMITSTest Performed ByKeysight Model 3458A Digital Multimeter Serial NumberDateOHMS TESTSCAL? 60TEMP?Difference - (

4Declares, that the productConforms with the following European Directives:The product herewith complies with the requirements of the Low Voltage Dire

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59PERFORMANCE TEST CARD - 1 YEAR LIMITSTest Performed ByKeysight Model 3458A Digital Multimeter Serial NumberDateFREQUENCY TESTSTest # 3458A Input3458

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Chapter 5 Command Summary 61Chapter 5 Command SummaryThis section provides an alphabetical summary of commands that are used in calibrating the 3

62 Chapter 5 Command Summary ACALDescription Autocal. Instructs the multimeter to perform one or all of its automatic calibrations.Syntax ACAL [type]

Chapter 5 Command Summary 63Example OUTPUT 722;"ACAL ALL,3458" !RUNS ALL AUTOCALS, SECURITY CODE IS 3458! (FACTORY SECURITY CODE SETTING)

64 Chapter 5 Command Summary CALDescription Calibration. Calibrates the internal 7V reference to an external 10V standard (CAL10) and does the equiva

Chapter 5 Command Summary 65CAL?Description Calibration query. Returns a string containing one of four values for the calibration constant specifie

66 Chapter 5 Command Summary 22 ohm zero rear 1023 ohm zero rear 10024 ohm zero rear 1 K25 ohm zero rear 10 K26 ohm zero rear 100 K27 ohm zero rear 1

Chapter 5 Command Summary 6767 dci zero rear 10 mA68 dci zero rear 100 mA -ACAL OHMS69 dci zero rear 1A70 dcv gain 100 mV71 dcv gain 1V72 dcv gain 1

Contents 5ContentsChapter 1 3458A Calibration IntroductionIntroduction ...7Calibration Se

68 Chapter 5 Command Summary 107 low aperture108 high aperture109 high aperture slope .01 PLC110 high aperture slope .1 PLC111 high aperture null .01

Chapter 5 Command Summary 69151 overload ohm ocomp 100152 overload ohm ocomp 1 K153 overload ohm ocomp 10 K154 overload ohm ocomp 100 K155 overload

70 Chapter 5 Command Summary 196 flatness dac 100 mV197 flatness dac 1V198 flatness dac 10V199 flatness dac 100V200 flatness dac 1 KV201 level dac dc

Chapter 5 Command Summary 71Remarks Related Commands: ACAL, CAL, SCALExample The following two program examples query the calibration constants. T

72 Chapter 5 Command Summary 60 PRINT "CONST =", N70 OUTPUT 722;"QFORMAT ALPHA"80 OUTPUT 722;"CAL?";N,T90 ENTER 722; A$

Chapter 5 Command Summary 73CALNUM?Description Calibration Number Query. Returns a decimal number indicating the number of times the multimeter has

74 Chapter 5 Command Summary CALSTRDescription Calibration String (remote only). Stores a string in the multimeter's nonvolatile calibration RAM

Chapter 5 Command Summary 75REV?Description Revision Query. Returns two numbers separated by a comma. The first number is the multimeter's outg

76 Chapter 5 Command Summary SCALDescription Service Calibration. Adjusts the AC sections of the instrument. Calculates the corrections to accurate

Chapter 5 Command Summary 77SECUREDescription Security Code. Allows the person responsible for adjustment to enter a security code to prevent accide

6 Contents

78 Chapter 5 Command Summary Disabling SecurityOUTPUT 722;"SECURE 3458,0" !DISABLES SECURITY FOR ADJUSTMENT AND AUTOCAL

Chapter 5 Command Summary 79TEMP?Description Temperature Query. Returns the multimeter's internal temperature in degrees Centigrade.Syntax TEMP

80 Chapter 5 Command Summary TESTDescription Causes the multimeter to perform a series of internal self-test.Syntax TESTRemarks • Always disconnect a

Appendix A Specifications 81Appendix A SpecificationsIntroductionThe 3458A accuracy is specified as a part per million (ppm) of the reading plus a

82 Appendix A Specifications 1 / DC VoltageDC VoltageAccuracy3 (ppm of Reading (ppm of Reading for Option 002) + ppm of Range)Transfer Accuracy/Linea

Appendix A Specifications 83Reading Rate (Auto-Zero Off) Temperature Coefficient (Auto-Zero off) For a stable environment ±1°C add the following ad

84 Appendix A Specifications 2 Accuracy1 (ppm of Reading + ppm of Range)Two-Wire Ohms AccuracyFor Two-Wire Ohms ( OHM ) accuracy, add the following

Appendix A Specifications 853 / DC CurrentDC Current (DCI Function)Accuracy 3 (ppm Reading + ppm Range)Range Full ScaleMaximum ResolutionShunt Resis

86 Appendix A Specifications 4 / AC VoltageGeneral InformationThe 3458A supports three techniques for measuring true rms AC voltage, each offering un

Appendix A Specifications 87AC Accuracy (continued): 24 Hour to 2 Year (% of Reading + % of Range)Transfer AccuracyAC + DC Accuracy (ACDCV Function

Chapter 1 3458A Calibration Introduction 7Chapter 1 3458A Calibration IntroductionIntroductionThis manual provides operation verification procedu

88 Appendix A Specifications High Frequency Temperature CoefficientFor outside Tcal ±5°C add the following error.(% of Reading)/°CAnalog Mode (ACV F

Appendix A Specifications 89Reading Rates 1Settling CharacteristicsFor first reading or range change error using default delays, add .01% of input s

90 Appendix A Specifications AC + DCV Accuracy (ACDCV Function)For ACDCV Accuracy apply the following additional error to the ACV accuracy. (% of Ra

Appendix A Specifications 915 / AC CurrentAC Current (ACI and ACDCI Functions)AC Accuracy 224 Hour to 2 Year (% Reading + % Range)AC + DC Accuracy (

92 Appendix A Specifications Settling CharacteristicsFor first reading or range change error using default delays, add .01% of input step additional

Appendix A Specifications 937 / Digitizing SpecificationsGeneral InformationThe 3458A supports three independent methods for signal digitizing. Eac

94 Appendix A Specifications Dynamic Performance100 mV, 1 V, 10 V Ranges; Aperture = 6 µsDirect and Sub-sampled Digitizing (DSDC, DSAC, SSDC and SSA

Appendix A Specifications 958 / System SpecificationsFunction-Range-MeasurementThe time required to program via GPIB a new measurement configuratio

96 Appendix A Specifications 9 / RatioType of Ratio 1Accuracy10 / Math FunctionsGeneral Math Function SpecificationsMath is executable as either a re

Appendix A Specifications 9711 / General SpecificationsOperating EnvironmentTemperature Range: 0°C to 55°COperating Location: Indoor Use OnlyOperati