Keysight Truevolt Series Service manual

Operating and
Service Guide
Keysight Truevolt Series
Digital Multimeters

Notice: This document contains references to Agilent Tech-
nologies. Agilent's former Test and Measurement business
has become Keysight Technologies. For more information,
go to www.keysight.com.

Safety and Regulatory Information 11
Notices 11
Manual Information 11
Software Revision 11
Warranty 11
Technology Licenses 11
Restricted Rights Legend 12
Safety Notices 13
Safety Symbols 13
Safety Information 14
General 14
Measurement Limits 16
Input Terminal Measurement Limits 18
Sense Terminal Measurement Limits 18
IEC Measurement Category II 19
Keysight 34138A Test Lead Set 19
Test Lead Ratings 19
Operation 19
Maintenance 19
Declaration of Conformity 20
Welcome 21
Introductory Information 21
User Information 21
SCPI Programming Reference 22
Service and Repair 22
Performance Verification 22
Calibration Procedures 22
Introduction to the Instrument 23
Instrument at a Glance 23
Display – Easily display, save and document your measurement results 23
Measurements – Keysight’s Truevolt measurement performance with modern I/O accessibility 23
Programming Language 23
Front Panel at a Glance 24
Front Panel Keys 24
Rear Panel at a Glance 25
Models and Options 26
Options Installed at Factory 26
Options Installed by Distributor or End Customer 26
Remote Interface Configuration 27
Connectivity Software 27
GPIB Configuration 27
LAN Configuration 28
Web Interface 31
LAN Configuration Procedure 32
More about IP Addresses and Dot Notation 33
Firmware Update 34
Contacting Keysight Technologies 35
Quick Start 36
Prepare Instrument for Use 36
Setting the AC Mains Line Voltage Selector and Fuse Installation 37
Connect Power and I/O Cables 39
4Keysight Truevolt Series Operating and Service Guide

Adjust the Carrying Handle 40
Use Built-in Help System 41
View the help information for a front panel key 41
View the list of help topics and use interactive demos 42
View the list of recent instrument errors. 43
View the help information for displayed messages. 43
Rack Mount the Instrument 44
Removing the Handle and Bumpers 44
Rack Mounting a Single Instrument 44
Rack Mounting Instruments Side-by-Side 44
Sliding Support Shelf 45
Features and Functions 46
Continuous, Data Log, and Digitize Modes 47
Continuous Mode 47
Data Log Mode 47
Digitize Mode 47
Data Log and Digitize Mode Default Settings 48
Additional Data Log Default Settings 48
Additional Digitize Default Settings 49
Front Panel Menu Reference 50
[Acquire] key 54
[Math] key 54
[Display] key 54
[Utility] key 55
Measurements 56
DC Voltage 57
AC Voltage 60
DC Current 62
AC Current 64
Resistance 66
Temperature (34460A and 34461A) 69
Temperature (34465A and 34470A) 71
Capacitance 76
Continuity 77
Diode 78
Frequency and Period 79
Data Logging 81
Digitizing 86
Level Triggering 91
Secondary Measurements 93
Triggering and Readings 95
Instrument trigger model 95
Trigger delay and multiple samples 97
Storing and clearing readings 98
Probe Hold 100
Math - Introduction 101
Math - Null 102
Math - dB/dBm Scaling 103
Math - Scaling 105
Math - Smoothing 108
Math - Statistics 109
Math - Limits 110
Keysight Truevolt Series Operating and Service Guide 5

Display - Introduction 114
Selecting the Display 114
Number 116
Bar Meter 121
Trend Chart (Continuous Measurement Mode) 124
Trend Chart (Digitize and Data Log Modes) 127
Histogram 133
Utility Menu - Introduction 138
Utility - Autocalibration (34465A/70A only) 139
Utility - Store and Recall State and Preference Files 140
Utility Menu - Manage Files 142
Utility Menu - I/O Configuration 144
Utility Menu - Test/Admin 147
Utility Menu - System Setup 149
Web Interface 152
Welcome Page 152
Instrument Monitor and Control Page 153
Configuration Page 157
Help 158
Measurement Tutorial 159
Measurement Considerations 160
Metrology 161
DC Measurement Considerations 162
Thermal EMF Errors 162
Loading Errors (DC Voltage) 162
Noise Rejection 163
Rejecting Power–Line Noise Voltages 163
Common Mode Rejection (CMR) 163
Noise Caused by Magnetic Loops 163
Noise Caused by Ground Loops 164
Resistance Measurement Considerations 165
Removing Test Lead Resistance Errors 165
Minimizing Power Dissipation Effects 166
Errors in High Resistance Measurements 166
True RMS AC Measurements 167
True RMS Accuracy and High–Frequency Signal Content 168
Estimating High–Frequency (Out–of–Band) Error 169
Other Primary Measurement Functions 171
Frequency and Period Measurement Errors 171
DC Current 171
Temperature Measurements 172
NULL Reading 173
Autozero On/Off 173
Making High–Speed AC Measurements 173
Making High–Speed DC and Resistance Measurements 174
Capacitance 175
Capacitance Measurement Considerations 176
Digitizing Measurements 177
The Sampling Rate 177
Level Triggering 178
About Digitize Mode 178
Data Log and Digitizing Local Remote Interaction 180
6Keysight Truevolt Series Operating and Service Guide

Data Log Mode 181
Data Log Mode Features 181
Data Logging and the Trend Chart Display 185
Data Log and Digitizing Local Remote Interaction 186
Level Triggering 187
About Level Trigger 187
Other Sources of Measurement Error 189
Settling Time Effects 189
Loading Errors (AC volts) 189
Measurements Below Full Scale 190
High-Voltage Self-Heating Errors 190
AC Current Measurement Errors (Burden Voltage) 190
Low–Level Measurement Errors 191
Common Mode Errors 191
Leakage Current Errors 192
Unnecessary Signal Errors 192
How Sample Rate/Interval is Determined 193
SCPI Programming Reference 194
Related Information 194
IO Libraries and Instrument Drivers 194
Keysight Truevolt Series Documentation 194
Web Interface 194
Introduction to the SCPI Language 195
Syntax Conventions 195
Command Separators 196
Using the MIN, MAX and DEF Parameters 196
Querying Parameter Settings 196
SCPI Command Terminators 197
IEEE-488.2 Common Commands 197
SCPI Parameter Types 197
Using Device Clear 199
Commands by Subsystem 199
ABORt 201
FETCh? 202
INITiate[:IMMediate] 203
OUTPut:TRIGger:SLOPe {POSitive|NEGative}OUTPut:TRIGger:SLOPe? 204
R? [<max_readings>] 205
READ? 206
ROUTe:TERMinals? 207
TEST:ALL? 208
UNIT:TEMPerature {C|F|K}UNIT:TEMPerature? 209
CALCulate Subsystem Introduction 210
CALibration Subsystem 237
CONFigure Subsystem 243
DATA Subsystem 256
DISPlay Subsystem 259
FORMat Subsystem 261
HCOPy Subsystem 263
IEEE 488.2 Common Commands 264
LXI Subsystem 277
MEASure Subsystem 280
MMEMory Subsystem - General Purpose File Management 291
Keysight Truevolt Series Operating and Service Guide 7

MMEMory Subsystem - STATe and PREFerence Files 296
MMEMory Subsystem - Data Transfer Commands 301
SAMPle Subsystem 306
SENSe Subsystem Introduction 313
STATus Subsystem 386
SYSTem Subsystem - General Purpose Commands 392
SYSTem Subsystem - I/O Configuration 405
SYSTem Subsystem LOCK Commands 419
SYSTem Subsystem LICense Commands 422
TRIGger Subsystem 427
Command Quick Reference 434
Configuration Commands 434
Measurement Commands 434
Measurement Configuration Commands 434
Sample Commands 441
Triggering Commands 441
Calculation (Math) Commands 442
Reading Memory Commands 444
Calibration Commands 445
State Storage and Preferences Commands 445
General Purpose File Management Commands 446
Data Transfer Commands 447
IEEE-488 Commands 447
Format Subsystem 448
System-Related Commands 448
Interface Locking Commands 449
License Management Commands 450
Interface Configuration Commands 450
Status System Commands 451
Range, Resolution and Integration Time (shown in Aperture and NPLCs) 452
Resolution and Integration Time for DC Measurements 455
Automatic Trigger Delays 456
DC Voltage Default Delays 456
DC Current Default Delays 456
Resistance (2-wire) Default Delays 457
Resistance (4-wire) Default Delays 457
AC Voltage Default Delays 457
AC Current Default Delays 458
Frequency and Period 458
VM Comp Output (BNC) 459
SCPI Error Messages 460
Command Errors (-100…) 462
Execution Errors (-200…) 464
Device-Specific Errors (-300…) 467
Query Errors (-400…) 467
Network Errors (+100...) 467
Instrument Errors (+200…) 468
Miscellaneous Errors (+300... and +500..) 468
Licensing and Self-test Errors (+600...) 469
Calibration Errors (+700...) 471
Miscellaneous Errors (+800...) 473
Power-On and Reset State 474
Factory Default Settings 474
8Keysight Truevolt Series Operating and Service Guide

Service and Repair 477
Types of Service Available 477
Obtaining Repair Service (Worldwide) 477
Repackaging for Shipment 478
Cleaning 478
Electrostatic Discharge (ESD) Precautions 478
Power Supplies 479
Troubleshooting 482
Troubleshooting Procedure 483
Self-Test Procedures 486
Power-On Self-Test 486
Full Self-Test 486
User Replaceable Parts 487
Disassembly 488
Tools Required 488
General Disassembly Procedure 489
Battery Replacement 492
Tools Required 492
Procedure 493
3 A and 10 A Current Path Fuse Replacement 494
Tools Required 494
Testing the Fuses 495
Internal Fuse Replacement Procedure 496
Installing the Optional GPIB Interface 497
Tools Required 497
Installation Procedure 497
Retain GPIB Cover Plate 497
Security Code Override 499
Which Procedure Should I Use? 499
Procedure A: For Firmware Revision Ending in 02, or Greater 500
Procedure B: For Firmware Revision Ending in 01 502
Performance Verification 503
Quick Performance Check 504
Performance Verification Tests 505
Recommended Test Equipment 505
Zero Offset Verification 506
DC Volts and DC Current Gain Verification 510
Frequency Accuracy Verification 515
AC Voltage and AC Current Verification 516
High Current Verification 521
Capacitance Verification (Optional Verification Test) 522
Calibration Adjustment Procedures 523
Calibration Procedures 524
Input Connections 525
Test Considerations 525
Recommended Test Equipment 526
Calibration Adjustment Process 527
Gain Calibration Adjustment Overview 528
Gain and Flatness Calibration Adjustment Overview 529
Entering Calibration Values and Storing Calibration Constants 530
Calibration Security 531
Keysight Truevolt Series Operating and Service Guide 9

Calibration Message 532
Calibration Count 533
Aborting a Calibration in Progress 534
Security Code Override 535
34460A and 34461A Calibration Procedures 540
ADC and Zero Calibration 541
AC Voltage Low Frequency Gain and Flatness Calibration 543
AC Voltage Gain and Flatness Calibration 544
AC Current Gain and Flatness Calibration 545
AC Zero Calibration 546
Frequency Accuracy Calibration 547
DC Voltage Gain Calibration 548
Ohms Gain Calibration 549
DC Current Gain Calibration 550
AC Current 10 A Gain Calibration 551
DC Current 10 A Gain Calibration 552
Capacitance Offset Calibration (Optional) 553
Finishing Calibration 554
34465A and 34470A Calibration Procedures 555
ADC and Zero Calibration 556
AC Voltage Low Frequency Gain and Flatness Calibration 558
AC Voltage Gain and Flatness Calibration 559
AC Current Gain and Flatness Calibration 560
AC Zero Calibration 561
Frequency Accuracy Calibration 562
DC Voltage Gain Calibration 563
Ohms Gain Calibration 564
DC Current Gain Calibration 565
DC High Voltage Gain Calibration 566
AC Current 10 A Gain Calibration 567
DC Current 10 A Gain Calibration 568
Capacitance Offset Calibration (Optional) 569
Finishing Calibration 570
Index 571
10 Keysight Truevolt Series Operating and Service Guide

Safety and Regulatory Information
Notices
© Keysight Technologies, Inc. 2013 - 2018
No part of this manual may be reproduced in any form or by any means (including electronic storage and
retrieval or translation into a foreign language) without prior agreement and written consent from Key-
sight Technologies, Inc. as governed by United States and international copyright laws.
Manual Information
Part Number: 34460-90901, Edition 6, ( November 27, 2018)
Keysight Technologies, Inc.
900 S. Taft Ave.
Loveland, CO 80537 USA
Software Revision
For the latest firmware, go to the product page at www.keysight.com/find/truevolt.
The latest product documentation is available at www.keysight.com/find/truevolt-doc. For doc-
umentation for mobile devices, see www.keysight.com/find/truevolt-mobilehelp.
A portion of the software in this product is licensed under terms of the General Public License Version 2
("GPLv2"). The text of the license and source code can be found at www.keysight.com/find/GPLV2.
This product uses Microsoft Windows CE. Keysight highly recommends that all Windows-based com-
puters connected to Windows CE instruments use current anti-virus software. For more information, see
www.keysight.com/find/truevolt.
Warranty
The material contained in this document is provided "as is," and is subject to being changed, without
notice, in future editions. Further, to the maximum extent permitted by applicable law, Keysight disclaims
all warranties, either express or implied, with regard to this manual and any information contained herein,
including but not limited to the implied warranties of merchantability and fitness for a particular purpose.
Keysight shall not be liable for errors or for incidental or consequential damages in connection with the fur-
nishing, use, or performance of this document or of any information contained herein. Should Keysight
and the user have a separate written agreement with warranty terms covering the material in this doc-
ument that conflict with these terms, the warranty terms in the separate agreement shall control.
Technology Licenses
The hardware and/or software described in this document are furnished under a license and may be used
or copied only in accordance with the terms of such license.
Keysight Truevolt Series Operating and Service Guide 11
Safety and Regulatory Information

Restricted Rights Legend
U.S. Government Restricted Rights. Software and technical data rights granted to the federal government
include only those rights customarily provided to end user customers. Keysight provides this customary
commercial license in Software and technical data pursuant to FAR 12.211 (Technical Data) and 12.212
(Computer Software) and, for the Department of Defense, DFARS 252.227-7015 (Technical Data – Com-
mercial Items) and DFARS 227.7202-3 (Rights in Commercial Computer Software or Computer Software
Documentation).
Safety and Regulatory Information
12 Keysight Truevolt Series Operating and Service Guide

Safety Notices
A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that,
if not correctly performed or adhered to, could result in damage to the product or loss of important data.
Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met.
A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like
that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed bey-
ond a WARNING notice until the indicated conditions are fully understood and met.
Safety Symbols
Alternating current
Frame or chassis terminal
Standby supply. Unit is not completely disconnected from AC mains power when switch is off.
Risk of electric shock
Refer to accompanying documents
The CE mark is a registered trademark of the European Community.
The CSA mark with the 'c' and 'us' subscript indicates the instrument is certified to the applic-
able Canadian and United States of America standards respectively.
CAT II
(300V)
IEC Measurement Category II. Inputs may be connected to AC mains power (up to 300 VAC)
under Category II overvoltage conditions.
This product is marked with the ACMA RCM mark for compliance in Australia / New Zealand. A
copy of the Manufacturer’s Australia Declaration of Conformity for this instrument can be
obtained by contacting your local Keysight Technologies Sales Representative.
ISM 1-A This text indicates that the instrument is an Industrial Scientific and Medical Group 1 Class A product
(CISPR 11, Clause 4).
ICES/NMB-
001
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est conforme à la norme NMB-001 du Canada.
Keysight Truevolt Series Operating and Service Guide 13
Safety and Regulatory Information

This product complies with the WEEE Directive (2002/96/EC) marking equipment. The affixed
product label indicates that you must not discard this electrical/electronic product in
domestic household waste.
To return unwanted products, contact your local Keysight office, or see www.key-
sight.com/environment/product/ for more information.
This equipment is Class A suitable for professional use and is for use in electromagnetic envir-
onments outside of the home.
Contains one or more of the 6 hazardous substances above the maximum concentration value (MCV), 40
Year EPUP.
Safety Information
General
Do not use this product in any manner not specified by the manufacturer. The protective features of this
product may be impaired if it is used in a manner not specified in the operation instructions. Do not install
substitute parts or perform any unauthorized modification to the product. Return the product to a Key-
sight Technologies Sales and Service Office for service and repair to ensure that safety features are main-
tained.
Product Grounding
The instrument is a Class 1 product and is provided with a grounding-type power cord set. The instru-
ment chassis and cover are connected to the instrument electrical ground to minimize shock hazard.
The ground pin of the cord set plug must be firmly connected to the electrical ground (safety ground)
terminal at the power outlet. Any interruption of the protective earth (grounding) conductor or dis-
connection of the protective earth terminal will cause a potential shock hazard that could result in per-
sonal injury or death.
Cleaning
To prevent electrical shock, disconnect the instrument from AC mains power and disconnect all test
leads before cleaning. Clean the outside of the instrument using a soft, lint-free, cloth slightly
dampened with water.Do not use detergent or solvents.Do not attempt to clean internally.If needed,
contact a Keysight Technologies Sales and Service office to arrange for proper cleaning to ensure
that safety features and performance are maintained.
AC Power Cord
Removal of the AC power cord is the disconnect method to remove power from the instrument. Be
sure to allow for adequate access to the power cord to permit disconnection from AC power. Use
only the Keysight specified power cord for the country of use or one with equivalent ratings.
Safety and Regulatory Information
14 Keysight Truevolt Series Operating and Service Guide

Do Not Remove Instrument Cover
Only qualified, service-trained personnel should remove the cover from the instrument. Service:
Unplug instrument from wall outlet, remove power cord, and remove all probes from all terminals
before servicing.
AC Mains Power Line Fuse
For continued protection against fire, replace the line fuse only with fuses of the specified type and rat-
ing. The instrument must be disconnected from AC mains power, and all measurement terminals
must be disconnected before changing the fuse.
Current Measurement Protection Fuse
For continued protection against fire, replace current-protection fuses only with fuses of the specified
type and rating. The instrument must be disconnected from AC mains power, and all measurement ter-
minals must be disconnected before changing the fuse.
Front/Rear Switch
Do not change the position of the Front/Rear switch on the front panel while signals are present on
either the front or rear set of terminals. The switch is not intended as an active multiplexer. Switching
while current or high voltage is present may cause instrument damage and lead to the risk of electric
shock.
Do Not Operate in an Explosive Atmosphere
This instrument is not designed to be operated in an explosive environment. The instrument enclosure
complies with the IP 20 rating.
In Case of Damage
An instrument that appears damaged or defective should be made inoperative and secured against
unintended operation until qualified service personnel can repair it.
Self-Test
Before measuring any hazardous voltage or current, remove all test leads to the instrument, run the
TEST:ALL? query from the remote interface, and read the result to verify that the instrument is per-
forming properly.
The TEST:ALL? query is a self-test that returns +0 if the instrument passes and +1 if the instrument
fails. You can also perform this query from the front panel by pressing [Shift] > [Utility] > Test/Admin >
Self Test > Full Test. If this self-test fails, make sure that the instrument is repaired and passes the
complete self-test before continuing.
Measuring AC Power Mains
The HI, LO, and current input terminals may be connected to AC mains power in IEC Category II install-
ations for line voltages up to 300 VAC. To avoid the danger of electric shock, do not connect the inputs
to AC mains power for line voltages above 300 VAC. See IEC Measurement Category II for further
information.
Keysight Truevolt Series Operating and Service Guide 15
Safety and Regulatory Information

Measuring Current with A Current Transformer
If a current transformer is used for measuring current, you must use a current transformer with
internal secondary protection. Using a current transformer without protection may result in a haz-
ardous voltage resulting in a severe shock or death. In addition, this may cause damage to the instru-
ment.
Crest Factor
Exceeding the crest factor limit may result in an inaccurate or lower reading display. Do not exceed
the crest factor limit to avoid instrument damage and risk of electric shock. The crest factor limit is lis-
ted in the product data sheet at www.keysight.com/find/truevolt-doc.
Measurement Limits
To avoid instrument damage and the risk of electric shock, do not exceed any of the Measurement Lim-
its defined in the following section.
This product complies with EN/IEC 61326-2-1, for sensitive test and measurement equip-
ment:
When subjected to transient radiated and/or conducted electromagnetic phenomena, the
product may have temporary loss of function or performance which is self-recovering. Recov-
ery may take longer than 10 seconds.
When subjected to continuously present electromagnetic phenomena, some degradation of
performance may occur.
Unless otherwise noted in the specifications, this instrument or system is intended for indoor
use in an installation category II, pollution degree 2 environment per IEC 61010-1 and 664
respectively. It is designed to operate at a maximum relative humidity of 5% to 80% at 40 °C or
less (non-condensing). This instrument or system is designed to operate at altitudes up to
3000 meters, and at temperatures between 0 and 55 °C.
Measurement Limits
The Truevolt Series DMMs provide protection circuitry to prevent damage to the instrument and to protect
against the danger of electric shock, provided the Measurement Limits are not exceeded. To ensure safe
operation of the instrument, do not exceed the Measurement Limits shown on the front and rear panel,
and defined as follows:
Safety and Regulatory Information
16 Keysight Truevolt Series Operating and Service Guide

34460A Front Panel
Terminal Area
34461A, 34465A, 34470A
Front Panel
Terminal Area
34461A, 34465A, 34470A
Rear Panel
Terminal Area
Keysight Truevolt Series Operating and Service Guide 17
Safety and Regulatory Information

For the 34461A, 34465A, and 34470A, the Front/Rear switch selects the terminal set to be
used. DO NOT operate this switch while signals are present on the front or rear terminals.
The user-replaceable 3 A current-protection fuse is on the rear panel. There are 3 A and 10 A
(34461A, 34465A and 34470A) current-protection fuses located inside the unit. Contact your
Keysight Sales and Service Center or refer to product service documentation for replacement
instructions.
To maintain protection, replace fuses only with fuses of the specified type and rating.
Input Terminal Measurement Limits
Measurement Limits are defined for the input terminals:
Main Input (HI and LO) Terminals. The HI and LO input terminals are used for voltage, resistance, fre-
quency (period), capacitance, and diode test measurements. Two Measurement Limits are defined for
these terminals:
lHI to LO Measurement Limit. The Measurement Limit from HI to LO (Input terminals) is 1000 VDC or
750 VAC, which is also the maximum voltage measurement. This limit can also be expressed as 1000
Vpk maximum.
lLO to Ground Measurement Limit. The LO input terminal can safely "float" a maximum of 500 Vpk
relative to ground, where ground is defined as the Protective Earth Conductor in the AC mains power
cord connected to the instrument.
As implied by the above limits, the Measurement Limit for the HI input terminal is a maximum of 1500 Vpk
relative to ground when LO is at its maximum of 500 Vpk relative to ground.
Current Input Terminal. The current input ("I") terminal has a Measurement Limit of 3 A or 10 A (DC or
AC) between the "I" terminal (3 A or 10 A) and the LO input terminal. Note that the current input terminals
will always be at approximately the same voltage as the LO terminal, unless a current protection fuse is
open. The 10 A terminal is not available on the 34460A.
Sense Terminal Measurement Limits
The HI and LO sense terminals are used for DCV ratio measurements and four-wire resistance and tem-
perature measurements. The Measurement Limit is 200 Vpk for all of the terminal pairings: LO sense to LO
input, HI sense to LO input, and HI sense to LO sense.
The 200 Vpk limit on the sense terminals is the Measurement Limit. Operational voltages in resistance meas-
urements are much lower – up to ± 12 V in normal operation.
Safety and Regulatory Information
18 Keysight Truevolt Series Operating and Service Guide

IEC Measurement Category II
To protect against the danger of electric shock, the Keysight Truevolt Series DMM protects the user from
AC mains power overvoltage events. When measuring AC mains, the HI and LO input terminals may be
connected to AC mains power up to 300 VAC under Measurement Category II conditions as defined
below.
IEC Measurement Category II includes electrical devices connected to AC mains power at an outlet on a
branch circuit. Such devices include most small appliances, test equipment, and other devices that plug
into a branch outlet or socket. The instrument may be used to make measurements with the HI and LO
inputs connected to AC mains power in such devices, or to the branch outlet itself (up to 300 VAC).
However, the instrument may not be used with its HI and LO inputs connected to AC mains power in per-
manently installed electrical devices such as the main circuit-breaker panel, sub-panel disconnect boxes,
or permanently wired motors. Such devices and circuits are subject to overvoltages that may exceed the
instrument’s protection capabilities.
Voltages above 300 VAC may be measured only in circuits that are isolated from AC mains power. However,
transient overvoltages are also present on circuits that are isolated from ACmains power. The instrument is
designed to safely withstand occasional transient overvoltages up to 1500 Vpk when measuring voltages
greater than 300 VAC. Do not use this equipment to measure circuits where transient overvoltages could
exceed this level.
Keysight 34138A Test Lead Set
The Keysight 34138A Test Lead Set, described below, is compatible with the Truevolt Series DMMs.
Test Lead Ratings
lTest Leads - 1000V, 15A
lFine Tip Probe Attachments - 300V
l3A Mini Grabber Attachment - 300V, 3A
lSMT Grabber Attachments - 300V, 3A
Operation
The Fine Tip, Mini Grabber, and SMT Grabber attachments plug onto the probe end of the Test Leads.
Maintenance
If any portion of the Test Lead Set is worn or damaged, do not use. Replace with a new Keysight 34138A
Test Lead Set.
If the Test Lead Set is used in a manner not specified by Keysight Technologies, the protection
provided by the Test Lead Set may be impaired. Also, do not use a damaged or worn Test Lead Set. Per-
sonal injury or death may result.
Keysight Truevolt Series Operating and Service Guide 19
Safety and Regulatory Information

Declaration of Conformity
Declarations of Conformity for this product and for other Keysight products may be downloaded from the
Keysight Regulatory Web site:
http://regulations.products.keysight.com/DoC/search.htm
Safety and Regulatory Information
20 Keysight Truevolt Series Operating and Service Guide

Welcome
This Operating and Service Guide contains information for using, programming, and servicing the Keysight
Truevolt Series Digital Multimeters (DMMs). If you have feedback on this document, please go to www.key-
sight.com/find/truevolt-docfeedback.
Introductory Information
Safety and Regulatory Information
Models and Options
Quick Start
Contacting Keysight Technologies
Introduction to the Instrument
User Information
Front Panel Menu Reference
Features and Functions
Remote Interface Configuration
LAN Configuration Procedure
Web Interface
Measurements
Triggering and Readings
Probe Hold
Math
Display
Utility Menu
Measurement Tutorial
Keysight Truevolt Series Operating and Service Guide 21
Welcome