Keysight U1211A, U1212A, and U1213A Clamp Meters
User’s and Service Guide
Notices
CAUTION
WARNING
Copyright Notice
© Keysight Technologies 2009–2017
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
Keysight Technologies as governed by
United States and international
copyright laws.
Manual Part Number
U1211-90001
Edition
Edition 16, June 30, 2017
Printed in:
Printed in Malaysia
Published by:
Keysight Technologies
Bayan Lepas Free Industrial Zone,
11900 Penang, Malaysia
Technology Licenses
The hard ware 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.
Declaration of Conformity
Declarations of Conformity for this
product and for other Keysight
products may be downloaded from the
Web. Go to http://www.keysight.com/
go/conformity. You can then search by
product number to find the latest
Declaration of Conformity.
U.S. Government Rights
The Software is “commercial computer
software,” as defined by Federal
Acquisition Regulation (“FAR”) 2.101.
Pursuant to FAR 12.212 and 27.405-3
and Department of Defense FAR
Supplement (“DFARS”) 227.7202, the
U.S. government acquires commercial
computer software under the same
terms by which the software is
customarily provided to the public.
Accordingly, Keysight provides the
Software to U.S. government
customers under its standard
commercial license, which is embodied
in its End User License Agreement
(EULA), a copy of which can be found
at http://www.keysight.com/find/
sweula. The license set forth in the
EULA represents the exclusive authority
by which the U.S. government may use,
modify, distribute, or disclose the
Software. The EULA and the license set
forth therein, does not require or
permit, among other things, that
Keysight: (1) Furnish technical
information related to commercial
computer software or commercial
computer software documentation that
is not customarily provided to the
public; or (2) Relinquish to, or
otherwise provide, the government
rights in excess of these rights
customarily provided to the public to
use, modify, reproduce, release,
perform, display, or disclose
commercial computer software or
commercial computer software
documentation. No additional
government requirements beyond
those set forth in the EULA shall apply,
except to the extent that those terms,
rights, or licenses are explicitly required
from all providers of commercial
computer software pursuant to the FAR
and the DFARS and are set forth
specifically in writing elsewhere in the
EULA. Keysight shall be under no
obligation to update, revise or
otherwise modify the Software. With
respect to any technical data as
defined by FAR 2.101, pursuant to FAR
12.211 and 27.404.2 and DFARS
227.7102, the U.S. government
acquires no greater than Limited Rights
as defined in FAR 27.401 or DFAR
227.7103-5 (c), as applicable in any
technical data.
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
FURNISHING, 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
DOCUMENT THAT CONFLICT WITH
THESE TERMS, THE WARRANTY TERMS
IN THE SEPARATE AGREEMENT SHALL
CONTROL.
Safety Information
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 beyond a WARNING
notice until the indicated conditions are
fully understood and met.
2 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Safety Symbols
CAT III
CAT IV
600 V
The following symbols on the instrument and in the documentation indicate
precautions that must be taken to maintain safe operation of the instrument.
Direct current (DC) Caution, risk of electric shock
Alternating current (AC)
Earth (ground) terminal
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Equipment protected throughout by
double insulation or reinforced
insulation
Category III 1000 V overvoltage
protection
Category IV 600 V overvoltage
protection
Application around and removal from
HAZARDOUS LIVE conductors is
permitted
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 3
General Safety Information
WARNING
– Do not exceed any of the measurement limits defined in the specifications
to avoid instrument damage and the risk of electric shock.
– When working above 30 V
range poses a shock hazard.
– Do not measure more than the rated current and voltage (as marked on
the clamp meter).
– Ensure the test leads are disconnected from the input terminals when
measuring current with the clamp meter. Keep your fingers behind the
hand guard when performing measurements.
– When connecting probes, always connect the common test probe first.
When disconnecting probes, always disconnect the live test probe first.
– Detach test probes from the clamp meter before you open the battery
cover.
– Do not use the clamp meter with the battery cover or part of the cover
removed or loose.
– Replace the battery as soon as the low battery indicator is shown on the
annunciator display. This is to avoid false readings, which may lead to
possible electric shock or personal injury.
– When measuring temperature, keep the thermocouple probe as close to
the meter as possible, and avoid contact with surface above 30 V
or 60 V
– Do not operate the product in an explosive atmosphere or in the presence
of flammable gases or fumes.
– Inspect the case for cracks or missing plastic. Pay extra attention to the
insulation surrounding the connectors. Do not use the clamp meter if it is
damaged.
– Inspect the test probes for damaged insulation or exposed metal, and
check for continuity. Do not use the test probe if it is damaged.
– Do not service or perform adjustments alone. Under certain condition,
hazardous voltages may exist, even with the equipment switched off. To
avoid dangerous electric shock, service personnel must not attempt
internal service or adjustment unless another person, capable of
rendering resuscitation or first aid, is present.
as this will pose shock hazard.
DC
RMS or 60 VDC, exercise caution – such
AC
AC
RMS
4 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
WARNING
– Do not substitute parts or modify equipment to avoid the danger of
CAUTION
introducing add itional hazards. Return the product to the nearest
Keysight Technologies Sales and Service office for service and repair to
ensure the safety features are maintained.
– Do not operate damaged equipment as the safety protection features
built into this product may have been impaired, either through physical
damage, excessive moisture, or any other reason. Remove power and do
not use the product until safe operation can be verified by service-trained
personnel. If necessary, return the product to the nearest Keysight
Technologies Sales and Service office for service and repair to ensure the
safety features are maintained.
– Turn off circuit power and discharge all high-voltage capacitors in the
circuit before you perform resistance and capacitance measurements or
continuity and diode tests.
– Use the correct terminals, function, and range for your measurements.
– Never measure voltage when current measurement is selected.
– Use only the recommended battery type. Ensure proper insertion of
battery in the clamp meter, and follow the correct polarity.
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 5
Use the clamp meter only as specified in this guide. Otherwise, the protection
provided by the clamp meter may be impaired.
Measurement Category
The Keysight U1211A, U1212A, and U1213A has a safety rating of CAT III,
1000 V and CAT IV, 600 V.
Measurement CAT I Measurements performed on circuits not directly
connected to the AC mains. Examples are measurements on circuits not derived
from the AC mains and specially protected (internal) mains-derived circuits.
Measurement CAT II Measurements performed on circuits directly connected
to a low-voltage installation. Examples are measurements on household
appliances, portable tools, and similar equipment.
Measurement CAT III Measurements performed in the building installation.
Examples are measurements on distribution boards, circuit- breakers, wiring,
including cables, bus-bars, junction boxes, switches, socket outlets in the fixed
installation, and equipment for industrial use, and some other equipment
including stationary motors with permanent connection to the fixed installation.
Measurement CAT IV Measurements performed at the source of the
low-voltage installation. Examples are electricity meters and measurements on
primary overcurrent protection devices and ripple control units.
6 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Environmental Conditions
This instrument is designed for indoor use and in an area with low condensation.
The table below shows the general environmental requirements for this
instrument.
Environmental conditions Requirements
Operating temperature –10 °C to 50 °C
Relative humidity
Altitude (operating) 2000 meters
Storage temperature –20 °C to 60 °C
Storage humidity 0% to 80% RH non-condensing
Maximum 80% RH for temperature up to 31 °C decreasing linearly
to 50% RH at 50 °C
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 7
Regulatory Markings
The CE mark is a registered
trademark of the European
Community. This CE mark shows that
the product complies with all the
relevant European Legal Directives.
The CSA mark is a registered
trademark of the Canadian Standards
Association.
ICES/NMB-001 indicates that this
ISM device complies with the
Canadian ICES-001.
Cet appareil ISM est conforme a la
norme NMB-001 du Canada.
The RCM mark is a registered
trademark of the Spectrum
Management Agency of Australia.
This signifies compliance with the
Australia EMC Framework regulations
under the terms of the Radio
Communication Act of 1992.
This symbol indicates the time period
during which no hazardous or toxic
substance elements are expected to
leak or deteriorate during normal use.
Forty years is the expected useful life
of the product.
This instrument complies with the
WEEE Directive (2002/96/EC)
marking requirement. This affixed
product label indicates that you must
not discard this electrical or
electronic product in domestic
household waste.
8 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
This instrument complies with the WEEE Directive (2002/96/EC) marking
requirement. This affixed product label indicates that you must not discard this
electrical or electronic product in domestic household waste.
Product category
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
To return this unwanted instrument, contact your nearest Keysight Service Center,
or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml
for more information.
Sales and Technical Support
To contact Keysight for sales and technical support, refer to the support links on
the following Keysight websites:
– www.keysight.com/find/clampmeter
(product-specific information and support, software and documentation
updates)
– www.keysight.com/find/assist
(worldwide contact information for repair and service)
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 9
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10 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Table of Contents
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
General Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Measurement Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Waste Electrical and Electronic Equipment (WEEE) Directive
2002/96/EC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Product category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1 Getting Started
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Standard purchase items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Product at a Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
The front panel at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
The annunciator display at a glance . . . . . . . . . . . . . . . . . . . . . . . . .24
The buttons at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
The rotary switch at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
The terminals at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
The clamp jaw at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
The rear panel at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
2 Making Measurements
Performing Current Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Performing Voltage Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Performing Resistance Measurement and Continuity Test . . . . . . . . . .40
Performing Diode Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Performing Capacitance Measurement . . . . . . . . . . . . . . . . . . . . . . . . .46
Performing Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . . .48
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 11
3 Functions and Features
Data Hold (Trigger Hold) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Enabling the data hold function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Refresh Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Enabling the refresh hold function . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Dynamic Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Enabling the dynamic recording mode . . . . . . . . . . . . . . . . . . . . . . . 56
1 ms Peak Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Enabling the 1 ms peak hold function . . . . . . . . . . . . . . . . . . . . . . . 59
Null (Relative) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Enabling the null operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
4 Changing the Default Settings
Selecting Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Default Factory Settings and Available Setting Options . . . . . . . . . . . . 66
Setting minimum frequency measurement . . . . . . . . . . . . . . . . . . . 68
Setting beep frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Setting Data Hold/Refresh Hold mode . . . . . . . . . . . . . . . . . . . . . . 70
Setting auto power-off mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Setting backlight power-on duration . . . . . . . . . . . . . . . . . . . . . . . . 72
Setting temperature unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Returning to default factory settings . . . . . . . . . . . . . . . . . . . . . . . . 75
5Maintenance
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Battery replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
To order replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
6 Performance Tests and Calibration
Calibration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Closed-case electronic calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Keysight Technologies calibration services . . . . . . . . . . . . . . . . . . . .84
Calibration Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Adjustment recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Basic Operating Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Testing the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Testing the backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Test Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Input connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Performance Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Functional tests (only for U1212A and U1213A) . . . . . . . . . . . . . . .94
Calibration Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
Unsecuring the instrument for calibration . . . . . . . . . . . . . . . . . . . .97
Adjustment Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Valid adjustment reference input values . . . . . . . . . . . . . . . . . . . . .101
Front Panel Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Calibration process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Adjustment procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Adjustment count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
7 Characteristics and Specifications
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 13
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14 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
List of Figures
Figure 1-1 Keysight U1211A, U1212A, and U1213A Clamp
Figure 1-2 Clamp meter front panel . . . . . . . . . . . . . . . . . . . . . . .23
Figure 1-3 LCD annunciator display with full segments
Figure 1-4 Hold/Max Min button . . . . . . . . . . . . . . . . . . . . . . . . . .27
Figure 1-5 Function and status buttons . . . . . . . . . . . . . . . . . . . .28
Figure 1-6 Clamp meter rotary switch . . . . . . . . . . . . . . . . . . . . . .30
Figure 1-7 Clamp meter terminal inputs . . . . . . . . . . . . . . . . . . . .31
Figure 1-8 Clamp jaw close and open state . . . . . . . . . . . . . . . . .32
Figure 1-9 Clamp meter rear panel . . . . . . . . . . . . . . . . . . . . . . . .33
Figure 2-1 Measuring current . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Figure 2-2 Measuring voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Figure 2-3 Measuring resistance . . . . . . . . . . . . . . . . . . . . . . . . . .41
Figure 2-4 Continuity test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Figure 2-5 Measuring diode (forward bias) . . . . . . . . . . . . . . . . . .44
Figure 2-6 Measuring diode (reverse bias) . . . . . . . . . . . . . . . . . .45
Figure 2-7 Measuring capacitance . . . . . . . . . . . . . . . . . . . . . . . .47
Figure 2-8 Measuring temperature . . . . . . . . . . . . . . . . . . . . . . . .49
Figure 3-1 Data hold operation . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Figure 3-2 Refresh hold operation . . . . . . . . . . . . . . . . . . . . . . . . .55
Figure 3-3 Dynamic recording mode . . . . . . . . . . . . . . . . . . . . . . .58
Figure 3-4 1 ms peak hold mode operation . . . . . . . . . . . . . . . . .60
Figure 3-5 Null (relative) mode operation . . . . . . . . . . . . . . . . . . .62
Figure 4-1 Setting the minimum frequency . . . . . . . . . . . . . . . . .68
Figure 4-2 Setting the beep frequency . . . . . . . . . . . . . . . . . . . . .69
Figure 4-3 Setting the data hold or refresh hold mode . . . . . . . .70
Figure 4-4 Setting the auto power-off duration . . . . . . . . . . . . . .71
Figure 4-5 Setting the backlight power-on duration . . . . . . . . . .72
Figure 4-6 Setting the temperature unit . . . . . . . . . . . . . . . . . . . .74
Figure 4-7 Reverting to default factory settings . . . . . . . . . . . . . .75
Figure 5-1 Replacing the battery in the clamp meter . . . . . . . . . .80
Figure 6-1 Full segments of annunciator display . . . . . . . . . . . . .87
Figure 6-2 Current performance verification test setup . . . . . . . .93
Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 15
Figure 6-3 Typical adjustment process flow . . . . . . . . . . . . . . . . 108
Figure 6-4 Displaying adjustment counts . . . . . . . . . . . . . . . . . . 114
16 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
List of Tables
Table 1-1 U1211A, U1212A, and U1213A annunciator display .24
Table 1-2 Analog bar-graph ranges . . . . . . . . . . . . . . . . . . . . . . .26
Table 1-3 Hold/Max Min button description . . . . . . . . . . . . . . . .27
Table 1-4 Terminal connections for different measurement
functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Table 4-1 Setup mode buttons operation . . . . . . . . . . . . . . . . . .64
Table 4-2 Default factory settings and available setting options
for each feature . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Table 5-1 Basic troubleshooting procedures . . . . . . . . . . . . . . . .81
Table 5-2 Replacement parts list . . . . . . . . . . . . . . . . . . . . . . . . .82
Table 6-1 Recommended test equipment . . . . . . . . . . . . . . . . . .86
Table 6-2 Performance verification tests . . . . . . . . . . . . . . . . . . .90
Table 6-3 DC current offset verification test . . . . . . . . . . . . . . . .94
Table 6-4 AC current balancing verification test . . . . . . . . . . . . .96
Table 6-5 U1211A valid adjustment reference input values . . .101
Table 6-6 U1212A valid adjustment reference input values . . .102
Table 6-7 U1213A valid adjustment reference input values . . .103
Table 6-8 U1211A list of adjustment items . . . . . . . . . . . . . . . .109
Table 6-9 U1212A list of adjustment items . . . . . . . . . . . . . . . .110
Table 6-10 U1213A list of adjustment items . . . . . . . . . . . . . . . .112
Table 6-11 Error codes and their respective meanings . . . . . . . .115
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 17
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18 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Keysight U1211A, U1212A, and U1213A Clamp Meters
User’s and Service Guide
1 Getting Started
Introduction 20
Initial Inspection 22
Product at a Glance 23
This chapter contains a brief introduction and description of the front panel,
display, buttons, and terminals on the Keysight U1211A, U1212A, and U1213A
Clamp Meters.
19
1 Getting Started
U1211A U1212A U1213A
Introduction
The Keysight U1211A, U1212A, and U1213A Clamp Meters are true RMS
handheld clamp meters that enables you to measure harmonic currents
accurately. Besides measuring current, the clamp meters are combined with
built-in multimeter measurement features to enable other measurements
associated to a multimeter.
All the clamp meter models are able to measure AC current, AC and DC voltage,
resistance, audible continuity, diode, capacitance, and frequency. The U1212A
has additional DC current and temperature measurement functions. The U1213A
has additional AC + DC current, AC + DC voltage, and duty cycle tests apart from
the additional measurement features from the U1212A.
Figure 1-1 Keysight U1211A, U1212A, and U1213A Clamp Meters
20 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Features
The key features of Keysight U1211A, U1212A, and U1213A Clamp Meters are:
– AC, DC, and AC+DC (for U1213A only) voltage and current measurements.
– True RMS measurement for both AC voltage (ACV) and AC current (ACA).
–Orange LED backlight.
– Resistance measurement up to 40 MΩ (for U1213A only).
– Capacitance measurement up to 4000 µF.
– Frequency measurement up to 200 kHz.
– 1 ms peak hold to capture in-rush voltage and current easily.
– Diode and audible continuity tests.
– K-type thermocouple for temperature measurement.
– Frequency and duty cycle measurements.
– Dynamic recording for min, max, and average readings.
– Data hold with manual trigger and null mode.
– Hand guard to prevent contact with conductors.
Getting Started 1
– Closed case calibration (except for U1212A and U1213A where open case
calibration is needed for balance adjustment).
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 21
1 Getting Started
Initial Inspection
When you first receive your instrument, inspect the unit for any obvious damage
such as broken terminals or cracks, dents, and scratches on the casing that may
occur during shipment.
If any damage is found, notify the nearest Keysight Sales Office immediately. The
front of this manual contains the warranty information.
Standard purchase items
Verify that you have received the following items with your unit. If anything is
missing or damaged, please contact the nearest Keysight Sales Office.
✔ Standard test leads with 4 mm probes
✔ Soft carrying case
✔ Keysight U1211A, U1212A, and U1213A Clamp Meter Quick Start Guide
✔ Certificate of Calibration
Keep the original packaging in case the clamp meter has to be returned to
Keysight in the future. If you return the clamp meter for service, attach a tag
identifying the owner and model number. Also, include a brief description of the
problem occurred.
22 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Product at a Glance
Jaw
markings
Clamp jaw
Hand guard
Handle
Annunciator
Black input
terminal
Red input
terminal
Hold/
Max Min
button
Rotary
switch
Front panel
Function
buttons
Getting Started 1
The front panel at a glance
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 23
Figure 1-2 Clamp meter front panel
1 Getting Started
The annunciator display at a glance
Figure 1-3 LCD annunciator display with full segments displayed
The U1211A, U1212A, and U1213A clamp meters annunciator display indicates
the measurement values, functions, and status of the clamp meter. To view the
full display (with all segments illuminated), press and hold Hold/Max Min while
rotating the rotary switch to ~A on the clamp meter. After you are done viewing
the full display, press and hold Hold/Max Min. again to resume normal operation.
Tab le 1- 1 U1211A, U1212A, and U1213A annunciator display
No. Annunciator Description
1 AUTO Auto ranging
2
3 DH Data hold
4 MAX AVG MIN Dynamic recording mode on present reading. MAX: maximum reading,
5 Direct current or voltage
6 Alternating current or voltage
Δ
Zeroing mode
MIN: minimum reading, AVG: average reading
24 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
Getting Started 1
Tab le 1-1 U1211A, U1212A, and U1213A annunciator d isplay (continued)
No. Annunciator Description
7 Capacitor measurement unit
8 Audible continuity indicator
9 A Current measurement unit
10 Low battery indicator when battery voltage drops below 6.0 V
11 V Voltage measurement unit
12 M k Ω Resistance measurement unit and range
13 Diode measurement indicator
14 % Duty cycle (for U1213A only)
15 kHz Frequency measurement unit
16 Secondary display (for frequency and duty cycle measurement, and temperature unit)
17 Analog bar-graph with scale indicator
18 Auto power-off enabled
19 Negative polarity
20 Primary display
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 25
1 Getting Started
Analog bar-graph
The analog bar-graph emulates the needle on an analog meter without displaying
the overshoot. When measuring peak or null adjustments and viewing
fast-changing inputs, the bar graph provides a useful indication because it has a
faster updating rate to cater for fast-response applications. The bar-graph is not
applicable for temperature measurement. A negative sign will be indicated
whenever a negative value is measured. Each segment of the analog bar-graph is
represented by a count of 100.
Tab le 1- 2 Analog bar-graph ranges
Measurement range Bar-graph display
0 to 1000
1000 to 2000
2000 to 3000
3000 to 4000
26 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
The buttons at a glance
The operation of each button is shown below. Pressing a key changes the current
operation, changes the status in the annunciator on the display, and generates a
button-click sound (a beep).
Using the Hold/Max Min button
Figure 1-4 Hold/Max Min button
The Hold/Max Min button on the clamp meter has two functions: data hold and
dynamic recording. See “Data Hold (Trigger Hold)” on page 52 and “Dynamic
Recording” on page 56 for more information.
Getting Started 1
Tab le 1-3 Hold/Max Min button description
Button Description
– Press Hold/Max Min momentarily to perform data hold operation. The annunciator display
will indicate DH, which means a reading has been freezed. Press and hold Hold/Max Min for
more than 1 second to disable data hold operation.
– Press Hold/Max Min for more than 1 second (with the data hold function turned off) to
perform dynamic recording mode. The annunciator display will first indicate MAX AVG MIN.
Press Hold/Max Min momentarily to cycle through dynamic recording (maximum, minimum,
or average) functions. Press and hold Hold/Max Min for more than 1 second to disable
dynamic recording function.
In Setup mode, the Hold/Max Min button is designated as a Save button. See
“Selecting Setup Menu” on page 64 for more information.
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 27
1 Getting Started
Primary
functions
Secondary
functions
Using the clamp meter buttons
Figure 1-5 Function and status buttons
The buttons located between the annunciator display and input terminals have
two functions: the primary functions (labels printed above the buttons) and
secondary functions (labels printed below the buttons). The primary function is
accessible by pressing the button momentarily, while the secondary function is
accessible by pressing the button for more than 1 second. Only do not
have secondary function.
Button Description
28 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
– Press Shift/Peak momentarily to perform a shifted function. The shifted function is mostly
used with the rotary switch to cycle between measurement functions. See “The rotary switch at
a glance” on page 30 for more information.
– Press Shift/Peak for more than 1 second to perform Peak function. See “1 ms Peak Hold” on
page 59 for more information.
– Press Hz/%/ momentarily to enable frequency measurement on the secondary display in
the annunciator display.
– Press Hz/%/ momentarily again (after enabling frequency measurement) to perform duty
cycle (%)
– Press Hz/%/ for more than 1 second to enable backlight illumination.
[a]
function.
Button Description
Press momentarily to enable the null math operation. See “Null (Relative)” on page 61 for
more information.
– Press Range/Auto momentarily to scroll through the available measurement ranges (except
diode and capacitance measurement).
– Press Range/Auto for more than 1 second to enable automatic range detection (except diode
and capacitance measurement). Press Range/Auto momentarily to disable automatic range
detection.
[a] The duty cycle function is only available for U1213A clamp meter.
Getting Started 1
Keysight U1211A, U1212A, and U1213A User’s and Service Guide 29
1 Getting Started
The rotary switch at a glance
Figure 1-6 Clamp meter rotary switch
The rotary switch allows you select desired measurements. To cycle between
measurements after rotating to a particular measurement function, press SHIFT.
Measurement function Description
Power off.
[a]
AC, DC
, or AC + DC
AC, DC, or AC + DC
Resistance measurement, audible continuity test, or temperature
[b]
current measurements. By default, measurement is set to AC current.
[b]
voltage measurements. By default, measurement is set to AC voltage.
[a]
measurement. By default, the
measurement is set to resistance measurement.
Diode or capacitance measurement. By default, measurement is set to diode measurement.
[a] The temperature measurement and DC current measurement are only available for U1212A and U1213A clamp meters.
[b] The AC + DC measurement is only available for U1213A clamp meter.
30 Keysight U1211A, U1212A, and U1213A User’s and Service Guide
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