Agilent Technologies U1241B Manual

Agilent Technologies
Agilent
U1241B and U1242B
Handheld Digital
Multimeters
User’s and Service Guide

II U1241B/U1242B User’s and Service Guide
Notices
© Agilent Technologies, Inc. 2009
No part of this manual may be reproduced in
any form or by any means (including elec-
tronic storage and retrieval or translation
into a foreign language) without prior agree-
ment and written consent from Agilent
Technologies, Inc. as governed by United
States and international copyright laws.
Manual Part Number
U1241-90063
Edition
First Edition, December 1, 2009
Printed in Malaysia
Agilent Technologies, Inc.
5301 Stevens Creek Blvd.
Santa Clara, CA 95051 USA
Warranty
The material contained in this docu-
ment is provided “as is,” and is sub-
ject to being changed, without notice,
in future editions. Further, to the max-
imum extent permitted by applicable
law, Agilent 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 par-
ticular purpose. Agilent shall not be
liable for errors or for incidental or
consequential damages in connec-
tion with the furnishing, use, or per-
formance of this document or of any
information contained herein. Should
Agilent 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 sep-
arate 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 accor-
dance with the terms of such license.
Restricted Rights Legend
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ware and technical data rights granted to
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rights customarily provided to end user cus-
tomers. Agilent provides this customary
commercial license in Software and techni-
cal 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 - Commercial
Items) and DFARS 227.7202-3 (Rights in
Commercial Computer Software or Com-
puter Software Documentation).
Safety Notices
CAUTION
A CAUTION notice denotes a haz-
ard. It calls attention to an operat-
ing 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.
WARNING
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly per-
formed or adhered to, could result
in personal injury or death. Do not
proceed beyond a WARNING
notice until the indicated condi-
tions are fully understood and
met.

U1241B/U1242B User’s and Service Guide III
Safety Symbols
The following symbols on the instrument and in the documentation
indicate precautions which must be taken to maintain safe operation of
the instrument.
Direct current (DC) Off (supply)
Alternating current (AC) On (supply)
Both direct and alternating current Caution, risk of electric shock.
Three-phase alternating current Caution, risk of danger (refer to this
manual for specific Warning or
Caution information).
Earth (ground) terminal Caution, hot surface.
Protective conductor terminal Out position of a bi-stable push
control.
Frame or chassis terminal In position of a bi-stable push
control.
Equipotentiality CAT III
1000 V
Category III 1000 V Overvoltage
Protection
Equipment protected throughout by
double insulation or reinforced
insulation.
CAT IV
600 V
Category IV 600 V Overvoltage
Protection

IV U1241B/U1242B User’s and Service Guide
Regulatory Markings
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/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 shown as below:
Do not dispose in domestic household waste
To return this unwanted instrument, contact your nearest Agilent office,
or visit:
www.agilent.com/environment/product
for more information.
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 C-tick 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.
ICES/NMB-001 indicates that this ISM
device complies with Canadian
ICES-001.
This instrument complies with the WEEE
Directive (2002/96/EC) marking
requirement. This affixed product label
indicates that you must not discard this
electrical/electronic product in domestic
household waste.
The CSA mark is a registered trademark
of the Canadian Standards Association.

U1241B/U1242B User’s and Service Guide V
General Safety Information
The following general safety precautions must be observed during all
phases of operation, service and repair of this instrument. Failure to
comply with these precautions or with specific warnings elsewhere in
this manual violates safety standards of design, manufacture and
intended use of the instrument. Agilent Technologies assumes no liability
for the customer’s failure to comply with these requirements.
WARNING
•Observe all markings on the instrument before connecting any
wiring to the instrument.
• When working above 60 VDC, 30 VAC RMS or 42 V peak, exercise
caution – such range pose a shock hazard.
• Do not measure more than the rated voltage (as marked on the
meter) between terminals, or between terminal and earth ground.
• Double-check the meter’s operation by measuring a known voltage.
• For current measurement, turn off circuit power before connecting
the meter to the circuit. Always place the meter in series with the
circuit.
• 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 meter before you open the battery cover.
• Do not use the meter with the battery cover or part of the cover
removed or loose.
• Replace the battery as soon as the low battery indicator flashes
on screen. This is to avoid false readings, which may lead to possible
electric shock or personal injury.
• 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 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.

VI U1241B/U1242B User’s and Service Guide
WARNING
• Do not use repaired fuses or short-circuited fuse-holders. For
continued protection against fire, replace the line fuses only with
fuses of the same voltage and current rating and recommended type.
• 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.
• Do not substitute parts or modify equipment to avoid the danger of
introducing additional hazards. Return the product to Agilent
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
Agilent Technologies Sales and Service Office for service and repair
to ensure the safety features are maintained.
CAUTION
• Turn off circuit power and discharge all high-voltage capacitors in the
circuit before you perform resistance, continuity, diodes, or
capacitance tests.
• Use the correct terminals, function, and range for your measurements.
• Never measure voltage when current measurement is selected.
• Ensure proper insertion of battery in the meter, and follow the correct
polarity.

U1241B/U1242B User’s and Service Guide VII
Environment Conditions
This instrument is designed for indoor use, in areas with low condensation
and to be used with standard or compatible test probes.
Environment Conditions Requirements
Operating environment Full accuracy at –10 °C to 55 °C
Operating relative humidity Full accuracy up to 80% RH for
temperature up to 30 °C, decreasing
linearly to 50% RH at 55 °C
Storage environment –20 °C to 70 °C
Altitude 0 – 2000 meters per IEC 61010-1 2nd
Edition CAT III, 1000 V/ CAT IV, 600 V
Pollution Degree Pollution Degree II
CAUTION
The Agilent U1241B and U1242B are safety-certified in compliance with
the following safety and EMC requirements:
• IEC 61010-1:2001 / EN61010-1:2001
• USA: UL 61010-1:2004
• Canada: CSA C22.2 No. 61010-1:2004
• IEC 61326-1:2005/ EN 61326-1:2006
• Canada: ICES/NMB-001:2004
• Australia/New Zealand: AS/NZS CISPR11:2004

VIII U1241B/U1242B User’s and Service Guide
Declaration of Conformity (DoC)
The Declaration of Conformity (DoC) for this instrument is available on the
Web site. You can search the DoC by its product model or description.
http://regulations.corporate.agilent.com/DoC/search.htm
NOTE
If you are unable to search for the respective DoC, please contact your
local Agilent representative.

U1241B/U1242B User’s and Service Guide IX
In This Guide…
1 Getting Started Chapter 1 introduces key features and steps to get
started with a U1241B or U1242B handheld digital multimeter. This
chapter also guides you through the basics of the front panel operations.
2 Features and Functions Chapter 2 contains the information on how to
set up connections to perform meter measurements. It also describes the
features and functions that are available in the U1241B and U1242B
handheld digital multimeters in step-by-step instructions.
3 Default Setting Configurations Chapter 3 describes on how to
change and configure the default setting of the U1241B and U1242B
handheld digital multimeters including data logging and other setting
features
4Service and Maintenance Chapter 4 provides the information on the
warranty, services, maintenance procedures and troubleshooting hints to
solve general problems that you may encounter with the meter.
5Performance Tests and Calibration Chapter 5 contains the
procedures of the performance verification tests and calibration
adjustments.
6Specifications and Characteristics Chapter 6 lists the specifications
and characteristics of the U1241B and U1242B handheld digital
multimeters.

X U1241B/U1242B User’s and Service Guide