Agilent Technologies U1251A Manuel

Agilent Technologies

Agilent U1251A and

U1252A

Handheld Digital

Multimeter

User’s and Service Guide

2 Agilent U1251A/U1252A User’s and Service Guide

Notices

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

U1251-90003

Edition

Fourth Edition, May 27, 2007

Printed in Malaysia

Agilent Technologies, Inc.

3501 Stevens Creek Blvd.

Santa Clara, CA 95052 USA

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

U.S. Government Restricted Rights. Soft-

ware and technical data rights granted to

the federal government include only those

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).

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.

Accessories Warranty

Agilent offers warranty for product’s acces-

sories for up to 3 months from the end-user

acceptance date.

Standard Calibration Service

(optional)

Agilent offers an optional calibration service

contract for a period of 3 years from

end-user acceptance date.

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.

Agilent U1251A/U1252A User’s and Service Guide 3

Safety Information

This meter is safety-certified in compliance with EN/IEC 61010-1:2001, UL 61010-1 Second Edition and CAN/CSA

22.2 61010-1 Second Edition, Category III 1000 V Overvoltage Protection, Pollution Degree II. Use with standard or

compatible test probes.

WARNING

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.

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.

Use the meter only as specified in this guide. Otherwise, the protection provided by the meter may be impaired.

Refer to the safety information below:

•When working above 70V DC, 33 V AC RMS or 46.7 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.

4 Agilent U1251A/U1252A User’s and Service Guide

•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.

•Do not use any other AC charger adaptor apart from the one certified by Agilent with this product.

•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.

•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.

•Use only recommended rechargeable battery. Ensure proper insertion of battery in the meter, and follow the

correct polarity.

• Disconnect test leads from all the terminals during battery charging.

Agilent U1251A/U1252A User’s and Service Guide 5

Safety Symbols

CAT III

1000 V

Category III 1000 V Overvoltage Protection

Double insulation

Earth ground

Caution, risk of danger

(Refer to the User’s and Service Guide for details)

Caution, risk of electric shock

6 Agilent U1251A/U1252A User’s and Service Guide

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. If it was accompanied

by a year, it indicates the year the design was approved. This ISM

device complies with Canadian ICES-001.

The CSA mark is a registered trademark of the Canadian

Standards Association.

The UL mark is a registered trademark of Underwriters

Laboratories Inc.

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.

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.

Agilent U1251A/U1252A User’s and Service Guide 7

DECLARATION OF CONFORMITY

According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014

Generic example

Manufacturer’s Name: Agilent Technologies Microwave Products (M) Sdn. Bhd

Manufacturer’s Address: Bayan Lepas Free Industrial Zone,

11900, Bayan Lepas, Penang, Malaysia

Declares under sole responsibility that the product as originally delivered

Product Name: Handheld Digital Multimeter

Model Number: U1251A, U1252A

Product Options: This declaration covers all options of the above product(s)

complies with the essential requirements of the following applicable European Directives, and

carries the CE marking accordingly:

Low Voltage Directive (73/23/EEC, amended by 93/68/EEC)

EMC Directive (89/336/EEC, amended by 93/68/EEC)

and conforms with the following product standards:

EMC Standard

StandardStandard

Standard

Limit

LimitLimit

Limit

IEC 61326-1:1997+A1:1998 / EN 61326-1:1997+A1:1998

CISPR 11:1990 / EN55011:1991 Class A Group 1

IEC 61000-4-2:1995+A1:1998 / EN 61000-4-2:1995 4 kV CD, 8 kV AD

IEC 61000-4-3:1995 / EN 61000-4-3:1995 3 V/m, 80-1000 MHz

IEC 61000-4-4:1995 / EN 61000-4-4:1995 0.5 kV signal lines, 1 kV power lines

IEC 61000-4-5:1995 / EN 61000-4-5:1995 0.5 kV line-line, 1 kV line-ground

IEC 61000-4-6:1996 / EN 61000-4-6:1996 3 V, 0.15-80 MHz

IEC 61000-4-11:1994 / EN 61000-4-11:1994 1 cycle / 100%

Canada: ICES-001:1998

Australia/New Zealand: AS/NZS 2064.1

The product was tested in a typical configuration with Agilent Technologies test systems.

Safety IEC 61010-1:2001 / EN 61010-1:2001

Canada: CSA C22.2 No. 61010-1:2004

USA: UL 61010-1: 2004

Supplementary Information:

U1251A is provided with 9Vdc non-rechargeable battery, without AC power adaptor.

U1252A is provided with 9Vdc rechargeable battery, with AC power adaptor (U1170A).

IEC/EN61000-4-4, -4-5, -4-6, -4-11 are applicable for the AC power adaptor configuration for model U1252A.

This DoC applies to above-listed products placed on the EU market after:

22-August-2006

Date

Mack Soh

Quality Manager

For further information, please contact your local Agilent Technologies sales office, agent or distributor,

or Agilent Technologies Deutschland GmbH, Herrenberger Straße 130, D 71034 Böblingen, Germany.

Template: A5971-5302-2, Rev. B.01 U1251A Rev 1.0

8 Agilent U1251A/U1252A User’s and Service Guide

Product Regulations

Performance Criteria

IEC 61326-1:1997+A1:1998 / EN 61326-1:1997+A1:1998 U1251A U1252A

CISPR 11:1990 / EN 55011:1991 – Group 1 Class A

IEC 61000-4-2:1995+A1:1998 / EN 61000-4-2:1995 (ESD

4kV CD, 8kV AD)

B B

IEC 61000-4-3:1995 / EN 61000-4-3:1995 (3V/m, 80% AM) A A

IEC 61000-4-4:1995 / EN 61000-4-4:1995 (EFT 0.5kV line-

line, 1kV line-earth)

N/A A

IEC 61000-4-5:1995 / EN 61000-4-5:1995 (Surge 0.5kV line-

line, 1kV line-earth)

N/A A

IEC 61000-4-6:1996 / EN 61000-4-6:1996 (3V, 0.15~80 MHz,

80% AM, power line)

N/A A

IEC 61000-4-11:1994 / EN 61000-4-11:1994 (Dips 1 cycle,

100%)

N/A A

Canada: ICES-001:1998

Australia/New Zealand: AS/NZS 2064.1

EMC

IEC 61010-1:2001 / EN 61010-1:2001

Canada: CSA C22.2 No. 61010-1:2004

Safety

USA: UL 61010-1: 2004

Additional Information:

The product herewith complies with the essential requirements of the Low Voltage Directive 73/23/EEC and the

EMC Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly (European Union).

Performance Criteria:

A Pass - Normal operation, no effect.

B Pass - Temporary degradation, self recoverable.

C Pass - Temporary degradation, operator intervention required.

D Fail - Not recoverable, component damage.

N/A – Not applicable

Notes:

Regulatory Information for Canada

ICES/NMB-001:1998

This ISM device complies with Canadian ICES-001.

Cet appareil ISM est confomre à la norme NMB-001 du Canada.

Regulatory Information for Australia/New Zealand

This ISM device complies with Australian/New Zealand AS/NZS 2064.1

Agilent U1251A/U1252A User’s and Service Guide 9

Contents

1 Getting Started Tutorial 13

Introducing the Agilent U1251A and U1252A Handheld Digital

Multimeter 14

Adjusting the Tilt-Stand 15

The Front Panel at a Glance 17

The Rotary Switch at a Glance 18

The Keypad at a Glance 19

The Display at a Glance 21

Selection of Display by Hz Button 25

Selection of Display by Dual Button 27

Selection of Display by SHIFT Button 30

The Terminals at a Glance 32

The Rear Panel at a Glance 33

2 Making Measurements 35

Measuring Voltage 36

Measuring Current 39

Measuring DC voltage 38

Measuring Current 39

µA & mA Measurement 39

% Scale of 4–20 mA 40

A measurement 41

Frequency Counter 42

Measuring Resistance, Conductance and Testing Continuity 44

Te st i ng D io d e s 48

Measuring Capacitance 51

Measuring Temperature 52

Alerts and Warning During Measurement 55

Overload Alert 55

Input Warning 55

Charge Terminal Alert 56

10 Agilent U1251A/U1252A User’s and Service Guide

Contents

3 Features and Functions 57

Dynamic Recording 58

Data Hold (Trigger Hold) 60

Refresh Hold 61

NULL (Relative) 63

Decibel Display 65

1 ms Peak Hold 67

Data Logging 69

Manual Logging 69

Interval Logging 71

Reviewing Logged Data 73

Square Wave Output (for U1252A) 75

Remote Communication 80

4 Changing The Default Setting 81

Selecting Setup Mode 82

Setting Data Logging Mode 86

Setting Thermocouple Types (for U1252A) 87

Setting Reference Impedance for dBm Measurement 88

Setting Minimum Frequency Measurement 89

Setting Temperature Unit 90

Setting Auto Power Saving Mode 92

Setting % Scale Readout 94

Setting Beep Frequency 95

Setting Backlit Timer 96

Setting Baud Rate 97

Setting Parity Check 98

Setting Data Bit 99

Setting Echo Mode 100

Setting Print Mode 101

Returning to Default Factory Settings 102

5 Maintenance 103

Introduction 104

General Maintenance 104

Battery Replacement 105

Charging Battery 106

Fuse Replacement 113

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