Fluke 373 User manual

PN 3612805

July 2010

All product names are trademarks of their respective companies.

373

Clamp Meter

Users Manual

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LIMITED WARRANTY AND LIMITATION OF LIABILITY

This Fluke product will be free from defects in material and workmanship for three

years from the date of purchase. This warranty does not cover fuses, disposable

batteries, or damage from accident, neglect, misuse, alteration, contamination, or

abnormal conditions of operation or handling. Resellers are not authorized to extend

any other warranty on Fluke’s behalf. To obtain service during the warranty period,

contact your nearest Fluke authorized service center to obtain return authorization

information, then send the product to that Service Center with a description of the

problem.

THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS

FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE

IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR

THEORY. Since some states or countries do not allow the exclusion or limitation of an

implied warranty or of incidental or consequential damages, this limitation of liability

may not apply to you.

Fluke Corporation

P.O. Box 9090

Everett, WA 98206-9090

U.S.A.

Fluke Europe B.V.

P.O. Box 1186

5602 BD Eindhoven

The Netherlands

11/99

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Table of Contents

Title Page

Introduction................................................................................................................. 1

How to Contact Fluke ................................................................................................. 1

Safety Information ...................................................................................................... 2

The Meter ................................................................................................................... 7

Electrical Specifications.......................................................................................... 15

Mechanical Specifications ...................................................................................... 16

Environmental Specifications ................................................................................. 16

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373

Users Manual

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Introduction

XWWarning

Read "Safety Information" before you use the Meter.

The Fluke 373 Clamp Meter (the Meter) measures true-rms ac and dc voltage, ac current,

resistance, and capacitance.

How to Contact Fluke

To contact Fluke, call one of the following telephone numbers:

•Technical Support USA: 1-800-44-FLUKE (1-800-443-5853)

•Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)

•Canada: 1-800-36-FLUKE (1-800-363-5853)

•Europe: +31 402-675-200

•Japan: +81-3-3434-0181

•Singapore: +65-738-5655

•Anywhere in the world: +1-425-446-5500

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373

Users Manual

Or, visit Fluke's website at www.fluke.com.

To register your product, visit http://register.fluke.com.

To see, print, or download the latest manual supplement, visit

http://us.fluke.com/usen/support/manuals.

Safety Information

A Warning identifies conditions and actions that pose hazard(s) to the user; A Caution identifies

conditions and procedures that could cause Meter damage, equipment under test damage, or

permanent loss of data.

Symbols used on the Meter and in this manual are explained in Table 1.

XWWarning

To prevent possible electrical shock or personal injury, follow these guidelines:

•Use the Meter only as specified in this manual or the protection provided by the

Meter can be compromised.

•Examine the case before you use the Meter. Look for cracks or missing plastic.

Carefully look at the insulation around the connectors.

•Never measure ac current while the test leads are inserted into the input jacks.

•Make sure the battery door is closed and latched before operating the Meter.

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Clamp Meter

Safety Information

•Remove the test leads from the Meter before the battery door is opened.

•Examine the test leads for damaged insulation or exposed metal. Check test lead

continuity. Replace damaged test leads before using the Meter.

•Do not use the Meter if it operates incorrectly. Protection can be compromised.

When in doubt, have the Meter serviced.

•Do not use the Meter around explosive gas, vapor or in damp or wet

environments.

•When measuring, keep fingers behind the Tactile Barrier. See "The Meter" .

•Use only type AA batteries, properly installed in the Meter case, to power the

Meter.

•To avoid false readings that can lead to electrical shock and injury, replace the

batteries as soon as the low battery indicator () appears.

•When servicing the Meter, use only specified replacement parts.

•Have the Meter serviced only by qualified service personnel.

•Be careful around voltages > 30 V ac rms, 42 V ac peak, or 60 V dc. Such

voltages pose a shock hazard.

•Do not apply more than the rated voltage, as marked on the Meter, between the

terminals or between any terminal and earth ground.

•When using the probes, keep fingers behind the finger guards on the probes.

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373

Users Manual

•Connect the common test lead before connecting the live test lead. When

disconnecting test leads, disconnect the live test lead first.

•Do not work alone so assistance can be rendered in an emergency.

•Use extreme caution when working around bare conductors or bus bars. Contact

with the conductor could result in electric shock.

•Adhere to local and national safety codes. Individual protective equipment must

be used to prevent shock and arc blast injury where hazardous live conductors

are exposed.

•Disconnect circuit power and discharge all high-voltage capacitors before you

measure resistance, continuity, or capacitance.

•Do not measure current in circuits carrying more than 600 V or 600 A with the

Meter Jaw.

•Never operate the Meter with the back cover removed or the case open.

WCaution

To avoid possible damage to the Meter or to equipment under test:

•Use the proper jacks, function, and range for the measurement application.

•Clean the case and accessories with a damp cloth and mild detergents only.

Do not use abrasives or solvents. Make sure all water is removed before

use.

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Clamp Meter

Safety Information

Table 1. Symbols

Symbol Meaning Symbol Meaning

BAC (Alternating Current) JEarth ground

FDC (Direct Current) ~

Do not dispose of this product as

unsorted municipal waste. Go to

Fluke’s website for recycling

information.

XHazardous voltage PConforms to European Union

directives.

WRisk of Danger. Important

information. See Manual. )Conforms to relevant North American

Safety Standards.

MBattery TDouble insulated

®Examined and licensed by TÜV

Product Services. ;Conforms to relevant Australian

standards.

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373

Users Manual

Symbol Meaning Symbol Meaning

CAT III

IEC Measurement Category III

CAT III equipment has protection

against transients in equipment in

fixed-equipment installations, such

as distribution panels, feeders and

short branch circuits, and lighting

systems in large buildings.

CAT IV

IEC Measurement Category IV

CAT IV equipment has protection

against transients from the primary

supply level, such as an electricity

Meter or an overhead or

underground utility service.

,Application around and removal

from HAZARDOUS LIVE

conductors is permitted.

Note

The Measurement Category (CAT) and voltage rating of any combination of test probe,

test probe accessory, current clamp accessory, and the Meter is the LOWEST rating of

any individual component.

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