Fluke 77 User Manual

Series iii multimeter, Instruction sheet

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77/75/23/21 English Instruction Sheet

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1

®

77/75/23/21

Series III Multimeter

Instruction Sheet

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Read First: Safety Information

Never use the meter if the meter or test leads look damaged.

Be sure the test leads and switch are in the correct position for

the desired measurement.

Never measure resistance in a circuit when power is applied.

Never touch the probes to a voltage source when the test

leads are plugged into the 10 A or 300 mA input jack.

Never apply more than the rated voltage between any input

jack and earth ground.

Be careful when working with voltages above 60 V dc or 30 V

ac rms. Such voltages pose a shock hazard.

Keep your fingers behind the finger guards on the test probes

when making measurements.

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Warning

To avoid false readings, which could lead to
possible electric shock or personal injury, replace
the battery as soon as the battery indicator (

M

)

appears.

Symbols

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Read First: Safety Information

Y

Dangerous Voltage May Be Present

T

Double Insulation

Overvoltage Installation Category per IEC 1010:

CAT II

CAT III

Typical locations include; main wall outlets,
local appliances, and portable equipment.

Typical locations include switches in the fixed
installation and equipment for industrial use
permanently connected to the fixed installation.

PN 650512 August 1997 Rev.2, 7/98

1997, 1998 Fluke Corporation. All rights reserved. Printed in U.S.A.

All product names are trademarks of their respective companies

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This manual is related to the following products:

23, 21, 75