Fluke 87 TRUE RMS MULTIMETER Manuale utente

True RMS Multimeter

Users Manual

PN 834192

August 1988 Rev.8, 4/97

All product names are trademarks of their respective companies.

Interference Information

This equipment generates and uses radio frequency energy and if not installed and used in strict accordance with

the manufacturer’s instructions, may cause interference to radio and television reception. It has been type tested

and found to comply with the limits for a Class B computing device in accordance with the specifications of Part

15 of FCC Rules, which are designed to provide reasonable protection against such interference in a residential

installation.

Operation is subject to the following two conditions:

•This device may not cause harmful interference.

•This device must accept any interference received, including interference that may cause undesired opera-

tion.

There is no guarantee that interference will not occur in a particular installation. If this equipment does cause in-

terference to radio or television reception, which can be determined by turning the equipment off and on, the user

is encouraged to try to correct the interference by one of more of the following measures:

•Reorient the receiving antenna

•Relocate the equipment with respect to the receiver

•Move the equipment away from the receiver

•Plug the equipment into a different outlet so that the computer and receiver are on different branch circuits

If necessary, the user should consult the dealer or an experienced radio/television technician for additional sug-

gestions. The user may find the following booklet prepared by the Federal Communications Commission helpful:

How to Identify and Resolve Radio-TV Interference Problems. This booklet is available from the U.S. Govern-

ment Printing Office, Washington, D.C. 20402. Stock No. 004-000-00345-4.

Fluke Coporation Fluke Europe B.V.

P.O. Box 9090 P.O. Box 1186

Everett, WA 98206-9090 5602 BD Eindhoven

U.S.A. The Netherlands

Table of Contents

Title Page

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

Multimeter Safety ........................................................................................................... 2

Getting Started Quickly .................................................................................................. 3

How to Use the Meter..................................................................................................... 6

Input Terminals and Input Alert ................................................................................. 6

Pushbuttons............................................................................................................... 8

Summary of Power-On Options................................................................................. 13

Digital and Analog Displays....................................................................................... 13

Holster and Flex-Stand.............................................................................................. 17

Applications....................................................................................................................17

Measuring Voltage (AC/DC)...................................................................................... 19

Measuring Current..................................................................................................... 19

Continuity Testing...................................................................................................... 20

Measuring Resistance............................................................................................... 20

Using Conductance for High Resistance or Leakage Tests...................................... 21

Users Manual

Noisy Resistance Measurements.............................................................................. 22

Measuring Capacitance ............................................................................................ 22

Diode Testing............................................................................................................ 23

Using the Analog Display.......................................................................................... 24

Using the MIN MAX Recording Mode....................................................................... 24

Measuring Frequency............................................................................................... 26

Measuring Duty Cycle............................................................................................... 27

Pulse Width Measurements...................................................................................... 29

Maintenance.................................................................................................................. 29

General Maintenance................................................................................................ 29

Calibration................................................................................................................. 30

Battery Replacement ................................................................................................ 30

Fuse Test W............................................................................................................. 30

Fuse Replacement W............................................................................................... 32

Service W................................................................................................................. 32

Replaceable Parts ......................................................................................................... 33

Specifications................................................................................................................. 36

iii

List of Tables

Table Title Page

1. International Electrical Symbols.......................................................................................... 3

2 Input Terminals and Limits..................................................................................................4

3. Beeper Response in Continuity Test..................................................................................7

4. Options Available at Power-on .........................................................................................14

5. Approximate Charge Rate for Capacitors......................................................................... 23

6. Frequency Counter Operation With Current Inputs..........................................................27

7. Replaceable Parts ............................................................................................................ 34

Users Manual

List of Figures

Figure Title Page

1. Summary of Pushbutton Operation ....................................................................................9

2. Holster and Flex-Stand..................................................................................................... 18

3. Duty Cycle Measurement of Typical Logic Signal............................................................. 28

4. Battery and Fuse Replacement ........................................................................................ 31

5. Replaceable Parts ............................................................................................................ 35

Users Manual

Introduction

Note

This meter has been designed and tested

according to IEC 1010-1, Safety Requirements

for Electrical Equipment for Measurements,

Control, and Laboratory Use. This manual

contains information and warnings which must be

followed to ensure safe operation and retain the

meter in safe condition. If the meter is not used

as described in this manual, the safety features

of the meter might be impaired.

Warning

Read "Multimeter Safety" before using the

meter.

The Fluke 87 True RMS Multimeter (also referred to as

"the meter") is a handheld, 4000-count instrument that is

designed for use in the field, laboratory, and at home. The

meter combines the precision of a digital meter with the

speed and versatility of a high resolution analog display.

Frequencies between 0.5 Hz and 200 kHz can be

measured with up to 0.01 Hz resolution. The meter is

against dirt, dust, and moisture. A snap-on holster, with

flexible stand (Flex-Stand), protects the meter from

rough handling. The flexible stand allows the meter to be

stood or hung.

The meter also provides:

•A MIN MAX Recording mode, in which the meter

"remembers" the lowest and highest readings,

calculates the true average of all readings taken over

a period as long as thirty-six hours, and displays

these values. The beeper emits a Min Max Alert

when a new minimum or maximum reading is

recorded.

•A Peak MIN MAX mode that captures changes as

short as 1 millisecond.

•An alternate Frequency Counter mode that measures

duty cycle and displays it as a value between 0.1 and

99.9%.

•An Input Alertthat causes the beeper to sound if the

test leads are plugged into the wrong input terminals

for the function being performed.

•A REL mode that allows you to store a reading in

memory, and display the difference between the

stored value and subsequent readings.

Users Manual

•A Touch Holdmode that allows you to keep your

eyes fixed on the probes when taking measurements

in difficult or hazardous circumstances, then read the

display when it is convenient and safe.

•A display back-light that makes the meter useable in

dark areas.

•A 4 ½-digit display mode for a ten times increase in

resolution.

•A Capacitance mode that measures capacitors from

0.01 nF to 5 µF.

After unpacking the meter, if you notice that the meter is

damaged or something is missing, contact the place of

purchase immediately. Save the shipping container and

packing material in case you have to reship the meter.

Multimeter Safety

Before using the meter, read the following safety

information carefully. In this manual the word, "Warning,"

is reserved for conditions and actions that pose hazard(s)

to the user; the word, "Caution," is reserved for conditions

and actions that may damage your meter. The symbols

shown in Table 1 are used internationally to denote the

electrical functions and conditions indicated. If the meter is

not used as described in this manual, the safety features

of the meter might be impaired.

•Avoid working alone.

•Do not allow the meter to be used if it is damaged, or

it's safety is impaired.

•Inspect the test leads for damaged insulation or

exposed metal. Check test lead continuity. Damaged

leads should be replaced.

•Be sure the meter is in good operating condition.

During a continuity test, a meter reading that goes

from overload (OL) to 0 generally means the meter is

working properly.

•Select the proper function and range for your

measurement.

•In order to maintain the safety protection of this

meter, use only parts listed in the Service Manual.

Refer to Table 7 for the Service Manual part number.

•CAT III: For making measurements on equipment in

fixed installations (industrial).

Warning

To avoid electrical shock, use caution when

working above 60V dc or 30V ac rms. Such

voltages pose a shock hazard.

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