Radio Shack 22-168A Manuel utilisateur

MANUAL

DUAL-DISPLAY

OWNER’S

MANUAL

DIGITAL

MULTIMETER

w/PC

Interface

Please

read

before

using

this

equipment.

Cat.

No.

22-

168A,

zy,

£———

(U1)

Radio

Shaek

"Ste

INTRODUCTION

Your

Radio

Shack

LCD

Digital

Multimeter

portable,

digit,

compact

test

instrument

ideally

Suited

for

use

the

field,

lab,

shop,

and

home.

Here

are

some

the

professional

features

your

new

digital

meter.

Computer

Interface

and

Software

—

includes

both

MS-DOS

and

Microsoft

Windows

software

-to

let

you

interface

the

meter

with

your

PC-com-

patible

computer

log

and

graph

measure-

ments.

Memory

Recording

—

stores

ten

measure-

ments

which

you

can

download

computer.

Frequency

Check

Function

—

measures

fre-

quencies

MHz.

Transistor-Check

Function

—

measures

the

gain

(hFE)

small-signal,

bipolar

transistors.

Capacitor-Check

Function

—

measures

the

capacitance

low-voltage

capacitors.

Dual-Measurement

Function

—

shows

both

the

voltage

and

frequency

for

measure-

ments

the

logic

level

and

ripple

frequency

for

logic

measurements.

Analog

Bargraph

Display

—

indicates

the

mag-

nitude

the

input

compared

the

full-scale

value

the

measurement

range.

MAX/MIN

Hold

Function

—

displays

the

maxi-

mum

minimum

measured

value

the

second-

ary

display.

Data

Hold

Function

—

freezes

the

secondary

display

you

can

keep

the

measured

value

there

even

after

you

disconnect

the

probes.

Relative

Offset

—

stores

value

memory

and

displays

the

difference

between

the

stored

value

and

subsequent

readings.

1994

Tandy

Corporation.

‘All

Rights

Reserved.

Radio

Shack

registered

trademark

used

Tandy

Corporation.

Windows

trademark

and

MS-DOS

registered

trademark

Microsoft

Corporation.

Continuity

Function

—

makes

easy

check

fuses,

alarm

wiring,

cables,

and

connections.

Auto-Polarity

Operation

—

protects

‘your

meter

and

gives

valid

measurements

when

you

connect

the

leads

reverse

polarity.

Diode-Check

Function

—

safely

checks

semi-

conductor

junctions

for

open,

short,

normal.

Combined

(Function

and

Range)

Selector

Switch

—

makes

the

meter

easy

use.

Latest

and

Display

Technology

—

ensures

reliability,

accuracy,

stability,

and

ease

opera-

tion.

Auto

Power

Shut-Off

—

tums

off

after

min-

utes

non-use

help

conserve

battery

power.

Beeper

—

sounds

tones

for

overload

warming,

continuity

function,

and

range

selection.

Logic

Test

Function

—

checks

logic

levels

without

extra

logic

probes.

Overload

and

Transient

Protection

—

helps

protect

the

meter

from

accidental

overload

most

ranges.

Low-Battery

Indicator

—

appears

when

you

need

replace

the

batteries.

Listed

—

passes

the

stringent

tests

required

Underwriters

Laboratories

for

safety.

Cautions:

Completely

read

this

manual

before

you

use

the

meter.

you

are

not

familiar

with

meters

and

testing

procedures,

suggest

you

read

“Using

Your

Meter”

(Radio

Shack

Cat.

No.

62-2039).

CONTENTS

Word

About

Safety

oo.

Specifications

Special

Panel

Markings

Preparation

......

Installing/Replacing

the

Battery

Using

the

Test

Probes

Using

the

Stand...

Propping

the

Meter

Hanging

the

Meter

Pre-Operation

Check

Making

Measurements

Understanding

Phantom

Readings

Measuring

High-Voltage

Circuits

AC/DC

Voltage

Measurement

.....

Measuring

Voltage

Bias

Measuring

3-Phase

Voltages

Measuring

AC/DC

Current

Measuring

Capacitance

Measuring

Resistance

Checking

Diodes

Checking

Continuity

Checking

Transistors.

Measuring

Frequency.

Logic

Test.

Using

the

Advanced

Functions

Using

the

Auto-Hold

Feature

Using

the

Data

Hold

Feature

Using

the

Minimum

Feature

Using

the

Maximum

Feature

Using

the

Relative

Measurement

Feature

Using

the

Communication

Feature.......

Storing

Measurements

Memory

Recalling

Stored

Measurements

Using

the

Comparison

Measurement

Feature

Using

the

Dual

Measurements

Feature........

Using

the

Meter

with

Computer-.......

Interfacing

the

Meter

with

Compute:

Using

the

Supplied

Software

Technical

Information........

Communication

Parameters

Data

Format............0.00

Hints

for

Writing

Your

Own

Software.

Replacing

the

Fuse............0::0ccse

Care

and

maintenance

FCC

Statement.......

WORD

ABOUT

SAFETY

This

meter

has

been

manufactured

and

tested

accordance

with

IEC

348

and

DINS7411/VDE

0411

Part

Safety

Requirements

for

Electronic

Measuring

Apparatus,

Safety

Class

II.

have

taken

every

precaution

designing

and

manufacturing

this

meter

ensure

that

safe

can

make

it.

But

safe

operation

de-

pends

you,

the

operator.

recommend

that

you

these

simple

safety

rules:

Never

apply

voltages

the

meter

that

exceed

the

limits

given

the

specifications.

Never

apply

than

1000

750

bet-

ween

any

terminals

between

any

input

jack

and

ground.

Use

extreme

caution

when

working

with

volt-

ages

above

DC.

Always

dis-

connect

power

from

the

circuit

you

are

mea-

suring

before

you

connect

the

test

probes

high-voltage

points.

Never

connect

the

test

probes

source

voltage

when

you

select

diode,

resistance,

continuity,

current

measurement,

capacitance,

hFE

functions.

Always

tum

off

the

meter’s

power

and

disconnect

the

test

probes

before

you

replace

the

battery

fuse.

Never

operate

the

meter

unless

the

back

cov-

place

and

fully

closed.

Because

some

AC/DC

sets

have

hot

chas-

sis,

sure

the

top

your

work

bench

and

the

floor

undemeath

are

made

noncon-

ductive

materials.

The

meter

fully

calibrated

and

tested.

Under

normal

use,

further

adjustment

should

ne-

cessary.

the

meter

should

require

repair,

not

try

adjust

yourself.

Take

your

local

Radio

Shack

store.

Service

unauthorized

per-

sonnel

voids

the

warranty.

WARNING:

USE

EXTREME

CAUTION

THE

USE

THIS

DEVICE.

IMPROPER

USE

THIS

DEVICE

CAN

RESULT

INJURY

DEATH.

ALL

SAFEGUARDS

SUG-

GESTED

THIS

OWNER’S

MANUAL

ADDI-

TION

NORMAL

SAFETY

PRECAUTIONS

DEALING

WITH

ELECTRICAL

CIRCUITS.

NOT

USE

THIS

DEVICE

YOU

ARE

UNFA-

MILIAR

WITH

ELECTRICAL

CIRCUITS

AND

TESTING

PROCEDURES.

NOT FOR

COMMERCIAL

INDUSTRIAL

USE.

SPECIFICATIONS

VOLTS

(Maximum

Measuremen

200

20-

200

1000V

.....

1000V)

auaantbdasasiis

0.8%

Reading

and

0.3%

Full

Scale

Last

Digit

VOLTS

(Maximum

Measurement

750

200

20-200V

aejainnisses

1.2%

Reading

and

0.8%

Full

Scale

Last

Digit

TSO

ittcitesisisinssantivartictns

aieaebiskacinineniaiiacanitiinsiabicuinsndiinttiienstutcn

TOI65OF

ROAGING

ANd

1.2%

Full

Scale

Last

Digit

CURRENT

vena

Measurement

200

uA-2mA

sada

ssrnanssaniennsieunarunannannemennenenanae

1.0%

Reading

and

+0.5%

Full

Scale

Last

Digit

+1.5%

Reading

and

1.2%

Full

Scale

Last

Digit

Q0A

ores

puna

gunner

setiineinnnnnnes

2.5%

Reading

and

2.0%

Full

Scale

Last

Digit

200

essssssssssssssssesesnnssennnseeee

CURRENT

(Maximum

Measurement

200

uA-2mA.......

1.5%

Reading

and

1.0%

Full

Scale

Last

Digit

mA-

200

2.3%

Reading

and

1.8%

Full

Scale

Last

Digit

20A...

+3,.5%

Reading

and

+3.0%

Full

Scale

Last

Digit

CAPACITANCE

200

........

2.5%

Reading

and

2.0%

Full

Scale

Last

Digit

200

......

4.5%

Reading

and

+4.0%

Full

Scale

Last

Digit

RESISTANCE

200

Ohm.

.......

sue

£1%

Reading

and

0.5%

Full

Scale

Last

Digit

koh

20k

200K

MOWM

«.-sssressssseesseeseen

Reading

and

+0.5%

Full

Scale

Last

Digit

MOB

ssccssesssssessesessee

1.5%

Reading.

and

1.0%

Full

Scale

Last

Digit

2000

MOh

.....scsscssssssssessseseeee

5.5%

Reading

and

5.0%

Full

Scale

Last

Digit

FREQUENCY

QHZ

ansscssssssseesensinennosesessseteon

2.5%

Reading

and

2.0%

Full

Scale

Last

Digit

DIODE

CHECK

FUNCTION

......................

For

checking

semiconductors

for

open,

short,

normal

CONTINUITY

TEST

Continuity

buzzer

sounds

less

than

ohms

MEASUREMENT

........00.....cccesccssssseessns

O-1000

HFE

values

for

either

PNP

NPN

transistor.

Base

Current

about

Vce

about

3.0V

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