A.W. Sperry Instruments AWS DIGISNAP DSA-2002 User Manual

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5.

If

the

overrange

indication

(the

3

least

significant

digits

blanked)

appears

on

the

display,

set

the

Range

Selector

Switch

to

the

2000A

range.

If

overrange

indication

is

still

present,

remove

transformer

jaws

from

the

conductor

immediately.

6.

To

obtain

a

reading

when

the

meter

cannot

be

directly

observed,

depress

the

Data

Hold

button

after

enclosing

the

conductor

with

the

jaws.

The

reading

will

be

held

after

the

meter

is

removed

from

the

conductor,

allowing

easy

observation.

Sec.6.3

DC

Current

Measurements

(DSA-2003)

When

the

jaws

of

the

DSA-2003

are

snapped

around

a

conductor

carrying

dc

current,

they

will

become

magnetized

as

part

of

their

proper

operation.

Even

after

the

current

is

removed,

a

slight

amount

of

magnetization

may

remain,

causing

the

instrument

to

be

slightly

off

zero.

This

effect

is

called

hysteresis.

The

magnitude

of

the

hystersis

effect

will

depend

upon

how

much

current

was

original

flowing

in

the

conductor.

Follow

these

instructions

carefully

to

avoid

inaccurate

readings

that

could

result

from

hysteresis.

1.

Before

taking

a

DC

current

measurement,

zero

adjust

the

display

by

turning

the

DC

AO

ADJ.

control

using

the

Zero

Adjust

Screwdriver

included

with

the

instrument.

2.

Take

reading

using

the

procedures

described

in

the

previous

section,

observing

the

warnings

and

cautions

indicated.

3.

After

taking

a

reading

check

that

the

display

has

returned

to

zero.

If

not,

re-zero

the

instrument

and

take

a

second

reading.

Sec.

6.4

Voltage

Measurements

1.

Insert

the

red

and

black

test

leads

into

the

respective

VOLT

and

COM

input

jacks.

WARNING

The

output

jack

of

the

DSA-2003

is

connected

directly

to

the

COM

input

jack

of

the

instrument.

Be

sure

that

the

plug

is

disconnected

from

the

output

jack

of

the

DSA-2003

before

attempting

to

make

any

voltage

measurements.

The

output

jack

is

used

with

current

measurements

only.

2.

Set

the

Range

Selector

Switch

to

the

750Vac

(or

the

1000Vdc

range

on

the

DSA-2003

for

dc

readings).

The

ia?

V

will

appear

on

the

display

indicating

the

voltage

unction.

12

——_4

o—

WARNING

To

avoid

possible

electric

shock,

instrument

damage

and/or

equipment

damage,

do

not

attempt

to

take

any

voltage

measurements

if

the

voltage

is

unknown.

750Vac

and

1000Vdc

(DSA-2003

only)

are

the

maximum

voltages

that

these

instruments

are

designed

to

measure.

The

COM

input

jack

potential

should

not

exceed

500V

measured

to

ground.

3.

Connect

the

test

leads

to

the

two

points

where

a

voltage

reading

is

to

be

taken.

4.

The

reading

will

be

indicated

on

the

display.

If

the

indicated

reading

is

below

200V,

set

the

Range

Selector

Switch

to

the

200V

range.

5.

Remove

the

test

leads

from

the

points

of

voltage

measurement

and

then

remove

the

test

leads

from

the

instrument.

Sec.6.5

Resistance

Measurements

1.

Insert

the

black

and

red

test

leads

into

the

respective

COM

and

OHMS

input

jacks.

2.

Set

the

Range

Selector

Switch

to

the

resistance

range

desired

to

be

used.

(The

1500

range

on

the

DSA-2003

is

also

a

diode

test

range

which

is

calibrated

to

read

ohms

as

well

as

the

voltage

drop

across

the

input

loadin

dc

millivolts.

This

is

accomplished

by

holding

a

constant

1.0mAdc

output

test

current.

The

mV

and

2

symbol

will

appear

on

the

display

at

the

same

time

on

this

range.)

WARNING

All

resistance

and

>»

measurements

should

be

made

on

de-energized

circuits

only

to

insure

safe

and

accurate

measurements.

Protection

is

provided

up

to

500Vac/dc,

but

readings

will

not

be

accurate.

To

avoid

possible

electric

shock,

instrument

damage

and/or

equipment

damage,

do

not

connect

the

input

jacks

to

circuits

having

a

potential

difference

exceeding

500Vac/dc.

Do

not

connect

the

COM

jack

to

potentials

exceeding

500Vac/dc

to

ground.

3.

Completely

de-energize

the

circuit

or

device

which

is

to

be

measured.

Connect

the

test

leads

to

the

device

(the

red

test

lead

is

more

positive

than

the

black

test

lead).

4.

A

reading

of

indicates

an

overrange

condition.

This

will

occur

when

the

test

leads

are

open

on

all

resistance

ranges.

(If

overranging

occurs

when

taking

a

reading

on

the

DSA-2003,

set

the

Range

Selector

Switch

to

the

15000

range.

13

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A.W. Sperry Instruments AWS DIGISNAP DSA-2002 Specifications

General

Brand	A.W. Sperry Instruments
Model	AWS DIGISNAP DSA-2002
Category	Measuring Instruments
Language	English

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