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

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NOTE:

When

reading

the

forward

voltage

drop

of

a

diode,

be

certain

that

the

anode

of

the

diode

is

connected

to

the

OHM

input

jack.

If

the

test

leads

are

reversed

the

display

will

give

an

overrange

indication.

Sec.6.6

Peak

Hold

Measurements

(for

Model

2002P

only)

When

taking

normal

measurements,

set

the

Peak

Hold

selector

switch

to

the

OFF

position.

When

taking

Peak

Hold

measurements,

set

the

Peak

Hold

selector

switch

to

the

10ms

or

100ms

position

only

after

the

test

leads

are

connected

to

the

circuit

under

test

or

the

transformer

jaws

are

clamped

onto

the

conductor.

The

peak

hold

display

may

read

higher

than

an

actual

value

to

be

measured

because

of

the

noise

that

may

develop

when

the

peak

hold

switch

is

set

before

the

test

leads

are

connected

or

the

transformer

jaws

clamped.

The

peak

hold

circuit

is

designed

to

select

a

10ms

or

100ms

response

time.

Choose

it

according

to

your

application

needs.

For

instance,

select

the

10ms

response

time

when

measuring

a

surge

voltage

or

current

that

will

occur

when

the

power

supply

is

turned

on.

The

100ms

response

time

is

recommended

for

measuring

the

starting

current

of

a

motor,

(a

stable

measurement

can

be

made

on

the

100ms

response

time

as

the

peak

hold

circuit

does

not

readily

respond

to

the

surge

current).

Slide

the

peak

hold

selector

switch

back

to

the

OFF

position

for

a

reset.

The

DSA-2002P

uses

an

analog

peak

hold

circuit

to

ensure

a

quick

response

to

input

current

and

voltage.

Because

of

the

nature

of

this

circuit

the

peak

hold

reading

may

gradually

vary

with

time

or

the

instrument

may

go

off

zero

by

several

counts

when

it

is

in

the

peak

hold

mode.

However,

this

does

not

indicate

a

faulty

condition.

It

is

likely

to

be

apparent

when

the

instrument

is

used

in

a

high

temperature,

high

humidity

environment.

The

instrument

will

restore

its

original

condition

when

returned

to

normal

temperature

and

humidity.

14

Sec.

6.7

Output

Jack

(DSA-2003

only)

The

analog

output

jack

is

provided

to

allow

the

DSA-2003

to

be

connected

to

a

recorder

or

oscilloscope

for

recording

or

observing

the

current

input.

WARNING

The

COM

input

jack

and

the

output

jack

common

terminal

are

internally

connected.

Remove

the

test

leads

from

the

input

jacks

before

making

any

connections

to

the

output

jack.

Do

not

use

the

output

jack

when

taking

voltage

measurements.

1.

Obtain

access

to

analog

output

by

inserting

output

jack

connector

or

optional

TL-37

test

lead

into

output

jack.

2.

Set

the

Range

Selector

Switch

to

the

highest

(2000A)

AC

or

DC

current

range.

The

output

voltage

signal

will

Lae

the

ram

whether

the

AC

or

DC

current

range

is

selected.

The

reading

displayed

on

the

LCD

is

effected

by

selecting

either

the

AC

or

DC

current

range,

so

it

is

recommended

that

the

appropriate

function

(AC

or

DC)

be

selected

if

the

LCD

reading

is

to

be

used

in

conjunction

with

the

output

jack

signal.

The

DC

position

will

display

on

the

LCD

the

average

value

of

the

input

current

and

the

AC

position

will

display

the

RMS

value

of a

sinewave

only.

For

true

RMS

measurements

it

is

recommended

that

the

output

voltage

signal

be

measured

with

a

TRMS

digital

multimeter.

3.

Press

the

trigger

to

open

the

jaw

and

encircle

the

one

conductor

in

which

the

current

is

to

be

measured.

If

the

input

Current

is

less

than

200A,

select

the

200A

range.

4.

The

readings

of

pure

DC

or

symmetrical

sinusoidal

AC

inputs

will

be

accurately

displayed

on

the

LCD.

In

addition,

any

type

of

waveform

will

be

available

at

the

output

jack,

provided

that

it

falls

within

the

frequency

specifications

of

the

instrument.

In

the

case

of

non-sinusoidal

current

waveforms,

the

LCD

readings

will

not

be

accurate,

but

the

output

voltage

signal

will

be

accurate.

NOTE:

Current

inputs

to

the

DSA-2003

for

use

with

the

output

jack

may

exceed

the

measurement

capabilities

of

the

instrument

(up

to

500A

on

the

200A

range

and

up

to

3000A

on

the

2000A

range).

The

output

signal

will

still

be

accurate

up

to

these

maximums

but

the

LCD

display

will

indicate

an

overrange

condition.

15

Questions and Answers:

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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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