PSC 101 - Calibration

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-

‘MOD

703

`

-MOD

721

MOD

4-DIGIT

DIGITAL

METERED

VARIAC

GATED

OUTPUT

VOLTAGE

AMPLIFIER

(with

presicion

DC

comparator

+0.

1%)

VOLTMETER

TEST

SETUP

FOR

REGULATION

AND

RIPPLE

SECTION

6

CALIBRATION

With

Power

Supply

turned

OFF,

zero

the

meter

movement

on

the

front

panel.

Turn

on

power

and

set

the

meter

switch

to

VOLTAGE.

Connect

1%

Voltmeter

to

plus

(+)

and

minus

(-)

output

terminals

on

the

power

supply.

Set

Voltage

Controls

on

front

panel

for

maximum

output

voltage.

Adjust

trim

pot

R23

within

the

power

supply

for

the

maximum

rated

voltage

output

of

the

unit.

Adjust

trim

pot

R-2

such

that

the

meter

on

the

front

panel

is

the

same

as

the

1%

Volt-

meter

reading.

Reduce

the

output

voltage

of

the

unit

and

set

the

CURRENT/VOLTAGE

switch

to

CURRENT.

Connect

a

1%

ammeter

to

the

output

terminals

of

the

power

supply.

Adjust

the

Current

Controls

on

the

front

panel

for

maximum

current

output.

Adjust

trim

pot

8-22

within

the

unit

for

the

maximum

rated

output

current

of

the

unit.

Adjust

trim

pot

R-1

for

the

same

current

readings

on

the

front

panel

meter

and

the

test

ammeter.