Chapter III. OPERATION

CHAPTER 3

OPERATION

a. Place the DC OUTPUT switch at OFF.

3-1. Damage From Improper Control Setting

P l a c e the AC INPUT power switch to ON.

Before placing the DC OUTPUT switch in

Observe that the pilot indicator lamp lights.

t h e O N position, always set the dc output

b. A d j u s t t h e V O L T A G E C O N T R O L a n d

voltage to the dc voltage level required by the

V O L T A G E VERNIER knobs fully counter-

l o a d . If this procedure is not performed, the

c l o c k w i s e then fully clockwise. Observe that

e q u i p m e n t to which the dc output voltage is

t h e voltmeter indication varies from 0 to 36

b e i n g supplied may become damaged by the

volts.

a p p l i c a t i o n of excessive dc voltage from the

C a u t i o n : Before placing the DC OUTPUT

power supply.

switch to ON, always set the output voltage

to the dc voltage level required by the load.

3-2. Controls and Indicators

Excessive voltage may damage the load con-

nected to the power supply.

c. Set the output voltage to the level required

by the load. Place the DC OUTPUT switch at

ON.

d. A d j u s t t h e V O L T A G E C O N T R O L a n d

V O L T A G E VERNIER knobs until the volt-

m e t e r and ammeter indicate the desired volt-

age and current output.

e. During manufacture, the voltmeter in the

power supply is direct-connected across the

output terminals of the power supply and

m o n i t o r s the dc voltage output of the power

supply. Under heavy load conditions, a signi-

ficant difference may exist between the voltage

present at the output of the power supply and

the input voltage to the load. To monitor the

voltage input to the load rather than the

3-3. Operation

voltage output of the power supply, remove the

To operate the power supply, follow the pro-

f a c t o r y - i n s t a l l e d jumper between terminals 1

cedure given in a through e b e l o w .

and 2 and the jumper between terminals 3 and

4 of TB1 at the rear of the power supply. Con-

Caution: Before turning on the power sup-

n e c t a lead from terminal 2 of TB1 to the

ply, always make sure that the DC OUTPUT

positive end of the load and a lead from termi-

switch is in the OFF position. Failure to take

nal 3 of TB1 to the negative end of the load.

this precaution may result in damage to the

3-1