Figure 2-5. Power Supply PP-3940A/G, connections for remote sensing.

TM 11-6130-247-14-1

current and a specific voltage that is not to be

exceeded, proceed as follows.

a. Turn front panel VOLT ADJ and CUR

ADJ coarse and fine controls fully counterclock-

wise and set power supply POWER switch S1

to off.

b. Determine the limits of voltage and current

to be supplied by the power supply. For example,

constant voltage of 28 volts dc with current not

to exceed 1.5 ampere dc.

Figure 2-5. Power Supp!y PP-3940A/G, connections for

c. Be sure that terminal board links are con-

remote sensing.

nected as stated in paragraph 2-5a.

d. Connect load to front panel terminals.

leads from terminals 3 and 6 should be

e. Set power supply POWER switch to ON.

either a coaxial pair or twisted pair

in order to minimize stray pickup,

f. Set the not to exceed value (either current

which might result in power supply in-

or voltage), using the front `panel coarse and

stability.

fine controls and meter. (For the example given

in b above, turn the CUR ADJ coarse and fine

d. Set POWER switch S1 to ON and turn

front panel CUR ADJ coarse and fine controls

controls for a reading of 1.5 ampere on ammeter, )

fully clockwise.

g. Set the constant value (either current or

voltage) using the f rent panel coarse and fine

e. Adjust front panel VOLT ADJ coarse and

controls and meter. (For the example given in

fine controls for required. constant voltage out-

b above, turn the VOLT ADJ coarse and fine

put.

controls for a reading of 28 volts on voltmeter. )

2-12. Power Supply Setup Procedures When

NOTE

Specific Values of Voltage and Current

When the power supply is set up in

Are Required

this manner, there may be a flickering

When power supply output requirements specify

between VOLT MODE and CUR MODE

both a constant voltage and a specific current

lamps when operating at the not to ex-

that is not to be exceeded, or both a constant

ceed value.

2-6