2005

(6)

Set the output voltage to the desired value, using the

front panel dials. Set the VERNIER control to zero if

interpolation between 1 millivolt steps is not desired.

(7)

Connect the DC+ and DC- terminals (on the front or rear

panel) across the load. If desired, connect the positive

or negative output terminal to ground.

b.

Sensing . The regulator circuit maintains the potential between

the sense leads (s+ and S-) at the set output voltage. When these leads

are connected to the positive and negative output terminals, the power

source is connected for local sensing. When the sense leads are connected

to the load, the source is connected for remote sensing. Remote sensing

is used when an appreciable voltage drop is anticipated in the leads

connecting the positive and negative output terminals to the load. The

Model 2005 is connected for local sensing when shipped from the factory.

For remote sensing, proceed as follows:

(1)

Remove the shorting links from between the rear panel DC+

and S+ terminals and from between the DC- and S- terminals.

(2)

Connect the DC+ and DC— leads across the load.

(3)

Connect the S+ and S— leads to the positive and negative

sides of the load, respectively. Run the sense leads as

a tightly twisted, shielded pair. Connect the shield to

the G (chassis ground) terminal to minimize output ripple

(4)

Turn on the Model 2005.

c.

Series Operation . As many as four Model 2005 units may be con-

nected in series to provide up to 80 volts. Connect the positive DC

output terminal of one supply to the negative output terminal of the next,

in the same manner as connecting batteries in series. The ground terminals

on all units may be left floating or they may be tied together and con-

nected to either the most positive or most negative output terminal.

To insure optimum voltage regulation, disconnect the shorting

links between all S+ and DC+ output terminals except those at the most

positive potential. Then connect jumper wires between each S+ terminal

and the S- terminal on the next more positive power source. In this way

the voltage drops in the leads connecting the power sources will be

compensated for by the regulator circuits of the individual units. For

remote sensing, proceed as directed above, except connect the most posi-

tive and most negative S+ and S- leads across the load.

d.

Remote Voltage Programming . The output voltage can be programmed

remotely by an external fixed or variable resistance. Proceed as follows:

(1)

Turn off the power source, set all output voltage controls

to zero and set the RANGE switch to 0 —10V.

(2)

Remove the shorting link from between the rear panel RV

and S+ terminals.

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