TM 11-6625-2965-14&P

5-69 REFERENCE CIRCUIT ADJUSTMENTS

5-70 Line Regulation. To adjust the line regulation capabilities of the instrument proceed as follows :

a . Connect the differential voltmeter between +S (positive) and 31 (common).

b. Connect variable voltage transformer between supply and input power source.

c.Adjust line to 105Vac.

d.Connect decade resistance in place of

R46.

e . Set range switch to high voltage mode and turn on supply.

f.Adjust decade resistance so that voltage indicated by differential voltmeter does not change more than 1.08 millivolts for 6204B and 6205B or

.946mV for 6206B as input line voltage is varied from 105 to 125Vac.

g. Replace decade resistance with appropri- ate value resistor in R46 position.

5-71 CONSTANT VOLTAGE TRANSIENT RECOVERY TIME

5-72 To adjust the transient response, proceed

as follows:

a . Connect test setup as shown in Figure

5-8.

b. Repeat Steps a through f as outlined in Paragraph 5-37.

c.Adjust R30 so that the transient response is as shown in Figure 5-9.

5-73 CURRENT LIMIT ADJUSTMENT

5-74 To adjust the current limit so that the supply can be used to furnish maximum rated output cur- rent, proceed as follows:

a.Connect test setup shown in Figure 5-5.

b.

Short out load resistor (Ry).

c . Set RANGE switch to low voltage (high

current)

mode.

 

d. Turn on supply and rotate VOLTAGE con-

trols fully clockwise

(maximum).

e .

Adjust R81

until differential volt meter

indicates 3.5Vdc for Models 6204B and 6205B supplies or 3.6Vdc for Model 6206B supply.

5-15