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SECTION III
OPERATING INSTRUCTIONS
Figure 3-1. Front Panel Controls and Indicators
3-1
TURN-ON CHECKOUT PROCEDURE
3-2
The following steps describe the use of the front
panel controls and indicators illustrated in Figure 3-1 and
serve as a brief check that the supply is operational. This
checkout procedure or the more detailed performance
test of paragraph 5-5 should be followed when the instru¬
ment is received and before it is connected to any load
equipment. Proceed to the more detailed test and trouble¬
shooting procedures in Section V if any difficulties are
encountered.
a. Turn CURRENTcontrols
(7)
and OVERVOLTAGE
ADJUST potentiometer (5) fully clockwise and check
that rear panel straps are connected as shown in Figure 3-2,
but do not connect load R^.
b. Connect ac power of the appropriate voltage and
frequency to the rear panel ac and acc terminals. The
supply's input rating is identified on its rear panel.
-CAUTION-
Do not interchange the ac and acc input lines;
connect the ac input terminal to the hot side
and the acc input terminal to the grounded
side of the ac line. Do not fail to connect the
input ground terminal < ± ) securely to an
external earth ground.
c. Set LINE switch or circuit breaker (7) ON and
observe that pilot lamp (2) lights.
d. Adjust COARSE and FINE VOLTAGE controls @
for desired indication on voltmeter ©
e. Ensure that overvoltage crowbar circuit is operational
by slowly turning OVERVOLTAGE ADJUST control
©
counterclockwise with a screwdriver until OVERVOLTAGE
lamp © lights and voltmeter indication drops to zero
volts.
3-1
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