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SECTION III
OP:::RATING INSTRUCTIONS
61778 DC CURRENT SOURCE
HEWlETT<>PACK,o..RD D-50V
Figure 3-1.
Operating Controls and Indicators
3-1
TURN-ON CHECKOUT PROCEDURE
3-2
The following checkout procedure describes
the use of the front panel controls and indicators
and ensures that the meter and programming cir-
cuits are operable.
Actual outpu: current should
be checked with an external ammeter before con-
necting delicate loads.
a.
Set line/meter switch (1) to VOLTS and
observe that UNE light (2) goes on.
b.
To select voltage limit, adjust VOLTAGE
control (3) until front panel meter (4) indicates
desired output voltage (no load connected).
c.
VOLTAGE UMIT lamp (5) sho.uld be on
with
no
load connected.
d.
To select constant current
output.
tum-
off"supply and short
+
and - output terminals (front
3-1
or rear).
e.
Set switch (1) to AMPS and select de-
sired output current range with range switch (6).
Adjust CURRENT control
(7)
for desired output cur-
rent.
=.
Remove short and connect load to output
termina Is (front or rear).
3-3
OPERATING MODES
3-4
The power supply is designed so that its
mode of operation can be selected by making
strapping connections between particular terminals
on the terminal strips at the rear of the power sup-
ply.
The terminal designations are stenciled in
white on the power supply above or below their
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