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SECTION ill
DERATING INSTRUCTIONS
Figure 3-1. Bipolar Power Supply/Amplifier, Models 6826A and 6827A, Rear View
3-1
INTRODUCTION
3-2
This section describes the operating controls and
indicators, the turn-on checkout sequence, and operating
modes of Bipolar Power Supply/Amplifier (BPS/A) models
6826A and 6827A. Local and remote programming opera¬
tions are also described.
3-3
REAR TERMINALS AND AC INPUT
3-4
The Bipolar Power Supply/Amplifier (BPS/A) is
shipped with the rear terminals strapped for local program¬
ming (using front pane! controls) as shown in Figure 3-1.
Remote programming strapping requirements are described
in subsequent paragraphs. The power module contains fuse
FI (2A for 115Vac or 1A for 230Vac) and a slide switch for
connecting 115Vac or 230Vac input power to the instru¬
ment. To turn on the BPS/A, set the LINE switch (item
(T) , Figure 3-2) to ON. The LINE ON indicator
(2)
should light. Fuse FI protects the main power supply. At
initial turn-on, an interna! circuit protects any loads con¬
nected to the BPS/A from turn-on transients by shorting
the output terminals and disabling the BPS/A's power out¬
put circuits. This circuit operates similarly at turn-off to
protect any loads from turn-off transients.
3-5
OPERATING CONTROLS AND
INDICATORS
3-6
MODE SWITCH
3-7
The MODE switch
@
allows the BPS/A to oper
ate as a power supply, variable gain amplifier, or a fixed gain
amplifier. In the power supply operation, the BPS/A pro¬
vides a variable bipolar dc output voltage dependent upon
the RANGE switch (4)
and VOLTAGE control
(§)
settings. The dc output voltage ranges are as follows:
3-1
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