INCOMING CONFIDENCE TEST
The 50/750 undergoes extensive checks
and adjustments at the factory and should
require no initial calibration. However, you
may wish to perform an incoming confi-
dence test as part of the incoming inspec-
tion on the instrument. This incoming
confidence test is intended to confirm that
the instrument was not damaged in transit.
Applying a test signal to the INPUT connec-
tor and measuring the signal at the OUT-
PUT connector constitutes a reasonable
incoming confidence test.
We recommend that you familiarize yourself
with the information in INSTALLATION
(page 4) and OPERATION (page 7) before
performing this test.
WARNING: Do not plug in the 50/750 or
turn it on until instructed to do so. An
electrical shock could result if this pre-
caution is not observed.
Incoming Confidence Test Procedure
The following test requires a DC voltage
reference and a digital voltmeter capable of
withstanding more than 1500 V at its input
terminals.
This test procedure is written for the 50/750
unit configured as a 0 to +1500 V amplifier
or as a -750 V to +750 V amplifier. To test
a 50/750 unit configured as a 0 to -1500 V
amplifier, substitute the value indicated in
parenthesis. Perform this test for each
channel.
1. Insure that the power switch is OFF
before beginning this test.
2. Plug the AC line cord into the AC line
cord receptacle on the rear panel.
3. Plug the 50/750 into a power source.
WARNING: Make no attempt to bypass
the ground prong in the AC line cord.
Any attempt to negate this safety feature
could result in an electrical shock.
4. Connect a digital voltmeter to the OUT-
PUT receptacle on the front panel. Turn
on the voltmeter.
5. Connect a +1 V (-1 V) reference supply
to the INPUT receptacle on the front
panel. Turn on the reference supply.
6. Turn on the 50/750 POWER switch.
7. Note the voltage on the digital voltmeter.
It must indicate +100 V (-100 V).
NOTE: The output voltage of 100 V
(-100 V) will be seen, given a gain
setting of 100 V/V. Readjustment of this
gain can be set using the front panel
GAIN adjustment control.
This completes the Incoming Confidence
Test. Turn off the POWER switch. Discon-
nect the reference power supply and the
digital voltmeter.
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