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Press the ENTER key when finished with the offset adjustment to proceed to the DC gain test,
which is announced by the message DC GAIN TEST XXXXX. XXXXX is the measurement
reading obtained when the precision 100-mV reference is applied to the measurement amplifier
input. A reading of 14,700 +300 indicates correct DC operation.
Press the ENTER key when finished with the DC gain test to proceed to the AC gain test, which is
announced by the message AC GAIN TEST XXXXX. XXXXX is the measurement reading
obtained when the precision 100-mV reference is applied to the measurement amplifier input. A
reading of 10,500 +200 for current or 6900 +200 for voltage indicates correct AC operation.
Press the ENTER key when finished to proceed to the overload test, which is announced by the
message OVERLOAD TEST XXXXX. XXXXX is the measurement reading obtained when the
output of the overload circuit is applied to the measurement amplifier input. A reading of less
than 1000 indicates correct operation.
If the Current tests are being performed, the display will show AMP OFFSET TEST XXXX after
pressing ENTER. The reading XXXX is a measurement of the output amplifier offset and should
be less than 400.
Press the ENTER key when finished to proceed to the output range tests, indicated by the range
messages, for example RANGE 1 XXXXX. XXXXX is the measurement reading obtained when
the current or voltage output is applied to the measurement amplifier input. A reading of less than
700 is obtained initially. The output current or voltage is under manual control and may be
adjusted up or down through the use of the MODIFY keys. The display shows the amplitude
control setting while a MODIFY key is pressed. Control settings of 0 to 4095 are available and
increment or decrement in steps of 100. The display reverts to the output reading when a
MODIFY key is released. The output may be turned "on" or "off" by use of the OPER and STBY
keys. Pressing the STBY key not only turns "off" the output but also returns the amplitude control
setting to 0. The range tests are useful for observing measurement values and analog circuit
performance in a static mode without the complexities of processor feedback control. Press the
CURRENT or VOLTAGE key when finished with a range test to proceed to the next range.
CAUTION
Take care not to exceed full-scale outputs for a given range. Control is entirely manual. Overload
operation and processor feedback controls are disabled during the range tests. If difficulties occur
press the RESET key to exit the test and return to normal operation.
The following is a table of typical values for full-scale range settings:
Current Settings
RANGE FULL SCALE OUTPUT MODIFY VALUE OUTPUT VALUE
1 1 mA 2600 15340
2 10 mA 2600 15340
3 100 mA 2500 14750
4 1 A 2600 15200
5 10 A 2600 15200
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