Verification and Performance Tests - 2
CC Noise (PARD)
Periodic and random deviations (PARD) in the output combine to produce a residual ac current, as well, as an ac voltage superimposed on the dc output. Constant current (CC) PARD is specified as the rms output current in a frequency range 20 Hz to 20 Mhz with the supply in CC operation.
a.Turn off the supply and connect the load, monitoring resistor, and rms voltmeter across the monitoring resistor as shown in Figure
b.Check the test setup for noise with the supply turned off. Other equipment (e.g. computers, DVMs, etc.) may affect the reading.
c.Turn on the supply and program the current to full scale and the output voltage to the maximum programmable value.
d.The output current should be at the full scale rating with the CC annunciator on.
e.Divide the reading on the rms voltmeter by the monitor resistor to obtain rms current. It should not exceed the values listed in the performance test record card under CC NOISE (RMS).
Performance Test Equipment Form
Test Facility:_________________________ | Report Number ________________________ |
____________________________________ | Date _________________________________ |
____________________________________ | Customer _____________________________ |
____________________________________ | Tested By ____________________________ |
Model ______________________________ | Ambient Temperature (C) ________________ |
Serial No. ____________________________ | Relative Humidity (%) ___________________ |
Options _____________________________ | Nominal Line Frequency __________________ |
Firmware Revision ____________________ |
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Special Notes: |
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Test Equipment Used: |
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Description | Model No. | Trace No. | Cal. Due Date |
AC Source | _________________ | _________________ | _________________ |
DC Voltmeter | _________________ | _________________ | _________________ |
RMS Voltmeter | _________________ | _________________ | _________________ |
Oscilloscope | _________________ | _________________ | _________________ |
Electronic Load | _________________ | _________________ | _________________ |
Current Shunt | _________________ | _________________ | _________________ |
| _________________ | _________________ | _________________ |
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