Agilent Technologies 6632B, 6634B, 66332A, 6633B Performance Test Equipment Form, CC Noise PARD

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 2-1a. The Current Monitoring resistor may have to be substituted by one with a higher resistance and power rating, such as a 1 ohm 50 W current shunt in series with the appropriate 3, 24, or 99 ohm resistor, to get the RMS voltage drop high enough to measure with the RMS voltmeter. Leads should be as short as possible to reduce noise pick-up. An electronic load may contribute ripple to the measurement so if the RMS noise is above the specification a resistive load may have to be substituted for this test.

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 ____________________
Special Notes:

Test Equipment Used:
Description	Model No.	Trace No.	Cal. Due Date
AC Source	_________________	_________________	_________________
DC Voltmeter	_________________	_________________	_________________
RMS Voltmeter	_________________	_________________	_________________
Oscilloscope	_________________	_________________	_________________
Electronic Load	_________________	_________________	_________________
Current Shunt	_________________	_________________	_________________
	_________________	_________________	_________________

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