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d.
Reduce the resistance of the load to draw an output current of:
17.0Adc (6010A)
120Adc (6011A)
17.5Adc (6012B)
5.0Adc (6015A)
Check that the unit's CV LED remains lighted.
e.
Check that the rms noise voltage at the true rms voltmeter is no more than:
22mV rms (6010A)
8.0mV rms (6011A)
8.0mV rms (6012B)
50mV rms (6015A)
Peak Measurement Procedure. Figure 2-5 shows the interconnections of equipment to measure PARD in Vpp. The
equipment grounding and power connection instructions of PARD rms test apply to this setup also. Connect the
oscilloscope to the + OUT and - OUT terminals through 0.01µF blocking capacitors to protect the oscilloscope's input from
the unit's output voltage. To reduce common-mode noise pickup, set up the oscilloscope for a differential, two-channel
voltage measurement. To reduce normal-mode noise pickup, use twisted, 1 meter or shorter, 50Ω coaxial cables with
shields connected to the oscilloscope case and to each other at the other ends. Proceed as follows:
a.
Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to maximum.
b.
Turn the unit's power-on, and turn up current setting to full output.
c.
Turn up output voltage to:
60Vdc (6010A)
7.0Vdc (6011A)
20
Figure 2-4. RMS Measurement Test Setup, CV PARD Test
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Troubleshooting
