3: Constant voltage verification Series 2260B Programmable Power Supplies Verification and Adjustment Man
3-6 077104802 / November 2016
Before proceeding, make sure that the 2260B instrument is off.
To perform CV ripple and noise verification:
1. Connect the AC power supply to the 2260B.
2. Connect the DMM on the PCS-1000 directly across the +S and -S terminals to an electronic DC
load, as shown in the previous figure.
3. Turn on the 2260B and, if necessary, all of the other instruments.
4. On the oscilloscope, set the AC coupling to 20 MHz bandwidth, the scale to 10 mV Sampling
mode to average, and the measurement to peak-to-peak.
5. Press the Set button on your 2260B and program the power supply to output current to its
maximum value and the output voltage to its maximum rated value (see
Series 2260B available
models (on page 1-1)).
6. On the 2260B press the Output button. Let the oscilloscope run for 20 seconds in order to
generate enough measurement points. The result should not exceed the peak-to-peak limits in
the test record form.
7. Use the DMM to measure the RMS noise voltage using AC voltage (see next figure).
The result should not exceed the RMS limits in the test record form (see Verification test record forms
(on page 5-1) for the appropriate model, under CV ripple and noise - RMS).
Verifying CV ripple and noise is complete.
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