Keithley 2220-30-1 - Page 56

Performance Ve rification
7. Increase the el
ectronic load to the Reference test voltage level.
Channel
under test Reference tes
t voltage
Channel 1
15.0 V
Channel 2
15.0 V
Channel 3
3.0 V
8. Enter the voltmeter reading into the table for checking current load regulation
at the ref erence test voltage the CUT. (See Table 23 on page 22.)
9. Increase the electronic load to the Maximum test voltage level.
Channel
under test Maximum test voltage
Channel 1
29.4 V
Channel 2
29.4 V
Channel 3
5.88 V
10. Enter the voltmeter reading into the table for checking current load regulation
at the maximum voltage for the CUT. (See Table 23 on page 22.)
11. Calculate the two values: REF – Min and Max – REF. Enter the values into
the appropriate columns. (See Table 23 on page 22.)
12. Select the larger of the two calculated values from step 11 and enter the value
into the Largest column. (See Table 23 on page 22.)
13. Power off the DUT and test equipment.
This completes the check for one channel. If needed, return to step 1 to run
through the check for the next channel.
46 Series 2200 Multichannel Programmable DC Power Supplies Technical Reference