Keithley 2280S-32-6 - Page 392

Appendix B: Verification Series 2280 Precision DC Power Supply Reference Manual
B-26 077085503 / March 2019
To check DC voltage line regulation:
1. Change the AC power source output to the minimum voltage specified in the following table.
DUT voltage selector switch
AC source voltage
100
90 V
120
108 V
220
198 V
240
216 V
Make sure the warm-up criteria have been met, as described in the Performance verification
conditions.
2. Set the voltmeter as follows:
 Set to measure DC voltage.
 Set the current range to autorange.
 Verify that the Math mx+b function is disabled (shift DCV), ensuring that voltage is being read.
3. Set the electronic load as follows:
 Set to constant current (CC) mode.
 Set to draw the specified test current.
Model
Test current
2280S-32-6
3 A
2280S-60-3
1.6 A
4. Set the device under test (DUT) to 100% of the full-scale output current.
5. Set the DUT to 100% of the full-scale output voltage.
6. Turn the DUT output on.
7. Enter the voltmeter reading in the DC voltage line regulation (on page B-7) table under the Min
column for your product.
8. Change the AC power source output to the maximum voltage specified in the following table.
DUT voltage selector switch
AC source voltage
100
110 V
120
132 V
220
242 V
240
264 V
9. Enter the voltmeter reading in the DC voltage line regulation (on page B-7) table under the Max
column for your product.