PS2520 Series Performance Verification
20
Handheld and Benchtop Instruments Basic Service
7. Record the DMM voltage (V1).
8. Turn off the electronic load and record the DMM voltage again (V2).
9. Verify that the difference between V1 and V2 is ≤6 mV.
10. Press OUTPUT ON/OFF. Verify that the “OUT” indicator turns off.
11. Ensure that the power supply output is disabled. Remove the leads from the
front panel OUTPUT 1 terminals and connect them to the OUTPUT 1
terminals on the rear of the instrument. Maintain the equipment configura-
tion and polarities shown in Figure 2.
12. Repeat steps 5 through 8 above and verify that the difference between V1
and V2 is ≤3 mV.
13. Press OUTPUT ON/OFF. Verify that the “OUT” indicator turns off.
14. Press SHIFT
→ OUT 2; verify that the “2” indicator lights up on the display.
15. Ensure that the power supply output is disabled. Connect the DMM and
electronic load to the front panel OUTPUT 2 terminals. Maintain the
equipment configuration and polarities shown in Figure 2.
16. Repeat steps 4 through 10 above.
17. Ensure that the power supply output is disabled. Remove the leads from the
front panel OUTPUT 2 terminals and connect them to the OUTPUT 2
terminals on the rear of the instrument. Maintain the equipment configura-
tion and polarities shown in Figure 2.
18. Repeat steps 5 through 8 above and verify that the difference between V1
and V2 is ≤3 mV.
19. Press OUTPUT ON/OFF. Verify that the “OUT” indicator turns off.
20. Disconnect the DMM and electronic load from the instrument.
Series Operation. Use the following steps to check the series mode output
accuracy.
1. With the power supply set to OUT 2, press SHIFT
→ SERIES/INDEP to
configure OUTPUT 1 and OUTPUT 2 for series operation. Verify that the
“SERIES” indicator lights up on the display.
2. Ensure that the power supply output is disabled. Connect the DMM and
electronic load to the front panel OUTPUT 2 (+) and OUTPUT 1 (–)
terminals. Maintain the equipment configuration and polarities shown in
Figure 2.
3. Perform steps 5 through 8 of the Outputs 1 and 2 procedure above.
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