PS2520 Series Performance Verification
22
Handheld and Benchtop Instruments Basic Service
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
→ PARA/INDEP to reconfigure the outputs for independent
operation. Verify that the “PARA” indicator turns off.
15. Disconnect the DMM and electronic load from the instrument.
Output 3. Use the following steps to check the OUTPUT 3 accuracy.
1. Press SHIFT
→ OUT 3; verify that the “3” 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 3 terminals. Maintain the
equipment configuration and polarities shown in Figure 2.
3. Set the DMM to measure 10 VDC.
4. Set up the power supply as follows:
VOLTS SET 6 V
CURRENT SET 3.1 A
OVP SET 7 V
5. Press OUTPUT ON/OFF. Verify that the “OUT” indicator lights up on the
display.
6. Enable the electronic load. Adjust the load until the power supply
CURRENT (A) readout indicates 3.000 A.
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 3 terminals and connect them to OUTPUT 3 on the
rear of the instrument. Maintain the equipment configuration 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. Disconnect the DMM and electronic load from the instrument.
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