PS2520 Series Performance Verification
40
Handheld and Benchtop Instruments Basic Service
4. Ensure that the power supply output is disabled. Configure the DMM to
measure 10 amperes DC across the power supply front panel OUTPUT 2
terminals.
5. Press SHIFT
→ PARA/INDEP to configure OUTPUT 1 and OUTPUT 2 for
parallel operation. Verify that the “PARA” indicator lights up on the display.
6. Press OUTPUT ON/OFF. Verify that the “OUT” indicator lights up on the
display.
7. Verify that the DMM reads between 4.970 and 5.030 A.
8. Press CURRENT
or CURRENT to adjust the power supply output
current until the DMM reads 3.000 A.
9. Verify that the power supply CURRENT (A) readout indicates between
4.970 and 5.030 A.
10. Press CURRENT SET. Set the power supply output current to 0.1 A
11. Verify that the DMM reads between 0.089 and 0.111 A.
12. Press OUTPUT ON/OFF. Verify that the “OUT” indicator turns off.
13. Press SHIFT
→ PARA/INDEP to reconfigure the outputs for independent
operation. Verify that the “PARA” indicator turns off.
14. Disconnect the DMM from the power supply output terminals.
Complete the following procedures to verify OVP (overvoltage protection)
accuracy.
Outputs 1 and 2. Use the following steps to check the OUTPUT 1 and
OUTPUT 2 accuracy.
1. Press SHIFT
→ OUT 1; verify that the “1” indicator lights up on the display.
2. Press OVP SET and set the OVP to 22.6 V. Verify that the power supply
readouts display the error message “Err - 065”.
3. Press OVP SET again and set the OVP to 22.5 V. Verify that the power
supply readouts display no error message.
4. Set up the power supply as follows:
VOLTS SET 18 V
CURRENT SET .1 A
OVP SET 20 V
5. Press STEP SET. Set the VOLTS SET to 0.02 V.
Overvoltage
Protection Accuracy
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