PS2520 Series Performance Verification
Handheld and Benchtop Instruments Basic Service
25
8. Press OUTPUT ON/OFF. Verify that the “OUT” indicator turns off; then
disable the electronic load.
9. Press SHIFT
→ PARA/INDEP to reconfigure the outputs for independent
operation. Verify that the “PARA” indicator turns off.
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 3.
3. Set up the power supply as follows:
VOLTS SET 6 V
CURRENT SET 3.1 A
OVP SET 7 V
4. Press OUTPUT ON/OFF. Verify that the “OUT” indicator lights up on the
display.
5. Enable the electronic load. Adjust the load until the DMM current reads
3.000 A.
6. Adjust the output of the Variac from 108 to 132 VAC (120 V range) or 198
to 242 VAC (220 V range). Verify that the power supply VOLTS readout
changes ≤0.003 V over the adjustment range.
7. Press OUTPUT ON/OFF. Verify that the “OUT” indicator turns of; then
disable the electronic load.
8. Disconnect the DMM and electronic load from the instrument.
Complete the following procedures to verify constant voltage ripple and noise
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. Ensure that the power supply output is disabled. Connect the oscilloscope
and 27 W 100 W resistor to the front panel OUTPUT 1 terminals. See
Figure 4 for details.
Constant Voltage
Ripple and Noise
Accuracy
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