PS2520 Series Performance Verification
Handheld and Benchtop Instruments Basic Service
29
Parallel Operation. Use the following steps to check the parallel mode output
accuracy.
1. Keep the power supply set to OUT 2. Press SHIFT
→ PARA/INDEP to
configure OUTPUT 1 and OUTPUT 2 for parallel operation. Verify that the
“PARA” indicator lights up on the display.
2. Set the DMM to measure 5 amperes DC.
3. Set up the power supply as follows:
VOLTS SET 36 V
CURRENT SET 3.0 A
OVP SET 38.5 V
4. Repeat steps 5 through 14 of the Outputs 1 and 2 procedure above but verify
that the difference between (I1) and (I2) is ≤0.006 A.
5. Repeat steps 15 through 18 of the Outputs 1 and 2 procedure above.
6. 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 5.
3. Set up the power supply as follows:
VOLTS SET 6 V
CURRENT SET 3.0 A
OVP SET 7 V
4. Repeat steps 5 through 18 of the Outputs 1 and 2 procedure above.
5. Disconnect the DMM and electronic load from the instrument.
Complete the following procedures to verify constant current source accuracy.
Outputs 1 and 2. Use the following steps to check the OUTPUT 1 and
OUTPUT 2 accuracy.
1. Set up the Variac. Connect the power supply AC input to the Variac variable
output. Allow 20 minutes for the power supply to warm up and stabilize.
Constant Current
Source Accuracy
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