51
4.8.6
Constant Current Check (Blank Panel Power Supply)
1. Ensure that the front panel Power switch is at Off position and the DVM connected to the output
terminals shows zero voltage.
2. Connect a DC shunt across the output terminals.
3. Ensure that the shunt and the wires current ratings are higher than the power supply rating.
4. Connect a DVM to the shunt.
5. Connect a USB cable from a PC to J2 (USB interface connector). Refer to Table 2-3: Rear Panel
6. Turn the front panel Power switch to On position.
7. Run terminal communication software and send the following commands to turn power supply
output ON:
INST:NSEL 6
OUTP 1
* Remember to use Carriage Return after each command.
8. Ensure that the output current readback varies while sending CURR <YY> command. The control
range is from zero to the maximum rated output for the power supply model. Send MEAS:CURR?
command to read power supply output current.
9. * YY – Programmed current value.
10. Compare the DVM reading with the readback current to verify the accuracy of the digital
readback.
11. Turn off the front panel Power switch.
12. Remove the shunt from the power supply output terminals.