50
4.8.4
Constant Voltage Check (Blank Panel Power Supply)
1. Connect a USB cable from a PC to J2 (USB interface connector). Refer to Table 2-3: Rear Panel
2. 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 character (ASCII 13, 0x0D) after each command.
3. Ensure that the output voltage varies while sending VOLT <XX> command. The control range is
from zero to the maximum rated output for the power supply model.
4. * XX – Programmed voltage value.
5. Compare the DVM reading with the power supply readback voltage to verify the accuracy of the
voltage readback. Send MEAS:VOLT? command to read power supply output voltage.
6. Turn off the front panel Power switch.
4.8.5
Constant Current Check (Standard 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. Turn the front panel Power switch to On position.
6. Turn on the output by pressing the OUT button so the OUT LED illuminates.
7. Observe the power supply Current display and rotate the Current encoder.
8. Ensure that the output current varies while the Current encoder is rotated. The minimum control
range is from zero to the maximum rated output for the power supply model.
9. Compare the DVM reading with the front panel Current display to verify the accuracy of the
Current display.
10. Ensure that the front panel CC indication on the LCD screen is active.
11. Turn off the front panel Power switch.
12. Remove the shunt from the power supply output terminals.
