KORAD KKG305 Calibration Procedure

KKG305 Power Supply Calibration Procedures
Equipment to be prepared:
Electronic Load 1PC and Multimeter 1 PC with accuracy range – multimeter voltage
30V-1mV and load current 5.5A-0.01mA.
Calibration Procedures:
As for KKG series unit, press and hold the button M4 to turn on the POWER
switch to enter the calibration mode, and the voltage and current display is
approximately 0.
1. Verify the minimum voltage value of the power supply:
Method: at the beginning of calibration, the default is the minimum voltage
calibration of the power supply. At this time, the voltage LED display is 00.00.
Rotate the knob to make the voltage display on the multimeter of the output
terminal of the power supply as 5mv-8mv and then stop rotating. After that,
press M4 to save (at this time, the default step value of the knob adjustment is
about 0.5mv. And you can also increase the step value by pressing the left and
right keys to facilitate adjustment).
2. Check the minimum current value of the power supply:
Method: after finishing procedure 1 (saved), press Current （→） adjustment button,
and then the voltage display of the power supply is 5.2V, and current display is 0.
Enter the multimeter current gear (milliamp display gear) or the current mA
gear of the electronic load, and then rotate the adjustment knob. When the
connected multimeter or load current shows 0.5mA to 0.8mA, stop rotating the
knob. Press M4 to save.
3. Check the maximum voltage value of the power supply:
Method: after saving in the previous procedure, remove the ammeter and turn
off the electronic load. Connect the voltmeter. And press M1 to switch to the
maximum voltage value of the verified power supply. At this gear, the voltage
display on the LED display is 30.00 (as for the power supply models with 60V
output, the voltage display is 60.00). Then rotate the knob to adjust. When the
multimeter display connected with the power supply output terminals is 30V (as
for 60V models, the maximum calibrated value is 60.00V), stop rotating the knob.
Press M4 to save.
4. Check the maximum current value of the power supply: