User`s guide

Chapter 3 Calibration Procedures

General Calibration/Adjustment Procedure

10 Read the DVM and change the high voltage value on the display to match the

measured voltage.

For example, if the DVM reads 19.495 V, adjust the voltage to 19.495 V using the

knob and arrow keys.

11 Pressing (Calibrate) key saves the new voltage calibration constants, and

goes to the OVP calibration mode.

A ‘‘CALIBRATING’’ message appears for one second to indicate that the voltage

calibration is progressing and new voltage calibration constants of ‘‘SETUP 1’’ are

stored. Then, the display shows above message to indicate that the power supply is

ready for the OVP calibration.

If the calibration fails, a ‘‘DAC CAL FAIL’’ or ‘‘ADC CAL FAIL’’ message appears

for one second and the display shows the ‘‘CAL SETUP 1’’ for voltage calibration

again.

Current and OCP Calibration

12 Pressing (Calibrate) key saves the new calibration constants for OVP

circuit and goes to the current calibration mode.

A ‘‘CALIBRATING’’ message appears for about several seconds to indicate that the

OVP calibration is progressing and new calibration constants of ‘‘SETUP 2’’ are

stored. Then, the display shows the above message to indicate that the power supply

is ready for the current calibration.

V HI 19.495 V

CAL SETUP 2

CAL SETUP 3

Connect an appropriate shunt 0.01 Ω across the output terminals, and connect a

digital voltmeter across the shunt resistor for the current calibration.

Error

Calibrate

Error

Calibrate

Error

Calibrate

Error

Calibrate