Operating Basis
20
Voltage and current calibration operation
Before enabling this function, it is necessary to prepare an electronic load. The
accuracy of this load is preferably ten times that of the DC power supply under test.
1 . Before performing the calibration, the output voltage of the power supply shall not be
lower than 5V, and the power supply shall be reliably connected with the electronic
load.
2 . Under the power-off state, press and hold the coarse and fine adjustment knobs of
the current. Then turn on the power switch to enter the calibration mode after waiting
for 3 seconds.
3 . If 0.00 Hl0 is displayed on the power supply, it indicates the low-side calibration of
the current measurement value.
4 . Press the coarse adjustment knob of the current for the starting point calibration of
the measurement value. Let the electronic load output 2mA under the constant
current (CC) mode. Press the coarse adjustment knob of the voltage to confirm.
5 . Press the fine adjustment knob of the current for high-side calibration of the
measurement value. If 5.05 Hh0 is displayed on the power supply, it indicates the
high-side calibration of the current measurement value.Let the electronic load output
5.05A under the constant current (CC) mode. Press the coarse adjustment knob of
the voltage to confirm.
6 . Press the fine adjustment knob of the voltage for the current limit value calibration
(0.01 HL1 is displayed). Press the coarse adjustment knob of the current for the
low-side starting point calibration of the constant current value. Set the electronic
load under the constant current (CC) mode and start it by outputting 6A. Adjust the
fine adjustment knob of the current. When the output current value on the electronic
load is 0.01A, press the coarse adjustment knob of the voltage to confirm.
7 . Press the fine adjustment knob of the current for the high-side end point calibration
of the constant current value (5.05 Hh1 is displayed on the power supply). Adjust the
coarse and fine adjustment knob of the current. When the output value on the
electronic load is 5.05A, press the coarse adjustment knob of the voltage to confirm.
8 . Disable the output of the electronic load. Press the fine adjustment knob of the
voltage for the constant voltage value calibration (HL2 00.1 is displayed on the power
supply).Press the coarse adjustment knob of the current for the starting point
calibration of the constant voltage value, and adjust the fine adjustment knob of the
voltage to change the power output.Let the electronic load display 0.1V, and press
the coarse adjustment knob of the voltage to confirm.
9 . Press the fine adjustment knob of the current for the high-side constant voltage value
calibration (HH2 32.5 is displayed on the power supply). Adjust the coarse and fine
adjustment knob of the voltage to change the output of the power supply. Let the
electronic load display 32.5V, and press the coarse adjustment knob of the voltage
to confirm.
10 . After waiting for 2 seconds, shut down and restart the power supply.
The calibration is completed.
