Chapter 3
Operations
3.1 Ground Connection
Depending on the application, the power supply output terminals can be grounded in any one of the following
grounding conditions:
Negative ground black (-) negative terminal is shorted with green GND terminal.
Positive ground red (+) positive terminal is shorted with green GND terminal.
Floating ground green terminal is not shorted with any of the output terminals.
Remarks:
When operating this power supply as a floating ground, high impedance leakage can exist between the power
supply circuitry and the chassis ground.
3.2 Basic Mode of Operation
This power supply is designed to operate as a constant voltage source or as a constant current source. Automatic
crossover to either mode of operation occurs when the load condition changes as following:
Voltage value seing: at first, you must press the (4) keypad, then you can adjust the voltage value to your
desired value by (6) and (7) keypad.
Current value seing: at first, you must press the (5) keypad, then you can adjust the current value to your
desired value by (6) and (7) keypad.
3.3 Constant Voltage (CV), Automatic crossover & Constant Current (CC)
The power supply functions as a constant voltage source (CV) as long as the load current is less than the preset
current limiting value. When the load current is equal to or greater than the preset current limiting value, the
power supply will automatically cross over to the constant current mode, voltage will drop, (CC) will show on the
LCD display panel and it will operate as a constant current source.
When the load current drops below the preset current limiting value, the supply returns to constant voltage (CV)
mode.
3
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