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Chapter 4 Panel Operation
4.1 Basic Operation Mode
There are four operation modes for the DC electronic load:
1. Constant Current (CC)
2. Constant Voltage (CV)
3. Constant Resistance (CR)
4. Constant Power (CW)
4.1.1 Constant Current Operation Mode (CC)
In this mode, the DC electronic load will synchronize with a current in accordance with the
programmed value regardless of the input voltage. Please refer to Diagram 4.1. If the maximum current
value of the power supply under test is lower than the constant current value set, the electronic load might
fail to automatically adjust to these levels. Accordingly, the constant current and voltage of the measured
power supply should be adjusted lower..
Load current
I
V
Load voltage
Current Set
Load current
I
V
Load voltage
Current Set
Diagram 4.1 Constant Current Mode
4.1.1.1 Setup a Standard Constant Current Mode
Press the I-SET key and the VFD display will show STANDARD CURR=xxxxxxxxA, the present
constant current value. Press the numeric keys and decimal point key to enter the constant current value
desired, followed by pressing the Enter key to confirm the setting. - The DC Electronic Load load will
now be inthe standard constant current mode.
If the input state is in OFF state, then the word OFF will appear in upper right corner of the VFD
display. Press the On/Off key to change the load's input state to an ON state. Now CC or Unreg will
appear in the upper rightcorner of the VFD display. . Displaying CC means the load has been successfully
set with the expected constant current value; if Unreg is displayed,the load couldn’t adjust itself to the
constant current value that was entered. Please check to determine whether or notthe power supply under
test has the proper connections and has been turned on;also check to make sure that the desired constant
current value is within the range of the power supply under test.
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