Kikusui PLZ-4W Series, User Manual

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PLZ-4W For First Time Users 3-7
3.4 Basic Operation Modes
The following six operation modes are available on the PLZ-4W.
1. Constant current mode (CC mode)
2. Constant resistance mode (CR mode)
3. Constant power mode (CP mode)
4. Constant voltage mode (CV mode)
5. Constant current and constant voltage mode (CC+CV mode)
6. Constant resistance and constant voltage mode (CR+CV mode)
Below is a description of the most basic CC mode. For a detailed description, see
appendix A.2, “Basic Operation Modes.”
3.4.1 Operation of the CC Mode
In CC mode, the current is kept constant even when the voltage changes.
■
CC mode operation
When the PLZ-4W is used in CC mode, the PLZ-4W operates as a constant current
load as shown in Fig. 3-4. The PLZ-4W sinks the speci
fi ed current (I) independent
of the output voltage of the constant-voltage power supply (V1).
Fig. 3-4 Equivalent circuit of the constant current load and operation
■
Transition of the operating point
We will consider the case when checking the load characteristics of the constant-
voltage power supply of Fig. 3-4 using CC mode.
I
V
Current is constant
even when the voltage
changes
0
CC setting value
PLZ-4W Series
Electronic Load
Constant-voltage
power supply
V1
Current [A]
R1
Voltage [V]