What do CC, CR, CP, CV mean?

CC, CP, CR, CV are the 4 basic operating modes of almost every H&H electronic load:

• Constant current (CC) operation: Independent of the applied input voltage, the load controls a constant current flow with the current setting value.
• Constant power operation (CP): Depending on the input voltage, the load regulates the current flow so that the power set remains constant.
• Constant resistance (CR) operation: Depending on the input voltage, the load regulates the current flow so that the set resistance remains constant.
• Constant voltage (CV) operation: In voltage mode, the load regulates the input voltage to the specified set point. This is done by adjusting the load current until the desired voltage is established by the DUT’s internal resistance or current limit.

QL series source sinks also have these 4 basic modes of operation.