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5) The power supply reserved 6 memory positions for voltage, current and OV levels. Use “SAVE” key to store the
current settings to one of the 6 memory locations, and you can use “RECL” key to recall one of the stored settings.
3-3 Constant Voltage / Constant Current Characteristics
The power supply is a regulated constant current / constant voltage (CC CV) power supply, and is characterized
by automatic crossover from constant current (CC) to constant voltage (CV), or vise versa, depending on the load
situation. At any moment, the power supply automatically determines whether to operate at CV or CC mode,
depending on the voltage and current limit set, and the load connected (if no load is connected, it simply means that
the load resistance is infinite, and if there is a short, the load resistance is zero.)
For example, if the load is such that the power supply is operating in the constant voltage mode (i.e., voltage limit
is lower than current limit for the load connected), a regulated constant voltage output is provided. The output voltage
remains constant as the load resistance decreases (i.e., current increases), up to the point that the preset current limit is
reached. At that point, the output current becomes constant and the output voltage drops in proportion to the further
decrease of the load resistance. The crossover point is reached when the voltage and current set points are reached
simultaneously. At the crossover point, the indicator changes from CV to CC.
Similarly, crossover from constant current to constant voltage mode automatically occurs when the resistance of
the load is increased. A good example of this is charging a 12V lead acid battery. Initially, the open circuit voltage of
the power supply may be set at 13.8V. A discharged battery may demand high charging current beyond the current