Note that when the source voltage is less than the
CV level, no current will flow due to a very high
impedance.
When the unit is set to CV mode it will operate as a
constant voltage load when connected to a
constant current source. This means the unit will
maintain a set voltage level, up to the rated power,
regardless of the input current. When the source
voltage is less than the CV level, no current will
flow due to a very high impedance. This is
illustrated below.