Kikusui PCZ1000A, Operation Manual, Page: 92 / 100

A-4
PCZ1000A
A.1.2 Explanation of Operating Mode
Constant-Current (CC) Mode
In Constant-current (CC) mode, it maintains a constant current regardless of
changes in the voltage.
The PCZ1000A operates as a constant-current load as shown in Fig.A-4 within the
operating range shown in Fig.A-1. The RMS value of the input current (I) is
maintained at the specified value regardless of changes in the input voltage.
Fig.A-4 CC Mode
Transition points in CC mode operation
In Fig.A-5 below, the line A-B represents operation in CC mode and the line B-C
represents operation in CP mode. As the RMS value of the input voltage (V1)
increases, the operating point of the PCZ1000A moves upwards from point A in CC
mode. Operation changes to CP mode when the operating point reaches point B.
Further increases in V1 cause the current to decrease (see the above explanation of
CC mode operation). When the operating point is on line 0-A, the internal
PCZ1000A senses as if it were operating in CC mode.
Fig.A-5 Transition Points in CC Mode Operation
rms value of the input
current I
rms value of the input voltage V
0 5 10 (A)
I
rms value of the input current
rms value of the input voltage V1
0
Set value in the CP mode
(PSET value)
Maximum
voltage
Maximum current
Set value in the CC mode
(ISET value)
C
A
B