The three output modes of GPE-2323/3323/4323 
series, independent, series tracking and parallel 
tracking can be selected through pressing the 
TRACKING key on the front panel. In the 
independent mode, the output voltage and current 
of each channel are controlled separately. In the 
tracking modes, both the CH1 and CH2 outputs 
are automatically connected in series or parallel. 
CH1 is master and CH2 is slave; no need to 
connect output leads. In the series mode, the 
output voltage is doubled; in the parallel mode, 
the output current is doubled. The isolation 
degree, from output terminal to chassis or from 
output terminal to output terminal, is 500V 
Each output channel works in constant voltage 
(CV) or constant current (CC) mode. Even at the 
maximum output current, a fully rated, 
continuously adjustable output voltage is 
provided. For a big load, the power supply can be 
used as a CV source; while for a small load, a CC 
source. When in the CV mode (independent or 
tracking mode), output current (overload or short 
circuit) can be controlled via the front panel. When 
in the CC mode (independent mode only), the 
maximum (ceiling) output voltage can be 
controlled via the front panel. The power supply 
will automatically cross over from CV to CC 
operation when the output current reaches the 
target value. The power supply will automatically 
cross over from CC to CV when the output voltage 
reaches the target value. For more details about 
CV/CC mode operation, see page 24.