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THREE: OPERATING CHARACTERISTICS AND CONFIGURATIONS
3.1 INTRODUCTION
These sections contain information on operating characteristics and how to configure the PPS Series. Sections 3.2
through 3.4 consider the power supplies operating ranges, remote sense operation and considerations when
connecting loads.
The latter half of the chapter deals with connecting power supplies in parallel and series configuration for CC and
CV operation.
3.2 OPERATING RANGES
All power supplies operate in either constant voltage (CV) or constant current (CC) mode over the rated output .
Their respective voltage and current operating locus (figure F) are found in operating quadrants for all models. The
power supply acts as a constant voltage source for comparatively large values of load resistance and as a current
source for comparatively small values of load resistance. The automatic crossover or transition between these two
modes of operations occurs at a critical stage or "crossover" value of load resistance; R
c
= E
s
/I
s
, where E
s
is the
front panel voltage setting and I
s
the front panel current setting.
The followings are the operating quadrants (current -vs- voltage) of the power supplies.
V
I
V
I
V2 (Low)
V1 (High)
I1 (High) I2 (Low)
Vmax
Imax
PPS-1322/1302A/2322/1603/10710 PPS-1326
Figure G. Operating Quadrants
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