Hoefer PS200HC - Manual (Page 15)

Parameter overview
Power parameters
Because the power output limit is 200 W, and
W = V × A, the maximum current of 2.0 A
can be delivered only if voltage is ≤100 V.
Conversely, the maximum voltage of 200 V can
be delivered only if the current is ≤1.0 A.
Programmed limits
Variable Range Increment
Voltage 5 – 200 V 1 volt
Current 0.01– 2.00 A 0.01 amp
Time 0 – 999 minutes 1 minute
Timer = 0 = continuous run
Timer = 1 – 999 = timed run in minutes
Power supply output limits
The PS200HC can be programmed to limit volt-
age (V) or current (A). The power supply will
operate at the set limit provided the “load,” or
power requirement, does not exceed the power
supply rating.
“Crossover” occurs when the second parameter
limit is reached as system resistance changes
(Fig 3). At this point, the second parameter
becomes constant, and the previously unchang-
ing param eter adjusts downward as system
resistance changes. (System resistance is affected
by discontinuous buffers, changes in tempera-
ture, and buffer depletion.) When the power
supply is delivering power, the light above the
CONSTANT button indicates which parameter
is being held constant.
•
p5
Please note the following power
output limitations:
• The maximum current of
2.0 A is available at 100 V
or less.
• The maximum voltage setting
of 200 V is available at 1.0 A
and less.
Note: In most cases, only one
parameter can be held constant
at a time.