Hoefer PS300B Manual De Usuario página 19

Note: The power supply slowly
increases to the set value when
starting a run.
The constant parameter can be
adjusted during a run.
•
p10
All manuals and user guides at all-guides.com
5
Start the run. Press the START/STOP button. The
green light above the START/STOP button indicates
that voltage and current are being applied to the
output jacks. The green light above the CONSTANT
button indicates which parameter (V or A) is limiting,
and constant. The LED display shows the numerical
value of the actual V or A output, or the time (press
the SELECT button to toggle between the values).
6
In the case of a continuous run, press START/STOP to
terminate the run. The LED display reads "OFF".
A timed run automatically stops with a warning beep.
The word "OFF", and the conditions at the end of the
run are flashed on the display so that the user can
record the end conditions.
Pushing the SELECT button will return the power
supply to the last run settings.
Pressing the CONSTANT button will reset the power
supply.
Example: Set up conditions for running 2 minigels,
each at a constant current of 30 mA.
1 Press the CONSTANT button to position the
indica tor light under "A".
2 Press the UP and DOWN buttons to set the LED
display value 60. (2 minigels × 30 mA each).
3 Press the SELECT button to position the indicator
light under "V". Observe that the volt limit has
been automatically set to the maximum value of
300 V.
Setting the voltage limit to the maximum setting
ensures that the entire separation is run at 60 mA
for as long as possible. Should the buffer or gel
lose too much conductivity during the run, the
opera tional 300 V or 90 W limits may be reached,
at which point "crossover" automatically occurs
and V becomes the limiting variable. The current
would slowly drop below 60 mA at this point.