•
p1
Note:
The four pairs of output
jacks always operate at the
same voltage.
The sum of the current of all
four outputs is displayed. This
value can never exceed 500 mA.
Power supply function
and description
The Hoefer
®
PS300B power supply can be used
with many electrophoresis applications, such
as running standard PAGE gels, multiple PAGE
minigels, horizontal agarose gels, semidry trans-
fer and minigel tank transfers. The LED display
reports power supply status. Parameters are set
by pressing UP/DOWN arrow buttons in combi-
nation with a SELECT button. Four pairs of
output jacks accept 4 mm plugs, which operate
in parallel. The output jacks are color coded,
recessed for safety, and accept 4 mm shielded
(banana) plugs that come standard with most
Hoefer equipment.
The user interface consists of a three digit,
LED readout, and five buttons on a membrane
keypad. Diagrams of the front and rear panel
are shown on the following pages.
The PS300B operates in constant voltage or
constant current modes. Power output is
controlled by setting a maximum value for volt-
age (up to 300 V), or current (up to 500 mA).
The maximum output power at any time is
90 Watts. Run duration can be continuous or
programmed to a maximum duration of
999 minutes.