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Technical description 4
9
Electrophoresis Power Supply EPS 301 User Manual 18-1130-18 Edition AC
4.1 Materials
The main components in the EPS 301 power supply are made of the following materials.
Instrument box
Aluminium
Display holder
Polypropene (PP). UL94V0
Keyboard Polyester
Output sockets
Acetalplastic (POM). UL94V0
Rubber feet
Polyurethane
4.2 Front
panel
On the front panel there is a numerical display illustrated with the symbols, V, mA, and
h.m., a keyboard with six membrane keys, a light emitting diode that lights when voltage
is applied (HV on) and output sockets for two electrophoresis units.
4.3 Display
A four digit numeric display guides you through the programming, shows actual
parameter values during the electrophoresis and final parameter values afterwards. It
also shows error messages.
Figure 1, inside front cover, shows the display in the End position when power is switched
on.
4.4 Keyboards
SET/ENTER
Puts the instrument into its program mode. Pressing SET/ENTER in the program mode
enters a value, if valid, and moves the program to the next parameter.
In the RUN mode, pressing SET/ENTER allows you to make changes in the program
during a run.
Valid values are: voltage 5–300 V, current 10–400 mA, time 0.01–23.59 h, or timer
off - - - -.
UP/DOWN
Changes the parameter value V, mA, and h.m. when the display is flashing. Numerical
values are changed in an accelerating manner when the key is held down. Clicking
/
changes the value in pre-set increments. The values will automatically change from
maximum to minimum value or vice versa, except for the time (h.m.) where the
signs - - - - are placed between the minimum and maximum values indicating that the
timer is switched off.
4 Technical
description
set
enter
/
