4 Technical
description
4.1 Front panel
The front panel consists of an alphanumeric display, a keyboard with 9 membrane keys,
a light emitting diode (LED) that lights when voltage is applied (HV on) and connectors for
two electrophoresis units.
4.1.1 Display
A 32 digit alphanumeric display guides you through the programming, shows current
parameter values during the electrophoresis and final parameter values afterwards. It
also asks questions and shows error messages. The display has an upper and lower row.
Fig. 1 (inside front cover) shows the display in the start position when power is switched
on for the first time. The mode (in this case SET) is shown in the upper row on the left.
The program number is in the center of the upper row. The number shown is that of the
previously entered program. As no program has yet been entered, the first available
program number, P1, is shown. The blinking figure, in this case “1”, indicates that it can
be changed by using the /keys. The upper right shows the programmed breakpoint. In
this case it is off.
The lower left, middle and right positions show voltage, current and power respectively.
4.1.2 Keyboard
ENTER
Enters a value, locks the value if correct, and moves programming to the next field.
Valid values are voltage 6–600 V, current 1–400 mA, power 1–100 W, time 0:01–500 h,
volthours 1–500 000 Vh.
SET
Puts the instrument into SET, its programming and starting mode. In the RUN mode,
pressing SET also shows the programmed parameters for the actual run. In addition,
SET allows you to make changes in the program during a run after first pressing PAUSE
CONTINUE.
CHANGE UP/CHANGE DOWN
Changes the parameter, value or other choice in the field which is blinking. Numerical
values are changed in an accelerating manner when a key is held down. Clicking a key
changes the value in preset increments. Parameters or units (e.g. Vh) and yes/no choices
are changed with one key push. The keys can also be used to switch between time and
volthours in RUN, PAUSE and END. The values scroll i.e. they automatically change from
maximum to minimum value or vice versa.
RUN
Pressing RUN starts the run and puts the program into RUN mode. The program number,
current values for voltage, current and power are shown on the display. The elapsed
time or volthours are also displayed. Switch between time and volthours with
/
.
enter
set
/
run
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Technical description 4
13
Electrophoresis Power Supply EPS 601 User Manual 18-1130-19 Edition AD
