5 Operation
Electrophoresis Power Supply EPS 3501 User Manual 18-1130-21 Edition AD
5.1
Overview
The operation of the EPS 3501 is described in the following sequence.
1.
Programming or editing a method.
2.
Running a method.
When the method is running, it can be interrupted (put in PAUSE mode) to apply samples
and/or change the program. During a run it is also possible to view the program settings.
Programming and running are discussed in more detail in the following two sections.
Blinking characters are shown as bold characters.
5.2
Programming
Start position
When the power supply is switched on, the display shows the start position in SET mode.
The previous program set is shown and that program number is blinking, for example:
SET:
P1
3000 V
50mA
(If the power supply is switched on for the first time, the breakpoint para-meter and the
alarm are off and the values for voltage, current, and power are 35 V, 150 mA and 100 W
respectively).
Choosing a program
Up to 3 programs can be entered. Press ENTER to confirm the program shown on the
display or use
/
keys to choose another. Confirm with ENTER. The programming
procedure can be followed step by step in Fig 3.
Setting voltage, current and power limits
The display will now flash for the set voltage limit. Using the
maximum voltage desired for the run. Confirm with ENTER. Repeat the same procedure
for limiting current and limiting power. Programmable values for voltage are 35–3500,
current, 1–150 mA, power, 1–100 W, time, 0:01–500 h, volthours, 1–500 000 Vh.
Setting break-point
Choose between manual break or automatic break. For automatic break, choose
breakpoint units in either Volthours (Vh) or time (h). Select the correct unit or, for manual
break, choose "OFF" with
If volthours or h (time) were chosen, the display will flash for the break value. Set the
value with
and confirm with ENTER.
/
Choosing alarm
When a breakpoint has been entered, the following question is shown: Alarm at End ?
Y Select YES or NO with
/
appears on the right of the program number, i.e. 2
OFF
20 W
. Confirm with ENTER.
/
and confirm with ENTER. If YES is selected, a small "A"
A
.
Operation 5
keys, select the
/
15
