EPS 301 - User Manual

4.5 Output sockets

There are two sets of output sockets connected in parallel to allow two electrophoresis units to be connected and run at the same time, see Fig. 1 inside front cover.

4.6 Rear panel

The rear panel is shown in Fig. 2, see inside front cover. On the rear panel there is:

1.A mains switch. Press in I to switch on the power to the power supply. Press 0 to switch off the power.

2.A socket for the mains cable.

3.A switch for voltage range. The left position corresponds to 100–120 V and the right to 220–240 V.

4.Vents.

5.Operation

5.1 Connecting the electrophoresis unit(s)

Connect the leads from the electrophoresis unit (red to red, and black or blue to blue). Red is positive and black or blue negative. Two electrophoresis units can be run at the same voltage simultaneously. When two electrophoresis units are run at the same time, double the current. Voltage will be the same whether one or two units are run.

5.2 Programming

Programming

Enter the program mode by pressing SET/ENTER. When the display is flashing and one of the parameters V, mA or h.m. is lit, the program is ready for setting the values by using the / buttons.

Confirm and go to the next parameter by pressing SET/ENTER.

Pressing STOP in program mode saves the displayed value and puts the program in End mode. When the EPS 301 power supply is switched on, the programmed values from the last run can be used directly by pressing run.

Set limits for voltage, current and time

The flashing display and the lighted symbol V indicates that the voltage limit can be set. Using the / buttons, select the maximum voltage desired for the run. Confirm with SET/ENTER. Repeat the same procedure to set current and time limits. If no time limit is used, switch the timer off by setting the time to zero. This is indicated by - - - -. Confirm with SET/ENTER. Programmable values are: voltage, 5-300 V, current, 10-400 mA, time, 0.01-23.59 h or timer off (- - - -).

Alarm

When the programmed time has elapsed, the program will enter the End mode and the alarm will sound. You can stop the alarm by pressing any key. The timer and alarm are switched off by adjusting the time to zero.

5.3 Running

Run

Press RUN to start the electrophoresis. A light emitting diode shows when voltage is applied (HV on). The display will show one of the actual values. If no current is displayed, please check the electrical connections to the electrophoresis equipment.

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