Operation - VWR International 250V Instruction Manual

Operational Modes
Introduction
The 250V Power Supply is designed to operate under two modes, Constant Voltage
Operation / Constant Current Operation or Programming Mode, depending upon your
electrophoresis needs.
Use the Constant Voltage / Current Operation for applications that require only one specific
voltage limit, current limit, and power limit continuously during the entire duration of
electrophoresis.
Display Screen
The Display Screen is the screen to appear after turning on the power to your instrument.
You can choose the operational Mode (Constant Operation or Constant Current Mode) on
the downward side of the display screen.
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On the Display Screen:
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The voltage value is displayed on the left-top side of the display screen.
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The Timer is the first line on the right-top, and current value is displayed in the second
line on the right-top side of the display screen.
Constant Operation Protocol
Introduction
Instructions for operating the 250V Power Supply in the Constant Operation are provided in
this section. The Constant Voltage / Current Mode allow you to specify a voltage limit, and
current limit to be used continuously during the entire duration of electrophoresis. Review the
guidelines provided in this manual before starting electrophoresis using the 250V Power
Supply.
A basic Constant Voltage / Current Mode operating procedure of the 250V Power Supply is
provided below. We recommend reading the guidelines provided in this manual for best results
before starting an operation.
1. Use the power switch on the rear side of the instrument to turn on the 250V Power Supply.
The Display Screen will appear on the screen.
2. Press the CONSTANT key to select either Constant Voltage Operation or Constant
Current Operation from the Display Screen.
3. Use the ▼▲ arrow keys to set either voltage (V) or current (mA) parameters to the
appropriate values.
4. Choose and use ▼▲ arrow key to set the time (hours/minutes) to specify the duration of the
electrophoresis.
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