The PowerEase 500 Power Supply can be operated under a variety of conditions including constant voltage, constant current and constant power. The default setting is for constant voltage. We recommend running our precast gels at constant voltage for the following reasons:
- They are continuous gels
- For most electrophoresis methods, resistance increases throughout the run. When run at constant voltage, current and power decrease throughout the run, providing a natural safety margin
- The same voltage setting can be used regardless of the number, or thickness of gels being run
If you would like to use the PowerEase 500 Power Supply to run a gel at constant current, this can be accomplished by setting a voltage limit (at or slightly above the maximum voltage expected to be reached during the run) and then setting the current to the desired level. In this way, the device will try to reach the set voltage. However, when it reaches the threshold current, the current will plateau and the run will switch to constant current (the limiting factor). If no voltage limit is set and a local fault condition occurs, such as a poor connection, very high local resistance may cause the voltage to increase to the maximum of the power supply. This can lead to local overheating and damage to the electrophoresis unit and or gel(s) or create unsafe conditions. Note: The PowerEase 500 Power Supply has been discontinued as of December 31, 2013 and our newer alternatives are the PowerEase 300W Power Supply and PowerEase 90W Power Supply.
Find additional tips, troubleshooting help, and resources within our
Protein Electrophoresis and Western Blotting Support Center.