16
PowerEase
®
300W Power Supply User Guide
20B
Common errors
Observation
Possible cause
No load
The electrophoresis system is not connected to the power leads, check the power
leads
The electrophoresis system has a short, the platinum wire is broken or the banana
connectors are damaged
Buffer concentration too low
Buffer volume too low
Short in power cord
Current has dropped below acceptable rating (10 mA)
Short circuit
Load exceeds 3A
Blown fuse in the power supply
Incorrect input voltage (check input voltage switch near power inlet)
Change in load
Electrophoresis systems were added or removed during a run
Buffer leaking in a connected system
Excessive temperature increase
Excessive buffer evaporation
Loose connection in a connected system
Current set too low
Change in constant
mode
Voltage changes to current
Current set too low. Ceiling hit and constant mode changed from voltage to
current. Increase current to 3A.
Current changes to voltage
Voltage set to low. Ceiling hit and constant mode changed from current to
voltage. Increase voltage to 250V
The PowerEase
®
300W Power Supply has automatic cross over, set voltage or current, and preset power. During the
electrophoresis process only one parameter is limiting at a time. The limiting parameter, together with the conductivity
in the electrophoresis system, and the values for the other parameters determine the maximum output.
