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 (4 mA)
Short circuit
•
Load exceeds 500 mA
•
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 500 mA.
•
Current changes to voltage
Voltage set to low. Ceiling hit and constant mode changed from current to
voltage. Increase voltage to 300 V
The PowerEase
®
90W 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.
14
PowerEase
®
90W Power Supply User Guide
Summary of Contents for PowerEase 90W
Page 19: ......
