2 Safety instructions
2.3 Emergency procedures
20 Electrophoresis Power Supply EPS 3501 XL Operating Instructions 28-9639-69 AA
2.3 Emergency procedures
This section describes how to do an emergency shutdown of EPS 3501 XL. The section
also describes the result in the event of power failure.
Emergency procedures
In an emergency situation, do as follows to stop the run:
Power failure
The result of a power failure depends on which unit that is affected.
2.4 Built-in safety features
The power supply has the following built-in safety functions:
Step Action
1
Switch off power to the instrument by pressing the Power switch to the 0
position. If required, disconnect the mains power cord. The run is
interrupted immediately.
Power failure to... will result in...
EPS 3501 XL The run is interrupted immediately, in an undefined state
Function Description
Functional earth
leakage
Should the power supply be connected to an electrophoresis
unit that has a leakage path to earth, the EPS 3501 XL will
detect this fault and turn off the high voltage.
Start current check The power supply checks that the resistance is not higher
than a specified limit at a low safety voltage (<40V). If this
resistance is too high, the high voltage is turned off.
Too high resistance can be caused by for example:
- an electrophoresis unit incorrectly connected
- use of buffer with exremely low conductivity
This function can be disabled to perform certain applications,
see Electrophoresis Power Supply EPS 3501 XL User Manual.
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