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2 Safety information
10
2.2
Built-in safety features
The EPS 3501 has been tested and complies with the IEC 61010 (EN 61010-1) electrical
safety standard.
The power supply also has several built-in safety functions. Error messages are also
shown on the display (see 7. Trouble shooting):
1.
Functional earth leakage.
Should the power supply be connected to an electrophoresis unit that has a leakage
path to earth, the EPS 3501 will detect this fault and the high voltage is turned off.
2.
Start current check.
To ensure that an electrophoresis unit is connected correctly, 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 voltage is turned off. Too high a resistance can also be
caused by using buffers with extremely low conductivity. The high voltage is also turned
off in this case and an error message is shown. This function can be disabled to perform
certain applications (see 5.4 Optional programming).
3.
Sudden load change detection.
This function prevents accidents under running conditions due to a break in the electrical
circuit such as a bad connection to the electrophoresis unit. The high voltage is turned
off in such an event.
Error messages are also shown on the display for sudden fails.
Electrophoresis Power Supply EPS 3501 User Manual 18-1130-21 Edition AD
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