Tuttnauer 2540 EHS, Technician Manual

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9 MAINTENANCE AND REPLACEMENT PROCEDURES
9.1 Safety Tests after Repair
ATTENTION!
After every repair or dismantling of the enclosure, it is
recommended that the following tests be performed:
1. Enclosure Current Leakage Test.
The test should be performed using a Megger. Make sure the
autoclave is unplugged. The electrical potential of the testing
instrument should be 500V. The insulation resistance should be at
least 2 M Ω .
The test is successful if there was no leakage.
2. Protective Earth Impedance Test
The test should be performed using an Ohmmeter. Make sure the
autoclave is unplugged from the wall outlet. Next measure the
resistance between the grounding screw on the rear plate (or any
other unpainted metallic part) and the grounding pin of the power
cord plug. The resistance should not exceed 0.3 Ω , a high
resistance would indicate a faulty ground connection.