Tuttnauer 1730EK, Technical Manual

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9. REPLACEMENT OF COMPONENTS
9.1 Safety Tests after Repair
ATTENTION!
After every repair or dismantling the enclosure, the autoclave should
pass two safety electrical test by the Service Engineer. The following
shall be performed:
1. Enclosure Leakage Current Test.
Every autoclave should pass this test as follows:
1. Remove the outer cover (see para. 9.2 “ Dismantling the Outer
Covers of the Autoclave ” ).
2. Disconnect receptacle from JP3.
3. Remove all fuses
4. Connect the electrical cord to the autoclave.
5. Turn on the circuit breaker.
6. Short-circuit the L and N pins on the cord's plug.
7. Connect the Short-circuit pins to the L pole on the Megger.
8. Connect the earth pins to the earth pole on the Megger.
9. Impose an electrical potential of 500-1000V on the tested
autoclave. The insulation resistance should be at least 2 M
Ω .
The test is successful if there was no leakage.
2. Protective Earth Impedance Test
1. Connect the grounding pin of the power cord plug to one pole of
an Ohmmeter.
2. Connect any other metallic part (preferable – the metallic part of
the locking screw) to the second pole of the Ohmmeter.
3. The resistance should not exceed 0.3 Ω .
After performing these tests, the Service Engineer should complete and
sign the Work Order.