MI 2140 MI 2140 Omega &BetaPAT Instrument description
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4.3.7. Polarity test
The purpose of this test is to check the continuity and polarity of the mains supply cable.
Following faults are detected: L-PE shorted, N-PE shorted, L-N shorted, L open, N
open, PE open, N-PE crossed, L-PE crossed, L-N crossed, multiple fault.
IEC CORD
UNDER
TEST
Fig. 4.44 Connection of IEC cord for polarity test
How to carry out Polarity test:
STEP 1. In the MAIN MENU window select SINGLE TEST and confirm with the
ENTER key.
STEP 2. In the SINGLE TEST window select POLARITY and confirm with the ENTER
key.
Fig. 4.45 Polarity test initial display
STEP 3. Press the START key to perform test.
STEP 4. PASS / FAIL result is shown on the display. In case of a FAIL result
explanation is displayed under the decision. Repeat the test with the START
key or return to SINGLE MODE main screen with the ESC key.
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