MI 3321 MultiservicerXA
Single tests in PAT testing mode
51
Connect
device under test to the instrument (see figures above).
For
fixed
equipment:
Disconnect mains
supply of the fixed equipment;
Connect
LN test socket of the instrument to L/N terminals of the fixed equipment;
Connect
PE test socket of the instrument to metallic enclosure of the fixed
equipment.
Press the
START
key for measurement.
Examples of
insulation
resistance measurement results
Displayed results:
Main result ............. Insulation resistance
Notes:
Leakage currents into the S/C1 input will influence insulation resistance
measurement.
When S/C1 probe is connected during the test then the current through it is also
considered.
The DUT should be de-energized before the measurement!
Consider any warning on the display before starting the measurement!
Do not touch or disconnect the DUT during the measurement or before it is fully
discharged! The message »
Discharging…
« will be displayed while the voltage on
the DUT is higher than 20 V!
6.2.3
Insulation resistance - S
The insulation resistance test checks the resistance between live conductors and
isolated accessible metal parts of DUT. This test can disclose faults caused by pollution,
moisture, deterioration of insulation metal etc.
The instrument measures the insulation resistance between:
- Main test socket (L+N) and S/C1 test terminals, and
- LN and S/C1 test sockets.
This function is primarily intended for testing Class II DUTs and Class II parts of Class I
DUTs.
Insulation S. menu
