Operation Manual

MI 3310 / MI 3310A SigmaGT Measurements
50
Notes:
 Leakage currents into the EB/S and PE test inputs will influence insulation
resistance measurement.
 When EB/S or PE probes are connected during the test then the current through
them 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!
5.2.3 Insulation resistance – S probe
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 material etc.
The instrument measures the insulation resistance between:
- Main test socket (L+N, +) and EB/S (-) test terminals, and
- LN (+) and EB/S (-) test sockets.
This function is primarily intended for testing Class II DUTs and Class II parts of Class I
DUTs.
Insulation – S probe menu
Test parameters for insulation resistance measurement
OUTPUT Test voltage [250 V, 500 V]
LIMIT
Minimum resistance [0.01 M, 0.10 M, 0.25 M, 0.30 M, 0.50 M,
1.00 M, 2.00 M, 4.00 M, 7.00 M, 10.0 M, none]
TIME Measuring time [2 s, 3 s, 5 s, 10 s, 30 s, 60 s, 120 s, 180 s, none]