Operation Manual

MI 3310 / MI 3310A SigmaGT Measurements
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 For more information refer to chapter Measurements according to IEC/ EN
60974-4, paragraph Insulation resistance (supply circuit to welding circuit) in
3-phase adapter user manual.
Result screens:
Examples of Insulation LN-W measurement results
Displayed results:
Main result ............. Insulation resistance LN-W
Note:
 Consider displayed warnings before starting measurement!
5.3.5 Insulation resistance (supply circuit of class II equipment to
accessible surfaces)
The insulation resistance test checks the resistance between primary supply circuit and
the isolated accessible conductive parts of the welding machine.
The instrument measures the insulation resistance between:
- mains test socket‘s live terminals on 3-phase adapter (A1422) and the EB/S
terminal on SigmaGT.
Insulation LN-P menu
Test parameters for insulation resistance LN-P measurement
OUTPUT Test voltage [500 V]
LIMIT
Minimum resistance [5.00 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]
Test circuit and measurement procedure for insulation resistance LN-P
measurement