To Make An Extended Term Analysis
1. Check and record equipment temperature.
2. Check dew point temperature of the ambient
air - equipment under test must be above dew point
temperature for accurate results.
3. Ensure no power is applied to the equipment under test
and all connections are removed in order to totally isolate
the motor, cables or equipment form other circuits.
Use the connection tables to determine where to
make connections.
4. Turn your instrument power on (DMEG3).
5. Place rotary function select switch to the “
INSULATION
“
position, with the correct voltage selected - Use the same
voltage every time.
6. Make connections according to the sequence tables
provided or as your circumstances require.
7. Using a stopwatch or watch with a second hand, begin
your test at the same time you press and hold (or lock)
the “
Press to Test
” button.
8. At the end of one minute, read and record the insulation
resistance value.
9. Continue testing and record the value at the end of
10 minutes.
10. Evaluate results based on the Polarization Index table.
Following page: Copy and use the following PM data sheets
to record and monitor insulation resistance values of the
equipment you test.
23
