Operation Manual

OmegaGTPlus / BetaGTPlus Measurements
52
Earth bond resistance measurement procedure
Ì Select the EARTH BOND function.
Ì Set output test current.
Ì Set limit value.
Ì Set measuring time.
Ì Connect device under test to the instrument.
Ì Connect earth bond clip into its socket on the instrument.
Ì Connect alligator of earth bond clip to accessible metal parts of the device
under test (see figure above).
Ì Press the START key for measurement.
Examples of earth bond resistance measurement results
Note:
Ì Consider displayed warnings before starting measurement!
5.2 Insulation resistance
Insulation resistance between live conductors and earthed (or isolated) accessible metal
parts is checked. This test disclosed fault caused by pollution, moisture, deterioration of
insulation metal etc. The capacitive part of leakage currents is not measured because of
the DC test voltage.
Test parameters for insulation resistance measurement
OUTPUT Test voltage [250 V, 500 V]
LIMIT
(Insulation)
Minimum resistance [0.10 MΩ, 0.30 MΩ, 0.50 MΩ, 1.00 MΩ, 2.00
MΩ, 4.0 MΩ, 7.0 MΩ, 10.0 MΩ, none]
LIMIT
(Insulation S.)
Minimum resistance [0.10 MΩ, 0.25 MΩ, 0.50 MΩ, 1.00 MΩ, 2.00
MΩ, 4.0 MΩ, 7.0 MΩ, 10.0 MΩ, none]
TIME Measuring time [5 s, 10 s, 30 s, 60 s, 120 s, 180 s]
Notes:
Ì The appliance under test should be de-energized before the measurement!
Ì Consider any warning on the display before starting the measurement!
Ì Do not touch the appliance under test during the measurement or before it is fully
discharged! The message »Discharging…« is displayed while the voltage on
appliance under test is higher than 20 V!
Ì Do not disconnect the appliance under test from the instrument during the
measurement or before it is automatically discharged!