UNI-T UT528, Operating Manual

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10
2.
Insulation Resistance Test
Before the unit carries out the insulation test it will attempt to check that the
connected appliance’s power switch is in the on position.
If it detects that the appliance switch is in the on position it will automatically
carry out the insulation test.
Please note: most electronic appliances will have electronic ‘on/off’ switches
and even though they are switched on the “Check Connections” message will
still appear.
If the measured resistance is greater than 1M Ω , the meter will display “ √
Riso” as a PASS rating.
If the insulation of the appliance is less than 1M
Ω , it will display “× Riso” as a
FAIL rating.
Leakage Test
3. After the unit has completed the insulation test it will automatically proceed to
the leakage test.