Insulation tests
15
All fuses in or circuit
breakers closed
Mains switch open
Equipment disconnected
Switches closed
Lamps out
Reading not less
than 0.5 MΩ
Main
switch
open
Note: insulation testing must only be undertaken on
de-energised circuits
Fig 7
3 If the mains warning lamp lights and/or the buzzer sounds do not
press the test button but disconnect the instrument from the circuit.
Make the circuit dead before proceeding.
Fig 8
4Press the test button when the display will show the insulation
resistance of the circuit or the appliance to which the instrument is
connected.
5 Note that if the circuit resistance is greater than 20MΩ the instrument
will automatically range to the 200MΩ reading.
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