KYORITSU KEW3125A - Measurement - Voltage Characteristics and Guard Terminal; Voltage Characteristics Graph; Using the Guard Terminal for Accuracy

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6-5 Voltage characteristics at measuring terminal
6-6 Use of Guard terminal
Whenmeasuringtheinsulationresistanceofacable,leakage
currentflowingonthesurfaceofcablejacketandthecurrent
flowing inside the insulator are mixed and may cause error
in insulation resistance value. In order to preventsuch error,
wind a conductive wire around the point where leakage
current flows. Then connect it to the Guard terminal. This
is to move out the surface leakage resistance of the cable
insulationtomeasureonlythevolumeresistanceofinsulator.
MakesuretousetheGuardcordsuppliedwiththisinstrument
toconnecttheinstrumenttoGuardterminal.
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1000
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6000
0.1
MΩ
1
MΩ
10
MΩ
100
MΩ
1000
MΩ
10
GΩ
100
GΩ
1000
GΩ
KEW3125A/3025A Output characteristics
5000V range
2500V range
1000V range
500V range
250V range
Insulation resistance
Output voltage (V)
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