How To Use Conductance For High Resistance Or Leakage Tests - Fluke 27-II User Manual

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Users Manual
How to Use Conductance for High Resistance or
Leakage Tests
Conductance, the inverse of resistance, is the ability of a
circuit to pass current. High values of conductance
correspond to low values of resistance.
The Meter's 60-nS range measures conductance in
nanosiemens (1 nS = 0.000000001 siemens). Because
such small amounts of conductance correspond to
extremely high resistance, the nS range lets you
determine the resistance of components up to
100,000 M , 1/1 nS = 1,000 M .
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To measure conductance, set up the Meter for measuring
resistance as shown in Figure 5, then press  until
the nS indicator appears on the display.
The following are some tips for measuring conductance:
High-resistance readings are susceptible to
electrical noise. To smooth out most noisy readings,
enter the MIN MAX recording mode; then step to the
average (AVG) reading.
There is normally a residual conductance reading
with the test leads open. To ensure accurate
readings, use the relative (REL) mode to subtract
the residual value.