Fluke 87 V Manual do Utilizador descarregar pdf (Página 28)

80 Series V

Users Manual

Using 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

MΩ, 1/1 nS = 1,000 MΩ.

To measure conductance, set up the Meter as shown for

measuring resistance (Figure 5); then press C 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.

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Fluke 87 V Manual do Utilizador Página 28