Hioki Super megohm SM7110 - Setting Resistivity Calculation (Resistivity Measurement Function)

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Setting Resistivity Calculation (Resistivity Measurement Function)
4.13 Setting Resistivity Calculation (Resistivity
Measurement Function)
Use of a electrode conforming to JIS or other standards enables the instrument to directly calculate
the surface resistivity and volume resistivity from the measured resistance.
Set the measured value display mode to [RS] (surface resistivity), [RV] (volume resistivity), or [RL]
(liquid volume resistivity).
See “3.1 Setting Measured Value Display Mode” (p. 39).
Examples of electrodes and connection points for measurement to distinguish between volume
resistivity and surface resistivity are given below.
t
D 2
D 1
A
B
Object to be
measured
C
(1) Example of electrodes
Volume resistivity
Surface
resistivity
A Main electrode Main electrode
B Guard electrode Counter electrode
C Counter electrode Guard electrode
(2) Access point
Main electrode: INPUT terminal
Guard electrode: GUARD terminal
Counter electrode: OUTPUT terminal
The product of the measured volume resistance and the electrode constant is called volume
resistivity (
ρv
), while the product of the surface resistance and the electrode constant is called
surface resistivity (
ρs
).
See “Calculation formula” (p. 148) in the specications about the calculation formulas.
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Applied Measurement