3-7
12704A Resistivity Chamber Operation Manual
3.3 Measurement
3.3 Measurement
Perform measurement in accordance with the Operation Manual of each measuring instrument.
1. High voltage is used in insulation resistance measurement. Perform measure-
ment with great care.
2. Do not apply voltage without a sample or electrode protection sheet, otherwise
excessive current will flow, causing damage to the electrodes.
3. Do not give vibrations to the 12704A or connected cables during measurement,
otherwise measured values will vary.
3.3.1 Calculating Volume and Surface Resistivities
(1) When using the 8340A, 8252 or 5450/5451
The 8340A, 8252 or 5450/5451 has a function that calculates automatically the volume
and surface resistivities. For more information, refer to the respective Operation Manual.
(2) When using a measuring instrument other than the 8340A, 8252 and 5450/5451
Substitute measured values for the formulas to calculate the volume and surface resistivi-
ties.
Volume resistivity:
Rv
63.19v
[cm]
Surface resistivity:
Rs84.18s
[]
Rv: Measured volume resistance []
t: Sample thickness [cm]
Rs: Measured surface resistance []
Measure the thickness of the sample previously with a vernier caliper or micrometer.
CAUTION
CAUTIO
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