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2
Operation
2.1
Overview
The basic method used to determine resistivity of an insulator sample is a two
step process; first, a test voltage is applied to the sample and the subsequent
current is measured. Then the test voltage value and measured current value are
applied to the appropriate equation, and resistivity is calculated.
The Model 8009 Resistivity Test Fixture is shown in Figure 2-1. The top view
shows the inside of the test fixture where the sample is mounted. The front view
shows the pushbutton switch that is used to select the desired resistivity test. The
side view shows the test fixture connectors.
The schematic diagram of the Model 8009 Resistivity Test Fixture is shown in
Figure 2-2. Notice that external connection to the electrodes of the test fixture is
accomplished through a 3-lug female triax connector. This connector will mate
directly to the Keithley Instruments Model 6517 using the Model 6517-ILC-3
cable or to a Model 6517B using the Model 6517B-ILC-3 cable.
5
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