2-3
12704A Resistivity Chamber Operation Manual
2.2 Electrode Section
2.2 Electrode Section
See Figure 2-2 "Electrode Section" and Figure 2-3 "Opposed Electrode."
5. Main electrode plate
Place the conductive rubber main electrode within the concave portion.
Connects with the INPUT connector on the rear panel. Current flowing from the voltage
application electrode to this electrode is measured.
6. Ring electrode plate
Place the conductive rubber ring electrode within the concave portion.
Connects with the inner shield of the INPUT connector in volume resistivity measurement,
reducing the measurement error by canceling current flowing on the surface of a sample.
Connects with the HI of the V SOURCE terminal in surface resistivity measurement to be-
come a high-voltage application electrode. Voltage is applied between the main electrode
and this electrode.
7. Opposed electrode feed terminal
Inserting the opposed electrode to this terminal will apply voltage to the opposed electrode.
Insert the opposed electrode as pressing it down onto the ring electrode.
8. RESISTIVITY switch
A button switch to switch volume resistivity measurement (VOLUME) and surface resis-
tivity measurement (SURFACE).
Open the cover and make sure that the applied voltage switch is OFF or voltage is
not being applied when operating this switch.
9. PROTECTOR switch
Turning this switch ON will serially connect 1 M resistance to the V SOURCE. If a sam-
ple is short-circuited during measurement, the electrodes will be damaged. If there is such a
possibility, turn it ON.
When measurement is performed with the PROTECTOR switch ON, it takes longer time
until measured values are stabilized.
CAUTIO
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