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Ground Resistance Tester Model 6471
Figure 8-8
8.4.4 3-Pole Plus Clamp Resistance
Useful for testing multiple points without having to move the current and potential
electrodes.
This option is only available when there is a current probe connected to the Xv
terminal. The following conguration options are available:
• With or without Auxiliary Rod Resistance.
• Test voltage 16 or 32VAC.
• Auto frequency - select the optimum frequency (from 41 to 5078Hz), usually
128Hz, or select manually from the drop-down frequency list.
Current (Z) and potential electrodes (Y) are installed as in a fall-of-potential test.
Current probe and lead are both connected at the test point. Multiple test points
can be measured by moving the probe with its lead to a new location, but not mov-
ing the current and potential electrodes.
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