3-Pole Ground Resistance Test; 4-Pole Soil Resistivity - AEMC 6470 User Manual

5.7.3

3-Pole Ground Resistance Test

When 3-Pole Ground Resistance is selected from the tool bar, you can select:
• With or without Auxiliary Rod Resistance
• Test voltage of 16 or 32V
• Auto frequency - selects the optimum frequency (from 40 to 513Hz), usually
128Hz, or select manually from the drop-down frequency list
Selecting a sweep frequency test from the drop-down list will bring you to the
sweep table selection, available only with the meter connected to a PC.
5.7.4

4-Pole Soil Resistivity

When 4-Pole Test Resistivity is selected from the tool bar, you can select:
• With or without Auxiliary Rod Resistance
• Test voltage 16 or 32V
• Test frequency from the drop-down list (selecting this will bring you to the
sweep table selection, available only with the meter connected to a PC)
• Test Method - Wenner or Schlumberger
The distance "d" (for Wenner test method) or "d" and "a" (for Schlumberger test
method), between the test electrodes, needs to be entered for resistivity calcula-
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64
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Figure 5-8
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Ground Resistance Tester Model 6470