AEMC 6471 User Manual page 5

5. AUTOMATIC MODE ........................................................................ 27
5.1 Switching the Test Voltage .................................................................27
5.2 Resistance Measurement mΩ (2-Wire) ..............................................27
5.2.1
5.2.2
5.3 Resistance Measurement mΩ (4-Wire) ..............................................30
5.4 Earth/Ground Measurement (3-Pole) .................................................31
5.4.1
5.4.2
5.4.3
5.5 Earth/Ground Measurement (4-Pole) .................................................35
5.5.1
5.5.2
Soil Resistivity Measurements ( ρ Position) ........................................38
5.6
5.6.1
5.6.2
5.6.3
5.6.4
5.6.5
5.7 Earth/Ground Measurements with Two Clamps .................................43
6. MANUAL MODE ............................................................................ 45
6.1 Switching the Test Voltage .................................................................45
6.2 Measurement Frequency Selection ...................................................45
6.3 Manual Settings for mΩ Measurements ............................................46
6.3.1
6.4 3-Pole Earth/Ground Measurements & Coupling ................................ 47
6.4.1
6.4.2
6.5 4-Pole Earth/Ground Measurements .................................................49
6.6 Soil Resistivity Measurements ...........................................................49
6.7 Measurements with Two Clamps .......................................................49
6.8 Smoothing ..........................................................................................49
7. MEMORY FUNCTION ..................................................................... 50
7.1 Saving Measurements into Memory...................................................50
7.2 Recalling Measurements from Memory .............................................51
7.3 Erasing Measurements from Memory ................................................51
Ground Resistance Tester Model 6471
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Lead Compensation Measurement ......................................28
Alarm Function ......................................................................29
62% Method ..........................................................................31
Full Method ...........................................................................33
Recommendations for a Reliable Measurement ...................34
Measurement without a Clamp .............................................35
Measurements with a Clamp ................................................36
Advantages/Disadvantages of Wenner & Schlumberger ......38
Changing the Measurement Method.....................................39
Programming the Distance for Electrode Placement ............39
Wenner Method ....................................................................40
Schlumberger Method...........................................................41
Continuity Test ......................................................................46
3-Pole Earth/Ground Measurements ....................................47
Earth/Ground Coupling Measurements ................................47
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