AEMC 4620 User Manual
Also see for 4620: User manual
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Contents
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32 Digital Ground Resistance Tester Model 4620 and 46305.3 Continuity MeasurementConnect the shorting link, supplied with the instrument, between X and Xv(E and Es).Connect a short wire or jumper cable between Y and Z (H and S) as shownin Figure 17.Continuity measurement is made with two leads, one from X-Xv and theother from Y-Z.Push the “Test” button to measure continuity. This is a good test to verifybonding between grounding electrode and the ground wire.ΩFigure 175.4 Soil Resistivity Measurements5.4.1 Purposes of Soil ResistivitySoil resistivity measurements have three purposes:1. Such data is used to make sub-surface geophysical surveys as anaid in identifying ore locations, depth to bedrock and other geologicalphenomena.2. Resistivity has a direct impact on the degree of corrosion in under-ground pipelines. A decrease in resistivity relates to an increase incorrosive activity and therefore dictates the protective treatment to beused. |
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