Table of Contents
1. INTRODUCTION ....................................................................3
1.1 International Electrical Symbols .....................................................4
1.2 Receiving Your Shipment ...............................................................4
1.3 Ordering Information ......................................................................4
1.3.1 Accessories and Replacement Parts ................................4
2. PRODUCT FEATURES ............................................................6
2.1 Description .....................................................................................6
2.2 Detaching the Cover ......................................................................7
2.3 Control Features ............................................................................8
3. SPECIFICATIONS ..................................................................9
3.1 Electrical Specifications
.................................................................9
3.2 Accuracy ......................................................................................10
3.3 Table of Influencing Parameters
..................................................11
3.4 Influence of Stray Voltage
............................................................12
3.5 Influence of Auxiliary Resistances
...............................................12
3.6 Mechanical Specifications
............................................................13
3.7 Safety Specifications
....................................................................14
4. OPERATION .........................................................................15
4.1 Grounding Electrode Resistance .................................................15
4.1.1 Effect of Electrode Size/Depth on Resistance .................17
4.1.2 Effects of Soil Resistivity on Electrode Resistance .........18
4.1.3 Factors Affecting Soil Resistivity ......................................18
4.1.4 Effect of Ground Electrode Depth on Resistance ............21
4.2 Ground Resistance Values
..........................................................22
4.3 Ground Resistance Testing Principle ...........................................24
4.3.1
Position of Auxiliary Electrodes in Measurements
.................25
4.4 Measuring Resistance of Ground Electrodes ..............................26
4.4.1 Auxiliary Electrode Spacing
.............................................28
4.5 Ground Resistance Measurement Procedures ............................29
4.5.1 Over-range Indication ......................................................30
4.5.2 Incorrect Measurements ..................................................30
4.6 2-Point Measurement
(Simplified Measurement)
.....................30
