AEMC 4620 User Manual page 5

4.2 GROUND RESISTANCE VALUES .......................................... 28
4.3 GROUND RESISTANCE TESTING PRINCIPLE
(FALL-OF-POTENTIAL-3-POINT MEASUREMENT) ......................
4.3.1 Position of the Auxiliary Electrodes in Measurements .................
4.4 MEASURING RESISTANCE OF GROUND ELECTRODES
(62% METHOD) ........................................................................ 32
4.4.1 Auxiliary Electrode Spacing..........................................................
4.5 MULTIPLE ELECTRODE SYSTEM ........................................ 34
5. SPECIFICATIONS ............................................................................ 36
5.1 ELECTRICAL ............................................................................ 36
5.2 MECHANICAL .......................................................................... 37
5.3 ENVIRONMENTAL ................................................................... 38
3.4 SAFETY .................................................................................... 38
5.5 AUTO-RANGING ...................................................................... 38
6. MAINTENANCE ................................................................................ 39
6.1 WARNING ................................................................................. 39
6.2 DISASSEMBLY ......................................................................... 39
6.3 POWER SUPPLY ..................................................................... 40
6.3.1 Testing the Battery .......................................................................
6.3.2 Replacing the Battery (Model 4620).............................................
6.3.3 Recharging the Battery (Model 4630) ..........................................
6.3.4 Replacing the Safety Fuse ...........................................................
6.4 CLEANING ................................................................................ 42
6.5 STORAGE ................................................................................. 42
6.6 REPAIR AND CALIBRATION .................................................. 42
6.7 TECHNICAL AND SALES ASSISTANCE ............................... 43
6.8 LIMITED WARRANTY .............................................................. 43
6.9 WARRANTY REPAIRS ............................................................ 43
Digital Ground Resistance Tester Models 4620 & 4630
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