Amprobe GP-1 Earth-Tester-Ground-Probe - Manual (Page 4)

Instrument Description
View of Instrument Controls
Test
lead/cable
input ports
RS-232
output port
Power
ON/OFF
Fuse/Fuse
Holder
Function
selector switch
START button Liquid Crystal
Display Battery Cover
Screw
Control
Panel
(see next
page for
details
on control
panel)
Battery Cover
Page 4
ITEMS AFFECTING GROUND ELECTRODE RESISTANCE
The soil’s ability to conduct current is dependent on the following:
1.The amount of moisture in the soil
2.The quantity of electrolytes
3.The type of electrolytes
4. Adjacent conductors
5. Temperature
6. Electrode depth
7. Electrode diameter
8. Electrode(s) spacing distance
All these factors must be considered when designing an adequate or required ground system.