A good circuit - Has low resistance
to the flow of electrical current through the target utility.
The utility, the earth, the ground rod and all of their connection
points contribute to the resistance to overall current flow.
Actions taken to lower any resistance will help increase current
Grounding - Make sure that both
your transmitter and the far end of insulated lines are well
grounded. These connection points "close the loop" to complete
Type of Soil/Moisture Content of Soil
- Moist, clay soil is highly conductive; dry, sandy soil is
Conductivity of Target line -
Continuously metallic lines are good conductors, non-metallic
utilities do not conduct.
Continuity of Target Line - Insulators
or gaskets between sections can impede or block current flow,
especially at lower frequencies.
Common Bonding of multiple utilities
- This creates many paths for current to flow. It confuses
the locate and robs current flow from the target line.
Presence of other lines - Adjacent
conductors can draw current off target line even if they are
not directly bonded.
More current makes locating easier and more
accurate - The downside to using the maximum
power setting is shorter battery life. To maximize both accuracy
and battery life, a good rule of thumb is to set the transmitter's
output to the point where you have a strong, steady and clear
signal over the distance you need to locate.