Golden Rule of frequency selection says to use the lowest
frequency that will produce a traceable signal over the distance
you need to cover. Your best strategy is to choose a frequency
based on the resistance of your circuit and what you want
- If you have a good circuit and you want to go very long
distances use a low frequency.
- If you have a good circuit and do not need to travel as
far then start with a medium frequency like 8kHz. Usually
a good frequency range to start with in most circumstances.
- Because of the higher risk of bleed over and their limited
range higher frequencies are best used on poor circuits
or when lower frequencies have previously failed.
Very high frequencies should be used as a last resort or if
you want to energize as much area as you can just to see if
anything is there.