What Frequency should I use?

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If your locator offers multiple frequencies, then start somewhere mid-range. For example if your locating kits offers 512Hz – 8kHz – 33kHz – 65kHz, then start at 33 kHz and see if it works for your particular locate site. If it does not, move up or down the available frequencies based on the general rules that follow.
LOWER your frequency if:
There is too much bleed-over to adjacent utilities.
You need to increase your locating range.
INCREASE your frequency if:
Your are using induction mode (“dropping the box”).
You are dealing with a bad conductor such as Cast Iron pipe or a broken tracer wire.
You want to locate a mains as well as service laterals.

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