How do I know if my ground is good?

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The transmitter will indicate the quality of your connection to both the target line and also to ground. Some transmitters produce an audible tone that changes to a lower pitch once a good connection is made. Others show its output in units of electrical current – mA (mili Amps). If you make all connections and the transmitter’s tone does not change, or your current output shows 0 mA, then your connection is not good.

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