Patent ID: 8754629
Filing Date: 2014-06-17
Classification: G01R

Abstract:
1. An audio tone probe for use by a technician to identify a conductor carrying an applied tracing tone signal comprising: a probe tip, to be positioned by the technician proximate a conductor; a mains warning circuit in electrical communication with said probe tip, said mains warning circuit including a mains warning generator; a tracing circuit in electrical communication with said probe tip; a speaker for providing audio tones to the technician in communication with said mains warning circuit and said tracing circuit; wherein said probe tip detects signals in an electric field proximate said probe tip and provides said detected signals to said mains warning circuit and said tracing circuit; wherein said mains warning circuit is configured to determine whether a mains signal is present in said detected signal and to activate a warning generator if said mains signal is present; and wherein said tracing circuit is configured to filter mains signals from said detected signals and an output of said tracing circuit is utilized to provide a tone generating signal to said speaker to reproduce the applied tracing tone.