ELECTRICAL HAZARD WARNING IN AUDIO SIGNAL PROBE

摘要

An audio tone probe is provided for use by a technician to identify a conductor carrying an applied tracing tone signal. The audio tone probe includes a probe tip which is positioned by the technician proximate a conductor. A mains warning circuit and a tracing circuit are provided in communication with the probe tip and a speaker is provided in communication with the mains waming circuit and the tracing circuit. Signals detected by the probe tip are provided to the mains warning circuit and the tracing circuit. The 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. The 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.