What does it mean when the Tic Tracer beep increases or a siren is heard when placed near a circuit?

• A. Current is present between 30 to 1500 Volts AC
• B. No voltage is present
• C. Only DC voltage is present
• D. The Tic Tracer is in standby mode

Answer: (A)

The beep signals that AC voltage is present in that circuit within the tester’s detectable range. The Tic Tracer is a non-contact voltage tester, so it senses the changing electric field produced by alternating current without needing to touch the conductor. When it detects voltage in its sensitivity window, it emits an audible cue, and the tone tends to get stronger as the voltage increases. In this device, that detectable range is about 30 to 1500 volts AC, so hearing the beep means there’s live AC power somewhere in that range. It won’t reliably indicate DC voltage, and if there’s no live circuit nearby, you’d hear no beep. Keep in mind it’s a quick safety check and can be influenced by nearby conductors or capacitive coupling, so verify with other tests when needed.