Tinker & Rasor AC-15 - AC Warning System

The Tinker & Rasor Model AC-15 Warning System detects potential differences of AC between structure and ground for job site safety of personnel. The AC-15 AC Warning System is an instrument that detects potential differences of 15V AC or more on a structure (NACE International SP0177-2007).

Designed for pipelines that run through high voltage electrical transmission corridors (right of ways). The AC-15 AC Warning System is designed to detect induced AC on pipelines. The AC-15 is designed to be used in the field at locations where personnel will or might encounter pipelines where induced AC is suspected or may be indicated. An AC voltage alarm begins to sound when 7 volts AC or greater is detected. The instrument’s alarm provides both audible and visual alerts that will become more prominent as the AC levels increase.

Connections and operation

The Model AC-15 AC Warning System is comprised of the instrument and battery, cable with clamp, and an earthing rod for ground connection.

Connect the supplied cable to the banana jack on the instrument case labeled Structure. Make a good, low resistance connection of the cable lead to the pipe or structure. Ensure the earthing rod is screwed into the back of the instrument. Do not overtighten. Move the toggle switch to On and note the Green LED lights.

Push the earthing rod into the soil making a good surface area connection between the rod and earth.

If the Audible and Visual alerts are activated, the instrument has detected AC in the circuit, and appropriate cautions should be taken.