A diagnostic recording device connected to the brake pipe to monitor and chart air pressure fluctuations. It creates a continuous graph showing how the brakes apply, hold, and release during operation. Mechanics and air brake instructors use it to troubleshoot sticky valves, verify brake pipe integrity, and evaluate a locomotive engineer's train handling skills.
Hook the trainagraph up to the rear end and let's see if that pressure drop is real or just a bad gauge.
Related terms
Brake pipe
The air line running the full length of a train that charges and controls every car's brakes.
Air line
A railroad route built as straight and level as possible between two points to minimize travel time.
Triple valve
The core control valve in a railway air brake system that charges, applies, and releases the brakes.