Megger Acoustic Imagers
Acoustic imagers are extremely useful for detecting leaks in compressed air systems, as well as finding partial discharge and Corona problems in high voltage equipment.
Acoustic imagers contain a large number of highly sensitive microphones covering both the audible and ultrasonic range. These devices use an algorithm to convert the detected sound to a visual image, which is then superimposed over a standard digital picture. This image shows a color-coded spectrum of decibel levels per frequency. The end result is that technicians are able to see sound – they are able to pinpoint the exact source of a problem, even in noisy environments.
Listed below are three models from Fluke and FLIR, including their frequency range and maximum detection range.
- FLIR Si124
- 2 – 31 kHz
- Up to 328 feet
- Fluke ii900
- 2 – 52 kHz
- Up to 164 feet
- Fluke ii910
- 2 – 100 kHz
- Up to 393 feet
Leaks in compressed air systems
Acoustic imagers offer a large advantage over traditional methods. With greater accuracy and higher sensitivity, they can easily find leaks that are smaller or further away. It is even possible view the leak rate in l/min or CFM, as well as estimate the yearly energy loss.
Partial discharge and Corona
Partial discharge is not only dangerous, it can cause blackouts, fires, explosions, or death from arc flashes. Acoustic imagers provide a safe, quick, and easy way to detect and locate partial discharge in order to maintain high voltage equipment and prevent catastrophic events.