Called by various names including EDM (Engine Data Monitor), ECM (Engine Condition Monitoring) etc. these are essentially aircraft engine monitoring systems. These electronic monitoring cum display units are at heart, a very simple device and this article aims to explain in simple language, how these devices work.

There are two parts to any aircraft engine monitoring system:

1. The EDM / ECM itself and,
2. The probes

The probes:

If you have ever been inside the ICU of any hospital, you might have notice patients hocked up to a monitoring system. On the patient are attached various senso ... Read more »