HART Protocol Implemention and Example
HART PROTOCOL Smart transmitters are ones that are capable of self-monitoring, using digital electronics internally. It doesn't stand for anything, just a term "smart". Some smart transmitters can communicate digitally, and there have been many different protocols used over the years since Honeywell first came to market in the early 80's with their pressure transmitter line. The idea is that there is a much easier and better way to calibrate, configure and monitor the signal using a smart device and keypad or handheld versus an analog type. I remember the days of Zero and Span pots and the interaction between the two, not to mention the drift that occurred over time and with temperature swings! Horrible to have to work with! Kept many instrument techs employed, with lots of overtime, however! The term and technology of HART was originally invented by Rosemount in the mid-80's as a response to Honeywell's first offering, and was also a proprietary standard. The...