Is an analogue only transmitter as accurate as a smart
transmitter?

Answer Posted / rezvanian

"smart" means that you have a SIMULTANEOUS analogue signal
and digital communication. So HART is "smart" because it
has 4-20 mA and the Bell 202 modulated communication at the
same time. it can also perform diagnosis. I believe that
its not a communication protocol. Smart transmitters can
use any protocol for communication …

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