The microprocessor-based field intelligent instrument is produced by conforming to the field bus. Similarly, the application of the field intelligent instrument provides a good foundation for the development and application of the fieldbus and puts forward new problems for expert research. At this stage of the field of intelligent instruments, as described in the literature, due to communication protocol is not compatible, and take into account the conventional instrument 4-20mA analog signal transmission point. Is a last resort of a transitional product. Can not really adapt to the fieldbus real intelligent field instrument. It can not reduce the initial installation cost of the control system. It can not give full play to its own superior function, but can not achieve the scene of intelligent information exchange between the exchange of information and operation.
however. Intelligent transmitter, after all, represents the rise of the new - generation transmitter, which uses today's many high-tech. Such as sensor technology, microelectronics digital processing technology, compared with the often transmitter, with high precision, good stability, high reliability, wide measurement range, range than large and so on. The advantage is that it implements digital communication. Through the same communication protocol with the DCS system or field communication controller can be a variety of intelligent transmitter parameters to change, set, to achieve remote debugging, man-machine dialogue. Monitor all kinds of data online. As with all smart meters, intelligent transmitters also have a complete self-diagnostic function. It can be said that the current smart transmitter is a substitute for the past, on behalf of the future development of field instrumentation of the new transmitter.