Sensors and transmitters play an insignificant role in instrumentation and industrial automation. Unlike sensors, smart pressure transmitters often have a certain expansion effect in addition to converting non-electricity into measurable power. This article briefly analyzes the characteristics of the intelligent pressure transmitter for users to choose.
The intelligent pressure transmitter is made up of sensors and micro-processors (microcomputers). It makes full use of the microprocessor's computing and storage capabilities, and can process the sensor data, including the scheduling of measurement signals (such as filtering, Expansion, A/D conversion, etc.) data display, active correction and active compensation.
The microprocessor is the center of the smart pressure transmitter. Not only can the measurement data be calculated, stored and processed, but the sensor can also be conditioned through the reaction loop to optimize the collected data. Because the microprocessor has a variety of software and hardware functions, it can complete the mission of aggressive transmitters. Therefore, the intelligent pressure transmitter reduces the difficulty of manufacturing the sensor and improves the function of the sensor in a large range. Other smart pressure transmitters also have the following features:
1. With active compensation ability, the software can actively compensate for the nonlinearity, temperature drift and time drift of the sensor.
Self-diagnosis, the sensor can be self-tested after power-on to check whether the sensor parts are normal and make a judgment.
Data processing is convenient and accurate, and data can be actively processed according to internal order, such as calculation and disposal, removal of inverse constant values, and the like.
2. Has two-way communication function. The microprocessor not only accepts and disposes of sensor data, but also reacts information to the sensor to condition and manipulate the measurement process.
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Information storage and recall can be performed, and sensor characteristic data, configuration information, and compensation characteristics can be stored.
3. With digital interface output function, the output digital signal can be conveniently connected with the computer or field bus.
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