The two pressures of the measured medium of the smart transmitter are passed into the high and low pressure chambers, acting on the isolation diaphragms of the delta element (ie, the sensitive element), and transmitted through the isolation diaphragm and the filling liquid in the delta element. Pretensioned measurement diaphragms on both sides. Measure the membrane and the electrodes on both sides of the insulator to form a capacitor. When there is no pressure or equal pressure on both sides, the diaphragm is measured at the middle position. The capacitances of the two capacitors on both sides are equal. When the pressures on both sides are inconsistent, the measurement diaphragm is displaced, and the displacement is proportional to the pressure difference. Therefore, the capacitances on both sides are not equal, and the oscillation and demodulation steps convert the pressure signal into a DC signal proportional to the pressure. After the A/D converter converts this DC signal into a digital signal and sends it to the microprocessor, the microprocessor sends the data to the D/A and HART communication circuits after linear fitting, damping, and other operations. The D/A converter converts a 4 to 20 mA analog signal from the microprocessor and the corrected digital signal and sends it to the output circuit. The EEPROM saves all configuration, characterization, and digital trimming data so that power is not lost. Pressure transmitters and absolute pressure transmitters work in the same way as differential pressure transmitters, except that the low pressure chamber pressure is atmospheric or vacuum. Mechanical Conveyor,Mechanical Chain Conveyor,Mechanical Belt Conveyor,Customized Mechanical Conveyor Dongguan City Li you machinery and Equipment Co., Ltd. , https://www.gdliyou.com
Smart Transmitter Operating Principle
Anhui Tiancai Cable Group Co., Ltd. is located in the scenic Tianchang City of Anhui Province. It is located in the historic city of Yangzhou in the east and Nanjing, the ancient capital of the Six Dynasties, in the south. It is a medium-sized enterprise specializing in the production of mining cables and instrumentation.
How smart transmitters work
In addition to performing linear fitting, damping, and other operations, smart transmitters also perform sensor linearization, reset measurement range, engineering unit conversion, damping, square root, output current forward and reverse selection, and sensor trimming, as well as diagnostics and numbers. Communication.