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mini Differential transmitter price

time£º2019-07-26 16:24    source£ºoem pressure sensor

 Differential transmitter works

Differential transmitter works
The pressure transmitter measures the two pressures of the medium into the high and low pressure chambers. It acts on the isolating diaphragms on both sides of the δ element (ie, the sensitive element), and transmits it to the measuring film through the spacer and the filling liquid in the element. On both sides of the sheet. Measure the diaphragm and the electrodes on both sides of the insulating sheet to form a capacitor.
    When the pressures on both sides are inconsistent, the measuring diaphragm is displaced, and the displacement is proportional to the pressure difference. Therefore, the capacitance on both sides is not equal, and the signal is proportional to the pressure through the oscillation and demodulation steps. 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.
      The A/D converter converts the demodulator current into a digital signal whose value is used by the microprocessor to determine the input pressure value. The microprocessor controls the operation of the transmitter. In addition, it performs sensor linearization. Reset the measurement range. Engineering unit conversion, damping, square root, and sensor trimming operations, as well as diagnostics and digital communications.
    The microprocessor has a 16-byte program RAM and has three 16-bit counters, one of which performs A/D conversion.
      The D/A converter fine-tunes data from the microprocessor and the corrected digital signal, which can be modified by the transmitter software. The data is stored in the EEPROM and remains intact even if the power is turned off.
 

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