Pressure Transmitters The capacitive transmitter has a variable-capacity sensing assembly in the body, called a “δ†chamber. The sensor is a completely enclosed component. We know that the process pressure and differential pressure cause displacement through the isolating diaphragm and the filling liquid silicone oil to the sensing diaphragm. When the capacitance difference between the sensing diaphragm and the two capacitor plates is converted by the electronic components (4 to 20) Two-wire output of the mA signal. This is the mechanism.
And we know that the electronic amplifier circuit consists of a demodulator, an oscillator, an oscillation control amplifier, a current detector, a current control amplifier, a current limit controller, a reference voltage, a voltage regulator, and the like. Through their detection of the capacitive signal, which controls the oscillation frequency, and then convert it into a current output, such a process can drive its work.
In the long-term operation of differential pressure transmitters, there are a variety of faults. When dealing with faults, careful detailed observation and analysis should be performed to determine the general location of the fault and the solution steps, and then debugging and testing should be started. This can achieve a multiplier effect. In addition, the user is reminded to note that the meter must be calibrated and qualified after being repaired before it can be put into normal use. At this moment, we understand the pressure transmitter's working mechanism and troubleshooting.
And we know that the electronic amplifier circuit consists of a demodulator, an oscillator, an oscillation control amplifier, a current detector, a current control amplifier, a current limit controller, a reference voltage, a voltage regulator, and the like. Through their detection of the capacitive signal, which controls the oscillation frequency, and then convert it into a current output, such a process can drive its work.
In the long-term operation of differential pressure transmitters, there are a variety of faults. When dealing with faults, careful detailed observation and analysis should be performed to determine the general location of the fault and the solution steps, and then debugging and testing should be started. This can achieve a multiplier effect. In addition, the user is reminded to note that the meter must be calibrated and qualified after being repaired before it can be put into normal use. At this moment, we understand the pressure transmitter's working mechanism and troubleshooting.
The system controller process decides when processes should be started or stopped depending on system state variables. It checks if other processes have produced information to be processed or to pass information to them for processing. The controller usually loops continuously, polling sensors and other processes for events or state changes. For this reason, this model is sometimes called an event-loop model.
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