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Ross Mont 3051 intelligent pressure transmitter working principle

Release time:2019-06-27

Ross Mont 3051 intelligent pressure transmitter working principle
        When working, the diaphragm and the filling liquid of the high and low pressure side convey the process pressure to the center.

In the filling liquid, the central filling fluid transfers pressure to the sensing diaphragm of the delta chamber sensor center. The sensing diaphragm is a tensioned elastic element whose displacement varies with the pressure difference (for the GP pressure transmitter, the atmospheric pressure is like the low pressure of the sensing diaphragm, and the AP absolute pressure transmitter keeps a reference voltage on the low voltage side). The maximum displacement of the sensing diaphragm is 0.004 inches (0.10 mm), and the displacement is directly proportional to the pressure. The capacitance plates on both sides detect the position of the sensing diaphragm. The difference between the capacitance between the sensing diaphragm and the capacitance plate is converted to the corresponding current, voltage or digital HATR output signal.
 
PCB module
The transmitter circuit board module adopts ASICS and surface encapsulation technology. The circuit block receives the digital signal and correction coefficient from the sensor's membrane head, and then corrects and highlights the signal. The output part of the PCB module converts the digital signal into an analog signal output, and it can communicate with the HATR handset. The optional night crystal head is inserted into the circuit board to display digital output in units of pressure engineering or percentage. Night crystal heads are suitable for standard transmitters and low power transmitters.
Data configuration
The configuration data is stored in the permanent EEPROM memory on the transmitter circuit board. The transmitter power cut data can still be saved, so the transmitter can work on an electric power. The number / mode conversion and signal transmission process variables are stored in a digital manner, which can be accurately modified and converted by the engineering units, and then the corrected data are converted into an analog output signal. The HATR hand-held device accesses the digital signal of the sensor without the need for digital / analog conversion to achieve higher accuracy.  Communication mode
The 1151 type intelligent transmitter uses HATR protocol communication. The protocol uses industrial standard bell202 shift keying (FSK) technology to superimpose a high frequency signal on the current output signal to achieve remote communication. It does not affect the consistency of the loop.
 
software function
The HATR protocol makes it easy for users to configure, test and set up 1151 intelligent pressure transmitters. Configuration 1151 intelligent can be easily configured with HATR handheld device. The configuration includes two aspects.
First, setting the operable parameters of the transmitter, including setting: zero point and range setting point. Linear or square root output. Damping engineering unit selection
Second, information data of transmitter can be stored to identify transmitter and physical description of transmitter. These data include: position number: 8 alphanumeric characters. Descriptors: 16 alphanumeric characters. Information: 32 alphanumeric characters. Date:. Integration head installation, flange type, flange material, liquid / exhaust valve material, O ring material, remote transmission device information
In addition to the above configurable parameters, the software of the 1151 intelligent pressure transmitter contains many non user modifiable information: transmitter type, sensor limit, minimum range, filling fluid, isolation diaphragm material, film head serial number, and transmitter software version.
1151 intelligent pressure transmitter can carry out continuous self test. If a problem is detected, the transmitter activates the user's optional analog output alarm. The HATR handset can be used to query the transmitter to determine the problem. The transmitter outputs specific information to the manual operator to identify the problem. It is fast and easy to repair. If the operator is convinced that the loop is a problem, the transmitter can provide specific output according to the requirements, and the common loop test is used.