Correct selection of pressure transmitter
The pressure transmitter is a pressure sensor that outputs a standard signal. When choosing to use a pressure transmitter, you need to determine the following conditions to properly select the pressure transmitter.
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The pressure transmitter is a pressure sensor that outputs a standard signal. The following conditions need to be determined when choosing to use a pressure transmitter:
1. Confirm the type of pressure measurement Pressure type mainly includes gauge pressure, absolute pressure and differential pressure. Gauge pressure refers to the pressure based on the atmosphere, less than or greater than atmospheric pressure; absolute pressure refers to the absolute pressure zero as the benchmark, higher than the absolute pressure; differential pressure refers to the difference between the two pressures.
2. Confirm the correctness level The measurement error of the transmitter is divided according to the correctness level. The different accuracy corresponds to different basic error limits (expressed as the percentage of full-scale output). In practical applications, the selection is based on the control requirements of the measurement error and in accordance with the principle of economic use.
3. Confirm the working temperature range. The measured medium temperature should be within the working temperature range of the transmitter. If it is used over temperature, it will produce a large measurement error and affect the service life. In the production process of the pressure transmitter, it will have temperature. The measurement is measured and compensated to ensure that the measurement error caused by the temperature of the product is within the range required by the accuracy level. In the case of high temperature, you can consider the choice of high temperature pressure transmitter or the installation of condensing tubes, radiators and other auxiliary cooling measures.
4. Confirm the compatibility of the measuring medium and the contact material. In some measurement occasions, the measuring medium is corrosive. In this case, it is necessary to select materials compatible with the measuring medium or perform special processing to ensure that the transmitter is not damaged.
Confirm pressure interface form
5. In the company's products with threaded connection (M27 × 2) as the scale interface form, if the customer needs other special interface forms, can be designed and produced according to customer requirements.
Confirm power supply and output signal
6. The company's pressure transmitter is powered by DC 24V power supply, providing a variety of output signal options, including 4 ~ 20mA, 0 ~ 5VDC, 1 ~ 5VDC, 0 ~ 20mA with 485 digital output.
7. Confirm the on-site working environment and other needs to know whether there is vibration and electromagnetic interference, etc., and provide relevant information when selecting the type for the corresponding treatment. Others, such as electrical connections, can also be considered depending on the situation.
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