English
In today's industrial production process, pressure transmitters have become an indispensable part.
From mechanical manufacturing to chemical production, from aerospace to medical technology, the wide range of applications of pressure transmitters make our production processes more efficient, precise and intelligent.
First, the principle of pressure transmitter
Pressure transmitter is a kind of precision instrument which can convert pressure signal into electrical signal, and its core component is pressure sensor.
The pressure sensor uses a measuring chamber on an elastic diaphragm to convert the pressure signal into a deformation of the diaphragm, which is then converted into an electrical signal by a resistance strain gauge.
In the circuit, this electrical signal will be amplified, adjusted, and finally output in the form of 4~20mA current, or output digital signals through RS485 and other ways.
Second, the application of pressure transmitter
Pressure transmitters are widely used in the following fields:
In petroleum, petrochemical and chemical fields, it is equipped with throttling devices to provide flow measurement and control, and can measure the pressure and liquid level of pipelines and tanks.
Electric power, city gas, and other companies require high stability and high precision measurement.
Pulp and paper for use where chemical and corrosive liquids are required.
Steel, non-ferrous metals, ceramics, used for furnace pressure measurement and other requirements of high stability, high-precision measurement and other places, used in strict control (temperature, humidity, etc.) conditions require stable measurement.
Machinery, shipbuilding, used in places requiring stable measurements under conditions of strict control and high precision.
| Technical performance | |
| Reference accuracy: 0.2%FS, 0.5%FS | Stability: Better than 0.25% FS per year |
| Installation position impact: No impact Less than O. 15%/10℃ | Temperature influence (-15~50℃) Working voltage: 15V~30V DC |
| Allowable temperature | |
| Ambient temperature: -10 ° C to 70 ° C Storage temperature: -40℃~110℃ | Medium temperature: -40℃~120℃ Compensation temperature:15 ℃ to 50 ℃ |
| Structure and material | |
| Liquid diaphragm 316L stainless steel, Ha alloy | Process connector stainless steel |
| Fluorine rubber seals | Shell surface spray aluminum alloy, stainless steel |
| Protection level IP65 | |
1. Zero drift
Zero drift refers to the phenomenon that the output signal of the pressure transmitter changes when there is no pressure action. This can be due to temperature changes, mechanical vibrations, or other factors.
Take measures
Zero adjustment: Use the adjusting screw or digital regulator to adjust the zero to return the output signal to the correct zero.
Temperature compensation: Use the temperature compensation function to automatically adjust the zero point according to the current temperature.
Replace the sensor: If the zero drift is too frequent or cannot be corrected, the sensor may need to be replaced.
2. Full degree drift
Full drift refers to the phenomenon that the output signal of the pressure transmitter changes under full pressure. This can be caused by mechanical wear, aging of materials, or other factors.
Take measures
Adjust the full degree: Adjust the full degree using the adjusting screw or digital regulator to return the output signal to the correct full degree.
Replace the sensor: If the full drift is too frequent or cannot be corrected, the sensor may need to be replaced.
3. Poor linearity
Poor linearity means that there is an obvious nonlinear relationship between the output signal and the input signal of the pressure transmitter. This can be caused by poor sensor design or mechanical wear.
Take measures
Adjust linearity: Adjust linearity using adjustment screws or digital regulators to make the relationship between the output signal and the input signal more linear.
Replace the sensor: If the poor linearity is too severe or cannot be corrected, the sensor may need to be replaced.
4. Electrical faults
Electrical failure means that the output signal of the pressure transmitter is affected by electromagnetic interference or other electrical problems, resulting in unstable or inaccurate output signals.
Take measures
Check the cable connection: Check whether the cable connection is firm, loose or damaged.
Shielded cables: The use of shielded cables can reduce the impact of electromagnetic interference.
Replace the power supply: If the power supply is unstable or the voltage is insufficient, you may need to replace the power supply.
In today's industrial production process, pressure transmitters have become an indispensable part.
From mechanical manufacturing to chemical production, from aerospace to medical technology, the wide range of applications of pressure transmitters make our production processes more efficient, precise and intelligent.
First, the principle of pressure transmitter
Pressure transmitter is a kind of precision instrument which can convert pressure signal into electrical signal, and its core component is pressure sensor.
The pressure sensor uses a measuring chamber on an elastic diaphragm to convert the pressure signal into a deformation of the diaphragm, which is then converted into an electrical signal by a resistance strain gauge.
In the circuit, this electrical signal will be amplified, adjusted, and finally output in the form of 4~20mA current, or output digital signals through RS485 and other ways.
Second, the application of pressure transmitter
Pressure transmitters are widely used in the following fields:
In petroleum, petrochemical and chemical fields, it is equipped with throttling devices to provide flow measurement and control, and can measure the pressure and liquid level of pipelines and tanks.
Electric power, city gas, and other companies require high stability and high precision measurement.
Pulp and paper for use where chemical and corrosive liquids are required.
Steel, non-ferrous metals, ceramics, used for furnace pressure measurement and other requirements of high stability, high-precision measurement and other places, used in strict control (temperature, humidity, etc.) conditions require stable measurement.
Machinery, shipbuilding, used in places requiring stable measurements under conditions of strict control and high precision.
| Technical performance | |
| Reference accuracy: 0.2%FS, 0.5%FS | Stability: Better than 0.25% FS per year |
| Installation position impact: No impact Less than O. 15%/10℃ | Temperature influence (-15~50℃) Working voltage: 15V~30V DC |
| Allowable temperature | |
| Ambient temperature: -10 ° C to 70 ° C Storage temperature: -40℃~110℃ | Medium temperature: -40℃~120℃ Compensation temperature:15 ℃ to 50 ℃ |
| Structure and material | |
| Liquid diaphragm 316L stainless steel, Ha alloy | Process connector stainless steel |
| Fluorine rubber seals | Shell surface spray aluminum alloy, stainless steel |
| Protection level IP65 | |
1. Zero drift
Zero drift refers to the phenomenon that the output signal of the pressure transmitter changes when there is no pressure action. This can be due to temperature changes, mechanical vibrations, or other factors.
Take measures
Zero adjustment: Use the adjusting screw or digital regulator to adjust the zero to return the output signal to the correct zero.
Temperature compensation: Use the temperature compensation function to automatically adjust the zero point according to the current temperature.
Replace the sensor: If the zero drift is too frequent or cannot be corrected, the sensor may need to be replaced.
2. Full degree drift
Full drift refers to the phenomenon that the output signal of the pressure transmitter changes under full pressure. This can be caused by mechanical wear, aging of materials, or other factors.
Take measures
Adjust the full degree: Adjust the full degree using the adjusting screw or digital regulator to return the output signal to the correct full degree.
Replace the sensor: If the full drift is too frequent or cannot be corrected, the sensor may need to be replaced.
3. Poor linearity
Poor linearity means that there is an obvious nonlinear relationship between the output signal and the input signal of the pressure transmitter. This can be caused by poor sensor design or mechanical wear.
Take measures
Adjust linearity: Adjust linearity using adjustment screws or digital regulators to make the relationship between the output signal and the input signal more linear.
Replace the sensor: If the poor linearity is too severe or cannot be corrected, the sensor may need to be replaced.
4. Electrical faults
Electrical failure means that the output signal of the pressure transmitter is affected by electromagnetic interference or other electrical problems, resulting in unstable or inaccurate output signals.
Take measures
Check the cable connection: Check whether the cable connection is firm, loose or damaged.
Shielded cables: The use of shielded cables can reduce the impact of electromagnetic interference.
Replace the power supply: If the power supply is unstable or the voltage is insufficient, you may need to replace the power supply.
