Product Overview
This series of pressure transmitters adopts imported high-quality diffused silicon and ceramic pressure sensors as sensitive elements, and uses dedicated integrated modules. Through precise compensation for temperature drift, zero point, and nonlinearity, they achieve accurate measurement and transmission of pressure changes in media such as liquids, gases, and steam.
Product Features
1. Adopt high-quality sensors and dedicated V/I integrated circuits, with few peripheral components, ensuring high reliability and easy maintenance.
2. Small in size, light in weight, and extremely convenient for installation and commissioning.
3. Comprehensive and reasonable design, available in general type, anti-corrosion type, intrinsic safety explosion-proof type, and isolated explosion-proof type, providing customers with a wide range of choices.
4. Aluminum alloy castinghousing, three-terminal isolation, and high-temperature baked paint protective layer, ensuring sturdiness and durability.
5. 4~20mA DC two-wire signal transmission, featuring strong anti-interference ability and long transmission distance.
6. Three types of indicating meters (LED, LCD, and pointer), enabling convenient on-site reading.
7. Suitable for measuring viscous, crystalline, and corrosive media.
8. Equipped with dedicated HART intelligent communication, delivering superior performance.
What to Do If a Diffused Silicon Pressure Transmitter Malfunctions?
The following is an analysis of the causes and solutions:
1. During installation, the pressure-sensitive element of the diffused silicon pressure transmitter should be axially perpendicularto the direction of gravity. If installation conditions are limited, adjust the zero point of the diffused silicon pressure transmitter to the standard value after fixed installation.
2. Residual pressure cannot be released, so the zero point of the sensor fails to return to normal. The best way to eliminate this issue is toremove the sensor and directly check if the zero point is normal; if it is normal, replace the sealing ring and test again.
3. The output of the diffused silicon pressure transmitter does not change when pressure is applied, but suddenly changes when more pressure is applied, and the zero point cannot return after pressure relief. This phenomenon is most likely caused by thesealing ring of the pressure sensor.
4. Check whether the power supply meets the requirements and whether there isany wiring error between the power supply, the diffused silicon pressure transmitter, and the load equipment. If there is no voltage at the terminal of the diffused silicon pressure transmitter or the polarity is reversed, the transmitter will fail to output a voltage signal.
5. The housings of the pressure sensor and diffused silicon pressure transmitter generally need to be grounded. Signal cables must not be laid together with power cables. Strong electromagnetic interference should be avoided around the sensor and transmitter. During use, the sensor and transmitter should undergo periodic verificationin accordance with industry regulations.
6. When selecting pressure sensors and diffused silicon pressure transmitters, users should fully understand the working conditions of the pressure measurement system and make reasonable selections based on needs, to ensure the system operates in the optimal state and reduce project costs.
7. Pressure is transmitted to both sides of the measuring diaphragm through the isolation diaphragm and the filling fluid inside the element. The measuring diaphragm and the electrodes on the insulating plates on both sides form a capacitor respectively.
8. It is required toinspect the diffused silicon pressure transmitter once a week and calibrate it once a month. The main tasks include removing dust inside the instrument, carefully inspecting electrical components, and regularly verifying the output current value. Since the interior of the diffused silicon pressure transmitter uses weak electricity, it must be isolated from external strong electricity.
