Installation and detection of pressure transmitter

Pressure transmitter is widely used in petroleum, chemical industry, metallurgy, food, electric power, medicine, paper making, textile and other industries, mainly used to detect the differential pressure, pressure, absolute pressure, flow, liquid level and density of fluid.

Installation and detection of pressure transmitter:

1, should be installed in a ventilated, dry, non-corrosive, cool and small temperature changes. For example, if it is installed in the open air, it is necessary to add a protective cover to avoid direct sunlight and rain, so as to avoid product performance degradation or failure.

2. It is forbidden to knock, impact, disassemble and use strong clamping or poke the pressure hole or metal diaphragm with sharp instruments.

3. Read the product manual carefully before installing the pressure transmitter, and make correct wiring. Pay attention to the wiring error of the product.

4. When measuring the liquid medium, the air in the pipeline must be exhausted by a stop valve before pressurization to prevent the sensor from being overloaded due to the high pressure generated by compressed air.

5. It is forbidden to use it beyond the target overload.

6. Pay attention to the protection of the cable leading out of the product, and the cable joint must be sealed to avoid the influence of water or moisture on the performance and life of the whole machine. The lead wire at the back end of the transmission should ensure good conduction with the atmosphere.

7. When measuring steam or other high-temperature media, be careful not to make the working temperature of the transmitter exceed the limit. When necessary, add a pressure pipe or other cooling device for connection.

8. When installing the pressure transmitter, a pressure cut-off valve should be installed between the transmitter and the medium, so as to repair and prevent the pressure inlet from being blocked and affect the measurement accuracy. In the case of large pressure fluctuation range, a pressure buffer device should also be installed.

9. When the flameproof transmitter is used in dangerous places, the shell cover of the transmitter must be tightened. In order to ensure the safety of use, the safety regulations should be strictly observed, and it is forbidden to open the shell cover of the transmitter during power-on.

Analysis on Maintenance Methods of Pressure Transmitter

Patrol inspection, regular maintenance and overall equipment inspection of pressure transmitter can protect our pressure transmitter well from these three aspects.

Patrol inspection: the instrument indicates the situation, and the value indicated by the instrument is abnormal; Environmental temperature, humidity and cleanliness; Whether there is leakage or corrosion between instrument and process interface, pressure guide pipe and valve.

Regular maintenance: check the zero point regularly and check it regularly; Regularly discharge sewage, condensate and vent; Purge the pressure guide pipe of the easily blocked medium regularly, and fill the isolation liquid regularly.

Equipment inspection: check the quality of the instrument to be accurate and sensitive, the indication error and static pressure error meet the requirements, and the zero position is correct; Instrument parts are intact, without serious rust and damage, nameplate is clear and correct, fasteners must not be loose, connectors are in good contact, and terminal wiring is firm.

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