E+H pressure transmitter manufacturer

E+H pressure transmitterUsually, it is due to the specifications of the sealing ring (too soft or too thick). When the sensor is tightened, the sealing ring is compressed into the sensor pressure port, blocking the sensor. When the pressure is high, the pressure medium cannot enter. However, when the pressure is very high, the sealing ring suddenly opens, and the pressure sensor changes due to the pressure. When the pressure drops again, the sealing ring returns to its original position and blocks the pressure port. The remaining pressure cannot be released, so the sensor position cannot be lowered. The method to eliminate this cause is to remove the sensor and directly check if the position is normal. If it is normal, replace the sealing ring and try again. Due to its small measurement range, the self weight of the sensing element in the pressure transmitter will affect the output of the micro differential pressure transmitter. Therefore, the position change of the E+H pressure transmitter during installation of the micro differential pressure transmitter is a normal situation. During installation, the axial direction of the pressure sensitive part of the transmitter shall be perpendicular to the gravity direction. If the installation conditions are limited, the transmitter position shall be adjusted to the standard value after installation and fixation.

E+H pressure transmitterDuring use, attention should be paid to the following situations: preventing the transmitter from coming into contact with corrosive or overheated media; preventing slag from depositing in the conduit; When measuring liquid pressure, the pressure tap should be opened on the side of the process pipeline to avoid sedimentation and slag accumulation; When measuring gas pressure, the pressure tap should be opened in the process pipeline, and the transmitter should also be installed on the upper part of the process pipeline to facilitate the injection of accumulated liquid into the process pipeline; The pressure pipe should be installed in a place with small temperature fluctuations; When measuring steam or other high-temperature media with an E+H pressure transmitter, a condenser such as a buffer tube (coil) should be connected, and the working temperature of the transmitter should not exceed the upper limit; When freezing occurs in winter, transmitters installed outdoors must take anti freezing measures to prevent the liquid in the pressure inlet from expanding due to freezing and damaging the sensor; When measuring liquid pressure, the installation position of the E+H pressure transmitter should avoid the impact of the liquid (water hammer phenomenon) to prevent damage to the sensor due to overpressure; When wiring, thread the cable through the waterproof joint (accessory) or flexible tube and tighten the sealing nut to prevent rainwater and other substances from leaking into the transmitter housing through the cable.

E+H pressure transmitterGenerally based on the principle of piezoresistive resistance, which means that the resistance of the varistor changes after being compressed, and pressure detection can be carried out by amplifying it with an amplifier and calibrating it with standard pressure. Precautions for pressure transmitter operation: Do not use a voltage higher than 36V on the transmitter, as it may cause damage. Do not touch the diaphragm with hard objects, as it may damage the diaphragm. The measured medium cannot freeze, otherwise the isolation diaphragm of the sensor element is prone to damage, leading to the destruction of the transmitter. When measuring steam or other high-temperature media, the temperature should not exceed the limit temperature of the transmitter during use, otherwise a heat dissipation device must be used. When measuring steam or other high-temperature media, in order to connect the E+H pressure transmitter and pipeline together, heat dissipation pipes should be used and pressure transformers on the pipeline should be used. When the measured medium is water vapor, an appropriate amount of water should be injected into the heat dissipation pipe to prevent overheated vapor from directly contacting the transmitter and causing damage to the sensor. During the pressure transmission process, several points should be noted: air leakage at the connection between the transmitter and the heat dissipation pipe; Be careful when opening the valve of the E+H pressure transmitter to avoid direct impact of the measured medium and damage to the sensor diaphragm; It is necessary to keep the pipeline unobstructed to avoid sediment in the pipeline popping out and damaging the sensor diaphragm.