The user manual and installation method of PMP51 pressure transmitter are generally based on the principle of piezoresistive, 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 of the E+H pressure transmitter 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 transmitter and pipeline together, a heat pipe should be used and a pressure transformer 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 to avoid direct impact of the measured medium on the E+H pressure transmitter 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.

During the use of E+H pressure transmitters, the following situations should be considered: 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 at the high end of the process pipeline, and the transmitter should also be installed at 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, 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, the E+H pressure transmitter installed outdoors must take anti freezing measures to prevent the liquid in the pressure inlet from expanding due to freezing volume and damaging the sensor; When measuring liquid pressure, the installation position of the 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. The E+H pressure transmitter should prevent rainwater and other leakage into the transmitter housing through the cable.

The user manual and installation method of PMP51 pressure transmitter are important components of the automatic control system. Pressure transmitters are mainly used for measuring and controlling pressure parameters in industrial processes, and their applications are widely used in fields such as petroleum, chemical, and power. There are many types of pressure transmitters, and there are different classification methods based on their working principles and purposes. Pressure transmitters are mainly used for remote display and control of pressure, and they often work in environments such as high temperature, low pressure, corrosion, and vibration, with a high probability of failure. E+H pressure transmitters use special adhesives to bond strain gauges together and generate mechanical strain. When the body is subjected to changes in force, the resistance strain gauges will also undergo certain deformation, which will affect the resistance value and change the voltage on the resistance. However, in this case, the change in resistance is relatively high and small. Usually, a strain bridge is formed, and the E+H pressure transmitter becomes larger under the action of the instrument amplifier, and then transmitted to the processing circuit display or actuator.