Diffusion silicon pressure transmitter common fault
Diffused silicon pressure transmitters are widely used in petroleum, chemical, steel, electric power, light industry, environmental protection and other industrial fields to achieve gauge, negative or absolute pressure measurement and control of various fluid pressures. And it can be applied to a variety of harsh and hazardous environments and corrosive media. UV Laser
UV (Ultraviolet) lasers include DPSS (diode-pumped solid-state) Laser and diode laser. The laser head comes with cooling and precise temperature control system, and power supply comes with overcurrent and overheating protection function. CNI lasers have stabilized power, easy operation, reliable performance and long lifetime. The laser products include 5 series: high energy, high power, high stability, low noise and Single Frequency Laser. Free space or fiber-coupled (SM fiber, MM fiber, homogenization fiber) output available. They are widely used in raman spectra, holographic photography, Lithography, etc.
Following wavelength are available for ultraviolet laser : 257 nm 349 nm 395 nm 261 nm 351 nm 397 nm 266 nm 355 nm 400 nm 303 nm 360 nm 320 nm 375 nm
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1. During installation, the pressure sensitive component of the transmitter should be perpendicular to the direction of gravity. If the installation conditions are limited, the transmitter zero position should be adjusted to the standard value after installation.
2, the residual pressure can not be released, so the zero position of the sensor can not come down. The reason for eliminating this cause is to remove the sensor and directly check whether the zero position is normal. If the zero position is normal, replace the seal and try again.
3. The output of the pressurized transmitter does not change, and the output of the pressurized transmitter suddenly changes, and the pressure relief transmitter can't go back. The cause of this phenomenon is most likely caused by the pressure sensor seal.
4. Whether it meets the power supply requirements; there is no wiring error between the power supply and the transmitter and the load device. If there is no voltage on the transmitter terminal or the polarity is reversed, the transmitter can output no voltage signal.
5. The outer casing of the pressure sensor and transmitter should be grounded. The signal cable should not be mixed with the power cable. Strong electromagnetic interference should be avoided around the sensor and transmitter. Sensors and transmitters should be periodically verified in accordance with industry regulations during use.
6. When selecting the pressure sensor and transmitter, the user should fully understand the working conditions of the pressure measurement system, make reasonable selection according to the needs, make the system work in good condition, and reduce the project cost.
7. Transfer to the sides of the measuring diaphragm through the spacer and the filling liquid in the component. The measuring diaphragm and the electrodes on the insulating sheets on both sides each constitute a capacitor.
8. The pressure transmitter is required to be inspected once a week, once a month. It is mainly to remove the dust inside the instrument, and carefully check the electrical components. The current value of the output should be checked frequently. The pressure transmitter is weak inside. It must be separated from the outside world by strong electricity.
