The working principle of input level transmitter is to measure the static pressure of the liquid which is proportional to the depth of the liquid level, and convert it into a standard current and voltage signal output through the amplification circuit to establish a linear comparison between the output signal and the depth of the liquid level, and to realize the measurement of the depth of the liquid. In the use of input level transmitter, there will be some faults on the scene, now we will teach you some troubleshooting and troubleshooting methods. Failure 1: no signal output of input level transmitter This phenomenon occurs first we have to check whether the input level transmitter is powered. Without power, the input level transmitter can not work. Secondly, we should also look at whether the wiring of the input level transmitter is normal. The wiring of input level transmitter is divided into two-wire, three-wire and four-wire system. It is decided according to the different output methods chosen by the user. Solution: Correctly supply power to the input level transmitter according to the wiring diagram. Failure 2: Input level transmitter output irregularly jumps when the liquid level is constant. Stronger RF interference on site is the main problem that produces this phenomenon, mainly the start of large power equipment, operation stops the interference and high harmonic interference. For the use of shielded cable is the second reason for the above reasons, shielded wire is to reduce the external electromagnetic field on the power supply or communication lines and the impact of a specially adopted wire with a metal braid shell. Solution: Use shielded cable for input level transmitter and ground the shield effectively. Failure 3: When the input level transmitter does not sense the liquid level, the corresponding output value is not correct. Each instrument has its own unique working environment requirements, and input level transmitters are no exception. The wrong working environment will lead to the input level transmitter can not work properly, resulting in serious malfunction of the output data, for example, conventional input level transmitter measurement medium temperature of -40 ~ 60 ℃, if the measurement of high-temperature media above 60 ℃, the corresponding output of the input level transmitter will be out of order. Solution: Move the input level transmitter to the specified environment or take measures to make the environment meet the requirements. Star Instruments Sensor Manufacturing Co., Ltd. is a collection of research and development, production, sales as one of the high-tech enterprises. Specializing in the production of pressure transmitters, level transmitters, temperature transmitters, temperature and humidity transmitters, differential pressure transmitters, soil moisture transmitters, 3051 transmitters and related instrumentation accessories. Many products under the brand of Star Instruments have obtained a number of patents issued by the state, such as CE certification, IS9001 certification, SGS certification, TüV SüD certification, explosion-proof certification and so on. For product consultation, product customization, agency, technical inquiries, quotations, etc., please contact Star Instruments: 400-600-4496 !