Anhui Chunhui vibration transmitterThe integrated vibration transmitter combines traditional vibration sensors and precision measurement circuits to achieve a high-precision vibration measurement system. This product can be directly connected to systems such as PLC and DCS for use.
Anhui Chunhui vibration transmitters are mainly installed on bearing covers of various rotating mechanical devices (such as steam turbines, compressors, motors, fans, and pumps), and can measure vibration velocity or amplitude. It is a transmitter that generates output signals by cutting magnetic field lines with a moving coil, so it only requires a DC24V power supply during operation, and is easy to install and maintain.
Anhui Chunhui vibration transmitterPaired with shear type piezoelectric acceleration sensors, it is mainly used for vibration monitoring of large rotating machinery. According to requirements, the effective values of vibration acceleration, velocity or peak displacement can be integrated and converted into 4-20mA current output or 1-5V voltage output. It can be connected to PLC and DDS systems for on-site display and is particularly suitable for long-term state monitoring in harsh environments.
Anhui Chunhui vibration transmitterThe advantages are:
1. Not easily affected by parasitic thermocouples and resistance drop and temperature drift along the wire, can be used with very cheap and thinner wires; Can save a lot of cable and installation costs;
2. When the output resistance of the current source is large enough, the voltage induced in the wire loop through magnetic field coupling will not have a significant impact because the current caused by the interference source is extremely small. Generally, twisted pair cables can be used to reduce interference; Two wire and three wire systems must use shielded wires, and the shielding layer of the shielded wire must be properly grounded;
3. Capacitive interference can cause errors related to receiver resistance. For a 4-20mA two-wire loop, the receiver resistance is usually 250 Ω (sampling Uout=1-5V), which is small enough to produce significant errors. Therefore, the allowable wire length is longer and farther than that of a voltage telemetry system;
4. Each individual reading device or recording device can be switched between different channels of varying wire lengths, without causing differences in accuracy due to differences in wire lengths, achieving decentralized collection. The benefits of decentralized collection are: decentralized collection, centralized control;
5. Using 4mA for zero level makes it very convenient to determine open and short circuits or sensor damage (0mA state);
6. It is very easy to add one or two lightning and surge protection devices at the two-wire output port, which is beneficial for safe lightning and explosion prevention.