The power supply of the temperature transmitter must not have spikes, otherwise the transmitter may be easily damaged. The calibration of the transmitter should be carried out 5 minutes after power-on, and pay attention to the ambient temperature at the time. When measuring high temperature (>>100℃), the sensor cavity and the junction box should be separated by filling materials to prevent the transmitter from being burnt due to the excessive temperature of the junction box. When the sensor is used under severe interference, the housing should be firmly grounded to avoid interference. The power supply and signal output should be transmitted by Ф10 shielded cable, and the crimping nut should be tightened to ensure air tightness.
contents
- 1. What is a temperature transmitter
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2. Working principle of temperature transmitter
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3. The role of temperature transmitter
1. What is a temperature transmitter
The temperature transmitter adopts thermocouple and thermal resistance as the temperature measuring element, and the output signal from the temperature measuring element is sent to the transmitter module, after voltage stabilization filtering, operational amplification, nonlinear correction, V/I conversion, constant current and reverse After the protection Circuit is processed, it is converted into a 4-20mA current signal 0-5V/0-10V voltage signal which is linearly related to the temperature, and the RS485 digital signal is output.
2. Working principle of temperature transmitter
A temperature transmitter is a device that can convert physical measurement signals or ordinary electrical signals into standard electrical signal output or can be output in a communication protocol. It is mainly used for the measurement and control of industrial process temperature parameters. The current transmitter converts the AC current of the main circuit under test into a constant current loop standard signal, which is continuously transmitted to the receiving device.
3. The role of temperature transmitter
The function of the temperature transmitter is to convert the resistance signal into a current signal, which is input to the meter to display the temperature. Used in petroleum, chemical, chemical fiber; textile, rubber, building materials; electric power, metallurgy, medicine; food and other industrial fields on-site temperature measurement process control; especially suitable for computer measurement and control systems, and can also be used with instruments.
