Under what circumstances should a temperature transmitter be used?
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This post was last edited by yunrun on 2019-1-10 at 14:30. The temperature transmitters mentioned in the post refer primarily to those modules installed within the sensor junction boxes on site; this post shares applications where it is appropriate to use temperature transmitters in 4 different situations. 1. When the temperature sensing point is located far away from the instrument control room, the millivolt signal from the thermocouple or the resistance signal from the thermal resistor is converted by a temperature transmitter into a 4-20mA signal suitable for long-distance transmission. This approach not only eliminates the distortion that can occur during the long-distance transmission of temperature sensor signals, but also prevents various interference signals from being introduced during transmission. It also saves the cost of expensive compensation wires or three-core cables, thereby helping to reduce installation costs. http://yunrun.com.cn/upload/201812/25/201812251247592869.png Under what circumstances are temperature transmitters suitable for use? yunrun.com.cn/tech/2311.html Ways in which interference can be introduced by temperature transmitters in control rooms; 2. Control systems that require high precision and stability in temperature measurement. 3. The accuracy of the temperature transmitters YR-ER213 or YR-ER211 is 0.1%, and they maintain good stability over a period of five years ； Changes in ambient temperature, supply voltage, and external load resistance have little effect on the output of the temperature transmitter. Theoretically, the maximum transmission distance for a 2-wire 4-20mA signal from a temperature transmitter is 1200 meters. 4. Projects for which the design parameters have not yet been determined, and in which the temperature readings need to vary within a certain range. The temperature transmitters YR-ER213 or YR-ER211 allow the input type and range of the temperature sensor to be changed through programming configuration, facilitating user use. Low-power and interference-resistant circuit design, advanced software algorithms, as well as high-quality imported electronic components enable the temperature transmitter to feature extremely low temperature drift, low power consumption, and high stability. The temperature transmitters mentioned in the article are shown in the following images: http://yunrun.com.cn/upload/201812/25/201812250209233475.png http://yunrun.com.cn/upload/201812/25/201812250209341494.png http://yunrun.com.cn/upload/201812/25/201812250211446032.png Intelligent temperature transmitters, HART temperature transmitters, and on-site display temperature transmitters
Thanks for sharing. Both the formatting and content are worth learning*.
I’ve learned it! \ud83d\udc4d
It’s too expensive; the advantages can be achieved with unified card modules
Use temperature transmitters in areas prone to electromagnetic interference
Are all temperature sensors these days equipped with cold-end compensation? ?
Temperature transmitter with cold junction compensation! Cold-end compensation only works at the thermocouple input
What level of compensation accuracy is currently achievable? Compared to compensation wires, I prefer integrated temperature compensation as well, but accuracy should be considered first
I bought a temperature transmitter compatible with Type E thermocouples, but the temperature drift was extremely severe. The transmitter cost 30 yuan, and I think the problem lies with the transmitter itself.