PT100 temperature sensor 3 wire connection

by:Thermistor-Mov     2020-04-05
Pt100, that is, its resistance at 0 degrees to 100 ohms, pt100 temperature sensor is a kind of platinum ( Pt) Of resistance temperature sensor, belongs to the resistivity, its resistance and the relation between the temperature changes are as follows: R = Ro ( 1 +αT) 。 Then, small make up just like you talk about three root conductor connection PT100 temperature sensor PT100 temperature sensor three conductor connection: PT100 platinum resistance sensor has three lead, can use A, B, C ( Or black, red, yellow) To represent the three lines, three lines between has the following pattern: between A and B or C resistance temperature at around 110 euro, 0 o between B and C, B and C in the inside is straight, in principle, there is no difference between B and C. PT100 temperature sensor on the sensor's fixed terminal has three: A line after A fixed on the instrument by sensor terminals. B and C on the instrument of the other two fixed terminal, B and C line location are interchangeable, but have to plug in. If indirectly by long term, in the three specifications and length of the wire to the same. Thermal resistance of line 3 and line 4 connection: it is to use two lines, three lines, four lines, mainly make ( Optional) With the secondary instrument to decide. General display instrument with three line connection, PT100 carry out a line, the other end of the two lines, all instrument, instrument internal offset through the bridge wire resistance. General PLC for the four lines, each set out two lines, two PLC output constant current source, the PLC through the two measuring the voltage on the PT100, is also in order to offset the lead resistance, high degree of * * *, four line three line can also be, two line * low, need to consider the specific usage accuracy requirement and cost dear customer: hello, our company is a strong technical force of highly qualified to develop a group, to provide customers with high-quality products, complete solution, and the best technical services company. The main products are humidity sensors, temperature sensors, temperature transmitter, etc. This enterprise uphold sincerity, with the purpose of the implementation of quality and with enterprising societe generale, with a firmer step climb the new peak unceasingly, contribute to national automation industry, welcome new and old customers to rest assured the choose and buy the desired products. We will serve you wholeheartedly!
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