Integrated temperature transmitter is introduced

Integrated temperature transmitter is introduced

integrated temperature transmitter is modern industrial field, the update products, scientific research institutes temperature measurement and control is necessary for collecting and distributing system, digital bus system. Generally by the temperature measuring probe ( The thermocouple or heat resistance sensor) And the two wire system solid electronic units. In the form of solid module temperature measuring probe directly installed on the terminal box, thus forming the integration of the transducer. Integrated temperature transmitter with thermal resistance and thermocouple generally fall into two types.

integrated temperature transmitter has simple structure, saves the wire, big output signal, strong anti-interference ability, good linear, simple display instrument, solid module earthquake moisture-proof, reverse connection protection and current limiting protection, reliable work, etc. The output of the integrated temperature transmitter for unification of 4 ~ 20 ma signal; Can be used with microcomputer system or other conventional instrument match. Can also be user requirements in explosion-proof type or fire type measuring instrument.

heat resistance temperature transmitter is the R/V conversion unit, the benchmark unit, linear circuit, reverse connect protection, current limiting protection, V/I conversion unit, etc. Measuring temperature resistance signal amplification, and then by linear circuit of temperature compensate nonlinear relationship with the resistance, after the V/I conversion circuit outputs a measured a linear relationship with temperature and constant current signal of 4 ~ 20 ma.

the temperature transmitter by the reference source, cold junction compensation, amplifier unit, linearization, V/I conversion, broken accidentally processing, reverse connect protection, current limiting circuit protection units. It is the cold junction compensation of thermocouple thermoelectric potential enlarged, cap again by linear circuits eliminate the nonlinear error of thermoelectric potential and temperature, the final amplification into 4 ~ 20 ma current output signal. In order to prevent the thermocouple measurement by thermocouple wire break and make the temperature control failure caused by accident, transmitter will also include a power protection circuit. When the thermocouple wire break or pick up solution, transmitter will output the maximum value ( 28mA) In order to make the instrument to cut off the power supply.