Title :
A linear temperature transmitter based on Pt100
Author :
Ximin, Liu ; Hongwei, Ren ; Enping, Zhang
Author_Institution :
Sch. of Control Sci. & Eng., Jinan Univ., Jinan
Abstract :
A temperature transmitter is introduced for linear temperature measurement with high accuracy by using platinum thermal resistor. It consists of AD 580, resistor, amplifier, AD converter, data sampling and processing system, digital display, serial output port, DA converter, 4-20 mA.DC output and so on. The method of single comparing is used to find thermal resistance value with high accuracy; then the value is mapped to the corresponding temperature by looking into reference table. Therefore, linearity is implemented, which greatly reduces the impact of temperature-drift and non-linearity in amplifier. In addition, the device implements the measuring of full temperature range of the reference table. The test error is plusmn6degC in -200degC ~850degC with B class platinum thermal resistor.
Keywords :
temperature measurement; temperature sensors; thermal resistance; Pt100; linear temperature measurement; linear temperature transmitter; temperature -200 degC to 850 degC; thermal resistance value; thermal resistor; Displays; Electrical resistance measurement; Linearity; Platinum; Resistors; Sampling methods; Temperature distribution; Temperature measurement; Thermal resistance; Transmitters; Reference table; Temperature measuring; Thermal resistor;
Conference_Titel :
Control Conference, 2008. CCC 2008. 27th Chinese
Conference_Location :
Kunming
Print_ISBN :
978-7-900719-70-6
Electronic_ISBN :
978-7-900719-70-6
DOI :
10.1109/CHICC.2008.4605109
