Design and development of a high precision thermocouple based smart industrial thermometer with on line linearisation and data logging feature

作者：Sarma Utpal^*; Boruah P K

来源：Measurement, 2010, 43(10): 1589-1594.

DOI：10.1016/j.measurement.2010.09.003

• Thermocouple linearisation
• On line data logging
• Industrial thermometer

Design and development of a high precision thermometer for industrial application is described in this paper. A class-1 grade K-type Thermocouple is considered for this purpose. The conditioned signal is linearised using a 9th order polynomial based on National Institute of Standards and Technology (NIST) data with the help of a 12-bit analog-to-digital converter and a 8-bit microcontroller. The cold junction compensation is achieved using a serial synchronous temperature to digital converter. The linearised data is transmitted for remote monitoring and logging via RS232C. The system is calibrated with 20 calibration point from 0 degrees C to 200 degrees C with a low cost calibration setup. The precision index of the system is also calculated.

• 出版日期2010-12