Fast Multichannel Precision Thermometer

Fast Multichannel Precision Thermometer

This paper describes a fast multichannel precision thermometer working in a temperature range from -50degC to +40degC. Thermistors are used as temperature sensing elements. A detailed discussion of the choice of thermistor and design of the circuitry is given. It is shown that accuracy similar to th...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 2007-10, Vol.56 (5), p.2002-2009
Hauptverfasser: Schweiger, H.-G., Multerer, M., Gores, H.J.
Format: Artikel
Sprache:eng
Schlagworte:
Accuracy
Calibration
Circuit stability
Circuit testing
Deviation
Instrumentation
Laboratories
Multichannel
NTC
Platinum
precision thermometry
resistance thermometer
Stability
Stability analysis
Temperature distribution
temperature measurement
temperature sensor
Temperature sensors
Thermal stability
thermistor
Thermistors
thermometer
Thermometers
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Beschreibung
Zusammenfassung:This paper describes a fast multichannel precision thermometer working in a temperature range from -50degC to +40degC. Thermistors are used as temperature sensing elements. A detailed discussion of the choice of thermistor and design of the circuitry is given. It is shown that accuracy similar to that of calibrated platinum thermometers can be achieved by calibration of thermistors. During our tests, the accuracy of the thermometer was both mathematically and experimentally analyzed in detail. The stability of 30 thermistors after six months of laboratory use was analyzed. Deviations smaller than 30 mK in the range from -50degC to+10degC were observed.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2007.904480