Manufacturing tolerances are present in industrial thermometers. These are associated with air gaps and the insulant packing between the sensing element and sheath. Theoretical and experimental results are presented to show the effects of these on the thermal response. Experiments involved various liquids and air. The results indicate that both the air gaps and the insulant packing significantly influence the thermal response. The temperature of the medium appears to have an influence on the porosity of the insulant.
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References
1.
KerlinT. W.ChohanR. K.Dynamic response of temperature sensors. In Handbook of applications of measuring instruments—electrical instruments (Ed. MooreR. L.), 1985, Ch. 15 (Wiley, New York).
2.
ChohanR. K.KerlinT. W.Testing of temperature sensors in different liquids. Report to Oak Ridge National Laboratory, Tennessee, 1984.
3.
ChohanR. K.AbdullahF.Mathematical modelling of thermal transducers for temperature measurement. IMEKO Conference published as Temperature measurement in industry and science, 1981, pp. 238–245 (Dun Tectinky CSTVTS, Prague).
4.
ChohanR. K.Mathematical modelling of industrial thermometers. PhD Thesis, 1983, The City University, London.
5.
ChohanR. K.NatourM.KerlinT. W.Theoretical modelling of temperature sensors (to be submitted).
6.
CarrollR. M.ShepardR. L.The effects of temperature on the response time of thermocouples and resistance thermometers. Paper presented at the Symposium on Industrial Temperature Measurement, Knoxville, Tennessee, 1984.
7.
HashemianH.KerlinT. W.Experience with RTD response time testing in nuclear power plants. Paper presented at the Symposium on Industrial Temperature Measurement, Knoxville, Tennessee, September 1984.
8.
JohnstonJ. Paper presented at the Conference on Temperature Measurement, National Physical Laboratory and the Institute of Physics, 1975.
9.
ChohanR. K.AbdullahF.FinkelsteinL.Mathematical modelling of industrial thermometers (to be published in Trans. Inst. Measurements and Control).
10.
KerlinT. W.ChohanR. K.NatourM.The effects of fluid conditions and properties on the response time of temperature sensors (to be submitted).
11.
ChohanR. K.KerlinT. W.Experimentation for the dynamic response of industrial temperature sensors (submitted to Trans. Inst. Measurement and Control, 1985).
12.
ChohanR. K.KerlinT. W.NatourM.Testing of temperature sensors in dry/moist air (to be submitted).
13.
ChohanR. K.Industrial thermometry: dynamic response, usage environment and sensor location (submitted to Trans. Inst. Measurement and Control, 1985).
14.
KerlinT. W.ShepardR. L.Industrial temperature measurement, 1982 (Instrument Society of America).
15.
ChohanR. K.AbdullahF.Mathematical modelling of thermal transducers. Report, The City University, London, 1985.
