Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-28T03:04:05.514Z Has data issue: false hasContentIssue false
  • English
  • Français

Improvements in calibration at silver or Copperpoint

Published online by Cambridge University Press:  19 April 2010

J. P. Tavener
J. P. Tavener*
Affiliation:
Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England
*
* Correspondence:info@isotech.co.uk
Get access

Abstract

The main purpose of the paper is to describe the construction and performance of a newand novel Silver and Copper point system that combines a conventional ingot of silver orcopper in a graphite crucible, with a specially designed heat dewar or heat siphon to forma single entity. Furthermore, to add above this entity a heated collar to exactlycompensate for heat losses upwards and the stem conduction effects of the thermometerbeing calibrated. The overall construction contains no glass parts, is rugged, compact andtransportable. Its performance is similar to large quartz clad cells in floor standingheat pipe apparatus at a fraction of the size and cost.

Keywords

Silver point systemCopper point systemCAFMET2010article
Type
Research Article
Information
International Journal of Metrology and Quality Engineering , Volume 1 , Issue 1 , 2010 , pp. 41 - 44
Copyright
© EDP Sciences 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

J.P. Tavener, Improvements Relating to the Calibration of Thermometers, NCSLi, 2009
Supplementary Information for the ITS-90, p. 67, ISBN, 92-822-2111-3
M. Megharfi, Realization of Open Copper Fixed Point Cells for Thermocouple Calibration. BNM-LNE Paris, Temperature, Vol. 7 (2003)
N.P. Moiseera, A.I. Pokhodum, Approximation of the ITS-90 with High Temperature Thermometers up to 1085 °C, Temperature, Vol. 7 (2003)
A.D. McLachlan, The Stability of the Freezing Point of Copper as a Temperature Standard, Temperature – Its Measurement and Control in Science and Industry (The Instrument Society of America, 1972), Vol. 4
J.P. Evans, High Temperature Platinum Resistance Thermometry, Temperature – Its Measurement and Control in Science and Industry (The Instrument Society of America, 1972), Vol. 4
Edler, F., Intercomparison of Copper Fixed Point Cells by Pt/Pd Thermocouples, Int. J. Thermophys. 29, 171 (2005) CrossRefGoogle Scholar
F. Righini, A New Determination of the Freezing Point of Copper (IMGC, Italy)