Last edited by Araktilar
Sunday, August 9, 2020 | History

2 edition of Platinum for resistance thermometry. found in the catalog.

Platinum for resistance thermometry.

Johnson, Matthey and Company Limited.

Platinum for resistance thermometry.

by Johnson, Matthey and Company Limited.

  • 157 Want to read
  • 14 Currently reading

Published by Johnson, Matthey and Co .
Written in


ID Numbers
Open LibraryOL20010695M

Platinum Resistance Thermometer Definition: The platinum thermal resistance (PTR) uses platinum for determining the temperature. It works on the principle that the resistance of platinum changes with the change of temperature. The thermometer measures the . Accurate resistance bridges are used to measure the ratio between the resistance of standard platinum resistance thermometers and a reference (standard) resistor at the level of microkelvin in temperature terms and as such play a critical role in the realisation and dissemination of the ITS For AC bridges, the ratio test unit has been available for some time, and for both AC and DC bridges.

Ultimate precision temperature data logger Temperature measurement with °C accuracy. The PT is a high-precision temperature measurement data logger. It uses PT and PT platinum resistance thermometers (PRTs) and an innovative design to deliver °C resolution and °C accuracy measurements from – °C to + °C. Contents Page uction 1 oundandbasicconcepts. 1 Thermodynamictemperaturescale 2 Practicaltemperaturescales 2 3.

It discusses the major issues link ed to platinum resistance thermometry for t he realization of the International Temperature Scale of in the temperature range fro m K to K. E Terminology Relating to Thermometry and Hydrometry. E Test Methods for Testing Industrial Resistance Thermometers. E Specification for Magnesium Oxide and Aluminum Oxide Powder and Crushable Insulators Used in the Manufacture of Base Metal Thermocouples, Metal-Sheathed Platinum Resistance Thermometers, and Noble Metal Thermocouples.


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Platinum for resistance thermometry by Johnson, Matthey and Company Limited. Download PDF EPUB FB2

Resistance/temperature relationship of metals. Common RTD sensing elements constructed of platinum, copper or nickel have a repeatable resistance versus temperature relationship (R vs T) and operating temperature R vs T relationship is defined as the amount of resistance change of the sensor per degree of temperature change.

The relative change in resistance (temperature. Platinum resistance thermometers (PRT) are the most accurate of all thermometer types and cover a remarkably wide temperature range. This chapter begins with a tutorial explanation of the physical origin of electrical resistance, and then describes the properties, construction and instrumentation of PRTs for various applications.

Platinum Resistance Thermometry One of reports in the series: NBS monograph available on this by: Another electrical temperature system is based on the use of a thermistor. The usual type of thermistor is a little bead of metal oxide, the resistance of which—unlike the platinum resistance thermometer—falls exponentially as the temperature rises (Fig.

Special thermistors, however, are also available in which resistance rises with. Temperature, Second Edition gives a comprehensive account of the principles of thermometry over the range K to about K. The book focuses on various topics on the field of thermometry such as the full description Platinum for resistance thermometry.

book the ITS, its practical application and preparation; accounts of total radiation thermometry and acoustic gas thermometry using spherical resonators; and the development. Characterisation of a selection of AC and DC resistance bridges for standard platinum resistance thermometry J.V.

Pearce, J. Gray, R.I. Veltcheva National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, United Kingdom Abstract Accurate resistance bridges are used to measure the ratio between the resistance of standard platinum.

LABFACILITY THERMOCOUPLE & PLATINUM RESISTANCE THERMOMETRY – AT A GLANCE THERMOCOUPLE THERMOCOUPLE ACCURACIES Tolerance classes for thermocouples to IEC () (Amend ) BS EN() Fe-Con (J) Class 1.

Resistance Thermometry The Electrical Resistance of Metals, Alloys and Semiconductors The Resistivity of A Pure Metal As A Function of Temperature The Resistivity of A Semiconductor As A Function of Temperature The High-Precision Platinum Resistance Thermometer Industrial Platinum Resistance Thermometry The Rhodium/0.

THERMOMETRY Thermometry is the science and practice of temperature measurement. Any measurable change in a thermometric probe (e.g. the dilatation of a liquid in a capillary tube, variation of electrical resistance the of a conductor, of refractive index the a.

Full text of "Annealing of platinum for thermometry" See other formats Journal of Research of the National Bureau of Standards Vol. 47, No. 2, August Research Paper Annealing of Platinum for Thermometry Robert J.

Corruccini Experiments are described on the annealing of platinum wire in which the coefficient of resistance and thermal electromotive force were used as criteria of the. The platinum resistance thermometer is a versatile instrument for temperature measurement in the range from — ° to °C.

It is used both for precision measurements of the highest accuracy and for routine industrial work. This article discusses the development and construction of resistance thermometers and their uses in a wide range of industries.

Request PDF | Platinum Resistance Thermometry | Platinum resistance thermometers (PRT) are the most accurate of all thermometer types and cover a remarkably wide temperature range. This chapter. FUNDAMENTALS OF THERMOMETRY PART IV MEASURING THE RESISTANCE OF STANDARD PLATINUM RESISTANCE THERMOMETERS by Henry E.

Sostmann ABSTRACT The Standard Platinum Resistance Thermometer, acronym SPRT, is the stipulated interpolation instrument for realizing the International Temperature Scale of between the defining fixed.

bridges normally associated with high-accuracy platinum resistance thermometry. Thermistors are also available with selected performance characteristics, including interchangeability to °C, aged and selected for stability, as well as qualification for military and space applications.

^uraZT.'] PlatinumThermometryat11iffhTemperatures. pt=ioou1 R—R B /N ' (1) *M00 " whereR=observedresistanceatthetemperature,t°, R=" " "o°C, ^,00="." "ioo°C.

FUNDAMENTALS OF THERMOMETRY PART V INDUSTRIAL PLATINUM RESISTANCE THERMOMETERS by Henry E. Sostmann, and COMMON ERRORS IN INDCJSTRIAL MEASUREMENT by John P.

Tavener INDUSTRIAL PLATINUM RESISTANCE THERMOMETERS ABSTRACT The interpolation standard stipulated in the International Temper. Both standard-platinum-resistance thermometers and industrial-resistance thermometers are examined, and details on a variety of resistance-measuring techniques are given.

Also included is a final version of the official text of the International Temperature Scale (ITS). The authors of this volume are John J.

Connolly and E. Corina Horrigan. By using built-in or external standard resistors, resistance thermometry bridges measure resistance ratios with high accuracy, which are indicative of the temperature, among other things. These instruments are not only used in the field of temperature measurement, but − due to their high accuracy − also in electrical laboratories.

resistance values between fixed temperature points. Platinum The resistance/temperature characteristic for standard platinum resistance thermometers, as defined by the ITS– 90 (International Temperature Scale of ), is a complex set of equations beyond the scope of this document.

Industrial platinum resistance thermometer elements, manufactured to BSrequire that the temperature coefficient of resistance, the α value of the pure platinum wire should be ×10 − value is determined from the relationship between the resistance of the element at the steam point (R ) and its resistance at the ice point (R 0), where.

Platinum Resistance Thermometry [Riddle, John L.; Furukawa, George T.;Plumb, Harmon H.] on *FREE* shipping on qualifying offers. Platinum Resistance.Platinum Resistance Thermometry APPENDIX 2: Typical resistance ratios and sensitivity factors for SPRTs in the ITS, as well as the propagation of uncertainty at the triple point of water Consultative Committee for Thermometry under the auspices of the International Committee for .Additional Physical Format: Online version: Riddle, John L.

Platinum resistance thermometry. [Washington] National Bureau of Standards; [for sale by the Supt. of Docs.