Practical Pyrometry: The Theory, Calibration and Use of Instruments for the Measurement of High Temperatures (Classic Reprint) Book

PRACTICAL PYROMETRYCHAPTER I STANDARD TEMPERATURE SCALES1. The Comparison of Temperatures. - Lengths can be directly measured by means of a foot rule, a meter bar, a surveyor's chain or other standard of length. Similarly, volumes can be measured in terms of some standard of volume such as a gallon, bushel, or cubic foot. Temperatures, however, cannot be directly measured. In fact, temperatures can be compared only indirectly in terms of some property which changes in magnitude when temperature changes. For example, since when under constant pressure the length and volume of most substances increase as their temperature increases, changes of length and volume can be used for the comparison of temperatures.Again, since the pressure of a fixed mass of gas kept at constant volume increases when the temperature of the gas is raised, changes in the pressure of a gas under these conditions can be used as a measure of the changes of temperature.If a circuit be formed of wires of two Table of Contents CONTENTS; CHAPTER I; STANDARD TEMPERATURE SCALES; Abt Paob; 1 The Comparison of Temperatures I; 2 Scales of Temperature 2; 3 The Centigrade and Fahrenheit Degrees 3; 4 The Thermodynamic Temperature Scale 4; 5 The Ideal Gas Temperature Scale 5; 6 The Normal Thermometer G; 7 The Black-body Temperature Scale 8; 8 The Application of the Three Standard Temperature Scales 10; CHAPTER II RESISTANCE PYROMETRY; 9 Relation between Resistance and Temperature 12; 10 The Wheatstone Dridge 12; 11 Direct Reading Resistance PyrometerB 14; 12 The Availability of Resistance Pyrometers to Industrial Use 15; 13 Recording Resistance Pyrometers 16; Exp I Calibration of-a Resistance Pyrometer 20; CHAPTER III THERMOELECTRIC PYROMETRY; 14 The Seebeck Effect 24; 15 Application to Temperature Measurement 25; 1G Choice of Metals for Thermoelectric Couples 26; 17 The Construction of Thermoelectric PyrometersRead More