文档介绍：Department of Energy
Fundamentals Handbook
INSTRUMENTATION AND CONTROL
Module 1
Temperature Detectors
Temperature Detectors TABLE OF CONTENTS
TABLE OF CONTENTS
LIST OF FIGURES .................................................. ii
LIST OF TABLES ................................................... iii
REFERENCES ..................................................... iv
OBJECTIVES ...................................................... v
RESISTANCE TEMPERATURE DETECTORS (RTDs) ........................ 1
Temperature .................................................. 1
RTD Construction .............................................. 2
Summary .................................................... 4
THERMOCOUPLES ................................................. 5
Thermocouple Construction ....................................... 5
Thermocouple Operation ......................................... 6
Summary .................................................... 7
FUNCTIONAL USES OF TEMPERATURE DETECTORS ...................... 8
Functions of Temperature Detectors .................................. 8
Detector Problems .............................................. 8
Environmental Concerns .......................................... 9
Summary .................................................... 9
TEMPERATURE DETECTION CIRCUITRY ............................... 10
Bridge Circuit Construction ...................................... 10
Bridge Circuit Operation ........................................ 12
Temperature Detection Circuit ..................................... 14
pensation ....................................... 15
Summary ................................................... 16
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LIST OF FIGURES Temperature Detectors
LIST OF FIGURES
Figure 1 Electrical Resistance-Temperature Curves ......................... 2
Figure 2 Internal Construction of a Typical RTD .......................... 3
Figure 3 RTD Protective W