{"id":463851,"date":"2024-10-20T10:31:07","date_gmt":"2024-10-20T10:31:07","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/asme-ptc-19-3-2024\/"},"modified":"2024-10-26T19:23:52","modified_gmt":"2024-10-26T19:23:52","slug":"asme-ptc-19-3-2024","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/asme\/asme-ptc-19-3-2024\/","title":{"rendered":"ASME PTC 19.3 2024"},"content":{"rendered":"

The methods for temperature measurement and the protocols used for data transmission are provided in this Code. Guidance is given for setting up the instrumentation and determining measurement uncertainties. Information regarding the instrument type, design, applicable temperature range, accuracy, output, and relative cost is provided. Information on temperature-measuring devices that are not normally used in field environments is given in Mandatory Appendices I, II, and III.<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nCONTENTS <\/td>\n<\/tr>\n
8<\/td>\nNOTICE <\/td>\n<\/tr>\n
9<\/td>\nFOREWORD <\/td>\n<\/tr>\n
10<\/td>\nASME PTC COMMITTEE ROSTER <\/td>\n<\/tr>\n
11<\/td>\nCORRESPONDENCE WITH THE PTC COMMITTEE <\/td>\n<\/tr>\n
14<\/td>\nSection 1 General
1-1 OBJECT
1-2 SCOPE
1-3 DEFINITIONS
1-4 TEMPERATURE SCALES
1-4.1 Thermodynamic Temperature Scale <\/td>\n<\/tr>\n
15<\/td>\n1-4.2 Units of Measurement for Temperature
1-5 SENSOR AND GAUGE TYPES <\/td>\n<\/tr>\n
16<\/td>\n1-6 THERMOWELLS AND PROTECTION TUBES
Tables
Table 1-5-1 Typical Temperature Ranges <\/td>\n<\/tr>\n
17<\/td>\n1-7 OTHER ACCESSORIES
Table 1-6-1 Factors That Influence Strength and Measurement <\/td>\n<\/tr>\n
18<\/td>\n1-8 INSTALLATION AND PROCESS EFFECTS
1-8.1 Placement Recommendations
1-8.2 Conduction Error <\/td>\n<\/tr>\n
19<\/td>\n1-8.3 Radiation Error
1-8.4 Aerodynamic Heating Effect <\/td>\n<\/tr>\n
20<\/td>\n1-8.5 Heat Transfer at Low Velocity
1-8.6 Heat Transfer at High Velocity <\/td>\n<\/tr>\n
21<\/td>\n1-8.7 Gradients and Stratifications
1-8.8 Speed of Response Contributing to Dynamic Error <\/td>\n<\/tr>\n
22<\/td>\n1-9 UNCERTAINTY
1-9.1 Uncertainty Due to Random Error <\/td>\n<\/tr>\n
23<\/td>\n1-9.2 Uncertainty Due to Systematic Error
1-10 CONCLUSIONS
1-11 REFERENCES
1-11.1 Cited References <\/td>\n<\/tr>\n
27<\/td>\n1-11.2 Additional References <\/td>\n<\/tr>\n
28<\/td>\nSection 2 Thermocouple Temperature Measurements
2-1 THERMOCOUPLES
2-1.1 Scope
2-1.2 Definition
Figures
Figure 2-1.2-1 Thermocouple Thermometer Systems <\/td>\n<\/tr>\n
29<\/td>\n2-1.3 Principles of Operation
2-1.4 Thermocouple Construction and Terminology
Figure 2-1.4-1 Typical Industrial Sheathed Thermocouple With Transition to Lead Wires <\/td>\n<\/tr>\n
30<\/td>\nFigure 2-1.4-2 Hollow Tube Construction Thermocouple With Continuous Leads and Ground Wire <\/td>\n<\/tr>\n
31<\/td>\nFigure 2-1.4-3 Ungrounded Thermocouple With No Housing or Transition <\/td>\n<\/tr>\n
32<\/td>\nTable 2-1.4-1 Specification Information by Thermocouple Calibration Type <\/td>\n<\/tr>\n
33<\/td>\nFigure 2-1.4.2-1 Laboratory Thermocouple With \u201cT\u201d Stem Reference Junction
Table 2-1.4-2 Recommended Upper Temperature Limits for Protected Thermocouples by Wire Size <\/td>\n<\/tr>\n
35<\/td>\n2-1.5 Thermocouple Element Materials <\/td>\n<\/tr>\n
37<\/td>\n2-1.6 Thermocouple Characteristics <\/td>\n<\/tr>\n
38<\/td>\nTable 2-1.6.1-1 Temperature emf Relationship for Base Metal and Noble Metal Thermocouples <\/td>\n<\/tr>\n
39<\/td>\n2-2 THERMOCOUPLE ACCESSORIES
2-3 APPLICATION AND INSTALLATION
2-3.1 Sources of Error <\/td>\n<\/tr>\n
40<\/td>\n2-3.2 Essential Considerations <\/td>\n<\/tr>\n
41<\/td>\n2-3.3 Treatment of Data
Figure 2-3.2-1 Thermocouples Connected in Series
Figure 2-3.2-2 Thermocouples Connected in Parallel <\/td>\n<\/tr>\n
43<\/td>\n2-4 ADVANTAGES AND DISADVANTAGES
2-4.1 Advantages
2-4.2 Disadvantages
2-5 THERMOCOUPLE INSTRUMENTATION
2-5.1 General <\/td>\n<\/tr>\n
44<\/td>\n2-5.2 emf-Measuring Devices
2-5.3 Scanners\/Multiplexers <\/td>\n<\/tr>\n
45<\/td>\n2-5.4 Accuracy of the emf Measurement and Noise
Table 2-5.2-1 Typical Thermocouple Card Accuracy and Drift <\/td>\n<\/tr>\n
46<\/td>\n2-5.5 Reference Junction Apparatus <\/td>\n<\/tr>\n
48<\/td>\nFigure 2-5.5.8-1 A Zone-Box Circuit Involving Only One Reference Junction <\/td>\n<\/tr>\n
49<\/td>\nSection 3 Resistance Temperature Detectors (RTDs)
3-1 SCOPE
3-2 DEFINITIONS <\/td>\n<\/tr>\n
50<\/td>\nFigure 3-2-1 Pad-Style RTD Element
Figure 3-2-2 Averaging RTD in a Duct <\/td>\n<\/tr>\n
51<\/td>\nFigure 3-2-3 Thin-Film Element
Figure 3-2-4 Wire-Wound Element <\/td>\n<\/tr>\n
52<\/td>\n3-3 PRINCIPLES OF OPERATION AND SPECIFICATION CHARACTERISTICS
3-3.1 RTD Accuracy Specifications
Figure 3-3-1 Typical Industrial Platinum Resistance Thermometer <\/td>\n<\/tr>\n
53<\/td>\nTable 3-3.1-1 Industrial RTD Tolerance Specification Table (U.S. Customary)
Table 3-3.1-1M Industrial RTD Tolerance Specification Table (SI) <\/td>\n<\/tr>\n
54<\/td>\n3-3.2 Specification of RTD Lead Wires
Table 3-3.1-2 Thin Film Versus Wire Wound Elements <\/td>\n<\/tr>\n
55<\/td>\n3-3.3 Temperature Coefficient of Resistance or Alpha, \u03b1
Figure 3-3.2-1 RTD Wire Color Code by Standard <\/td>\n<\/tr>\n
56<\/td>\n3-3.4 Platinum Resistance Element Temperature-Resistance Relationships
3-3.5 Measurement Considerations Particular to RTDs <\/td>\n<\/tr>\n
57<\/td>\n3-4 LESS COMMONLY USED RESISTANCE ELEMENTS
Table 3-3.5.1-1 Maximum Applied Current for RTDs by Nominal Resistance <\/td>\n<\/tr>\n
58<\/td>\n3-4.1 Copper Resistance Thermometer
3-4.2 Nickel Resistance Thermometer
3-4.3 Nickel\u2013Iron Resistance Thermometer <\/td>\n<\/tr>\n
59<\/td>\nSection 4 Principles of Operation for Filled-System Thermometers
4-1 SCOPE
4-2 DEFINITIONS
4-3 PRINCIPLES OF OPERATION
Figure 4-2-1 Filled-System Thermometer <\/td>\n<\/tr>\n
60<\/td>\n4-4 CLASSIFICATION
4-4.1 General Classification
4-4.2 Subclassification <\/td>\n<\/tr>\n
61<\/td>\nFigure 4-4.2.1-1 Fully Compensated Liquid, Mercury, or Gas-Filled Thermal System \u2014 Class IA, Class IIIA, or Class VA
Figure 4-4.2.1-2 Fully Compensated Liquid, Mercury, or Gas-Filled Thermal System \u2014 Class IB, Class IIIB, or Class VB <\/td>\n<\/tr>\n
62<\/td>\nFigure 4-4.2.2-1 Vapor Pressure Thermal System \u2014 Class IIA
Figure 4-4.2.2-2 Vapor Pressure Thermal System \u2014 Class IIB <\/td>\n<\/tr>\n
63<\/td>\nFigure 4-4.2.2-3 Vapor Pressure Thermal System \u2014 Class IIC <\/td>\n<\/tr>\n
64<\/td>\n4-5 DESCRIPTION
4-5.1 Bulb Size
Figure 4-4.2.2-4 Vapor Pressure Thermal System \u2014 Class IID <\/td>\n<\/tr>\n
65<\/td>\nTable 4-5.1-1 Approximate Bulb-Sensitive Dimensions <\/td>\n<\/tr>\n
66<\/td>\nTable 4-5.1-2 Comparison of Thermal Systems <\/td>\n<\/tr>\n
67<\/td>\nFigure 4-5.1-1 Vapor Pressure\u2013Temperature Curves <\/td>\n<\/tr>\n
68<\/td>\n4-6 MATERIALS OF CONSTRUCTION
4-6.1 Bulb Materials
4-6.2 Thermowell Materials
4-6.3 Capillary Materials
4-7 CHARACTERISTICS
4-7.1 Maximum and Minimum Temperatures
4-7.2 Range <\/td>\n<\/tr>\n
69<\/td>\n4-7.3 Sensitivity
4-7.4 Accuracy
4-7.5 Temperature Compensation <\/td>\n<\/tr>\n
70<\/td>\n4-7.6 Response
Figure 4-7.6-1 Bulb Response Versus Bulb O.D. in Water (Velocity of 2.5 fps) <\/td>\n<\/tr>\n
71<\/td>\n4-8 ACCESSORIES
Figure 4-7.6-2 Bulb Response Rate in Air at Various Velocities <\/td>\n<\/tr>\n
72<\/td>\n4-9 APPLICATION AND INSTALLATION
4-9.1 Sources of Error
Figure 4-7.6-3 Preformed Capillary Bulb <\/td>\n<\/tr>\n
73<\/td>\n4-10 ESSENTIAL CONSIDERATIONS <\/td>\n<\/tr>\n
74<\/td>\n4-11 ADVANTAGES AND DISADVANTAGES
4-11.1 Advantages
4-11.2 Disadvantages
Figure 4-10.1-1 Attachment of Thermal Systems to Vessels <\/td>\n<\/tr>\n
75<\/td>\nSection 5 Thermistor Thermometry
5-1 SCOPE
5-2 DEFINITIONS
5-3 PRINCIPLES OF OPERATION
5-4 CLASSIFICATION
5-4.1 Description <\/td>\n<\/tr>\n
76<\/td>\n5-5 MATERIALS OF CONSTRUCTION
5-6 CHARACTERISTICS
5-6.1 Temperature-Resistance Relationship
Figure 5-3-1 Resistance Versus Temperature for 10-k\u03a9 NTC Thermistor <\/td>\n<\/tr>\n
77<\/td>\n5-6.2 Interchangeability
5-6.3 Range and Accuracy
5-6.4 Precision and Sensitivity
5-6.5 Response
5-7 APPLICATION AND INSTALLATION
5-7.1 Sources of Error <\/td>\n<\/tr>\n
78<\/td>\n5-8 INTEGRATION INTO AUTOMATED MEASUREMENT SYSTEMS
5-9 TREATMENT OF DATA
5-10 ADVANTAGES AND DISADVANTAGES
5-10.1 Advantages
5-10.2 Disadvantages <\/td>\n<\/tr>\n
79<\/td>\nSection 6 Calibration of Temperature Sensors
6-1 SCOPE
6-2 SELECTION OF CALIBRATION VENDORS
6-3 TEMPERATURE SCALES
6-4 THERMODYNAMIC TEMPERATURE SCALE <\/td>\n<\/tr>\n
80<\/td>\n6-5 IDEAL GAS SCALE
6-6 INTERNATIONAL TEMPERATURE SCALE
6-7 PLATINUM RESISTANCE THERMOMETRY
6-7.1 General
Table 6-6-1 Relations for Realizing the ITS-90 <\/td>\n<\/tr>\n
81<\/td>\n6-7.2 ITS-90 SPRT Specifications
6-8 METHODS OF CALIBRATION
6-8.1 Calibration by Fixed Points
Table 6-7.1-1 Subranges of ITS-90 for Platinum Resistance Thermometers <\/td>\n<\/tr>\n
82<\/td>\n6-8.2 Calibration by Comparison to Primary and Working Standards
Table 6-8.1-1 Fixed Points of ITS-90
Table 6-8.2.1-1 Comparison of SPRTs Secondary Reference PRTs and Industrial RTDs <\/td>\n<\/tr>\n
83<\/td>\n6-9 CALIBRATION EQUIPMENT
6-9.1 Comparators (Heat and Cold Sources Such as Dry Wells)
Table 6-8.2.2-1 Typical Reference Working Standards <\/td>\n<\/tr>\n
84<\/td>\n6-9.2 Meters
6-9.3 Computer Automation Programs
6-10 CALIBRATION OUTPUTS <\/td>\n<\/tr>\n
85<\/td>\n6-11 CALIBRATION INTERVALS
6-12 CALIBRATION CONSIDERATIONS SPECIFIC TO SENSOR TYPE
6-12.1 Thermocouples
Table 6-11-1 NIST\u2019s GMP 11 Calibration Intervals for Temperature Sensors <\/td>\n<\/tr>\n
86<\/td>\nTable 6-12.1.1-1 Accuracies Attainable Using Fixed Point Techniques
Table 6-12.1.1-2 Accuracies Attainable Using Comparison Techniques in Laboratory Furnaces (Type R or Type S Standard)
Table 6-12.1.1-3 Accuracies Attainable Using Comparison Techniques in Stirred Liquid Baths
Table 6-12.1.1-4 Tungsten\u2013Rhenium-Type Thermocouples <\/td>\n<\/tr>\n
87<\/td>\n6-12.2 RTD Calibrations and Temperature Coefficients
Table 6-12.1.1-5 Accuracies Attainable Using Comparison Techniques in Special Furnaces (Optical Pyrometer Standard) <\/td>\n<\/tr>\n
88<\/td>\nTable 6-12.1.2-1 Secondary Reference Points <\/td>\n<\/tr>\n
89<\/td>\nMANDATORY APPENDIX I NONCONTACT THERMOMETERS
I-1 SCOPE
I-2 DEFINITIONS <\/td>\n<\/tr>\n
90<\/td>\nI-3 PRINCIPLES OF OPERATION <\/td>\n<\/tr>\n
91<\/td>\nFigure I-3.2-1 Planck\u2019s Blackbody Radiation Distribution Function, Showing Spectral Band Used by an Automatic Optical Pyrometer at 0.65 \u00b5m <\/td>\n<\/tr>\n
92<\/td>\nFigure I-4.1-1 Schematic Diagram of an Optical Pyrometer
I-4 CLASSIFICATION <\/td>\n<\/tr>\n
93<\/td>\nFigure I-4.3-1 Schematic Optical System of Automatic Optical Pyrometers \u2014 Variable Radiance Comparison-Lamp Type <\/td>\n<\/tr>\n
94<\/td>\nFigure I-4.3-2 Electronic System Block Diagram for Automatic Optical Pyrometer \u2014 Variable Radiance Comparison-Lamp Type <\/td>\n<\/tr>\n
95<\/td>\nFigure I-4.4-1 Single Mirror Radiation Thermometer
Figure I-4.5-1 Double Mirror Radiation Thermometer
I-5 CHARACTERISTICS <\/td>\n<\/tr>\n
96<\/td>\nFigure I-4.6-1 Lens-Type Radiation Thermometer <\/td>\n<\/tr>\n
97<\/td>\nFigure I-6-1 Potentiometer Circuit
I-6 ACCESSORIES
I-7 APPLICATION AND INSTALLATION <\/td>\n<\/tr>\n
100<\/td>\nTable I-7.4-1 Spectral Emissivity of Materials, Smooth Surface, Unoxidized <\/td>\n<\/tr>\n
101<\/td>\nTable I-7.4-2 Spectral Emissivity of Oxides With Smooth Surfaces <\/td>\n<\/tr>\n
104<\/td>\nTable I-7.5.2-1 Window Corrections <\/td>\n<\/tr>\n
105<\/td>\nTable I-7.5.4-1 Emissivity and Transmittance Corrections <\/td>\n<\/tr>\n
106<\/td>\nI-8 ADVANTAGES AND DISADVANTAGES <\/td>\n<\/tr>\n
107<\/td>\nFigure II-2-1 Bimetallic Thermometer
MANDATORY APPENDIX II BIMETALLIC THERMOMETERS
II-1 SCOPE
II-2 DEFINITIONS <\/td>\n<\/tr>\n
108<\/td>\nII-3 PRINCIPLES OF OPERATION <\/td>\n<\/tr>\n
109<\/td>\nFigure II-3.1-1 Bimetallic Thermometer Bulb
Figure II-3.1-2 Nomenclature <\/td>\n<\/tr>\n
110<\/td>\nFigure II-3.2-1 Industrial Bimetallic Thermometer: Straight Form
Figure II-3.2-2 Industrial Bimetallic Thermometer: Sectional View of Angle Form <\/td>\n<\/tr>\n
111<\/td>\nII-4 CHARACTERISTICS
II-5 ACCESSORIES
II-6 APPLICATION AND INSTALLATION <\/td>\n<\/tr>\n
112<\/td>\nII-7 ADVANTAGES AND DISADVANTAGES <\/td>\n<\/tr>\n
113<\/td>\nMANDATORY APPENDIX III LIQUID-IN-GLASS THERMOMETERS
III-1 SCOPE
III-2 LIQUID-IN-GLASS THERMOMETER TYPES AND TERMS
III-3 PRINCIPLES OF OPERATION
III-4 CLASSIFICATION <\/td>\n<\/tr>\n
114<\/td>\nFigure III-2-1 Partial, Total, and Complete Immersion Thermometer Types <\/td>\n<\/tr>\n
115<\/td>\nFigure III-4.2-1 Straight Industrial Thermometer With Swivel Nut, Mounted in a Well
Figure III-4.2-2 90-deg Back Angle Industrial Thermometer With Swivel Nut and Union Bushing Connection <\/td>\n<\/tr>\n
116<\/td>\nTable III-5.1-1 Temperature Exposure Limits for Various Thermometer Glasses
III-5 MATERIALS OF CONSTRUCTION <\/td>\n<\/tr>\n
117<\/td>\nTable III-5.2-1 Working Temperature Range for Liquids Commonly Used
III-6 CHARACTERISTICS <\/td>\n<\/tr>\n
118<\/td>\nIII-7 ACCESSORIES
III-8 APPLICATION AND INSTALLATION <\/td>\n<\/tr>\n
119<\/td>\nFigure III-8.1-1 Thermometer Calibrated for Total Immersion and Used for Partial Immersion <\/td>\n<\/tr>\n
120<\/td>\nFigure III-8.1-2 Emergent Stem Corrections for Liquid-in-Glass Thermometers <\/td>\n<\/tr>\n
123<\/td>\nIII-9 ADVANTAGES AND DISADVANTAGES <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

ASME PTC 19.3-2024 Temperature Measurement<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASME<\/b><\/a><\/td>\n2024<\/td>\n129<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":463857,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2643],"product_tag":[],"class_list":{"0":"post-463851","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-asme","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/463851","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/463857"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=463851"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=463851"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=463851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}