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JJF 1637-2017: Calibration Specification for Base Metal Thermocouples
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Calibration Specification for Base Metal Thermocouples
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JJF 1637-2017
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Basic data | Standard ID | JJF 1637-2017 (JJF1637-2017) | | Description (Translated English) | Calibration Specification for Base Metal Thermocouples | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A54 | | Classification of International Standard | 17.200 | | Word Count Estimation | 27,273 | | Date of Issue | 2017-09-26 | | Date of Implementation | 2018-03-26 | | Older Standard (superseded by this standard) | JJG 351-1996 | | Quoted Standard | JJF 1007-2007; GB/T 4989-2013; GB/T 16701-2010; GB/T 16839.1; GB/T 16839.2; GB/T 30429-2013 | | Regulation (derived from) | General Administration of State Quality Inspection Announcement 2017 No. 78 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | | Summary | This standard applies to measuring range -40 ��C ~ 1200 ��C, length not less than 500mm, removable nickel-chromium-nickel-silicon (K type), nickel-chromium-silicon-nickel-silicon-magnesium (N type), nickel-chromium-copper-nickel (E Type), iron - copper nickel (J type) cheap metal thermocouple (hereinafter referred to as school thermocouple) calibration. | JJF 1637-2017: Calibration Specification for Base Metal Thermocouples---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Standard Specification for Calibrated Thermocouple)
People's Republic of China National Measurement Specifications
Low metal thermocouple calibration specification
Calibration Specification for BaseMetalThermocouples
2017-09-26 Posted
2018-03-26 implementation
General Administration of Quality Supervision, Inspection and Quarantine released
Low metal thermocouple calibration specification
Instead of JJG351-1996
The focal point. National Temperature Measurement Technical Committee
The main drafting unit. Liaoning Province Institute of Metrology
Participate in the drafting unit. China Aviation Industry Corporation Beijing Great Wall Measurement and Testing Technology Institute
Liaoyang City thermal measurement experiment plant
Dalian Institute of Measurement and Testing
Fuxin metrology test institute
This specification entrusts the national temperature measurement technical committee to be responsible for explaining
The main drafters of this specification.
Hou Sulan (Liaoning Province Institute of Metrology)
Wang Hao (Liaoning Provincial Institute of Metrology)
Participate in the drafters.
Liang (Liaoning Institute of Metrology)
Lv Guoyi (China Aviation Industry Corporation Beijing Great Wall Measurement and Testing Technology Institute)
National Army (Liaoyang measurement thermal experiment plant)
Li Ying (Dalian Institute of Measurement and Testing)
Xu Xiaofeng (Fuxin Metrology Testing Institute)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2 References (1)
3 Terms (1)
3.1 compensation wire (1)
4 Overview (1)
5 Metrology (1)
5.1 thermocouple thermoelectric power and temperature indication deviation (1)
6 Calibration conditions (2)
6.1 Environmental conditions (2)
6.2 Measurement standards and other equipment (2)
7 Calibration Items and Calibration Methods (3)
7.1 Calibration Items (3)
7.2 Visual inspection (3)
7.3 Calibration Methods (4)
7.4 Data Processing (4)
8 Calibration Results (6)
9 time interval of correction (6)
Appendix A Thermocouple Reference Calibration Temperature Point Selection (7)
Appendix B thermocouple temperature indication deviation calculation example (8)
Appendix C Thermocouple with compensation wire calibration method (10)
Appendix D standard platinum and rhodium 10-platinum thermocouple thermal emf calculation method (12)
Appendix E Thermocouple Calibration Original Record Reference Format (14)
Appendix F Thermocouple Calibration Results Reference Format (15)
Appendix GK, N, E, J thermocouple thermoelectric power allowable deviation table (16)
Appendix HK, N, E, J-type thermocouple point of 100 degrees Celsius point differential thermodynamic (18)
Appendix I Thermal EMF and temperature indication deviation measurement uncertainty evaluation example (19)
Introduction
This specification replaces JJG351-1996 "work with inexpensive metal thermocouple" for the calibration of inexpensive metal thermocouples
jobs.
This revision is based on GB/T 16701-2010 "Precious metal, low metal thermocouple wire thermoelectromotive force measurement method"
GB/T 16839.1 "Thermocouple Part 1. Index Table", GB/T 16839.2 "Thermocouple Part 2.
Tolerance ", GB/T 30429-2013" industrial thermocouple "and other national standards and JJF 1007-2007" thermometer name
Term and definition of terms, "JJF 1071-2010" National Metrology Calibration Rules "as the basis for the preparation of JJG351-
1996 revised. This specification compared with JJG351-1996, in addition to editorial changes, the main changes are as follows.
--- Increase the introduction part;
--- Added terminology section;
--- Increased reference part of the document;
--- Alchemy metal thermocouple calibration temperature range and length have changed;
--- Constant temperature equipment technical requirements have changed;
--- Increased compensation wire technical requirements;
--- Remove the new thermocouple calibration before annealing;
--- Increased standard platinum resistance thermometer as a measurement standard calculation formula;
--- Replaced by the original procedures in the calculation of examples;
--- Change the standard platinum and rhodium 10-platinum thermocouple in more than 300 ℃ range, the whole 100 degrees Celsius thermoelectromotive force and
Temperature table calculation method;
--- Added thermocouple compensation wire calibration method;
--- Remove the tube furnace temperature field test methods and thermocouples indexing table;
--- Appendices increased thermal EMF and temperature indication deviation calibration uncertainty evaluation example.
The previous version of this specification is released.
--- JJG351-1996;
--- JJG351-1984;
--- JJG141-1973.
Low metal thermocouple calibration specification
1 Scope
This standard applies to the measurement range -40 ℃ ~ 1200 ℃, the length of not less than 500mm, removable nickel-chromium-nickel
Silicon (K), Nickel Chromium - Nickel Silicon Magnesium (N), Nickel Chromium - Copper Nickel (E), Iron - Copper Nickel (J)
Dual (hereinafter referred to school thermocouple) calibration.
2 reference documents
This specification cites the following documents.
Temperature measurement terminology and definitions
Compensating lead for thermocouple GB/T 4989-2013
Precious metal, bimetallic thermocouple wire - Measurement method of thermoelectromotive force GB/T 16701-2010
GB/T 16839.1 Thermocouples Part 1. Index table
GB/T 16839.2 Thermocouples Part 2. Tolerances
Industrial thermocouples
For dated references, only the dated version applies to this specification; for undated references
The latest version (including all amendments) applies to this specification.
3 Terms
JJF 1007-2007 defined and the following terms and definitions apply to this specification.
3.1 compensation wire extensionorcompensatingcables
A pair with the thermocouple was assigned with the wire. If it is used with the correct calibration of the thermocouple, it put the school was heat
The reference of the galvanic couple moves to the output of the pair of conductors.
4 Overview
A thermocouple is a thermometer made of Seebeck effect on two conductors of different materials. Usually two different materials
The conductors are called the two electrodes of a thermocouple and one of their two electrodes is welded together to form a measuring terminal.
Placed in the measured temperature field; the other end of the reference end, measured at a constant temperature field.
5 measurement characteristics
5.1 thermocouple thermocouple and temperature indication deviation
The thermo-electromotive force of a thermocouple characterizes its thermoelectric properties. When thermocouple reference junction is 0 ℃, the thermoelectromotive force and temperature
The relationship should be consistent with GB/T 16839.1.
In a certain temperature range, the measured thermocouple temperature deviation in line with Table 1 requirements.
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