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JJF 1379-2012: Calibration Specification of Thermistor Thermometers
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| JJF 1379-2012 | English | 459 |
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Calibration Specification of Thermistor Thermometers
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JJF 1379-2012
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Basic data | Standard ID | JJF 1379-2012 (JJF1379-2012) | | Description (Translated English) | Calibration Specification of Thermistor Thermometers | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A54 | | Classification of International Standard | 17.120 | | Word Count Estimation | 20,252 | | Older Standard (superseded by this standard) | JJG 363-1984; JJG 367-1984 | | Regulation (derived from) | AQSIQ Announcement No. 206 of 2012 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | | Summary | This standard applies to measurement range (-50 ~ +200)��C, the sensor is a thermistor thermometer calibration. | JJF 1379-2012: Calibration Specification of Thermistor Thermometers---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.
Calibration Specification of Thermistor Thermometers
People's Republic of China National Metrology Technical Specifications
Thermistor thermometer calibration specification
Issued on. 2012-12-12
2013-06-12 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Thermistor thermometer calibration specification
Thermometers
Instead of JJG363-1984
JJG367-1984
Focal point. the National Technical Committee of temperature measurement
Main drafting unit. Hebei Institute of Metrology
Hebei Academy of Supervision and Testing
China Shipbuilding Industry Corporation, Institute of the seventh eighteen
Participated in the drafting unit. Sensing Branch of Xinjiang limited liability company
Gaobeidian City WAC Electronic Factory
This specification commissioned the National Technical Committee is responsible for interpretation of temperature measurement
The main drafters of this specification.
Kangzhi Ru (Hebei Science Institute of Measurement)
Gengrong Qin (Hebei Supervision and Testing Institute)
Jin Chen (China Shipbuilding Industry Corporation, Institute of the seventh eighteen)
Drafters participate.
Chen Su (Hebei Supervision and Testing Institute)
Guo Qiang (Hebei Science Institute of Measurement)
David Wang (Xinjiang Branch sensing limited liability company)
Gao Qing (the Gaobeidian City, Georgia Electronic Factory)
table of Contents
Introduction (Ⅲ)
1 Scope (1)
2 Overview (1)
3 Metrological characteristics (1)
3.1 Insulation resistance (1)
3.2 indication error (1)
3.3 Stability (2)
Calibration Condition 4 (2)
4.1 environmental conditions (2)
4.2 Standard device and other ancillary equipment (2)
5 calibration, inspection items and methods (2)
5.1 Calibration, inspection items (2)
5.2 Calibration, inspection method (3)
6 calibration expression (4)
7 Recalibration interval (4)
Appendix A thermistor thermometer calibration record format (5)
Appendix B thermistor thermometer calibration certificate page format (7)
Appendix C thermistor thermometer to check the stability of the method (8)
Appendix D thermistor thermometer measuring indication error in a sample Evaluation of Uncertainty (9)
Appendix E thermistor thermometer measuring indication error Evaluation of Uncertainty Example Two (12)
Introduction
Based JJF 1071-2010 "National Calibration Specifications writing rules", JJF 1059-1999 "Measurement Uncertainty
Evaluation and Expression "and JJF 1001-2011" common measurement terms and definitions ", prepared a draft" thermistor thermometer school
Standard Specification. "
This specification replaces JJG367-1984 "grain temperature thermistor meter" and JJG363-1984 "semiconductor point thermometer."
JJG367-1984 "thermistor food thermometer" by the National Measurement Bureau December 13, 1984 approved, in 1985
October 1 implementation. JJG363-1984 "semiconductor point thermometer" by the National Measurement Bureau in December 7, 1984 approved
From December 1, 1985 into effect. Since the implementation of two regulations, it has not been revised.
The main technical specification changes are as follows.
--- Specification covers all levels of precision thermistor thermometer calibration;
--- Increased measurement uncertainty evaluation sample;
--- Introduction of stability inspection method in Appendix C;
--- Remove the sensor allows the provisions of errors.
Thermistor thermometer calibration specification
1 Scope
This standard applies to the measurement range (-50 ~ 200) ℃, the sensor is a thermistor thermometer (hereinafter referred to as
Thermometer) calibration.
2 Overview
Thermometer thermistor sensor and indicator composition. Its working principle is to use the thermistor resistance with temperature
Variation and change characteristics of temperature measurement. It features fast response, low temperature sensing element, measured in the narrow zone
The amount of accuracy.
3 Metrological characteristics
3.1 Insulation resistance
At ambient temperature of 15 ℃ ~ 35 ℃, relative humidity of 45% to 75%, each end of the thermometer display instrument
Between the child, the insulation resistance between the sensor lead and its housing shall not be less than the requirements of Table 1.
Table 1 Insulation resistance Technical Requirements
No. Test Point
Insulation resistance
MΩ
1 power supply - or housing 40
2 input terminals - or casing 20
3 input terminals - Power terminals 40
4 wire sensor - the sensor housing 20
3.2 Indication error
Thermometer indication error following two representations.
3.2.1 directly measured value representation see equation (1).
Δ = ± K (1)
Where.
Δ --- Allow indication error, ℃;
K --- indication error allowable limit, ℃.
3.2.2 in order to quantify the range and units and the measured values relating to representation see equation (2).
Δ = ± (a% FS bd) (2)
Where.
Δ --- Allow indication error, ℃;
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