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JJF 2019-2022: Measurement Specification for Temperature Performance of Liquid Constant Temperature Testing Equipment
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Measurement Specification for Temperature Performance of Liquid Constant Temperature Testing Equipment
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JJF 2019-2022
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Basic data | Standard ID | JJF 2019-2022 (JJF2019-2022) | | Description (Translated English) | Measurement Specification for Temperature Performance of Liquid Constant Temperature Testing Equipment | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A54 | | Word Count Estimation | 21,283 | | Date of Issue | 2022-12-27 | | Date of Implementation | 2023-06-27 | | Issuing agency(ies) | State Administration for Market Regulation | JJF 2019-2022: Measurement Specification for Temperature Performance of Liquid Constant Temperature Testing Equipment
---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.
National Metrology Technical Specifications of the People's Republic of China
Specification for temperature performance test of liquid constant temperature test equipment
Released on 2022-12-27
2023-06-27 Implementation
Released by the State Administration for Market Regulation
Specification for temperature performance test of liquid constant temperature test equipment
Responsible Unit. National Temperature Measurement Technical Committee
Main drafting unit. Tianjin Academy of Metrology Supervision and Testing Science
Luoyang Quality and Technology Supervision, Inspection and Testing Center
Participating in the drafting unit. China Institute of Metrology
Fujian Institute of Metrology
Taian Panran Measurement and Control Technology Co., Ltd.
This specification entrusts the National Temperature Measurement Technical Committee to be responsible for interpretation
The main drafters of this specification.
Sun Hao (Tianjin Metrology Supervision and Testing Research Institute)
Jiang Jing (Tianjin Academy of Metrology Supervision and Testing)
Wang Ling (Luoyang Quality and Technology Supervision, Inspection and Testing Center)
Participating drafters.
Jin Zhijun (National Institute of Metrology)
Tian Yun (Tianjin Metrology Supervision and Testing Research Institute)
Lin Jun (Fujian Institute of Metrology)
Xu Zhenzhen (Taian Panran Measurement and Control Technology Co., Ltd.)
Table of contents
Introduction (Ⅱ)
1 Scope(1)
2 References(1)
3 terms(1)
4 Overview(1)
5 Metrological characteristics(2)
5.1 Temperature performance(2)
5.2 Safety performance (2)
6 Test conditions(2)
6.1 Environmental conditions (2)
6.2 Measuring standards and other equipment(2)
7 Test items and test methods (3)
7.1 Test and inspection items (3)
7.2 Inspection of insulation resistance (3)
7.3 Test method(3)
7.4 Data processing (4)
8 Test result expression(5)
9 Retest interval(6)
Appendix A Reference Format of Original Records for Temperature Performance Test of Liquid Constant Temperature Test Equipment (7)
Appendix B Reference format of the inner page of the test certificate (report) for liquid constant temperature test equipment (9)
Appendix C Example of Evaluation of Temperature Deviation Uncertainty of Liquid Constant Temperature Test Equipment (10)
Appendix D Example of Evaluation of Uncertainty in Temperature Uniformity of Liquid Constant Temperature Test Equipment (12)
Appendix E Example of Evaluation of Uncertainty in Temperature Fluctuation of Liquid Constant Temperature Test Equipment (14)
Introduction
JJF 1071-2010 "Rules for Writing National Metrology Calibration Standards" and JJF 1059.1-2012 "Uncertainty in Measurement"
Degree Assessment and Representation together constitute a basic series of specifications supporting the formulation and revision of this specification.
This specification is published for the first time.
Specification for temperature performance test of liquid constant temperature test equipment
1 Scope
This specification applies to the temperature performance test of liquid constant temperature test equipment with a temperature range of (-80~300) °C.
The temperature performance of other similar equipment can also be tested with reference to this specification.
2 References
This specification references the following documents.
GB/T 5170.1-2016 Inspection methods for environmental test equipment for electrical and electronic products Part 1.General principles
GB/T 5170.2-2017 Test methods for environmental test equipment Part 2.Temperature test equipment
GB/T 26808-2011 Constant temperature bath and constant temperature circulation device Low temperature constant temperature bath
GB/T 28850-2012 Constant temperature bath and constant temperature circulation device High temperature constant temperature bath
For dated references, only the dated version applies to this specification; for undated references
document, its latest version (including all amendments) applies to this specification.
3 terms
3.1 working space working space
The space in the liquid constant temperature test equipment that can maintain the temperature performance within the specified requirements.
3.2 temperature deviation temperaturedeviation
When the liquid constant temperature test equipment is in a stable state, the maximum temperature measured at each measurement point in the working space within the specified time
And the deviation of the minimum temperature from the set temperature. The two deviations are called the upper temperature deviation and the lower temperature deviation.
The liquid constant temperature test equipment is in a steady state, the maximum temperature and the minimum temperature of each measurement point in a certain instantaneous working space
The average of the differences in temperature.
The liquid constant temperature test equipment is in a steady state, and the temperature change of each measurement point in the working space within a specified time interval
the maximum value.
4 Overview
Liquid constant temperature test equipment (hereinafter referred to as equipment), generally consists of a tank, a heating and/or refrigerator and a temperature control system
It consists of three parts. Its working principle is. set the device to a specified temperature value, and the temperature sensor will feel the working medium
The temperature is converted into an analog electrical signal, and after being processed by the control circuit, it is compared with the set temperature and outputs a control signal.
The heating and/or cooling energy of the electric heater and/or refrigerator is used to keep the working medium in the tank at a constant temperature. tank of equipment
It is generally a cuboid or cylinder, and the working medium used by the equipment includes water, ethanol, silicone oil, antifreeze, etc.
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