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JJF 2019-2022 English PDF

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US$439.00 · In stock
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JJF 2019-2022: Measurement Specification for Temperature Performance of Liquid Constant Temperature Testing Equipment
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 2019-2022	439	Add to Cart	4 days	Measurement Specification for Temperature Performance of Liquid Constant Temperature Testing Equipment	Valid

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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.)

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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 2019-2022_English be delivered?

Answer: Upon your order, we will start to translate JJF 2019-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 2019-2022_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 2019-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.