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JJF 2012-2022: Program of Pattern Evaluation of Ultrasonic Gas Meters
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Program of Pattern Evaluation of Ultrasonic Gas Meters
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JJF 2012-2022
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Basic data | Standard ID | JJF 2012-2022 (JJF2012-2022) | | Description (Translated English) | Program of Pattern Evaluation of Ultrasonic Gas Meters | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A59 | | Word Count Estimation | 53,515 | | Date of Issue | 2022-12-27 | | Date of Implementation | 2023-06-27 | | Issuing agency(ies) | State Administration for Market Regulation | JJF 2012-2022: Program of Pattern Evaluation of Ultrasonic Gas Meters---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
Ultrasonic gas meter type evaluation outline
Released on 2022-12-27
2023-06-27 Implementation
Released by the State Administration for Market Regulation
Ultrasonic gas meter type evaluation outline
Ultrasonic Gas Meters
Responsible Unit. National Flow Measurement Technical Committee
Main drafting unit. Beijing Institute of Metrology and Testing Sciences
Zhejiang Institute of Metrology
Chongqing Institute of Metrology and Quality Inspection
Participating in the drafting unit. Gold Card Smart Group Co., Ltd.
Shuifa Hangyu Star IoT Technology (Liaoning) Co., Ltd.
Chengdu Qianjia Technology Co., Ltd.
Rongcheng Yuxiang Industrial Co., Ltd.
Zhejiang Chint Instrument Co., Ltd.
This specification entrusts the National Flow Measurement Technical Committee to be responsible for interpretation
The main drafters of this specification.
Yang Youtao (Beijing Institute of Metrology and Testing Sciences)
Jin Lan (Zhejiang Institute of Metrology)
Xia Jie (Chongqing Institute of Metrology and Quality Inspection)
Participating drafters.
Guo Gang (Goldcard Smart Group Co., Ltd.)
Cheng Bo [Shuifa Hangyu Star IoT Technology (Liaoning) Co., Ltd.]
Luo Chengbin (Chengdu Qianjia Technology Co., Ltd.)
Zou Ziming (Rongcheng Yuxiang Industrial Co., Ltd.)
Chenzhou (Zhejiang Chint Instrument Co., Ltd.)
Table of contents
Introduction (Ⅲ)
1 Scope(1)
2 References(1)
3 Terms and Definitions(1)
4 Overview(3)
4.1 Principle (3)
4.2 Structure (4)
4.3 Use(4)
4.4 Key components and materials(4)
5 Legal management requirements (5)
5.1 Units of measurement(5)
5.2 Seal(5)
5.3 Signs(5)
6 Measurement Requirements(6)
6.1 Accuracy classes and maximum permissible errors(6)
6.2 Error Curve(7)
6.3 Weighted average error (7)
6.4 Reproducibility(7)
6.5 Repeatability(7)
6.6 Error deviation of different working modes (7)
6.7 Pressure loss(7)
6.8 Flow range(8)
6.9 Resolution(8)
7 General technical requirements (9)
7.1 Appearance and structure (9)
7.2 Functional requirements (9)
7.3 Environmental adaptability (10)
7.4 Power Environment(10)
7.5 Fluid Disturbance(11)
7.6 Explosion-proof performance (11)
7.7 Durability(11)
7.8 Mechanical environment (12)
8 Type evaluation item list (12)
9 Provide the number of prototypes and the usage of the prototypes(14)
10 Method conditions, data processing and eligibility criteria of test items (14)
10.1 Reference conditions (14)
10.2 Metrological performance (14)
10.3 Pressure loss(17)
10.4 Sealing (18)
10.5 Airflow direction(18)
10.6 Zero flow reading(18)
10.7 Temperature adaptability(19)
10.8 Climate and environment (20)
10.9 Electromagnetic environment (immunity) (22)
10.10 Power Environment(24)
10.11 Fluid Disturbance (26)
10.12 Explosion-proof performance (26)
10.13 Durability(26)
10.14 Mechanical environment (27)
11 List of measuring instruments and equipment used in test items (29)
11.1 Standard devices (29)
11.2 Ancillary equipment (29)
Appendix A Type Evaluation Report Reference Format (31)
Appendix B provides the number of prototypes and the usage of the prototypes (45)
Introduction
This outline is in accordance with JJF 1015 "General Specification for Type Evaluation of Measuring Instruments", JJF 1016 "General Specification for Type Evaluation of Measuring Instruments"
Compiled according to the requirements of Guidelines for the Compilation of Price Outline, applicable to the type evaluation test of ultrasonic gas meters.
This outline is based on GB/T 32201-2015 "Gas Flowmeter", OIMLR137-1
meters) as the main technical basis, referring to GB/T 39841 "Household Ultrasonic Gas Meters", JJG1030-2007
"Ultrasonic Flowmeter" and the industry standard JB/T 12958-2016 "Household Ultrasonic Gas Meter", and integrated my country's ultrasonic
The status quo of wave gas meters is formulated.
This outline is published for the first time.
Ultrasonic gas meter type evaluation outline
1 Scope
This outline is applicable to those whose classification code is 12220000, the maximum working pressure does not exceed 50kPa, and the maximum flow rate does not exceed
Type evaluation of ultrasonic gas meters for closed pipelines over 25m3/h with time difference method as the measurement principle.
2 References
JJG1030-2007 Ultrasonic flowmeter
JJF 1001 General Metrology Terms and Definitions
JJF 1004 Flow Measurement Terms and Definitions
JJF 1051 Measuring Instruments Naming and Classification Coding
GB/T 2423.1 Environmental testing for electrical and electronic products - Part 2.Test methods Test A. Low temperature
GB/T 2423.2 Environmental testing for electric and electronic products - Part 2.Test methods Test B. High temperature
GB/T 2423.3 Environmental testing - Part 2.Test methods Test Cab. Constant damp heat test
GB/T 2423.7 Environmental testing - Part 2.Test methods Test Ec. Shock caused by rough handling
(mainly used for equipment samples)
GB/T 2423.56 Environmental testing - Part 2.Test method Test Fh. Broadband random vibration and guidelines
GB/T 17626.2 Electromagnetic Compatibility Test and Measurement Technology Electrostatic Discharge Immunity Test
GB/T 17626.3 Electromagnetic Compatibility Test and Measurement Technology Radio Frequency Electromagnetic Field Radiation Immunity Test
GB/T 17626.4 Electromagnetic Compatibility Test and Measurement Technology Electrical Fast Transient Burst Immunity Test
GB/T 17626.5 Electromagnetic Compatibility Test and Measurement Technology Surge (Shock) Immunity Test
GB 17820 Natural gas
GB/T 32201-2015 gas flowmeter
GB/T 39841-2021 Ultrasonic gas meters
OIMLR137-1
JB/T 12958-2016 Household Ultrasonic Gas Meter
For dated references, only the dated version applies to this syllabus; for undated references,
Its latest version (including all amendments) applies to this outline.
3 Terms and Definitions
The following terms and definitions defined by JJF 1001 and JJF 1004 are applicable to this syllabus.
3.1 maximum flow rate
qmax
The gas meter meets the upper limit flow rate required by the metering performance.
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