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JJF 2033-2023 English PDF

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JJF 2033-2023: Calibration Specification for Orifice Flowmeters
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JJF 2033-2023English469 Add to Cart 5 days [Need to translate] Calibration Specification for Orifice Flowmeters Valid JJF 2033-2023

Standard similar to JJF 2033-2023

JJF 1033   JJF 1050   JJF 1030   

Basic data

Standard ID JJF 2033-2023 (JJF2033-2023)
Description (Translated English) Calibration Specification for Orifice Flowmeters
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 21,259
Date of Issue 2023-03-15
Date of Implementation 2023-09-15
Issuing agency(ies) State Administration for Market Regulation

JJF 2033-2023: Calibration Specification for Orifice Flowmeters

---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 JJF 2033-2023 Calibration Specifications for Orifice Flow Meters Released on 2023-03-15 2023-09-15 Implementation Released by the State Administration for Market Regulation Calibration Specifications for Orifice Flow Meters Responsible Unit: National Flow Measurement Technical Committee Main drafting unit: Hubei Institute of Metrology and Testing Technology China Institute of Metrology Hebei Institute of Metrology Supervision and Testing Participating in the drafting unit: Qingdao Laoying Environmental Technology Co:, Ltd: Wuhan Tianhong Instrument Co:, Ltd: This specification entrusts the National Flow Measurement Technical Committee to be responsible for interpretation The main drafters of this specification: Wanlifen (Hubei Provincial Institute of Metrology and Testing Technology) Gao Feng (National Institute of Metrology) Niu Lina (Hebei Institute of Metrology Supervision and Testing) Participating drafters: Guan Yu (Qingdao Laoying Environmental Technology Co:, Ltd:) Fan Xinfeng (Wuhan Tianhong Instrument Co:, Ltd:) Yin Yanzhen (Hubei Institute of Metrology and Testing Technology) Qi Rundong (National Institute of Metrology)

Table of contents

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and Definitions(1) 3:1 Terminology(1) 3:2 Units of measurement(1) 4 Overview(2) 4:1 Working principle(2) 4:2 Composition (2) 4:3 Use(3) 5 Metrological characteristics(3) 5:1 Indication error(3) 5:2 Repeatability(3) 6 Calibration conditions(3) 6:1 Environmental conditions (3) 6:2 Calibration medium(3) 6:3 Measurement standards and supporting equipment (3) 7 Calibration Items and Calibration Methods(4) 7:1 Calibration items(4) 7:2 Calibration method(4) 8 Expression of Calibration Results(7) 9 Recalibration interval(7) Appendix A Orifice Flowmeter Calibration Original Record (8) Appendix B Evaluation of Indication Error Uncertainty (9) Appendix C Uncertainty Assessment of Flow Meter Coefficients (13) Appendix D Calibration Certificate Inside Page Information(15)

Introduction

JJF 1001 "General Metrology Terms and Definitions", JJF 1071-2010 "Rules for Compilation of National Metrology Calibration Standards" Together with JJF 1059:1-2012 "Assessment and Expression of Measurement Uncertainty", it forms the basis to support the formulation of this specification sex file: This specification refers to the international recommendation OIMLR137-1 JJG640-2016 "Differential Pressure Flowmeter", combined with the technical level of my country's orifice flowmeter and the status quo of the industry made: This specification is published for the first time: Calibration Specifications for Orifice Flow Meters

1 Scope

This specification applies to the calibration of orifice flowmeters (hereinafter referred to as flowmeters):

2 References

This specification references the following documents: JJG640-2016 Differential pressure flowmeter JJF 1001 General Metrology Terms and Definitions JJF 1004 Flow Measurement Terms and Definitions JJF 1059:1-2012 Evaluation and Expression of Measurement Uncertainty GB/T 2624:1-2006 Measuring full pipe fluid flow with a differential pressure device installed in a circular cross-section pipe Part 1: General principles and requirements GB/T 2624:2-2006 Measuring full pipe fluid flow with a differential pressure device installed in a circular cross-section pipe Part 2: Orifice plate HJ93-2013 Technical requirements and detection methods for ambient air particulate matter (PM10 and PM2:5) samplers HJ/T 368-2007 Technical requirements and testing methods for orifice flowmeters used to calibrate total suspended particulate matter samplers HJ/T 374-2007 Technical requirements and testing methods for total suspended particulate matter sampler OIMLR137-1 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 and Definitions

3:1 Terminology The following terms and definitions defined in JJF 1001 and JJF 1004 are applicable to this specification: 3:1:1 differential pressure The pressure difference before and after the gas passes through the orifice: 3:1:2 orifice flowmeter orificeflowmeters A gas flow that uses the orifice as a throttling member to determine the volumetric flow rate by the difference between the atmospheric pressure and the pressure at the pressure tapping hole meter: 3:1:3 Flowmeter coefficient meterfactor Related to flow measurement, it is a coefficient set to correct the measurement error of the instrument: 3:2 Units of measurement 3:2:1 Volume unit: liter, symbol L, or cubic meter, symbol m3: 3:2:2 Flow unit: liter per minute, symbol L/min, or cubic meter per minute, symbol m3/min; or cubic meter Meter per hour, symbol m3/h:

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