JJG 1194-2023 English PDF

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JJG 1194-2023: Wheel Type Digital Anemometers
Status: Valid

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Basic data

Standard ID: JJG 1194-2023 (JJG1194-2023)
Description (Translated English): Wheel Type Digital Anemometers
Sector / Industry: Metrology & Measurement Industry Standard
Word Count Estimation: 15,111
Date of Issue: 2023-03-15
Date of Implementation: 2023-09-15
Issuing agency(ies): State Administration for Market Regulation

JJG 1194-2023: Wheel Type Digital Anemometers

---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 Verification Regulations of the People's Republic of China JJG 1194-2023 Impeller Digital Anemometer Released on 2023-03-15 2023-09-15 Implementation Released by the State Administration for Market Regulation Calibration rules for impeller digital anemometer Responsible unit: National Meteorological Measuring Instruments Measuring Technical Committee Main drafting unit: Fujian Institute of Metrology Participating in the drafting unit: Shanghai Meteorological Information and Technical Support Center Shanghai Institute of Metrology and Testing Technology This regulation is entrusted to the National Meteorological Measuring Instrument Metrology Technical Committee to be responsible for interpretation The main drafters of this regulation: Lin Jingxing (Fujian Institute of Metrology) Wang Kongxiang (Fujian Institute of Metrology) Jiang Libin (Fujian Institute of Metrology) Participating drafters: Chen Qihuan (Shanghai Meteorological Information and Technical Support Center) Peng Hui (Shanghai Meteorological Information and Technical Support Center) Wei Min (Shanghai Meteorological Information and Technical Support Center) Yang Weihao (Shanghai Institute of Metrology and Testing Technology)

Table of contents

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and units of measurement(1) 3:1 Terminology(1) 3:2 Units of measurement(1) 4 Overview(1) 5 Metrological performance requirements (2) 5:1 Measuring range and maximum allowable error(2) 5:2 Starting wind speed(2) 6 General technical requirements (2) 6:1 Appearance(2) 6:2 Function(2) 7 Measuring Instrument Control(2) 7:1 Test conditions (2) 7:2 Verification items (3) 7:3 Verification method (3) 7:4 Processing of verification results (4) 7:5 Verification period(4) Appendix A Calculation of standard wind speed values (5) Appendix B Format of the inner page of the verification certificate/test result notification (6) Appendix C Verification record format example of impeller digital anemometer (9)

Introduction

JJF1002-2010 "Rules for Compilation of National Metrology Verification Regulations", JJF1001-2011 "General Metrology Terminology and Definition" and JJF1059:1-2012 "Assessment and Expression of Measurement Uncertainty" together constitute the basis for the formulation of this regulation Basic series of specifications: This regulation mainly refers to JJG 431-2014 "Portable Three-Cup Wind Direction Anemometer" and GB/T 18204:1-2013 "Public place sanitation inspection methods Part 1: Physical factors" was compiled: This regulation is published for the first time: Calibration rules for impeller digital anemometer

1 Scope

This regulation is applicable to the initial verification and follow-up verification of the impeller digital anemometer with a measurement range of (2~40)m/s: Set and check in use:

2 References

This procedure references the following documents: JJG 431-2014 Portable three-cup wind direction anemometer GB/T 18204:1-2013 Hygiene inspection methods for public places Part 1: Physical factors For dated references, only the dated version applies to this regulation; for undated references, Its latest version (including all modifications) applies to this regulation:

3 Terminology and units of measurement

3:1 Terminology A wind speed measuring instrument using an impeller as a (wind speed) sensor: The minimum wind speed at which the anemometer impeller can maintain continuous rotation and the anemometer can output a signal from stationary state: 3:1:3 Blocking ratio blockageratio The ratio of the windward area of the anemometer (including the mounting bracket) in the wind tunnel test section to the cross-sectional area of the test section: In the steady state of the wind tunnel flow field, the arithmetic mean value of the difference between the measured maximum wind speed and the minimum wind speed in the test section, Expressed in relative value: 3:1:5 Wind speed stability stabilityofwindspeed In the steady state of the wind tunnel flow field, half of the difference between the highest wind speed and the lowest wind speed at the center point measured in the test section, Expressed in relative value: 3:2 Units of measurement 3:2:1 Unit of wind speed: meter per second, symbol is m/s: 3:2:2 Pressure unit: Pascal, symbol Pa: 3:2:3 Temperature unit: Celsius, the symbol is ℃:

4 Overview

The impeller-type digital anemometer (hereinafter referred to as anemometer) generally consists of an impeller-type anemometer, a digital display instrument, etc: composition: The anemometer is mainly used to measure the instantaneous or average flow velocity of the air, and output (display) the wind velocity in digital form Value air velocity measuring instrument (including the air velocity measuring unit satisfying the above form in the comprehensive instrument): ......

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