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JJG 431-2014: Verification Regulation of Portable 3-cup Anemometers
Status: Valid JJG 431: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJG 431-2014 | English | 459 |
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4 days [Need to translate]
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Verification Regulation of Portable 3-cup Anemometers
| Valid |
JJG 431-2014
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| JJG 431-1986 | English | 559 |
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4 days [Need to translate]
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Verification Regulation of Portable 3-Cup Anemometer Type DEM6
| Obsolete |
JJG 431-1986
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PDF similar to JJG 431-2014
Basic data | Standard ID | JJG 431-2014 (JJG431-2014) | | Description (Translated English) | Verification Regulation of Portable 3-cup Anemometers | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A53 | | Classification of International Standard | 17.100 | | Word Count Estimation | 20,263 | | Date of Issue | 11/17/2014 | | Date of Implementation | 5/17/2015 | | Older Standard (superseded by this standard) | JJG 431-1986 | | Quoted Standard | JJF 1001 | | Regulation (derived from) | The State Administration of Quality Supervision, Inspection and Quarantine Notice 2014 No. 125 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | | Summary | This Standard applies to the measurement limit not exceeding 30 m/s the pointer light wind anemometer cups initial verification and digital light wind anemometer cups of subsequent verification and the use of checks. This Standard does not apply to mining | JJG 431-2014: Verification Regulation of Portable 3-cup 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.
Verification Regulation of Portable 3-cup Anemometers
State verification procedures People's Republic of China
Light wind anemometer cups
Issued on. 2014-11-17
2015-05-17 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Light wind anemometer cups testing procedures
Replacing JJG 431-1986
Focal point. the National Technical Committee of pressure measurement
Main drafting unit. Zhejiang Technical Support Center for Atmospheric Sounding
Hunan Provincial Meteorological Center Technology and Equipment
Participated in the drafting. Jiangsu Provincial Meteorological Observation Center
The measurement procedure commissioned the National Technical Committee is responsible for interpreting pressure
The main drafters of this procedure.
Luo Chang (Zhejiang atmospheric sounding technical support center)
Li Hui (Hunan Provincial Meteorological Center Technology and Equipment)
Ni Yongsheng (Zhejiang atmospheric sounding technical support center)
SOCIETY FOR (Zhejiang atmospheric sounding technical support center)
Drafters participate.
Zhang Zheng (Jiangsu Province meteorological observation center)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2. References (1)
3 terminology and units of measurement (1)
3.1 The term (1)
3.2 units of measurement (1)
4 Overview (1)
5 metering performance requirements (2)
6 General Requirements (2)
6.1 Appearance (2)
6.2 Wind Systems mechanical properties (3)
Winds System 6.3 Mechanical properties (3)
7 control of measuring instruments (3)
7.1 test conditions (3)
7.2 Verification Project (4)
7.3 Verification Methods (4)
7.4 Verification Results Processing (6)
7.5 test cycle (6)
Appendix A standard wind speed calculation method (7)
Appendix B light wind anemometer cups test recording format (8)
Appendix C calibration certificate/test results in the notice page format (9)
Appendix D wind tunnel test section flow field uniformity and stability of the detection method (12)
Introduction
JJF1002 "national verification procedures write rules", JJF1001 "common measurement terms and definitions"
JJF1059.1 "Evaluation and Expression of Uncertainty in Measurement" constitute support this protocol revision of the basic series
specification.
This procedure is in accordance with the provisions of JJF1002-2010 "national verification procedures write rules", and to
JJG 431-1986 "DEM6 type light wind anemometer cups" subject to revisions. Phase version with JJG 431-1986
Ratio, in addition to editorial changes outside the main technical changes are as follows.
--- Change the procedure name, expanding the scope of application (see 1);
--- Metrological requirements only provides indication error requirements (see 5), General Requirements for the increased wind vane
Start wind speed, wind speed cup start request (see 6.2.2,6.3.2);
--- Change the test conditions modified micro-pressure gauge and wind tunnel technical requirements (see 7.1.1);
--- Refine the test methods (see 7.3);
--- Change the formula for calculating wind speed (see Appendix A);
--- Delete data processing linear regression equations and nonlinear error;
--- Changing the test cycle (see 7.5);
--- Deleted Appendix 3, Appendix 4, Appendix 5 and Appendix 6;
--- Added "test certificate/test results within the notice page and Format" appendix (Appendix C);
--- Increasing the wind tunnel uniformity and stability of detection methods (see Appendix D).
The previous versions of this Recommendation published case.
--- JJG 431-1986.
Light wind anemometer cups testing procedures
1 Scope
The order applies to the upper limit of the measurement does not exceed 30m/s of wind anemometer cups lightweight pointer (hereinafter referred to as means
Pin anemometer) and digital light wind anemometer cups (hereinafter referred to as digital anemometer) initial verification, after
Continued use of verification and inspection. This procedure does not apply to mining wind anemometer cups.
2. References
This procedure references the following documents.
JJF1001 common measurement terms and definitions
For dated references, only the dated edition applies to this procedure; undated reference documents
Member, the latest edition (including any amendments) applies to this procedure.
3 terminology and units of measurement
3.1 Terms
3.1.1 Wind Cup start Winds startingwindvelocityofcup
Wind cup start from rest becomes able to rotate continuously, anemometer can change direction or speed display lowest wind speed.
3.1.2 vane start Winds startingwindvelocityofvane
Released by the vane angle of a return to the air flow direction while the minimum wind speed.
3.1.3 blockage ratio blockageratio
Anemometer wind tunnel test section (including the installation of control bracket, anemometer start lever, etc.) with the frontal area test section
Uniform cross-sectional area ratio.
3.2 units of measurement
Light wind anemometer cups used in legal units of measurement in meters per second, symbol m/s.
4 Overview
Light wind anemometer cups (hereinafter referred to as anemometer) is a portable handheld for measuring wind speed and wind direction indication
Instruments, mainly by the wind cup set, wind speed indicating system, wind system and handle other components.
Wind cup set of three wind cups under the influence of the wind rotation, its angular velocity is proportional to wind speed, wind cup by rotation
Mechanical drive or optical sensors, etc. for converting the output value of wind speed. When the wind direction and wind vane to a certain angle,
Wind vane to generate pressure, the pressure torque to the rotary vane until the vane is on to turn the wind stopped
Move, and indicates wind direction.
Different wind speed indicating system, it can be divided into anemometer wind speed value with pointer pointer and digital anemometer
Display wind speed digital anemometer two kinds. Sampling pointer anemometer has a timing mechanism, measuring wind speed control
Room was 1min, 1min value indicating wind speed average wind speed; digital anemometer measured instantaneous wind speed. Common means
Pin anemometer wind speed section shape structure 1a), the digital anemometer wind speed section shape structure shown in FIG.
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