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JJF 1223-2009 English PDF

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JJF 1223-2009: Calibration Specification for Standing Wave Tubes(Method Using Standing Wave Ratio)
Status: Valid

JJF 1223: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJF 1223-2009English439 Add to Cart 4 days [Need to translate] Calibration Specification for Standing Wave Tubes(Method Using Standing Wave Ratio) Valid JJF 1223-2009
JJF 1223-1990English279 Add to Cart 3 days [Need to translate] O.T.N.for Pressure Primary Standard in the Range from 0.1 to 10MPa Obsolete JJF 1223-1990

PDF similar to JJF 1223-2009


Standard similar to JJF 1223-2009

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Basic data

Standard ID JJF 1223-2009 (JJF1223-2009)
Description (Translated English) Calibration Specification for Standing Wave Tubes(Method Using Standing Wave Ratio)
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Classification of International Standard 17.140
Word Count Estimation 19,157
Date of Issue 2009-07-10
Date of Implementation 2009-10-10
Quoted Standard GB 3102.5-1993; GB 3102.7-1993; GB/T 18696.1-2004; JJF 1001-1998; JJF 1034-2005; JJF 1059-1999
Regulation (derived from) ?AQSIQ Announcement 2009 No.78;
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to using standing wave ratio method for measuring surface acoustic impedance and absorption coefficient acoustic impedance tube calibration.

JJF 1223-2009: Calibration Specification for Standing Wave Tubes(Method Using Standing Wave Ratio)


---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.
Calibration Specification for Standing Wave Tubes (Method Using Standing Wave Ratio) People's Republic of China National Metrology Technical Specifications Wave tube calibration specifications (Standing wave ratio method) Posted 2009-07-10 2009-10-10 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Wave tube calibration specifications (Standing wave ratio method) This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on July 10, 2009, and from From October 10, 2009 into effect. Focal point. the National Committee of the acoustic measurement technology Main drafting unit. Hubei Provincial Institute of Measurement and Testing Participated in the drafting. Hangzhou Aihua Instrument Co., Ltd. SOUTH Metrology This specification by the responsible National Technical Committee acoustic measurement interpretation The main drafters of this specification. Yao Qiuping (Hubei Institute of Measurement and Testing) Chen Yanming (Hubei Institute of Measurement and Testing) Chen Xiang (Hubei Institute of Measurement and Testing) Drafters participate. Xiong Wenbo (Hangzhou Aihua Instrument Co., Ltd.) Wang Qi (SOUTH Metrology) Zhao Sihai (SOUTH Metrology) Zhou Qin (SOUTH Metrology)

table of Contents

1 Scope (1) 2. Referenced Documents (1) 3 terminology and units of measurement (1) 4 Overview (1) 5 Metrological characteristics (2) 5.1 sound source sound pressure stability (2) 5.2 Total harmonic distortion of the sound source (2) 5.3 grade linear probe microphone (2) 5.4 Impedance Tube attenuation (2) 5.5 VSWR impedance tube (2) 5.6 Wave Tube measuring range limit (2) 5.7 Structure probe microphone sound transmission properties (2) Calibration Condition 6 (2) 6.1 environmental conditions (2) 6.2 standards and other measuring equipment and laboratory environmental requirements (2) 7 calibration items and calibration methods (3) 7.1 calibration items (3) 7.2 Calibration method (3) 8 calibration results expression (6) 8.1 Calibration Data Processing (6) 8.2 calibration certificate (6) 8.3 calibration measurement uncertainty (6) 9 Recalibration interval (6) Appendix A calibration certificate (7) Examples Appendix B Evaluation of Measurement Uncertainty (10) Wave tube calibration specifications (Standing wave ratio method)

1 Scope

This standard applies to stationary wave ratio method for measuring surface acoustic impedance and absorption coefficient of acoustic impedance tube calibration.

2 Citations

This specification references the following documents Quantities and units GB/T 3102.5-1993 electricity and magnetism GB/T 3102.7-1993 Quantities and units of acoustics GB/T 18696.1-2004 acoustic impedance tube sound absorption coefficient and impedance measurement - Part 1. standing Ratio method JJF 1001-1998 common measurement terms and definitions JJF 1034-2005 acoustic measurement terminology and definitions JJF 1059-1999 Evaluation and Expression of Uncertainty in Measurement When using this specification it should be noted that using the currently valid version of the documents cited.

3 terminology and units of measurement

This specification uses terminology and definitions relating to the JJF 1001-1998 and JJF 1034-2005. This specification uses GB/T 3102.5-1993 and GB/T 3102.7-1993 Quantities and units as specified. Figure 3.1 VSWR (standingwavepattern) To measure the standing wave tube specimen surface as a reference surface, wave tube probe microphone distance traveled from the reference plane is a cross-sit Standard, probe microphone output sound pressure for the vertical axis, the distance from the reference plane to draw sound pressure Pictured standing in Fig. 3.2 VSWR (S) (standingwaveratio) No standing on the attenuation map, the sound pressure amplitude maximum value | minimum amplitude of the sound pressure values | | Pmax Pmin | ratio. S = | Pmax |/| Pmin | (1) 3.3 meter attenuation and VSWR (Sn) (standingwaveratiowithattenuation) The standing wave attenuation map, the sound pressure amplitude of the n-th sound pressure at the maximum value | P (max, n) | n th sound pressure minimum Pressure amplitude value at | P (min, n) | ratio. Sn = | P (max, n) |/| P (min, n) | (2) Apparent, n is not the same, Sn different values.

4 Overview

SWR standing wave tube is measured under normal incidence sound absorption coefficient of acoustic material conditions, and surface acoustic reflection factor Impedance ratio or acoustic impedance tube surface acoustic admittance rate, it is mainly by the impedance tube, specimen tube, the sound source, the probe microphone, standard Composition feet and other parts.

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