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JJF 1223-2009 English PDF

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Q: Should I purchase the latest version JJF 1223-2009?

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US$439.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1223-2009: Calibration Specification for Standing Wave Tubes(Method Using Standing Wave Ratio)
Status: Valid

JJF 1223: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1223-2009	439	Add to Cart	4 days	Calibration Specification for Standing Wave Tubes(Method Using Standing Wave Ratio)	Valid
JJF 1223-1990	279	Add to Cart	3 days	O.T.N.for Pressure Primary Standard in the Range from 0.1 to 10MPa	Obsolete

Similar standards

GB/T 3222.2 GB/T 3222.1 JJG 188 JJF 2012 JJF 1228 JJF 1216

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)

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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1223-2009_English be delivered?

Answer: Upon your order, we will start to translate JJF 1223-2009_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1223-2009_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1223-2009_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJF 1223-2009?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJF 1223-2009 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.