HOME   Cart(8)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189759 (19 Oct 2025)

JJF 1490-2014 English PDF

US$739.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1490-2014: CalibrationSpecification for ConstantBandwidth Filters
Status: Valid
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJF 1490-2014English739 Add to Cart 6 days [Need to translate] CalibrationSpecification for ConstantBandwidth Filters Valid JJF 1490-2014

PDF similar to JJF 1490-2014


Standard similar to JJF 1490-2014

GB/T 36103.1   SJ/T 10410   

Basic data

Standard ID JJF 1490-2014 (JJF1490-2014)
Description (Translated English) CalibrationSpecification for ConstantBandwidth Filters
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard L18
Word Count Estimation 32,324
Date of Issue 8/25/2014
Date of Implementation 11/25/2014
Quoted Standard JJF 1001-2011; JJF 1034-2005; GB 3102.5; GB 3102.7; GB/T 3241-2010
Adopted Standard IEC 61260-1, MOD; IEC 61260-3, MOD
Regulation (derived from) People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine Notice 2014 (No. 95); AQSIQ Notice 2014 No. 95
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This Standard applies to analog, and digital data sampling method implementation, the center frequency within the audible frequency range in the calibration constant bandwidth of the filter.

JJF 1490-2014: CalibrationSpecification for ConstantBandwidth Filters

---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.
CalibrationSpecification for ConstantBandwidth Filters People's Republic of China National Metrology Technical Specifications Constant bandwidth filter calibration specification Issued on. 2014-08-25 2014-11-25 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Constant bandwidth filter calibration specification Focal point. the National Committee of the acoustic measurement technology Drafted by. Hengyang Heng Electric Instrument Co., Ltd. Shenzhen Academy of Metrology and Quality Inspection Shaanxi Normal University Institute of Applied Acoustics China Institute of Metrology This specification metering commissioned National Technical Committee is responsible for interpreting acoustics Drafters of this specification. Liu Xiangheng (Hengyang Heng Instrument Electric Co., Ltd.) Zhang Guoqing (Shenzhen Academy of Metrology and Quality Inspection) Sheng-lift (Applied Acoustics Institute, Shaanxi Normal University) He Longbiao (China Institute of Metrology) Jia Li (Shenzhen Academy of Metrology and Quality Inspection) Tan Xiaoming (Hengyang Heng Instrument Electric Co., Ltd.) Niu Feng (China Institute of Metrology)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 terminology and units of measurement (1) 3.1 Terms and definitions (1) 3.2 Quantities and units (2) 4 Overview (2) 5 Metrological characteristics (3) Relative attenuation 5.1 (3) Bandwidth Error 5.2 (3) Centering errors 5.3 (4) Form factor 5.4 (4) 5.5 linearity error (4) 6 calibration conditions (4) Environmental conditions 6.1 (4) 6.2 Measurement standard device and other equipment (4) 6.3 Other requirements (5) 7 calibration items and calibration methods (5) 7.1 calibration items (5) 7.2 Calibration method (5) 8 calibration results expression (12) 8.1 Calibration records (12) 8.2 Calibration data processing (12) 8.3 calibration certificate (12) 8.4 calibration measurement uncertainty (12) 9 Recalibration interval (13) Appendix A calibration record (14) Appendix B calibration certificate (17) Appendix C Measurement Uncertainty Example (21)

Introduction

This specification based JJF 1071-2010 "national measurement calibration specifications write rules" given the rules and format of the series System measurement uncertainty of assessment and according to an JJF 1059.1-2012 requirements. This specification reference to the national standard GB/T 3241-2010 "electro-acoustics octave and fractional octave filters" As well as the international standard IEC 61260-1 "electrical acoustic octave and fractional octave filters - Part 1. Specification" (Electroacoustics-Octave-bandandfractional-octave-bandfilters-Part 1. Specifica- tions) ① and IEC 61260-3 "electrical acoustic octave and fractional octave filters - Part 3. Test Cycle" (Electroacoustics-Octave-band andfractional-octave-bandfilters-Part 3. Periodic tests) ②. This specification is the first release. ① The file is currently FDIS stage. ② The document is currently in the CD phase. Constant bandwidth filter calibration specification

1 Scope

This specification is applicable to analog, and digital data sampling method implementation, the center frequency is constant within the audio range Bandwidth calibration filter. 2. References This specification references the following documents. JJF 1001-2011 common measurement terms and definitions JJF 1034-2005 acoustic measurement terminology and definitions GB 3102.5 Quantities and units of electricity and magnetism GB 3102.7 Quantities and units of acoustics GB/T 3241-2010 electro-acoustics octave and fractional octave filters For dated references, only the dated edition applies to this specification; undated references, The latest version (including any amendments) applies to this specification.

3 terminology and units of measurement

3.1 Terms and Definitions JJF 1001-2011, JJF 1034-2005 and JJF 1059.1-2012 defined and following terms and definitions applicable Used in the present specification. 3.1.1 bandpass filter bandpassfilter Has a single transmission band (or with a small relative attenuation passband) filters, which is greater than the transmission band from Lower frequency zero extends to the upper frequency limited. [GB/T 3241-2010, Definition 3.1]. 3.1.2 constant bandwidth filter constantbandwidthfilter Bandwidth is constant and does not change with the change of the center frequency of the band-pass filter. 3.1.3 Signal level signallevel Time average signal level time-averagedsignallevel Ratio of the number of squares in any frequency, time, party all the provisions of the reference signal with a predetermined value to base 10 10 times. 3.1.4 filter attenuation filterattenuation The difference between the input signal level and the output signal corresponding to the stage at any frequency, the filter. 3.1.5 reference attenuate referenceattenuation To determine the relative attenuation, while the nominal passband filter all of the provisions within the attenuation. 3.1.6 relative attenuation relativeattenuation Reference filter attenuation and the attenuation difference.

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1490-2014_English be delivered?

Answer: Upon your order, we will start to translate JJF 1490-2014_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1490-2014_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1490-2014_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 [email protected]. 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.