JJG 298-2015 English PDFUS$649.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. JJG 298-2015: Standard Vibrators Status: Valid JJG 298: Historical versions
Basic dataStandard ID: JJG 298-2015 (JJG298-2015)Description (Translated English): Standard Vibrators Sector / Industry: Metrology & Measurement Industry Standard Classification of Chinese Standard: A53 Classification of International Standard: 17.16 Word Count Estimation: 28,298 Date of Issue: 2015-12-07 Date of Implementation: 2016-06-07 Older Standard (superseded by this standard): JJG 298-2005 Quoted Standard: JJG 233; JJF 1156; GB/T 20485.11-2006; GB/T 20485.21-2007; ISO 16063-41-2011 Regulation (derived from): ?AQSIQ 2015 Nian (No.148) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine Summary: This standard applies to the frequency range of 0.1 Hz ~ 20 kHz standard within the vibration table (comparative law or jus cogens) initial verification, subsequent verification and the use of checks. JJG 298-2015: Standard Vibrators---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.Standard Vibrators National Metrological Verification Regulation of the People's Republic of China Standard shaker 2015-12-07 released 2016-06-07 implementation State Administration of Quality Supervision, Inspection and Quarantine issued Standard Shaker Test Procedure Replacing JJG 298-2005 Responsible unit. National vibration impact speed measurement technology committee Drafting unit. China Institute of Metrology This procedure entrusts the National Vibration Impact Speed Measurement Technical Committee to explain The drafters of this Code. CAI Cheng-guang (China Institute of Metrology) Li Jingsheng (China Institute of Metrology) table of ContentsIntroduction (II) 1 Scope (1) 2 References (1) 3 Overview (1) 4 Measurement performance requirements (1) 4.1 Magnetic flux density (1) 4.2 Signal to noise ratio (1) 4.3 Frequency indication error (2) 4.4 Stability (2) 4.5 Acceleration Harmonic Distortion (2) 4.6 lateral vibration ratio (2) 4.7 Measurement system voltage measurement error (2) 4.8 Measurement system voltage ratio measurement error (3) 4.9 Measurement system phase difference measurement error (3) 4.10 Acceleration amplitude control error (3) 4.11 Maximum acceleration amplitude (3) 5 General technical requirements (3) 6 Metering device control (3) 6.1 Test conditions (4) 6.2 Verification Project (5) 6.3 Test method (5) 6.4 Processing of test results (9) 6.5 Test cycle (9) Appendix A Verification Certificate Inside Page Format (10) Appendix B Verification Result Notice Page Format (12) Appendix C Use of test results in comparison of vibration calibration (14) Appendix D Use of test results in absolute vibration calibration (16) Appendix E Test results Measurement uncertainty assessment (17) Appendix F Amplitude uniformity measurement method (22)IntroductionThis procedure is based on the JJF1002-2010 "National Rules for the Preparation of Metrological Verification Rules". This procedure is mainly Metrological performance reference national standard GB/T 20485.11-2006 "Calibration method for vibration and shock sensor Part 11 Min. laser interferometry vibration absolute calibration ", GB/T 20485.21-2007" vibration and shock sensor calibration side Law Part 21. Vibration Comparison Method Calibration "and International Standard ISO 16063-41..2011" Vibration and Shock Sensing Calibration methods - Part 41. Calibration of laser vibration meter (Methodsforthecalibrationof fibrationand shocktransducers-Part 41. Calibrationoflaservibrometers ". This procedure is right JJG 298-2005 "intermediate frequency standard shaking table (comparison method)" was revised. Compared with JJG 298-2005, In addition to editorial changes, the main technical changes in this procedure are as follows. --- the original name "IF standard shaker (comparison method)" to "standard shaking table"; --- suitable for absolute and comparative law standard vibration table; --- frequency range extended to 0.1Hz ~ 20kHz; --- to cancel the original program on the acceleration amplitude limit; --- cancel the original program on the amplitude uniformity requirements; --- increase the part of the standard shaking table measurement system voltage measurement error, voltage ratio measurement error, phase difference measurement Quantity error, acceleration amplitude control error requirement --- part of the measurement performance requirements and verification methods have been adjusted; - Appendix C, D, E, F are informative. The previous versions of this order are released as follows. --- JJG 298-2005; --- JJG 298-1995; --- JJG 298-1982. Standard Shaker Test Procedure1 ScopeThis procedure applies to standard shaking tables (comparative or absolute) in the frequency range 0.1 Hz to 20 kHz The first test, follow-up test and the use of inspection.2 reference fileThis procedure refers to the following documents. JJG 233 piezoelectric accelerometer JQF1156 vibration impact speed measurement terms and definitions Calibration methods for vibration and shock sensors - Part 11. Laser interferometry method GB/T 20485.11-2006. Absolute calibration GB/T 20485.21-2007 Methods for the calibration of vibration and shock sensors - Part 21. Vibration comparison method calibration ISO 16063-41..2011 Methods for calibration of vibration and shock sensors - Part 41. Calibration of laser vibrometer (Methodsforthecalibrationofvibrationandshocktransducers-Part 41. Calibrationof laservibrometers For dated references, only the dated edition applies to this specification; references that are not dated , The latest version (including all modifications) applies to this specification.3 OverviewThe standard shaking table is the standard sine vibration excitation when the vibration sensor and the measuring instrument are tested or calibrated. Set. It is usually composed of a shaking table, a power amplifier (or a driver), a control system (or a signal source, a frequency meter and a voltage Table), control sensors and auxiliary equipment. Shaking tables usually use Lorentz force, reverse piezoelectric effect, hydraulic or Mechanical structure to produce mechanical vibration; control system is usually used with signal generation and acquisition function of the analysis system to achieve, Usually with both sinusoidal vibration control and vibration calibration function.4 Measurement performance requirements4.1 Magnetic flux density The leakage flux density of the sensor mounting position should not be greater than 5 mT. 4.2 Signal to noise ratio The noise ratio of the vibration table acceleration signal shall meet the requirements of Table 1. Table 1 vibration table acceleration signal to noise ratio Calibration method Absolute law comparison method Signal noise ratio ≥ 60dB ≥ 50dB ...... |
