JJG 326-2021 English PDFUS$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. JJG 326-2021: (Verification Regulation of Speed - Standard Device) Status: Valid JJG 326: Historical versions
Basic dataStandard ID: JJG 326-2021 (JJG326-2021)Description (Translated English): (Verification Regulation of Speed - Standard Device) Sector / Industry: Metrology & Measurement Industry Standard Classification of Chinese Standard: A53 Word Count Estimation: 13,154 Issuing agency(ies): State Administration for Market Regulation JJG 326-2021: (Verification Regulation of Speed - Standard Device)---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 Speed Standard Device) People's Republic of China National Metrological Verification Regulations Speed standard device Published on 2021-07-28 2022-01-28 Implementation Released by the State Administration for Market Regulation Verification Regulations for Speed Standard Devices Replacing JJG 326-2006 Focal Point. National Technical Committee of Vibration and Shock Speed Measurement Main drafting unit. China Institute of Metrology Participating in the drafting unit. Beijing Institute of Metrology and Testing Sciences Jiangxi Institute of Metrology and Testing Shanxi Institute of Metrology Zhejiang Institute of Metrology Fujian Institute of Metrology This regulation entrusts the National Technical Committee of Vibration and Shock Speed Measurement to be responsible for the interpretation The main drafters of this regulation. Sun Qiao (China Institute of Metrology) Bai Jie (China Institute of Metrology) Participating drafters. Yu Baoliang (Beijing Institute of Metrology and Testing) Yang Qiqi (Jiangxi Institute of Metrology and Testing) Bai Min (Shanxi Institute of Metrology) Yu Xingyan (Zhejiang Institute of Metrology) Ma Xing (Fujian Institute of Metrology) contentIntroduction (Ⅱ) 1 Scope(1) 2 References (1) 3 Terms (1) 4 Overview(1) 5 Measurement performance requirements(1) 6 General technical requirements (1) 6.1 Appearance requirements (1) 6.2 Other technical requirements (2) 7 Measuring Instrument Control(2) 7.1 Verification Conditions (2) 7.2 Verification items (2) 7.3 Verification method (3) 7.4 Processing of Verification Results (4) 7.5 Verification Period(5) Appendix A Recommended Format for Verification Records (6) Appendix B Verification Certificate Inner Page Format (7) Appendix C Format of Inner Page of Verification Result Notice (8)IntroductionThis regulation is in accordance with JJF1002-2010 "National Metrological Verification Regulations Compilation Rules", JJF1001-2011 "General Measurement Terms and Definitions", JJF1094-2002 "Characteristic Evaluation of Measuring Instruments", etc., combined with my country's current speed standards According to the actual use of the standard device, the revision of JJG 326-2006 is a technology to realize the effective traceability of the speed value. Guarantee. Compared with JJG 326-2006, the main technical changes of this regulation are as follows, except for editorial changes. --- Added the introduction, reference documents, terminology section; --- Adjusted the overview, increased the type of speed source and the type of control system; --- Adjusted the speed measurement range; --- Adjusted the classification of the speed standard device, adding 0.0005 level, not retaining 0.1 level; --- Deleted the requirements for 2h rotational speed stability, power-on frequency accuracy, and acoustic noise in the metering performance requirements; --- Deleted the verification requirements for the reversibility of the rotational speed and the vibration level in the verification project; --- Adjusted the general technical requirements; --- Adjusted the content of measuring instrument control; --- Clarified the processing of the verification results; --- Adjusted the appendix. The previous versions of this regulation have been released as follows. ---JJG 326-2006; ---JJG 326-1983. Verification Regulations for Speed Standard Devices1 ScopeThis regulation is applicable to 0.0005, 0.001, 0.0005, 0.001, The initial verification, subsequent verification and in-use inspection of the 0.005 and 0.01 grade speed standard devices.2 Reference documentsThis procedure cites the following documents. JJG 1134-2017 Speed measuring instrument For dated citations, only the dated version applies to this Regulation; for undated citations The latest version (including all amendments) applies to this regulation.3 TerminologyA metering device capable of providing high-accuracy rotational speed output over a wide range.4 OverviewThe speed standard device is mainly used for the verification and calibration of various tachometers, speed sensors and speed measuring instruments. it pass It is often composed of speed source, gearbox, control system and auxiliary equipment. The speed source usually adopts DC servo motor, step Feed motor or hollow cup motor; gearbox usually adopts gearbox or other variable speed equipment; control system adopts closed loop Control or open-loop control, used to ensure the accuracy and stability of the standard speed output.5 Metrology performance requirementsThe metering performance requirements of the speed standard device are shown in Table 1. Table 1 Measurement performance index of speed standard device serial number item Performance Level 0.0005 Level 0.001 Level 0.005 Level 0.01 1 Minimum measuring range (30~30000)r/min 2 Uncertainty of rotational speed measurement (k=3) 5×10-6 1×10-5 5×10-5 1×10-4 3 Speed stability 5×10-6 1×10-5 5×10-5 1×10-4 4 4h time base frequency stability 1×10-6 2×10-6 1×10-5 2×10-5 ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JJG 326-2021_English be delivered?Answer: Upon your order, we will start to translate JJG 326-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of JJG 326-2021_English with my colleagues?Answer: Yes. 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Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 326-2021 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. |