JJG 326-2021 English PDF

US$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

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 326-2021	259	Add to Cart	3 days	(Verification Regulation of Speed - Standard Device)	Valid
JJG 326-2006	559	Add to Cart	3 days	Verification regulation of standard equipment for revolution speed	Obsolete
JJG 326-1983	479	Add to Cart	4 days	Verification Regulation of Standard Revolution Speed Equipment	Obsolete

Similar standards

GB/T 36126   JJG 475   GB/T 1885   JJG 159   JJG 166   JJG 126   

Basic data

Standard 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)

content

Introduction (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)

Introduction

This 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 Devices

1 Scope

This 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 documents

This 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 Terminology

A metering device capable of providing high-accuracy rotational speed output over a wide range.

4 Overview

The 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 requirements

The 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 ......

Image     

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. The purchased PDF of JJG 326-2021_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 JJG 326-2021?

Answer: Yes. 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.