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JJG 326: Historical versions
| Std ID | Version | USD | Buy | Deliver [PDF] in | Title (Description) |
| JJG 326-2021 | English | 259 |
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3 days [Need to translate]
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(Verification Regulation of Speed - Standard Device)
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| JJG 326-2006 | English | 559 |
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3 days [Need to translate]
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Verification regulation of standard equipment for revolution speed
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| JJG 326-1983 | English | 479 |
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4 days [Need to translate]
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Verification Regulation of Standard Revolution Speed Equipment
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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 | 13,118 |
| 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
...
