JJG 21-2010 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 21-2010	RFQ	ASK	3 days	Tobacco. Verification Regulation of Atmosphere Condition for Laboratory
JJG 21-2008	579	Add to Cart	5 days	Verification Regulation of Micrometer	Valid
JJG 21-1995	439	Add to Cart	4 days	Verification Regulation of Micrometer	Obsolete
JJG 21-1986	RFQ	ASK	3 days	velification Regulation of Micrometer with Measuring Range up to 500 mm	Obsolete

Similar standards

JJG 42   JJG 21   JJF 021   

Basic data

Standard ID: JJG 21-2010 (JJG21-2010)
Description (Translated English): Tobacco. Verification Regulation of Atmosphere Condition for Laboratory
Sector / Industry: Metrology & Measurement Industry Standard
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine

JJG 21-2010: Tobacco. Verification Regulation of Atmosphere Condition for Laboratory

---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.
Tobacco.Verification Regulation of Atmosphere Condition for Laboratory Ministry of People's Republic of China Metrology Verification Regulations JJG (Tobacco) 21-2010 Tobacco laboratory atmospheric environment verification procedures Released on.2010-08-02 2010-08-15 implementation National Tobacco Monopoly Bureau released Tobacco laboratory atmospheric environment verification procedures JJG (Tobacco) 21-2010 Replace JJG (Tobacco) 21-2003 This regulation was approved by the State Tobacco Monopoly Bureau on August 2,.2010, and since August 15,.2010 Implemented from day to day. Focal Point. Science and Technology Department of the State Tobacco Monopoly Bureau Main drafting unit. China Tobacco Standardization Research Center Participated in the drafting unit. National Meteorological Station Jiangsu Zhongyan Industry Co., Ltd. Xuzhou Cigarette Factory This regulation is interpreted by the National Tobacco Standardization Technical Committee. JJG (Tobacco) 21-2010 The main drafters of this procedure. Nursery (China Tobacco Standardization Research Center) Zhang Wei (China Tobacco Standardization Research Center) Participate in the drafters. Yang Rongchao (China Tobacco Standardization Research Center) Zhao Hang (China Tobacco Standardization Research Center) Fan Li (China Tobacco Standardization Research Center) Li Dong (China Tobacco Standardization Research Center) Xuan Xiaoquan (Xuzhou Cigarette Factory of Jiangsu China Tobacco Industry Co., Ltd.) Du Muzhu (Jiangsu China Tobacco Industry Co., Ltd. Xuzhou Cigarette Factory) Wang Xiaochun (Xuzhou Cigarette Factory of Jiangsu China Tobacco Industry Co., Ltd.) Zhu Lekun (National Meteorological Station) Wen Xiaoqing (National Meteorological Station) JJG (Tobacco) 21-2010

table of Contents

1 Scope (1) 2 Citations (1) 3 terms (1) 4 Overview (1) 5 Metrological performance requirements (1) 6 General technical requirements (2) 6.1 Laboratory Building Conditions (2) 6.2 Laboratory constant temperature and humidity system (2) 7 Measuring instrument control (3) 7.1 Verification conditions (3) 7.2 Verification project (3) 7.3 Verification method (3) 7.4 Processing of verification results (5) 7.5 Verification cycle (5) Appendix A Tobacco Laboratory Atmospheric Environment Calibration Record Format (6) JJG (Tobacco) 21-2010 Tobacco laboratory atmospheric environment verification procedures

1 Scope

This procedure is applicable to the first-time verification of the atmospheric environment of tobacco constant temperature and humidity laboratory after new construction, in use and overhaul of the system. Subsequent verification and in-use inspection.

2 Citations

This procedure refers to the following documents. GB/T 10739-2002 Standard atmospheric conditions for the treatment and testing of paper, board and pulp samples GB/T 16447-2004 Atmospheric environment for the regulation and testing of tobacco and tobacco products Use of this procedure should take care to use the current valid version of the above cited documents.

3 terms

This procedure specifies the following terms and applies only to this procedure. 3.1 Temperature fluctuation Continuously measure 24h temperature at a certain verification point in the work area, record one data every 2 minutes, within any 24h The extreme difference of the three 10min mean values of the 30min period represents the short-term fluctuation of temperature; continuous within 24h The extreme difference of the 48 30 min period mean represents the long-term fluctuation of temperature. 3.2 Temperature uniformity The temperature difference between the test points in the working area in any of the same 10min cycles indicates the temperature Uniformity. 3.3 Relative humidity fluctuation Continuously measure 24h relative humidity at a certain verification point in the work area, record one data every 2min, within 24h The extreme difference of the three 10min mean values of a 30min period represents the short-term fluctuation of relative humidity; continuous within 24h The extreme difference of the 48 30 min period mean represents the long-term fluctuation of relative humidity. 3.4 Relative humidity uniformity The range of relative humidity averages in all the verification points in the working area in the same 10min period For humidity uniformity.

4 Overview

The calibration of the atmospheric environment of the tobacco laboratory is based on the basic conditions of temperature and humidity of the tobacco laboratory using special measuring instruments. Measurement and calculation of temperature and humidity fluctuations and uniformity, fresh air replenishment, air flow and noise Calculate and judge whether the requirements are met according to the results. JJG (Tobacco) 21-2010 ......

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