GB/T 5275.7-2014 English PDFUS$294.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 5275.7-2014: Gas analysis -- Preparation of calibration gas mixtures using dynamic volumetric methods -- Part 7: Thermal mass-flow controllers Status: Valid
Basic dataStandard ID: GB/T 5275.7-2014 (GB/T5275.7-2014)Description (Translated English): Gas analysis -- Preparation of calibration gas mixtures using dynamic volumetric methods -- Part 7: Thermal mass-flow controllers Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G86 Classification of International Standard: 71.040.40 Word Count Estimation: 15,177 Date of Issue: 7/8/2014 Date of Implementation: 12/1/2014 Quoted Standard: ISO 6143; GB/T 5275.1-2014; ISO 7504 Adopted Standard: ISO 6145-7-2009, IDT Regulation (derived from): 2014 National Standards Bulletin No. 18 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the use of a commercially available thermal mass flow controller calibration gas mixture containing two or more components continuously prepared using pure gas or gas mixture method. Use of this standard be prepared calibration gas GB/T 5275.7-2014: Gas analysis -- Preparation of calibration gas mixtures using dynamic volumetric methods -- Part 7: Thermal mass-flow controllers---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. . Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 7.. Thermal mass-flow controllers ICS 71.040.40 G86 National Standards of People's Republic of China Dynamic volume of gas analysis prepared by mixing calibration Gas - Part 7. Thermal mass flow controllers methods-Part 7. Thermalmass-flowcontrolers (ISO 6145-7.2009, IDT) Issued on. 2014-07-08 2014-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordGB/T 5275 "gas analysis dynamic volume Preparation of calibration gas mixtures" is divided into the following sections. --- Part 1. calibration method; --- Part 2. positive displacement pump; --- Part 4. continuous injection; --- Part 5. Capillary calibration devices; --- Part 6. Critical orifices; --- Part 7. Thermal mass flow controller; --- Part 8. Diffusion method; --- Part 9. Saturation method; --- Part 10. Permeation; --- Part 11. Electrochemical method occurs. This section GB/T 5275 Part 7. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method identical with ISO 6145-7.2009 "gas analysis dynamic volume Preparation of calibration gas mixtures article Part 7. Thermal mass flow controllers. " Consistency correspondence between this part of international documents and normative references of our files are as follows. --- GB/T 10628-2008 gas analysis calibration gas mixture composition measurements and calibration comparison (ISO 6143.2001, IDT); --- GB/T 14850-2008 gas analysis vocabulary (ISO 7504.2001, IDT). This part is proposed by the China Petroleum and Chemical Industry Association. This part of the National Gas Standardization Technical Committee (SAC/TC206) centralized. This section drafted by. China Institute of Metrology, Southwest Chemical Industry Research and Design Institute Limited. The main drafters of this section. Hushu Guo, Chen Yali. Dynamic volume of gas analysis prepared by mixing calibration Gas - Part 7. Thermal mass flow controllers1 ScopeGB/T 5275 This section describes in detail the use of commercially available thermal mass flow controller uses pure gas or gas mixture containing two successive preparation Method of calibrating one or more components of the gas mixture. Use this method for preparation of a calibration gas mixture can achieve the best level as follows. Relative expanded uncertainty of measurement (the combined standard uncertainty Multiplied by a predetermined degree of coverage factor k = 2 to obtain) U is not greater than 2%. Such as the use premixed gas instead of pure gas can be prepared by mixing the gas mole fraction of less than 10-6. Mass flow measurement is not absolute The mass flow controller needs to be calibrated separately. The advantage of this preparation method is that a large number of mixed gas can be produced continuously, as long as the use of an appropriate number of thermal mass flow controllers, It can be prepared as binary mixed gas as easily prepared multi-component gas mixture. NOTE. The gas mixing system with thermal mass flow controller-based, and some also include computers and automatic control device commercialization.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. ISO 6143 Gas analysis composition of calibration gas mixtures - Determination and verification of Comparative Law (Gasanalysis-Comparison methodsfordeterminingandcheckingthecompositionofcalibrationgasmixtures) GB/T 5275.1-2014 gas analysis dynamic volume method for the preparation of calibration gas mixtures - Part 1. calibration method (ISO 6145-1.2003, IDT) ISO 7504 Gas analysis vocabulary (Gasanalysis-Vocabulary)3 Terms and DefinitionsTerms and definitions as defined in ISO 7504 apply to this document. Principle 4 This section describes the use of a commercially available thermal mass flow controller continuously producing two or more components use pure gas or mixed gas calibration mix Combined method of gas. The flow controller setpoint is adjusted to a preset value, the continuous and rapid change the composition of the gas mixture. By selecting the appropriate When the thermal mass flow controller combination, the use of pure gas dilution, the volume fraction can change the target component gas 1,000 times.5 program5.1 Overview Under constant pressure to each of the gas component in a known and controlled flow rate from a calibrated thermal mass flow controllers to prepare a mixed effluent gas. When an acceptable measurement uncertainty, requires the use of high-precision flowmeter without considering the set mass flow controller, the measured ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 5275.7-2014_English be delivered?Answer: Upon your order, we will start to translate GB/T 5275.7-2014_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 GB/T 5275.7-2014_English with my colleagues?Answer: Yes. 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