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EN ISO 6145-7:2010

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 7: Thermal mass-flow controllers (ISO 6145-7:2009)
Superseded date

30-06-2019

Published date

22-12-2010

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Set-up
6 Preparation of gas mixtures
7 Calculations
Annex A (informative) - Pre-mixed gases for preparation
        of mixtures of high dilution
Annex B (informative) - Practical hints
Annex C (informative) - Calculation of uncertainties
Bibliography

ISO 6145-7:2009 specifies a method for continuous production of calibration gas mixtures, containing two or more components, from pure gases or other gas mixtures by use of commercially available thermal mass-flow controllers. If this method is employed for the preparation of calibration gas mixtures, the optimum performance is as follows: the relative expanded uncertainty of measurement, U, obtained by multiplying the combined standard uncertainty by a coverage factor k = 2, is not greater than 2 %.If pre-mixed gases are used instead of pure gases, mole fractions below 10-6 can be obtained. The measurement of mass flow is not absolute and the flow controller requires independent calibration.The merits of the method are that a large quantity of the gas mixture can be prepared on a continuous basis and that multicomponent mixtures can be prepared as readily as binary mixtures if the appropriate number of thermal mass-flow controllers is utilized.

Committee
CEN/BT
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Superseded
SupersededBy

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DIN EN 14626:2012-12 Ambient air - Standard method for the measurement of the concentration of carbon monoxide by non-dispersive infrared spectroscopy
BS EN 14211:2012 Ambient air. Standard method for the measurement of the concentration of nitrogen dioxide and nitrogen monoxide by chemiluminescence
UNE-EN 14662-3:2016 Ambient air - Standard method for the measurement of benzene concentrations - Part 3: Automated pumped sampling with in situ gas chromatography
I.S. EN 14211:2012 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF NITROGEN DIOXIDE AND NITROGEN MONOXIDE BY CHEMILUMINESCENCE
I.S. EN 14625:2012 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF OZONE BY ULTRAVIOLET PHOTOMETRY
I.S. EN 14626:2012 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF CARBON MONOXIDE BY NON-DISPERSIVE INFRARED SPECTROSCOPY
I.S. EN 14212:2012 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF SULPHUR DIOXIDE BY ULTRAVIOLET FLUORESCENCE
I.S. EN 14662-3:2015 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF BENZENE CONCENTRATIONS - PART 3: AUTOMATED PUMPED SAMPLING WITH IN SITU GAS CHROMATOGRAPHY
VDI 2100 Blatt 3:2011-10 Determination of gaseous compounds in ambient air - Determination of indoor air pollutants - Gas chromatographic determination of organic compounds - Active sampling by accumulation on adsorbents - Thermal desorption
BS EN 60079-29-1:2007 Explosive atmospheres Gas detectors. Performance requirements of detectors for flammable gases
DIN EN 14625 E : 2012 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF OZONE BY ULTRAVIOLET PHOTOMETRY
DIN EN 14626 E : 2012 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF CARBON MONOXIDE BY NON-DISPERSIVE INFRARED SPECTROSCOPY
EN 14662-3:2015 Ambient air - Standard method for the measurement of benzene concentrations - Part 3: Automated pumped sampling with in situ gas chromatography
UNI EN 14625 : 2012 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF OZONE BY ULTRAVIOLET PHOTOMETRY
UNI EN 14626 : 2012 AMBIENT AIR QUALITY - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF CARBON MONOXIDE BY NONDISPERSIVE INFRARED SPECTROSCOPY
UNI EN 14211 : 2012 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF NITROGEN DIOXIDE AND NITROGEN MONOXIDE BY CHEMILUMINESCENCE
UNE-EN 14626:2013 Ambient air - Standard method for the measurement of the concentration of carbon monoxide by non-dispersive infrared spectroscopy
BS EN 14662-3:2015 Ambient air. Standard method for the measurement of benzene concentrations Automated pumped sampling with in situ gas chromatography
UNE-EN 14625:2013 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
BS EN 14625:2012 Ambient air. Standard method for the measurement of the concentration of ozone by ultraviolet photometry
UNE-EN 14211:2013 Ambient air - Standard method for the measurement of the concentration of nitrogen dioxide and nitrogen monoxide by chemiluminescence
UNE-EN 14212:2013 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence
EN 14626:2012 Ambient air - Standard method for the measurement of the concentration of carbon monoxide by non-dispersive infrared spectroscopy
EN 14212:2012/AC:2014 AMBIENT AIR - STANDARD METHOD FOR THE MEASUREMENT OF THE CONCENTRATION OF SULPHUR DIOXIDE BY ULTRAVIOLET FLUORESCENCE
EN 14211:2012 Ambient air - Standard method for the measurement of the concentration of nitrogen dioxide and nitrogen monoxide by chemiluminescence
EN 14625:2012 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
BS EN 14212:2012 Ambient air. Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence

ISO 14511:2001 Measurement of fluid flow in closed conduits Thermal mass flowmeters
ISO 6143:2001 Gas analysis — Comparison methods for determining and checking the composition of calibration gas mixtures
ISO 6142:2001 Gas analysis Preparation of calibration gas mixtures Gravimetric method
ISO 7504:2015 Gas analysis Vocabulary
ISO 6145-1:2003 Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 1: Methods of calibration
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

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