ISO 12039 pdf download.Stationary source emissions — Determination of carbon monoxide, carbon dioxide and oxygen — Performance characteristics and calibration of automated measuring systems
1 Scope
This International Standard specifies the principles, the essential performance characteristics and the calibration of automated systems for measuring carbon dioxide, carbon monoxide and oxygen in the flues of stationary sources.
This International Standard specifies extractive and non-extractive systems in connection with several types of instrumental analyser. The following techniques have provided the basis for practical instrumentation:
— paramagnetism (O 2 );
— magnetic wind (O 2 );
— differential pressure (Quinke) (O 2 );
— magnetodynamics;
— zirconium oxide (O 2 );
— electrochemical cell (O 2 and CO);
— infrared absorption (CO and CO 2 ).
Other equivalent instrumental methods may be used provided they meet the minimum requirements proposed in this International Standard.
The measuring system may be calibrated with certified gases, in accordance with this International Standard, or comparable methods.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 61 45-2:— 1 ) , Gas analysis — Preparation of calibration gas mixtures using dynamic volumetric methods — Part 2: Volumetric pumps ISO 6879:1 995, Air quality — Performance characteristics and related concepts for air quality measuring methods ISO 1 0396:1 993, Stationary source emissions — Sampling for the automated determination of gas concentrations ISO 1 0849, Stationary source emissions — Determination of the mass concentration of nitrogen oxides — Performance characteristics of automated measuring systems
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply. 3.1 air point value obtained for O 2 when air is passed through the AMS 3.2 Automated Measuring System AMS system that can be attached to a duct to continuously measure and record the mass concentrations of CO, CO 2 , O 2 passing through the duct 3.3 analyser analytical part in an extractive or in situ AMS 3.4 calibration gas gas of known and reliable composition that can be used to check the response of the AMS and should be used for the calibration of the AMS 3.4.1 span gas gas used to adjust and check a specific point on a calibration curve 3.4.2 zero gas gas or gas mixture used to establish the zero point on a calibration curve within a given concentration range 3.5 calibration setting and checking of the AMS with a secondary or a working gas before determining the performance characteristics and before beginning any measurement of gases NOTE This procedure should be carried out at every calibration interval. 3.6 calibration interval period of time during which the AMS would normally be used between calibrations, respecting the indication given in periods of unattended operation 3.7 comparative measurements measurements taken on the same duct in the same sampling plane for the same period of time with the AMS under test and with the comparative method at points a short distance from each other, providing pairs of measured values 3.8 comparative method defined test method for obtaining comparative measurements of stationary source emissions containing CO, CO 2 and O 2 NOTE This can be a manual method or an AMS with a different measuring principle. 3.9 duct stack chimney or final exit duct on a stationary process used for the dispersion of residual process gases