Air Monitoring 23
Part 3 specifi es the testing procedures, description of laboratory tests and requirements of the testing laboratory to produce a test report, which then gives the DAHS manufacturer the opportunity to apply for a certifi cate according to EN 15267 Air quality - Certifi cation of automated measuring systems part 1 and 2.
Part 4 specifi es the requirements for on-going data acquisition and handling, which includes the requirements for installing QA/QC during QAL2 operation, and an annual functional test as illustrated in the fi gure below.
Reporting made easy
ABB’s CEM-DAS solution is a PC-based data acquisition and handling system for continuous emission monitoring applications that fully addresses the requirements of EN 17255. Scalable from single stack installation up to plants with multiple measuring points, CEM-DAS is a complete networkable system for continuous monitoring and evaluation of emissions data. Field data from gas analyzers, dust monitors and other equipment is acquired via conventional I/Os or via digital communication like Modbus TCP/IP is averaged to fi ve second segments which are then used by CEM-DAS to assess performance. All results and reports are saved in a database as well as an external data storage facility such as the end-user’s fi le system or a Network Attached Storage (NAS) for added redundancy.
For added security of data, the CEM-DAS server can be used with an optional Data Acquisition Unit controller, which can be used to buffer fi eld data. This ensures that the CEM-DAS server will still be able to retrieve and process any data in the event of a network issue or server shutdown, eliminating the risk of potential issues with authorities caused by reports being lost.
Users can view data either on the CEM-DAS server or via a web browser on a client PC, with the same level of functionality for viewing data such as bar and line charts, alarms and reports.
The system is also designed for remote maintenance, with users able to access CEM-DAS for purposes such as commissioning, troubleshooting, or assisting with queries.
Summary
EN 17255 allows DAHS manufacturers to certify their systems and allows end-users to select from certifi ed products. It guarantees that emissions or mass fl ow reporting is based on a standard that provides reproducible results, regardless of vendor-specifi c data processing implementation.
Furthermore, the QA/QC procedure ensures the quality of a DAHS over its lifetime. As much as the introduction of EN 14181 and EN 15267 changed the quality of CEM for Automated Measuring Systems, it is expected that EN 17255 will improve the quality of CEM reporting by DAHS. With options such as ABB’s CEM-DAS solution now available, users across industry can ensure complete uniformity and consistency of their measurements across their operations.
For more information about ABB’s technologies and expertise for CEMS applications, visit
https://bit.ly/ABB-CEMS.
Author Contact Details Christoph Becker, Portfolio Manager, CGA products, ABB AG • Email:
Christoph.becker@
de.abb.com • Web:
www.abb.com/measurement
WWW.ENVIROTECH-ONLINE.COM
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