EPA has completed a project in 2016 and 2017 titled “A Project to Develop the Air Quality Monitoring Stations Data Acquisition and Handling System” to upgrade its existent system to meet the current and coming technological demands on monitoring data acquisition, site maintenances, data quality assurance and so on.
Chen-Wei International VR Co., Ltd. was awarded by EPA ”The Maintenance and Enhancement Project on the Air Quality Monitoring Data Acquisition and Handling System for Year 2019 and 2020”, which is primarily an extension project on the maintenance, operation, and upgrading for the installed EPA’s DAS/IOMS Systems and related signal conversion modules. The following tasks have been completed:
Maintenance for the previous project systems The communications between the analyzers and DAS/IOMS have been established and tested successfully per the protocols specifically for every individual brand and model of the analyzers newly purchased by EPA. (The number of new protocols is 12 ), IOMS’ Instrument Maintenance Reporting Module has been upgraded according to the reporting requirements for newly purchased analyzers and the comparing requirements between the new and old analyzers of the same pollutant, and the corrective maintenance have been conducted 309 times till 2020, October on DAS/IOMS and conversion modules, i.e. monthly average 20.6 times. Three performance indexes, system data missing rate, backup chance, and DAS rebooting chance, have been analyzed and recommended corrective actions accordingly, which resulted in the data missing rate greatly reduced.
Enhancements for the previous project systems To meet the growing demands resulted from new analyzers and user experience, some functions have been upgraded with the proceeding of
analyzers replacement. These functions include IOMS/DAS access management, improved graphical user interface connecting to each station, and adding a maintenance status flag to monitoring data which can be recognized in the EMC.
To build a centralized monitoring stations administration platform With the growing number of new analyzers installed, the following system re-configuration and parameters change greatly increased, and therefore the chance of human misoperation increased as well. A centralized administration platform is needed and has been developed to manage plenty change scenarios expected. The platform provides central access management for station DAS/IOMS system and door security, configuration management for station analyzers, parameter management for analyzers calibrations, application version management for DAS and IOMS systems installation, missing data rate collection and analysis, and so on.
