The ML®660 or 660 ®Open Architecture (OA) is a pre-engineered Continuous Emissions Monitoring System (CEMS) designed for use in EPA 40 CFR Part 60 and Part 75, International Directives, compliance applications and for process control. This system can be configured to accurately measure SO2, NOx, NH3, CO, CO2, and /or O2 on a dry basis.
Both configurations of the ML®660 CEMS consist of a heated probe, heated sample umbilical, and single bay cabinet. Each system includes analyzers, control equipment, and a sample conditioning package. Using conventional extractive principles, a vacuum pump draws unconditioned, temperature controlled (above dew point) stack gas through the filtered probe, heated sample line, and into the sample conditioner where moisture and fine particulate are removed. The now dry, cool stack gas is delivered to a sample manifold for distribution to each analyzer.
A controller performs all automatic sequencing of the sample cycle, daily calibration cycle, and back purge cycle. During calibration mode, zero and span gases are injected into the probe head to comply with EPA calibration requirements. Back purge air is delivered to the probe on a periodic basis to clean the heated probe filter, providing months of continued operation without maintenance.
In addition, the controller has the ability to log fuel flows and provide the required analog outputs in units of diluent corrected ppm concentration (ppmc), lb/mmBtu, lb/hour and metric units. Standard relay outputs that signal system status and fault information are also generated from the controller. A RegPerfect® Data Acquisition System (DAS) may be attached to the controller via Ethernet to provide long term data collection, compliance report generation, remote control and diagnostic information.
The ML®660 is a self-contained system requiring single point attachment for power, instrument air, and calibration gases. All utility distributions are routed through the ML®660 internally. No duplication of utilities is required on the stack.
