ML ® 660 Continuous Emission Monitoring System0 pages

35 Inverness Drive East
Englewood, Colorado 80112, U.S.A.
Phone: 303-792-3300 Fax: 303-799-1409
Email: Tml_sales@teledyne.com
www.teledyne-ml.com

ML ® 660 Continuous Emission Monitoring System
THEORY OF OPERATION
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 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 programmable logic controller (PLC) performs all automatic sequencing of the sample cycle, daily calibration cycle, and backpurge
cycle. During calibration mode, zero and span gases are injected into the probe head to comply with EPA calibration requirements.
Backpurge 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 PLC has the ability to log fuel flows and provide the required analog
outputs in units of diluent corrected ppm concentrations (ppmc), Lbs/MBTU, and
Lbs/Hr. Standard relay outputs that signal system status and fault information are
also generated from the PLC. A RegPerfect® Data Acquisition System (DAS) may be
attached to the PLC 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.

ML ® 660 FEATURES
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EPA certifiable for all 40 CFR 60 and 40 CFR 75 applications.

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This system is well suited to generate reliable and accurate process control information. Typical applications include gas turbines, industrial sources, and
power boilers.

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State of the art TML T-Series® analyzers are utilized for pollutant monitoring.
This allows a single source for system as well as analyzer support.

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Automatic, local and remote initiation of any system sequence is available. This
includes the ability to zero and span a single analyzer both through the entire
sampling train or directly at the analyzer to diagnose sampling system anomalies.

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Minimal maintenance is required. Weekly manual calibrations, quarterly probe
checks, and quarterly filter changes are typically all the system requires to
achieve uptime of 95% or greater, and

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Self-diagnosing alarm package. The ML®660 will alarm the user for sample train
heater failures, sample conditioning failures, probe and sample line pluggage,
and analyzer faults. This system is smart enough to protect itself during a fatal
fault condition thereby eliminating the possibility of moisture contamination.