Emerson Rosemount CCO 5500, Справочное руководство

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1.2 Overview
Rapid advances in design of across the duct infrared gas analyzers have led to the general
acceptance of this technique for monitoring gas levels in flue gases of power generation
boilers and large industrial process steam boilers.
The Rosemount
™
CCO 5500 Carbon Monoxide (CO) analyzer is designed to operate on
duct widths of less than 26 ft. (8 m) at flue gas temperatures up to 572 °F (300 °C).
NOTICE
The instrument can achieve temperatures up to 1200 °F (650 °C), but degradation in instrument
accuracy will occur.
The rugged construction makes installation extremely simple, and through the use use of
microprocessor technology, the Rosemount CCO 5500 has many advanced features:
• Serial data facility to allow communication between analyzers and a central data
logging station.
• User-definable output in either mg/m
3
, mg/Nm
3
, or ppm.
• Four rolling averages are held, selectable from 10 seconds to 30 days.
• Integral, back-lit 32 character LCD provides diagnostic and measurement
information.
• Plant status input to prevent emissions dilution during off periods.
1.3 System description
The Rosemount
™
CCO 5500 Analyzer consists of four items ( Figure 1-2 ):
• An infrared source unit to project a beam of infrared radiation across the duct.
• A receiver to measure radiation.
• A power supply unit to provide the necessary power rails.
• A control unit to compute the gas concentration from the signals provided by the
receiver unit.
Each of these units is designed to be rugged and flexible. They are all fully sealed to IP65
standards and are suitable for outside mounting without the need for further
weatherproof enclosures.
Description and specifications
Reference Manual 3