NGA 2000 CLD NO/NOx Analyzer Module

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Thermoelectrically-cooled solid-state detector insures high stability Modular design provides mounting and system expansion flexibility Fast response-90% fullscale within 1 second Four (4) user-selectable ranges from 0 to 10,000 ppm Automated ozonator shutoff on loss of air pressure Remote control and automatic calibration On-line diagnostic capabilities Sample flow measurement available Efficient, interferent-free vitreous carbon NO2 converter

Modular design and network communication are the key characteristics of the NGA 2000 CLD NO/NOx analyzer module. The CLD analyzer module provides quick and accurate measurement of oxides of nitrogen (NO/NOx) over a wide dynamic range from 0 to 10 ppm through 0 to 10,000 ppm. Designed for such varied applications as continuous emissions monitoring systems (CEMS), process gas analysis and internal combustion engine emissions (ICEE), the CLD analyzer module exceeds performance and reliability expectations. Emerson’s Rosemount Analytical NGA 2000 CLD NO/NOx analyzer module was the industry’s first modular chemiluminescence analyzer. It is a self-contained unit complete with detector and electronics. The modular design allows for easy system integration. The CLD analyzer module may be a "stand alone" analysis instrument with the addition of our input/output (I/O) module and platform or it can be integrated into a sophisticated multi-component analysis network. What makes the NGA 2000 series analyzer modules unique is their built-in intelligence and their ability to share that intelligence. Embedded in the NGA 2000 architecture is an advanced digital communication network (LON) which allows interaction between other analyzer modules in the system. The network carries all pertinent analyzer outputs and diagnostic variables to a centralized display panel on the platform or remote PC. Because of this distinctive feature, the CLD analyzer module may be incorporated into a panel/rack or it can be placed near the sample source up to a mile away, thereby greatly reducing sample handling requirements. FEATURES Microprocessor-based operation, advanced diagnostics and the incorporation of technological advancements are distinctive attributes of the CLD analyzer module. New refinements added to the CLD detector have enhanced overall performance. One of these improvements is the addition of a solidstate detector (silicon photodiode). This photodiode replaces the expensive and bulky photomultiplier tube found in traditional chemiluminescence analyzers. The photodiode improves stability and reduce maintenance due to the extended life of this component. The addition of a two-stage thermoelectric cooler inside the photodiode detector assembly further improves stability and the signal-to-noise ratio because the detector is operated at low temperature. Emerson’s innovative ozone generator also improves measurement stability by providing tighter temperature control. The CLD analyzer module incorporates a pressure monitor which automatically turns off the ozonator upon loss of air or oxygen source gas. This feature prevents the possibility of ozone diffusion and the consequent corrosion of metallic elements in the detector. Sample flowrate and pressure, ozonator air pressure and converter temperature monitoring are standard features of this module. On-line availability of these parameters along with advanced diagnostic information such as power supply voltages, detector block temperature, last calibration values, etc. provide improved performance and serviceability. Maintenance checks on the instrument can be performed remotely without having to take the unit out of service to test internal components. For applications where remote operation is desired, the analyzer can be controlled through its I/O module or the LON network. I/O module capabilities include analog outputs, three alarm relays, remote range change and identification, auto range change, remote NO/NOx mode switching and ozonator operation and auto calibration sequence timing including zero/span gas valve control. The LON network carries all analyzer variables and diagnostics. Network connection can be made to the NGA platform or PC up to a mile away from the analyzer module. As technology changes, we allow upgrade of your analyzer module with the latest advancement without further change to other modules. This flexible and expandable modular approach creates a gas analysis system resistant to obsolescence that will provide the solution to your measurement requirements now and into the next century.