NGA 2000 FID-2 Hydrocarbon Analyzer Module

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Fast response – 90% fullscale within 1 second Automatic flame ignition under safe conditions Intrinsically safe/explosion-proof pneumatic section eliminates purge requirement Improved stability and signal-to-noise ratio Modular design allows custom mounting near sample source Advanced diagnostic capabilities

Emerson's Rosemount Analytical NGA 2000 FID2 Hydrocarbon Analyzer Module is the industry’s first modular total hydrocarbon analyzer. It is a self-contained unit, complete with detector and electronics. The analyzer module’s expandability allows for system integration. The FID2 Analyzer Module can be part of a sophisticated network or a "stand alone" analysis instrument when combined with the NGA 2000 Platform and Input/Output (I/O) Module. What makes the family of NGA 2000 analyzer modules unique is its advanced communication network which allows identification of and interaction with other modules in the analytical system. Because of this unique feature, the FID2 Analyzer Module may be incorporated either into a panel/rack or placed near the sample source up to a mile away, thereby reducing sample handling requirements. Designed for continuous measurement of hydrocarbon gas concentration, the NGA 2000 FID2 Analyzer Module delivers unmatched measurement accuracy, reliability, ease of use, simplified maintenance, advanced communication capability and flexibility. Key to these attributes is the detector assembly which utilizes flame ionization detection FID2 technology. This methodology achieves hydrocarbon measurement from 0 to 1 ppm methane (CH4) to 0 to 5% methane (CH4) with the accuracy of ± 1% of fullscale. This array of ranges provides great versatility. FEATURES In our continuing effort to improve technology, Emerson has achieved superior flame ionization detector design. In addition, the NGA 2000 FID2 Analyzer Module contains a software-independent safety design which utilizes intrinsically safe components for plant and personnel safety. The FID2 Analyzer Module is divided into two parts – a pneumatic section and an electronic section. The two sections are separated by a pair of solid partitions to prevent any gas leak in the pneumatic section from reaching the electronics. The electrical connections into the pneumatic section are made intrinsically safe by a series of over-voltage protection devices and current-limiting resistors. The combination of these two techniques allows the analyzer to meet international safety standards without the use of an expensive continuous dilution purge. Note: due to this analyzer's unique safety design, the FID2 Analyzer Module may not be mounted within a conventional NGA 2000 Platform. The FID2 Analyzer Module contains performance features as well as diagnostics that put it ahead of the competition via response time, accuracy, ease of service and maintenance. Performance capabilities consist of full dynamic range control by software via operator interface; response time of less than 1 second for 90% of fullscale; auto ignition available for initial ignition of burner; automatic shutoff of burner fuel (pure H2) at low sample pressure for increased burner life; corrosion-resistant, stainless steel components as standard. TYPICAL APPLICATIONS The NGA 2000 FID2 Analyzer Module is designed to perform a variety of functions across many applications such as: Measures hydrocarbons in exhaust emissions from internal combustion engines Detects trace levels of hydrocarbon contaminants in pure gases used in the semiconductor industry Monitors hydrocarbon contaminants in ambient air and other gases Monitors engine combustion efficiency Monitors hydrocarbons in cryogenics/air liquefaction processes DIAGNOSTIC CAPABILITES Diagnostic capabilities consist of the following measurements: Temperature of preamplifier and burner Pressure of burner fuel, burner air and sample Polarizing voltage to burner Power supply voltages Status of safety system components Status of the block heater Status of ionization flame PRINCIPLE OF OPERATION The FID2 Analyzer Module uses the flame ionization method of detection. The sensor is a burner in which a regulated flow of sample gas passes through a flame sustained by regulated flows of a fuel gas (hydrogen or a hydrogen/diluent mixture) and air. Within the flame, the hydrocarbon components of the sample stream undergo a complex ionization that produces electrons and positive ions which are collected by an electrode causing current to flow through a measuring circuit. The ionization current is proportional to the rate at which carbon atoms enter the burner and is therefore a measure of the concentration of hydrocarbons in the sample. This measurement of concentration is placed on the network, where it can be shown on the platform display or on other data acquisition devices.