Introduction
The Gasmet FTIR analyzer is an ideal tool for toxicity test in fire testing application. It can be used in conjunction with Cone Calorimeter, NBS Smoke Density Chamber for online measurements of combustion gases in fire tests.
Typical application for CEM is H2O, CO2, CO, N2O, NO, NO2,SO2, HCl, HF, NH3, CH4, C2H6, C3H8, and C2H4. The Gasmet FTIR can be easily to configured for a new set of compounds.
Measured components and calibration ranges can be changed according to application. This technical data sheet describes one example of the system.
The system is used for on-line measurements. It is an ideal tool to use for measuring trace concentrations of gas in combustion studies. All parts of the Gasmet CEMS are be heated up to 180 ºC. It can be used for undiluted gases and the sample gases do not need drying beforehand.
The Gasmet FTIR system consists of Gasmet gas analyser- it is configured to meet ISO 19702 standard, Gasmet PC, Gasmet sampling system. All parts of the system are 19" rack mounted cabinet.
The Gasmet FTIR system includes all power connections and temperature controllers for heated lines and heated sample probe. The operation of the system is fully automatic and controlled by the Calcmet software.
Gasmet PC and Calcmet application software control the systen. The measuring data can be transferred from the PC to the Control room with digital outputs (ModBus) or with analog outputs 4-20 mA.
The Gasmet FTIR system provides different alarm functions such as Function alarm, Service alarm and System alarm. Function and service alarms are associated with the Gasmet FTIR Gas Analyzer and with the Calcmet analysis software. A system alarm comes from Gasmet sampling system and it includes temperature alarms (from sample probe, heated lines, sampling unit), flow alarm and pressure alarm for zero gas. If any of the critical alarms is activated, instrument air starts to flow automatically into the system to prevent condensation.
General parameters
Measuring principle: FTIR (Fourier transform infrared)
Performance: Simultaneous analysis of up to 50 gas components
Operating temperature: 20 ± 20 °C, non-condensing,dust free ambient air.
Storage temperature: -20 - +60 °C
Response time, T90: < 120 s, depending on the gas flow and measurement time
Gas cell temperature: 50-180 °C
Sample gas: Non-condensing, particle free
Flow rate: 0~ 4 l/min
Sample gas pressure: Ambient
Measuring parameters
Zero point calibration:24 hours, calibration with nitrogen(5.0 or higher N2 recommended);
Zero point drift: < 2 % of measuring range per zero point calibration interval;
Sensitivity drift: None;
Linearity deviation: < 2 % of measuring range;
Temperature drifts: < 2 % of measuring range per 10K temperature change;
Pressure influence: 1 % change of measuring value for 1 % sample pressure change. Ambient pressure changes measured and compensated.
System alarm:
Gasmet FTIR gas analyzer and Calcmet application software.
Gasmet FTIR gas analyzer and Calcmet application software. Heated module temp. low/high Line 1 temperature low/high Line 2 temperature low/high.
Line 3 temperature low/high Flow alarm low.
Zero gas pressure low.
Heated lines
Tube size: 4/6 mm
Core material: Teflon core
Operating pressure: Maximum 400 kPa
Temperature: Maximum 200 ºC
Fittings: 6 mm Swagelok
Power supply: 230 VAC or 115 VAC Power density: 120 watts /meter
The maximum length for the heated line is 30 m with 230 VAC and 15 m with 115 VAC power supply. All analysers are connected together with 1 m heated lines. Other lengths over 30 m (230 VAC) and temperatures are available on request.
Sample probe
Sample probe PSP4000H
Power consumption: 800 watts
Operating temperature: 180 ºC
Filter element: Ceramic, 2 μm
Dust loadings: < 2 g/m3 Probe tube
Material: SS 316
Probe length: One (1) meter
Sample temperature: 600 ºC max.
Sample pressure: 0.4 to 6 bar Mounting flange: DN65PN6
Electrical connections
Main supply: 3 x 16 A, 3 x L+N+PE
Power consumption: 7,5 kW (the full Gasmet CEMS including FTIR gas analyzer, PC, sampling unit, Gasmet O2 analyzer, sample probe and heated lines 21 m)
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