Teledyne Analytical Instruments LGA 4000 Analyzer.

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Presentation transcript:

Teledyne Analytical Instruments LGA 4000 Analyzer

Teledyne Analytical Instruments 2 Overview  Theory of Operation  Electromagnetic Spectroscopy  Laser Tunable Diode  Wavelength Selection  LGA 4000 In-situ Analyzer  LGA 4000 Extractive Analyzer  Instrument Specifications  Applications

Teledyne Analytical Instruments 3 Theory of Operation  Electromagnetic Spectroscopy E1E1 E2E2 photon Energy level transition Molecules absorb EM radiation  Raise energy level of electrons at certain wavelengths  Each molecule has unique frequency response  E = h Nuclei Rotation Nuclei Vibration Electron Movement

Teledyne Analytical Instruments 4 Theory of Operation Emit EM radiation through sample gas Measure absorbance A = log 10 (I o /I t ) Beer Lambert Relationship –A=εbc –ε=molar absorption –b=path length –c=gas concentration Gas

Teledyne Analytical Instruments 5 Theory of Operation Diode Laser Absorption Spectroscopy –“Monochromatic” bandwidth –Bandwidth nm –Adjust laser temperature, current

Teledyne Analytical Instruments 6 Theory of Operation Laser spectral scan is larger than gas absorption spectral line width Reference signal is compared to sample gas signal Calculation of T=Tb/Ta provides accurate concentration measurement

Teledyne Analytical Instruments 7 Theory of Operation

Teledyne Analytical Instruments 8 Theory of Operation Spectral analysis of background gases and sample gas Frequency must be found such that only sample gas is attenuated

Teledyne Analytical Instruments 9 LGA 4000 In-Situ Analyzer

Teledyne Analytical Instruments 10 LGA 4000 In-Situ Analyzer

Teledyne Analytical Instruments 11 LGA 4000 Extractive Analyzer

Teledyne Analytical Instruments 12 Analyzer Specifications Optical Path Length: <= 15m Response Time: <= 1s Linear Accuracy: <= +/-1% FS Span Drift: <= +/- 1% FS Calibration: 2/year Enclosure: IP65 Explosion Proof: Expxmd IICT5 Power: 24VDC/110VAC/220VAC Ambient Temperature: -30 to 60C Optical Path Length: 0.5m or 1.1m Response Time: <= 5s (T90) Gas Temperature: -30 to 140C Gas Pressure 0.5 to 3 Bara In-Situ System Extractive System

Teledyne Analytical Instruments 13 Applications GasLDLRangeGasLDLRange O2O2 0.01% Vol.0-1% Vol., 0-100% Vol.CO40 ppm ppm, 0-100% Vol. CO 2 20 ppm ppm, 0-100% Vol.H2OH2O0.03 ppm0-3 ppm, 0-70% Vol. H2SH2S2 ppm0-200 ppm, 0-30% Vol.HF0.01 ppm0-1 ppm, ppm HCL0.01 ppm0-7 ppm, ppmHCN0.2 ppm 0-20 ppm ， 0-1% Vol. NH ppm0-10 ppm, 0-1% Vol.CH 4 10 ppm0-200 ppm, 0-10% Vol. C2H2C2H2 0.1 ppm0-10 ppm, 0-70% Vol.C2H4C2H4 1.0 ppm0-100 ppm, 0-70% Vol.