4. Service Locations In UK and Ireland Eire Kilkenny Stroud Darlington Folkestone Sheerness Welwyn Garden City Tamworth Bedford ET Offices ET Service Centres
18. Wavelength Intervals CO N 2 O CH 4 HF NO,NH 3 NO 2 SO 2 , CS 2 Hg O 3 Cl 2 , ClO 2 BTX,Phenol Formaldehyde CO 2 HCl H 2 O /nm /nm 200 400 600 1300 1600 1900 2200 2500 C x H y AR600 AR650
20. The Beer-Lambert Law The relationship between the absorbed light and the number of molecules in the path. Absorbed Light is Directly Propotional to the Concentration
21. Span and Zero Calibration – CEM Calibration bench Analyser Standard gas Calibration cell Power supply Receiver Emitter
22. Calibration (C p x L p = C c x L c ) C p= Concentration in the measuring path L p= Length of the measuring path(/diameter) C c= Concentration in the cell (=gasbottle) L c= Length of the Calibration Cell Example: 100 ppb x 500 m = 1000 ppm x 0,05 m “ Optical density”
23. Schematic of Opsis System Typical Opsis CEM layout Fibre optics receiver emitter Signal cables
27. CO, SO 2 O 2 NO, NO 2 IR UV Probe box with heated sample filter Heated sample line Zero calibration solenoid valve Gas cooler and condensate drain condensate alarm Sample pump Flowmeters with alarms NOx converter Typical Extractive CEM
58. Therefore Total Hours = 105120 Lost = 40 (0.04%) Up Time = 99.96% Note: Lost hours on software are 100% recoverable as the data is backed up on the analyser