Intro4u2u

The CEMAS FTIR is based on the spectrometer MB 9100. It provides the high selectivity of the FTIR-technology and additional infrared components can easily be added if needed. The analysis system is used especially for the measurement of components like HCl, HF, NH3 or H2O that require hot & wet measurements. The measurement of O2 and THC can be integrated as well. Analysis systems must be serviced regularly to minimise failures and to increase life expectancy. The Analysers are measuring several components simultaneously. Advance Cemas-NDIR measures up to four gas components, e.g. CO, SO2, NO and O2, Advance Cemas-FTIR up to eight gas components, in individual cases even more. Furthermore, the analysis system Advance Cemas contains all components necessary for gas feed and conditioning, such as the cooler module with integrated gas feed unit. Due to the compact design of the systems especially short sample gas lines can be used and the number of connections minimised considerably. The simplified spare-parts stocking by using standard modules also results in a cost reduction.

Calibration concepts - convincing and cost-effective

Analysers have to be calibrated in certain intervals to ensure their accuracy and stability. The test gases and system components used for this calibration contribute considerably to the investment and operating costs. With the analysis system Advance Cemas-NDIR, can calibrate without test gases. The zero point or span point respectively for the oxygen measurement as well as the zero point for the infrared measurement is adjusted with ambient air. The span adjustment for oxygen measurement with the infrared Analyser Uras 14 are made by means of gas-filled, patented calibration cells. A long-time test over six years has proved the stability of these calibration cells. The calibration without test gases is run automatically. Due to its high stability the calibration costs of the Advance Cemas-FTIR are low. All instrument dependent factors are taken into consideration through the daily registration of the reference spectrum with zero gas. Because of this automatic zero point adjustment and the measuring principle, a calibration of zero and reference point every six months is sufficient to ensure smallest measuring ranges. The storage of test gas is not necessary. A calibration check with test gas can be carried out twice a year.

Everything under control

Usually, systems for emission monitoring are not installed at convenient locations. Therefore, normally an inspection on-site is required in regular intervals. Furthermore, you have to go to the analysis system to operate it. This is different with Advance Cemas; additional sensors in the Analyser and in the components for sample conditioning provide the status information centrally. Thus the gas flow is supervised, a condensate drain is recognised early, a message is displayed that the condensate bottle has to be emptied, or the complete optics is checked. Failures and frequent inspections can be avoided. All information is integrated into the status messages failure or maintenance required of the Analyser. Via the Ethernet interface detailed information can be obtained from a PC, e.g. in the control room, a diagnosis can be made or the Analyser can be remotely operated. Remote control becomes reality.

Advance Cemas-FTIR System Description

Measurement principle

The Advance Cemas FTIR is a multi-component emission monitoring system for simultaneously measuring HCl, HF, NH3, CO, NO, NO2, SO2, H2O, CO2 , O2 and total hydrocarbons. The infra-red-active measurement components are measured at high temperature (180oC) using an FTIR spectrometer (FTIR = Fourier Transform Infra Red). The O2 measurement is performed using an electrochemical oxygen sensor. The hydrocarbon content is measured using a flame ionisation detector (FID), when required.