High Performance Linearization Procedure for Emission Analyzers

Increasing requirements for the result quality of exhaust emission analyzers and state of the art analyzer technology require a new point of view regarding measuring range definitions and linearization procedures. To make best use of the power of this analyzer technology, linearization procedures need reconsideration.

In certification laboratories, legislation defines the procedures to linearize an exhaust emission analyzer more or less stringently. On the other hand, on testbeds for development purposes there are many possibilities for making use of today's improved analyzers. However, procedures are often used in development labs that are very similar to those mentioned in the legislation. For some measurement purposes it is necessary to leave these procedures regarding measuring ranges and their specifications behind.

The exhaust gas analyzing system has to provide consistent result quality during the whole test procedure. There is some potential to improve the existing situation in correcting the more or less non-linear physics of the detectors. Linearization algorithms should be able to correct the non-linearity of the detectors on the one hand and to be not sensitive to measurment deviations on the other.