Kalibrier- und Bedienkonzept für Analysengeräte

Summary

Most of the sensors for gas analyzers for industrial use provide analog signals. The design of new microprocessor-based analyzers often leaves the analog preconditioning of signals unchanged. Better results are within reach when this preconditioning is substituted by an analog to digital conversion as near to the sensor as possible. This may lead to units without any analog trimming elements and gives essentially altered methods of calibration and operation. In case of production the analyzer can completely be calibrated under control of an external computer.

As an example a new signalprocessing for a well-known sensor based on the thermal conductivity of gases is discussed.