Up to now it was necessary that with the exhaust gas measuring
the recall of the tests (ECE, CVS, Japan etc.) was coordinated by a
master computer who collected the data, processed them and recorded
them via the peripheral equipment or that an operator undertook
these functions.
In a modern processing system the control and evaluation expense
in the central computer is reduced by the reasonable application of
microprocessors in the different decentralized units such as
analysing systems, CVS-systems, driver's aid and so on.
For this purpose in the individual units are executed
independently in the following operations: - sequence control -
independent execution of calibrations - automatic switching over of
the measuring range - conversion of the measuring values into
physical values - linearization
Specified interfaces and standardized transmission software
facilitate the interplay of the units with a master computer.
In addition a further step for the displacement of the computer
intelligence is realized by fitting up the analyzers contained in
the units with own microprocessors