3.1 General

The gas analytical system consists of a means for sampling, preparation of samples, and measurement of the CO, NO, NO or NO concentration in the pipes and gas ducts of industrial enterprises, as well as a means for conveying the gas sample through a gas handling system. The gas analyzer incorporated in the gas handling system analyzes the sample and provides a signal related to the volume fraction of the gas component being determined which arrives at the data accumulation unit where it is processed, recorded and stored.

The metrological characteristics of the gas analytical system depend on the corresponding characteristics of the units included. An example of the composition of a gas analytical system using calibration gas mixtures for its adjustment is shown in Figure 1.