OIML R 144-2 • Test procedures

1.10 Influence of gas components other than CO, NO and NO (cross sensitivity) (R 144-1, 8.4.2)

The influence shall be determined by registering the measuring signal when the following gas mixtures are supplied to the input:

  • zero gas N; then

  • each influencing gas alone in N; and finally

  • each influencing gas together with CO, NO and NO in N.

The list of influencing components and their limit content are established by the manufacturer.

The concentration (volume fraction) of a component to be determined shall correspond to 10 % of the upper level of the measurement range or subrange.