ANNEX XII
SPECIFIC REQUIREMENTS
Permissible effect of disturbances
4.
For each of the volume fractions measured by the instrument, the critical change value is equal to the MPE for the parameter concerned.
5.The effect of an electromagnetic disturbance shall be such that:
either the change in the measurement result is not greater than the critical change value laid down in point 4;
or the presentation of the measurement result is such that it cannot be taken for a valid result.