Division 4.3 Statistical margin for Low beam AFS
United Kingdom
Where the Low beam AFS is present, formulae 9 shall be adapted to take into account the additional measurements required.
The value of the uncertainty ( ) that is to be used for the Low beam AFS shall be calculated with the following formulae 10 and 11:
Where:
n
Number of measurements of the sample, which is at least 5
mean of the n values of Pc