Division 2.3.1.2
Upon initial installation and after major maintenance, the requirements of paragraph 2.3.1.2.1. of this Sub-Annex and either paragraph 2.3.1.2.2. or 2.3.1.2.3. of this Sub-Annex shall be satisfied. The speed difference between the front and rear rollers is assessed by applying a 1 second moving average filter to roller speed data acquired at a minimum frequency of 20 Hz.