The force deflection ratio of the measuring instrument shall be not more than 10 N/mm. The position of the test rods (normally located perpendicular to the window/roof panel/-partition) are illustrated in Appendix 3, Figure 1.
La figure 1 de l'appendice 3 montre la position des barres de contrôle (normalement perpendiculaires à la vitre, au toit ouvrant ou à la cloison de séparation).