Document ID: chunk:federal_register_of_legislation:F2019C00042:front:0:p27
Version: federal_register_of_legislation:F2019C00042
Segment Type: other
Provision Reference: 
Character Range: 74836–77503

for a period of 50 hours.

         7.2.2. On completion of the exposure test the assembly shall be gently washed, or dipped in clean running water with a temperature not higher than 38 °C to remove any salt deposit that may have formed and then allowed to dry at room temperature for 24 hours before inspection in accordance with paragraph 6.2.1.2. above.

         7.3. Micro‑slip test (see Annex 11, figure 3 to this Regulation)

         7.3.1. The samples to be submitted to the micro‑slip test shall be kept for a minimum of 24 hours in an atmosphere having a temperature of 20 + 5 °C and a relative humidity of 65 + 5 per cent. The test shall be carried out at a temperature between 15 and 30 °C.

         7.3.2. It shall be ensured that the free section of the adjusting device points either up or down on the test bench, as in the vehicle.

         7.3.3. A 5 daN load shall be attached to the lower end of the section of strap. The other end shall be subjected to a back and forth motion, the total amplitude being 300 + 20 mm (see figure).

         7.3.4. If there is a free end serving as reserve strap, it must in no way be fastened or clipped to the section under load.

         7.3.5. It shall be ensured that on the test bench the strap, in the slack position, descends in a concave curve from the adjusting device, as in the vehicle. The 5 daN load applied on the test bench shall be guided vertically in such a way as to prevent the load swaying and the belt twisting. The attachment shall be fixed to the 5 daN load as in the vehicle.

         7.3.6. Before the actual start of the test, a series of 20 cycles shall be completed so that the self‑tightening system settles properly.

         7.3.7. 1,000 cycles shall be completed at a frequency of 0.5 cycles per second, the total amplitude being 300 + 20 mm. The 5 daN load shall be applied only during the time corresponding to a shift of 100 + 20 mm for each half period.

         7.4. Conditioning of straps and breaking‑strength test (static)

         7.4.1. Conditioning of straps for the breaking‑strength test

          Samples cut from the strap referred to in paragraph 3.2.3. above shall be conditioned as follows:

         7.4.1.1. Temperature‑conditioning and hygrometrics

          The strap shall be conditioned in accordance with ISO 139 (2005), using the standard atmosphere or the standard alternative atmosphere. If the test is not carried out immediately after conditioning, the specimen shall be placed in a hermetically-closed receptacle until the test begins. The breaking load shall be determined within 5 minutes after removal of the strap from the