Document ID: chunk:federal_register_of_legislation:F2019L00026:front:0:p30
Version: federal_register_of_legislation:F2019L00026
Segment Type: other
Provision Reference: 
Character Range: 84204–87352

after removal of the strap from the low-temperature chamber.
              7.4.1.4. Heat-conditioning
              7.4.1.4.1. The strap shall be kept for three hours in a heating cabinet in an atmosphere having a temperature of 60 ± 5 °C and a relative humidity of 65 ± 5 per cent.
              7.4.1.4.2. The breaking load shall be determined within five minutes after removal of the strap from the heating cabinet.
              7.4.1.5. Exposure to water
              7.4.1.5.1. The strap shall be kept fully immersed for three hours in distilled water, at a temperature of 20 ± 5 °C, to which a trace of a wetting agent has been added. Any wetting agent suitable for the fibre under test may be used.
              7.4.1.5.2. The breaking load shall be determined within 10 minutes after removal of the strap from the water.
              7.4.1.6. Abrasion conditioning
              7.4.1.6.1. The abrasion conditioning will be performed on every device in which the strap is in contact with a rigid part of the belt, with the exception of all adjusting devices where the micro-slip test (paragraph 7.3.) shows that the strap slips by less than half the prescribed value, in which case, the procedure 1 abrasion conditioning (paragraph 7.4.1.6.4.1.) will not be necessary. The setting on the conditioning device will approximately maintain the relative position of strap and contact area.
              7.4.1.6.2. The samples shall be conditioned as described under paragraph 7.4.1.1. The ambient temperature during the abrasion procedure shall be between 15
              and 30 ºC.
              7.4.1.6.3. In the table below are listed the general conditions for each abrasion procedure.
                                     Load    Frequency  Cycles   Shift
                                     daN     Hz         numbers  mm
Procedure 1                          2.5     0.5        5,000    300 ± 20
Procedure 2                          0.5     0.5        45,000   300 ± 20
Procedure 3*                         0 to 5  0.5        45,000   -
*  See paragraph 7.4.1.6.4.3. below

               The shift given in the fifth column of this table represents the amplitude of a back and forth motion applied to the strap.
              7.4.1.6.4. Particular conditioning procedures
              7.4.1.6.4.1. Procedure 1: for cases where the strap slides through an adjusting device.
               A vertical steady load of 2.5 daN shall be maintained on one end of the strap ‑ the other end of the strap shall be attached to a device giving the strap a horizontal back and forth motion.
               The adjusting device shall be placed on the horizontal strap so that the strap remains under tension (see Annex 11, Figure 1, to this Regulation).
              7.4.1.6.4.2. Procedure 2: for cases where the strap changes direction in passing through a rigid part.
               During this test, the angles of the straps shall be maintained as shown in Annex 11, Figure 2, to this Regulation.
               The steady load of 0.5 daN shall be maintained during the test.
               For cases where the strap changes direction more