Document ID: chunk:federal_register_of_legislation:F2019C00042:front:0:p28
Version: federal_register_of_legislation:F2019C00042
Segment Type: other
Provision Reference: 
Character Range: 77250–80129

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 conditioning atmosphere or from the receptacle.

         7.4.1.2. Light‑conditioning

         7.4.1.2.1. The provisions of Recommendation ISO 105-B02 (1994 / Amd2:2000) shall apply. The strap shall be exposed to light for the time necessary to produce a contrast equal to Grade 4 on the grey scale on Standard Blue Dye No. 7.

         7.4.1.2.2. After exposure the strap shall be conditioned as described under paragraph 7.4.1.1. 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 five minutes after removal of the strap from the conditioning installation.

         7.4.1.3. Cold‑conditioning

         7.4.1.3.1. The strap shall be conditioned as described under paragraph 7.4.1.1.

         7.4.1.3.2. The strap shall then be kept for one and a half hours on a plane surface in a low‑temperature chamber in which the air temperature is -30 + 5 °C. It shall then be folded and the fold shall be loaded with a mass of 2 kg previously cooled to
         -30 + 5 °C. When the strap has been kept under load for 30 minutes in the same low‑temperature chamber, the mass shall be removed and the breaking load shall be measured within 5 minutes 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 (7.3.) shows that the strap slips by less than half the prescribed value, in which case, the procedure 1 abrasion conditioning (7.4.1.6.4.1.) will not be necessary. The setting on the conditioning device will approximately maintain the relative position of