Appendix 4
United Kingdom
Specifications of the test mixture for testing the windscreen wiper and washer systems
1.
The test mixture referred to in paragraph 2.1.9. of Annex III shall consist of the following:
- 1.1.
Water, with a hardness of less than 205 mg/l (Ca): 92,5 % by volume.
- 1.2.
Aqueous saturated salt (sodium chloride), solution: 5,0 % by volume.
- 1.3.
Dust, in accordance with the specifications of paragraph 1.3.1. to 1.3.2.6. below: 2,5 % by volume.
1.3.1.
Specifications of the test dust analysis
- 1.3.1.1.
68 ± 1 % SiO2 by mass
- 1.3.1.2.
4 ± 1 % Fe2O3 by mass
- 1.3.1.3.
16 ± 1 % Al2O3 by mass
- 1.3.1.4.
3 ± 1 % CaO by mass
- 1.3.1.5.
1,0 ± 0,5 % MgO by mass
- 1.3.1.6.
4 ± 1 % Alkalis by mass
- 1.3.1.7.
2,5 ± 0,5 % Ignition loss by mass
1.3.2.
Specifications of the particle-size distribution in course-grade dust
- 1.3.2.1.
12 ± 2 % of 0 to 5 μm particle-size
- 1.3.2.2.
12 ± 3 % of 5 to 10 μm particle-size
- 1.3.2.3.
14 ± 3 % of 10 to 20 μm particle-size
- 1.3.2.4.
23 ± 3 % of 20 to 40 μm particle-size
- 1.3.2.5.
30 ± 3 % of 40 to 80 μm particle-size
- 1.3.2.6.
9 ± 3 % of 80 to 200 μm particle-size