BS 6863:1989
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Hardcopy , PDF
15-06-1997
English
28-02-1990
Foreword
Committees responsible
Specification
1 Scope
2 Definitions
3 Materials
4 Construction
5 Performance
6 Marking
7 Information to users and labelling
Appendices
A Recommendation on minimum radii for thermoplastics
materials
B Shock absorption test
C Conditioning before testing
D Test for strength of retention system
E Test for effectiveness of retention system
F Test for resistance to abrasion of the chin strap
G Test for durability of quick-release mechanism
H Test for attenuation of hearing
Table
1 Location of hearing axis
Figures
1 Field of vision and reference points
2 Apparatus for testing shock absorption
3 Apparatus for testing retention system strength
4 Modified headform for testing retention system
effectiveness
5 Apparatus for testing retention system effectiveness
6 Apparatus for testing abrasion of the chin strap
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