BS EN 171:2002
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
06-06-2022
English
05-13-2002
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Designation and identification
5 Requirements
5.1 General
5.2 Transmittance requirements
5.3 Oculars with enhanced colour recognition (optional)
5.4 Oculars with enhanced reflectance in the infrared (optional)
Annex A (normative) Relative visual attenuation quotient for
signal light recognition
A.1 Definition of relative visual attenuation quotient for
signal light recognition
A.2 Spectral functions for the calculation of luminous
transmittance and relative visual attenuation quotients
Annex B (informative) Guidance on selection and use
B.1 General
B.2 Filters with enhanced colour recognition
8.3 Filters with enhanced reflectance in the infrared
Annex C (informative) Uncertainty of measurement and results
interpretation
C.1 Test report and uncertainty of measurement
Annex ZA (informative) Clauses of this European Standard addressing
essential requirements or other provisions of EU Directives
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