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BS 7920:1998
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Specification for luminance meters
Hardcopy , PDF
28-01-2005
English
15-08-1998
Committees responsible
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Classification
5 Digital ranges and readouts
6 Analogue scales
7 Calibration and testing temperature
8 Power supply
9 Performance requirements for laboratory and field
luminance meters
10 Marking
Annex A (informative) Guidance on choice of meter range
Annex B (normative) Calibration
Annex C (normative) Test methods
Bibliography
Figure 1 Diagram showing characteristic ray paths in luminance
meter
Figure C.1 Co-ordinates for calculation of the directional
response function f2
Figure C.2 Diagram showing gloss traps for determining
surrounding field error
Table 1 Test and calibration methods
Table 2 Error tolerances for luminance meters
Table C.1 Example of calculation of correction factor for
high pressure sodium lamp
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