Description
This part of SZNS 044 specifies requirements for the construction and performance of internally illuminated box type safety signs that are intended for use at ambient temperatures between 10° C and 40° C. Such signs are illuminated by one or two separate systems of electric lighting.
TABLE OF CONTENTS
| Contents | Page |
| 1 Scope | 1 |
| 2 Normative references | 1 |
| 3 Definitions | 1 |
| 4 Requirements | 1 |
| 4.1Classification | 1 |
| 4.2 Design and construction | 2 |
| 4.3 Performance | 4 |
| 5 Inspection and methods of test | 5 |
| 5.1 Inspection | 5 |
| 5.2 Test for level of uniformity of luminance | 6 |
| 5.3 Resistance to salt fog | 7 |
| 5.4 Colour, luminance factor and luminance ratio tests | 7 |
| 6 Marking | 7 |
| Annex A Notes to purchasers | 8 |
| Annex B Quality verification of internally illuminated safety signs | 9 |
| Bibliography | 10 |