The ISO 17398 standard, developed by the International Organization for Standardization (ISO), specifies the requirements for a performance-related classification system for safety signs according to the expected service environment, base materials, photometric properties, lighting means, fixing methods and surface.
Performance criteria and test methods are set out in this International Standard so that properties related to durability and expected service life can be characterized and specified at the time of delivery of the product to the buyer.
This International Standard does not cover electrical power supplies, their components or electrically powered elements. It also does not cover properties of illuminant components, but photometric properties are included for certain types of safety signs.
This International Standard has been prepared to provide manufacturers/suppliers and buyers with the tools to agree on and set performance parameters for safety signs. agreed upon for each safety sign.
performance parameters will be maintained throughout the expected service life of that product.
This International Standard requires manufacturers/suppliers to classify products and provide comprehensive product definitions. Both the manufacturer/supplier and the buyer have the ability to determine product requirements in terms of performance levels and, where appropriate, the expected service environment.
Consistent use of this International Standard will assist in improving knowledge of stated requirements and a better understanding of the performance of various types of safety signs in everyday use.
For safety signs intended to be illuminated internally, the product description should include the specific temperature service conditions to which the safety sign may be subjected resulting from light sources and any special requirements of the illumination source that may affect the colorimetric and photometric properties.
For phosphorescent safety signs, manufacturers/suppliers must provide a description of the gloss reduction performance. The minimum information provided will be the different illumination levels identified and the photopic luminance degradation characteristics from light sources. Where required by agreement between the manufacturer/supplier and purchaser, or for optional performance definition requirements or to characterize safety signs and safety road guide components for use as described in ISO16069, the product description shall indicate that the luminance is 3 mcd/m2' when tested under excitation conditions, respectively. It includes the time it took for it to decrease to 2 mcd/m2.
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