BS ISO 17449:2015 pdf download – Road vehicles — Safety glazing materials — Test methods for properties of electrically heated glazing.
1 Scope This International Standard provides the test methods and acceptance criteria for circuit continuity and heating power, driving visibility, electrical attachment bond performance, electrical attachment bending performance, hot spot identification and heating uniformity, defrosting efficiency, high voltage durability, low temperature performance and long term humidity durability, for all electrically heated safety glazing materials in a road vehicle. This International Standard provides test protocols for the static performance of an electrically heated glazing material; it is not representative of in-vehicle performance. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3538, Road vehicles — Safety glazing materials — Test methods for optical properties IEC 60051–2, Direct acting indicating analogue electrical measuring instruments and their accessories, Part 2 — Special requirements for ammeters and voltmeters 3? Terms? and? definitions For the purpose of this document, the following terms and definitions apply. 3.1 heating evaluation area for Type 1 (3.7), represented by an area formed by outermost conductors at an extended distance of 20 mm wider than the bus bars (along the edges) and extended to 50 mm on both the top and bottom, in the absence of specific requirements and for a glazing equipped with heating circuits formed by evenly distanced conductive lines and bus bars near to the glass edges Note 1 to entry: If the extended distance is over the edge of the glass, then take the glass edge as the border of evaluation area.
7 Requirements 7.1 Circuit continuity and heating power 7.1.1 Purpose of test The purpose of this test is to determine whether the heating system circuit has the correct continuity between elements and heating power conforms to the product specification. 7.1.2 Apparatus 7.1.2.1 Variable direct current (DC) power supply, rated at a minimum of two times the voltage and two times the current specified for the parts to be tested. 7.1.2.2 Voltage meter, conforming to IEC 60051-2, with an Accuracy Class of 1. 7.1.2.3 Ampere meter, conforming to IEC 60051-2, with an Accuracy Class of 1. 7.1.2.4 Heat sensitive paper. 7.1.2.5 Projector, conforming to ISO 3538. 7.1.2.6 Thermal camera, with range of 0 °C to 100 °C, accuracy of ±0,5 °C, capable of measuring and recording surface of the tested area with a spatial resolution of 2 mm. The thermal camera emissivity can be adjusted to a level appropriate to glass substrate.