UL 9:2000 pdf download – Fire Tests of Window Assemblies.
3.3.5 The pressure-sensfrig probes are to be located within 6 inches (152 mm) of the vertical centerline of the furnace chamber,
3.3.5 ed April 12. 2005
33.6 The pressure at each location ts to be measured using a differential pressure instrument capable of reading in increments no greater than 0.01 inch water gauge (2.5 Pa) with an accuracy of ±0005 inch water gauge (±1.2 Pa) or better. The differential pressure measurement instrument is to be located so as to minimize stack effects caused by vertical runs of pressure tubing between the pressure—sensing probes and the differential pressure measurement instrument locations.
3.3.6 added April 12. 2005
3.3.7 Based on the vertical separation and pressure differences between the two pressure-sensing probes, a calculation of the zero pressure plane is to be made. The furnace pressure is to be positive above the zero pressure plane.
3.3.7 added April 12, 2005
3.3.8 For fire tests conducted under positive pressure conditions, the zero pressure plane is to be established such that at least two-thirds of the height of the window assembly is located above the zero pressure plane.
3.3.8 added AprIl 12. 2005
3.3.9 For fire tests conducted under neutral pressure conditions, the zero pressure plane is to be established such that it is located within ±1 inch (±6 mm) of the top of the window assembly.
3.3.9 added April 12, 2005
4 Test Assemblies
4.1 ConstructIon and size
4.1.1 The design, construction, material, workmanship, and hardware of the test assembly is to be representative of the construction under evaluation. A record of materials and construction details adequate for identification is to be made.
4.1.1 revised April 12, 2005
4.1.2 The area of the test assembly is not to be less than 100 square feet (9.29 rn2) with neither dimension less than 9 feet (2.7 m).
4.1.3 If the conditions of use limit the construction to smaller dimensions, a proportionate reduction may be made in the dimensions of the test assembly for tests qualifying them for such restricted use.
4.2 MountIng
4.2.1 The test assembly is to be installed in the wall or partition construction in the manner in which it is to be used. It is to be mounted so that the latches and fasteners other than hinges will be on the unexposed side, and the mounting is not to prevent the tree and easy operation of all operable components such as ventilators and sash.
4.2.2 The wall or partition is to be constructed of masonry or other matenals representative of the wall or partition construction. Window frame wall anchors, when used. are to be suitable for the wall or partition constructed
5 Conduct of Tests
5.1 General
5.1.1 The wall or partition is to have sufficient strength at the time of the test to retain the assembly securely in position throughout the fire and hose stream test.
5.1A Heat flux
5.1A.1 The radiative heat flux transmitted through the test assembly is to be measured when requested by the test sponsor. The flux measurements are to be recorded at least once every minute.
5.IA.1 added AprI 12. 2005
5.IA.2 The radiative heat flux is to be measured by an instrument capable of measuring radiant heat flow having a range of 0 to 50 kW/rn2 with an accuracy of ±5% of the maximum range. The response time of the instrument is to be such that the instrument Is capable of recording 64% of the maximum range within 10 seconds. The view angle of the instrument is to be 180 ±5
5.IA.2 added April 12, 2005
5.IA.3 The radiative heat flux is to be measured in a plane parallel, and at a distance of 39 ±3/8 inches (1.0 ±0.01 m) from the unexposed surface of the test assembly.
5.IA.3 added AprIl 12, 2005
5.1 B Unexposed surface temperatures
5.1B.1 The temperatures on the unexposed surface of the glazing materials are to be measured when requested by the test sponsor The temperature measurements are to be recorded at least once every minute.
518.1 added April 12, 2005
5.1B,2 When measured, the temperatures are to be measured with thermocouples with a wire diameter of not more than 0.03 inch (0.7 mm). Each thermocouple is to be brazed to the center of the face of a copper disk 1f2 inch (12 mm) in diameter and 0.01 inch (0.2 mm) thick, which is secured to the surface of the specimen at the required position. The thermocouples are to be placed under flexible, oven-dry, felted pads. The properties of these pads are to comply with the requirements specified in Appendix B, Requirements for Thermocouple Pads.