ISO TS 5660-5-2020 pdf download.Reaction-to-fire tests一Heat release, smoke production and mass loss rate – Part 5: Heat release rate [cone calorimeter method) and smoke production rate (dynamic measurement) under reduced oxygen atmospheres.
6.1 General
The cnnlc.al shaped radiant heater described in ISO 5660.1:2015.6.1 shall be integrated into the top face of an enclosure described in in (ui. The cabinet shall also indude the radiation shield (1505660-1:2015, 6.3), the weighing device (ISO 5660-1:2015,6.4) with an additional cooling shield as described in 6.3, the specimen holder (ISO 5660-1:2015, 6.5). and the ignition circuit (ISO 5660-1:2015. 6.9). The heat flux meter and housing (ISO 566O1:201S. 6.12) and the calibration burner (ISO 5660•1:2015, 6.13) shall be provIded .is well, Appropriate mountings shall be available to perform calibration Ineasulelnents using the heat flux meter and calibration inside the e dosurs. A gas mixing and supply system shall be connected to the enclosure to allow adjusting the atmospheflc conditions.
6.2 Heater and enclosure and chimney arrangement with cone calorimeter as per
ISO S660.1
The test enclosure described in 6.3 replaces the standard cone heater assembly in the ISO 5660.1 apparatus. It shall be centred underneath the exhaust hood and can be used in each of the following configurations using a chimney on top of the enclosure as descnbed in 6.5.
1) When testing with an enclosure gas supply rate lower than the exhaust flow rate the enclosure and chimney should not be linked directly to the exhaust hood. Air from the surroundings shall be allowed to enter the exhaust hood.
NOTE I Thu effect of the chimney in the unlinked ccsirlguraekm on various renlts are discussed in Reference 121
NOTE 2 An exhaust flow Idle that exceeds ib. rnclosur# supy r41r would cause udrr pressure. leakages. and ps*entially uncontrolled conditions Is the enclosure.
2) When undertaking anaerobic pyrolysis experiments these can be carrwd ou in either unlinked or linked apparatus depending on the applicable gas supply rate or It the enclosure is staiid•alone without the oxygen depletion measurement equipment runiiing Annes C specifies more details about the stand-alone arrangement.
Regardless of the configuration or the enclosure Inlet gas low rate, the exhaust flow rate in the duct shall be suffinently high to reliably entrain all rombustion/pyrolysis products released during the process. The minimum exhaust flow rate at the beginning of the test shall he at least 0,012* 0.002 m3/s.
62.1 Enclosure
A stainless steel enchisure shall have internal dimensions ol W s I) II (370 * 20) mm
(300 * 20) mm (320 * 20) mm. A door shall be mounted on the front of the enclosure to provide access to all Inner parts and to allow specimen loading. When opened for specimen loading, a door may allow significant amounts of air entering the enclosure. This may unintentionally change the predetermined controlled atmosphere. An alternative opening scheme may be used lilt allows only minimum air entering the enclosure dunng specimen loading. At least one wall or door element shall contain a window to allow the specimen to be observed duringa teSt. At least one gas connection port shall be mounted at the level of the sample that allows gas sampling of the endosure atmosphere. Additional ports may be present for cooling water entry, additional gas sampling, and/or temperature measurement as well as extinguishing, and radiation measurement equipment.
All connections of wall assemblies, ports and openings shall be tightly sealed to prevent surrounding air from penetrating in the enclosure during the test.
The Lonical heater, specified In ISO 5660’1:2015. 6,1 shall be mounted in the centre of the top face ofthc enclosure, It shall be capable of producing an irradiance Level on the surface olthe specimen of 0kW m2 to SO kW m2. Higher heat flux levels maybe possible if the equipment is suitable br high temperature conditions. A water-cooled collar should be mounted between the heater and the lop of the enclosure to minimize warping of the top plate due to the hot electrical heater. l*el resistant sealing material shall be used for sealing the cone heater openings against unintended air diffusion/penetration into the enclosure.ISO TS 5660-5 pdf download.