UL94 Vertical Horizontal burning tester
Combustion characteristics UL horizontal and vertical burning tester for testing and evaluation of plastic materials, is the United States UL94 standard "equipment and appliances parts with plastic material flammability test" designed and manufactured in accordance with the relevant provisions of the plastic parts of the equipment and appliances horizontal vertical flammability test. The device uses the original imported key components and equipped with a gas flow meter, adjust the flame size, using the motor drive mode, simple and safe operation; accurate, remote split timing, elegant appearance, etc., all the technical indicators UL94 standard regulations.
1 venting capacity requirements : ≥ 0.5 cubic meters ( recommended observed with glass doors , to be actually reached 0.7 m3 ) Note 1 : When the combustion test , to ensure adequate oxygen is very important if this method . when the extension of the combustion test time , the size of the hood is less than 1m3 accurate test results can not be obtained .
2 sealed box put a plane mirror : Helps observed after the test , as the case
3 burner dimensions : length 100 ± 10mm, inner diameter of 9.5 ± 0.3mm, comply with ASTM D 5025
4 Timer accuracy :. 0.1S
5 source gas : methane gas heat of technical grade ( 98% minimum purity ) supply means and a flow meter with adjusting means in order to ensure uniform gas flow of natural gas close to delete 37 ± 1MJ / m 3 Requirements
6 processing temperature and humidity chamber ( box ) : the temperature can be maintained at 23 ± 2 ° C, relative humidity 50 ± 5%.
7 micrometer : 0.01mm accuracy can be read
8 layers of cotton : 100% absorbent cotton
9 drier : containing anhydrous calcium chloride or other desiccant dryer , keep the temperature 23 ± 2 ° C relative humidity below 20%
10 deal with the oven temperature and humidity : full-draft circulating -air oven , at least five times per hour ventilation can be maintained at 70 ± 2 ° C ( the old version 70 ± 1 ° C)
11 gauge : water pressure can be measured to 200mm , 5mm pressure increment
12 meter : one according to ASTM D 3159: rotameter calibrated flowmeter calibration beads , and with a correlation curve for the gas , or ± 2% accuracy of the mass flow meter (UL laboratory recommended quality. gas flowmeter )
