Brief introduction: Building smoke density tester, rohm and haas company by the United States for the research and development of internal control, the early 70 s in last century have developed according to the United States ASTM D2843 standards, its theoretical basis for the bill Bob's law, a direct hit by flame sample, material after the burning gas, by keep out light transmittance and identifying gas smoke density values (SDR. But due to its history is too long, the test method on some design concept has been unable to keep up with the modern electronic measurement technology, so the mo emperor in the standards development at the same time, the test instrument for the bold innovation, under the condition of without changing the test data accuracy, better show the modern testing technology and mechanism, can be better for the general testing institutions or enterprises to use. Technical features: 1, double test box adopts teflon as the coating on the material release of the burning of flue gas, the test case has a great corrosive, it is only through put corrosion processing test box, can guarantee its service life; 2, install white at the bottom of the scarlet letter "EXIT" font, testers through a transparent observation window, can distinguish clear sample after then and fuzzy state; 3, test for incandescent lamp with light source, photoelectric sensor for silicon photodiode, silicon photodiode has cosine calibration function, at the same time equipped with color filter, filter out ultraviolet light and infrared light, the human eye can't identify the human eye has excellent compatibility; 4, the main burner is 256 kpa pressure, flame shock, to test specimen, equipped with auxiliary burner, impact of the drip flame; 5, standards, testing software can not only show every 15 s light transmittance value, can draw the transmittance test curve at the same time, at the end of the test, the software can display the SDR smoke density value, the flue gas numerical integrals; 6, pass the test software, can be of three groups of test sample test report to carry on the synthesis, draw a SDR development of smoke density curve 7, you can use the computer software, SDR comparison at the same time, the result of the three groups of test automatically recognize whether can meet the needs of the test results 8, through a computer can connect the data output, printing and print test reports, making it easy for users to use
Brief introduction: Building smoke density tester, rohm and haas company by the United States for the research and development of internal control, the early 70 s in last century have developed according to the United States ASTM D2843 standards, its theoretical basis for the bill Bob's law, a direct hit by flame sample, material after the burning gas, by keep out light transmittance and identifying gas smoke density values (SDR
