KP8008 plastic smoke density meter
The instrument according to standard GB / 8323.2 2008 and ISO5659-2 "plastic smoke generated part 2 single room method determination of smoke density test methods specified in the technical conditions of the development of a new type of determination of smoke density test equipment, the standard is applicable to determination of plastic than the optical density of smoke generated during burning, and the biggest than optical density for test results. It is used to assess plastic smoke performance under prescribed conditions.
Meet GB8323.2-2008 "plastics - smoke generated - part 2: single chamber method determination of smoke density test method", ISO5659.2-2006 plastic - smoke generated in the second part: the optical density of single chamber method, testing standard.
The instrument by the airtight chamber, photometer measurement, radiation cone, combustion system, ignition system, test box, stents, thermometer of table and smoke density test software; Circuit by single chip microcomputer development, the technology content high, stable performance. This instrument is suitable for all plastic and other materials can be applied to the evaluation, such as rubber, textiles, covers, paint, wood and other materials), production of plastic industry, solid materials industry factory and scientific research test unit widely used.
A, test cases:
Fitted with Windows 1.1 the front door and can block the opaque mask of Windows activity.
1.2 square at the bottom of the box body is installed to prevent overpressure of blasting aluminium foil and the thickness is 0.04 mm, length is 405 mm, width 200 mm, total area of 81000 was composed of safe blasting, equipped with casing internal pressure regulation device.
1.3 light window: two? 75 mm light window, the light below the window equipped with 9 w ring electric heater, to ensure that the surface temperature of the optical window (oC 50 to 55 oC advisable) to minimize smoke density on the surface of the table, glazing window at the top of the test cases, test box in the light of the external window installed around 8 mm thick optical platform, optical platform to use? 15 mm can be connected to the fixed platform and test box fixed metal bar.
1.4 size: 914 MMX 914 MMX deep 610 mm wide
1.5 material: consists of three layers: the outer 1.5 mm thick steel plate, high temperature electrostatic bake rice white paint, the middle is composed of 60 mm thick layer of asbestos, inner USU304 1.2 mm thick stainless steel, high temperature electrostatic baked black paint, easy to clean.
1.6 air inlet, outlet, air inlet on the top of the test box, installation size for 65 mm Φ, controlled by electromagnetic valve with flange clearance and closed state; Vent at the bottom of the left, diameter for 80 mm Φ, controlled by electromagnetic valve with flange clearance and closed state, with suction fan.
2, photoelectric measuring system: power supply, photomultiplier tubes, enlarge pervious to light, brake light, filter, neutral, pervious to light, lens, optical system black box, light source, optical window of heater.
2.1, light source:
2.1.1, light source: provided by 6.5 V bulb, power supply transformer (6.5 V input and 220 V output), and a variable resistor.
2.1.2, installation: installed in the test section at the bottom of bulb opaque black case, by the light source, lens, optical window heater, optics [of window.
2.1.3, optical window and hold: AC220V power supply, resistance wire around 9 w, to ensure that the surface temperature of the optical window (oC) oC 50 to 55 is advisable.
2.1.4, convex lens: 51 mm in diameter, through the adjustment and calibration, fully formed a 51 mm diameter of the ring and there is no other light beam outside the ring.
2.1.5, optical window: consisting of unboarded pervious to light and the "black box.
2.2, photoelectric detector
2.2.1, photoelectric detector: by the photomultiplier tube, amplification, filter, brake light, filter, neutral filter, lens, optical window, etc.
2.2.2, photomultiplier tubes:
2.2.2.1, photomultiplier tubes, parameters: voltage: DC 1000 v, the power supply: 12 v input, 0 ~ 2 ma - 1200 - v
2.2.2.2, photoelectric system processes: photoelectric detector for photomultiplier tubes, and the A/D number template connection, through multistage amplifier microcomputer processing. Continuous measurements the corresponding optical density can change over time, light transmittance, 5 number for spectral response sensitivity, response is similar to the naked eye and dark current is lower than 0.001 uA. The photomultiplier tube, the minimum sensitivity can read light road 0.5 100% neutral filter and a ND - 2 amplification filter.
2.2.3, amplification, filter, ND - 2.0 light transmittance was 0.95%, A light source color temperature (K) = 2854.
2.2.4, brake light: for the shields, correction, 0% light transmittance.
2.2.5, filter: filter for compensation, the optical density of 0.1 ~ 1.0, and 1.0 a total of 11 pieces.
2.2.6, neutral filter: ND - 0.5, the 31.7% light transmittance, A light source color temperature (K) = 2854.
2.2.7, convex lens: the diameter is 51 mm, enables direct beam was focused in business is through plate between the up and down into a small spot.
(please see section 2.2.5 0.1 ~ 1.0 for the compensation filter)
2.2.7, calibration of optical system: using optical density is 3.0, the wavelength of the neutral filter detection of 550 ~ 650 nm.
2.2.8, optical window: consisting of unboarded pervious to light and the "black box.
