熔融滴落试验仪

                                             熔融滴落试验仪
熔融滴落试验仪应用于汽车内部设备所用材料的燃烧性能的测定。将试样水平放在格栅式试品架上，利用500w电热器对其辐射加热，观察融化的试样滴落物落到下面的收集盘上后，与收集盘中的棉花接触后是否燃烧，以及棉花是否燃烧，从而判断材料的可燃性。
wazau的熔融滴落试验仪参考标准95/28/eg
combustion behavior of materials in compliance with the europeanguideline
appendix v 95/28/eg
1.principle
a sample is placed in a horizontal position and exposed to anelectrical heater. under the sample there is a box to collectdrops.
inside the box there is some cotton to detect if the drops areburning.
the heating source is a heater having a power of 500 watts. thearea exposed to radiation consists of a transparent quartz plate ofan diameter of 100 mm
2.calibration
a heating flux measuring device （radiometer） of the gardon foiltype with a measuring range of at least 10 w/ cm2 is used forcalibration.
the calibration of the heating flux measuring device has to becalibrated by a reference heating flux measuring device everytimethe heater has to be calibrated. the reference heating fluxmeasuring device has to be re-calibrated according a nationalstandard.
3.calibration check
the radiation density caused by the the energy impact, which hasaccording to the calibration a radiation density of 3 w/cm2, has tobe controlled often. at least once every 50 hours of operation. thedevice has to be calibrated again if the measured values havechanged more than
0.06 w/cm2.
4.procedure of calibration
the device has to be placed at a draught safe spot. the airvelocity must not higher than 0.2 m/s. the heating flux device hasto be inserted into the test rig instead of the sample. the blackplate of the heating flux device must be located in the middle ofthe heater.
then the power is turn on using the potentiometer power regulatoruntil the radiation density is 3 w/cm2 in the center of the heatersurface. after the potentiometer was adjusted to provide the value3 w/cm2 the potentiometer should not be re-adjusted for 5 minutesto stabilize it.
5.sample
the sample must have the dimensions 70 mm x 70 mm.
if possible the samples should be production as the ready product.if the product is thicker than 13 mm its thickness has to bereduced to 13 mm at the side opposite to the side seen by thepassengers. if this is not possible the test must be conducted incompliance with a technical service with the sample having theregular thickness. this, however, must be stated in the report.composite materials are to be tested as homogeneous materials.
in case of materials consisting of different layers, not classifiedas component materials, all layers of a thickness up to 13 mm haveto be tested on the side exposed to the interieur of a vehicle. thetotal mass of the sample must be at least 2 g. if the mass is belowthat a sufficient number of samples have to be added.
if both sides of the sample are different, each side has to betestesd, resulting in a test of eight samples.
before the test the samples and the cotton have to be conditionedat a temperature of 23 ℃
6. doing the calibration
1）  remove the sample holder.
2）  mount the calibration ring.
3）  connect the sensor to te amplifier.
4）  regulate the energy using the power regulatorpotentiometer.

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奥德赛创精密仪器有限公司
伍龙云
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沙井镇南环路闳晖科技园旁华丰高新产业园I座4楼

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