参考标准：EN166、EN168等等测试目的：主要测试镜片的抗粒破坏性能，要求将镜片以一定速度旋转（250±10r/min），与一定量的石英砂（3kg）发生摩擦，进而观察镜片的受损情况。测试方法：  1.将镜片固定于仪器内的吸盘上；  2.启动仪器，转动吸盘，使镜片以250±10r/min的速度旋转，将3kg石英砂从仪器顶部漏斗中倒入，使其慢慢漏完；  3.关掉电源，取下镜片，观察镜片受损状况。关键参数：1.导管长度：1650mm2.导管直径：120±3mm3.     试样座角度：45±1°4.     吸盘打转速度：250±10r/min5.     网眼：1.6mm6.电源：AC100~240V 50/60Hz7.尺寸:46×47×227 CM(长×宽×高）8.重量:55 Kg

Reference standard: EN166 and EN168 test purposes: the main test lenses particle damage resistance, require that the lens at a certain speed rotation (250   10 r/min), with a certain amount of quartz sand (3 kg) friction, and then observe the lens for damage.Test method: 1. Fix the lens to the suction cup in the instrument;2. Start the instrument and rotate the suction cup to make the lens rotate at a speed of 250 plus or minus 10r/min, and the 3kg quartz sand is poured from the top funnel of the instrument to drain it slowly.3. Turn off the power, remove the lens, and observe the damage of the lens.Key parameters: 1. The pipe length: 1650 was. Vessel diameter: 120   3 mm3. Sample seat Angle: 45   1 ° 4. Chuck is spinning speed: 250   10 r/min5. Mesh: 1.6 mm6. Power supply: 50/60 AC100 ~ 240 v hz7. Size: 46 * 47 * 227 CM (length x width x height) 8. Weight: 55 Kg