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此种计测仪可用来计测矿工在地下作业中有可能吸入的某种可呼吸粉尘.正如附图所示,该计测仪系安装在矿工的头灯和蓄电池箱上.SIMPEDS70型计测仪是在以前研制的同样的SIMPEDS型粉尘计测仪的基础上改进的.经过改进的这种计测仪容易制造和维护.它的重量为0.6～0.7公斤,主体部分系装在蓄电池箱的上部.头灯上所安装的旋风集尘器是用聚碳酸酯作的.含粉尘的空气是借助吸尘泵以1.85毫升/分的比例从旋风集尘器的侧部吸入的.可呼吸粉通过旋风集尘器便堆积在滤尘网上.另一方面,粗粒粉尘则降落在旋风集尘器的底部.吸尘泵马达的转数系由记数器加以记录.假如测定滤尘网上堆积的粉尘的重量,就可以求出吸入的空气量与粉尘浓度之比.
This kind of measuring instrument can be used to measure the miners in underground operations may inhale some kind of breathable dust.As shown in the figure, the meter installed in the miner’s headlamps and battery boxes.SIMPEDS70 type measurement The instrument was developed on the same SIMPEDS-based dust tester previously developed, which is easy to manufacture and maintain and has a weight of 0.6 to 0.7 kg and a main part housed in a battery case Top The cyclone mounted on the headlamp is made of polycarbonate and the dusty air is drawn in from the side of the cyclone by means of a vacuum pump at a rate of 1.85 ml / min. Through the cyclone dust will accumulate in the filter. On the other hand, the coarse dust landed on the bottom of the cyclone dust collector. The number of revolutions of the suction pump motor is recorded by the register. If the dust on the filter Of the weight, you can find the amount of inhaled air and dust concentration ratio.