| 摘要 |
PURPOSE:To obtain availability for control over a dust respirator and health control and to ensure the precision of an inspection result, by sorting and measuring particulates of the same specific sizes by respective detectors, and comparing the amounts of fine particles measured by both detectors with each other. CONSTITUTION:Suction pumps incorporated in an upstream-side detector 11 and a downstream-side detector 13 are put in operation and the suction is carried on while both suction pumps are set to an equal suction speed; and both detectors 11 and 13 are set to the same measured particle size selection range, and then an arithmetic processing mechanism 14 calculates the sensitivity difference between the detectors 11 and 13 and the flow passage condition as blank values. Both numerals counted by both detectors 11 and 13 are compared with each other by the arithmetic processing mechanism 14. While the blank values are corrected, the percentage of the counted value of fine particles by the downstream detector 13 to that by the upstream detector 11 is displayed digitrally on a display device 15, obtaining the result of a performance test of a filter material 1. |
