| 摘要 |
PROBLEM TO BE SOLVED: To provide a measurement device for measuring an air flow and draft resistance, which has high versatility supporting various ranges of air flow rate.SOLUTION: Provided is a measurement device for measuring an air flow and draft resistance and equipped with a casing 10 in which a ventilation flue 4 is formed. The ventilation flue 4 is provided with: a flow-rectifying grid 14 for rectifying air; a first chamber 15 for taking in air having passed through the flow-rectifying grid 14; an aperture plate 16 in which an opening is formed which air taken in by the first chamber 15 can pass through; and a second chamber 17 for taking in air having passed through the opening of the aperture plate 16. The casing 10 has a specific opening 10f formed therein in which a hole is opened in a side face of the ventilation flue 4 in order to make the aperture plate 16 replaceable, and is provided with an opening/closing unit 13 capable of opening and closing the specific opening 10f.SELECTED DRAWING: Figure 3 |
