日韩高清无码不卡_凹凸午夜福利正品导航_天天传媒成人无码影视_国产精品白丝喷水在线_日本欧美性爱网一区_国产精东传媒丝袜二区_熟妇激情中文字幕_好色先生免费下载app_图区自拍亚洲小说_午夜一级毛片免费的网址

Noise meter is used to measure the noise of products in various environments, so as to effectively control the product feature during development and production.  Also ensure that the product noise or sound level are within the technical standards. Provide users with a reasonable and comfortable treatment environment.

Noise test for nebulizers: when the environmental noise is less than 40dB, connect the nebulizer bottle (without water) and switch on the unit. The nebulizer product and the noise meter shall be at the same surface and same height, the distance from the front of the nebulizer product  and noise meter shall be measured at 1 meter. If the noise figure meets the specification range, it is considered as a good product.

Noise test for thermometer:  keep the distance between the thermometer and noise meter at 10cm.  Check the beeper alarm volume after temperature measurement, if the volume ≧ 50dB, it complies the volume requirement.