GBT39841-2021 超聲波燃氣表Ultrasonic gas meters測試灰塵

GBT39841抗污染物性能測試

 EN14236污染物

灰塵的規格

試驗采用 4 組不同尺寸的灰塵,每組中 95%的灰塵顆粒大小在下列相應尺寸范圍內

a) 0um~100 um;平均大小( 50士10)um;

b) 100 um~200 um;平均大小(150 士10) um;

c)200 um~300um;平均大小(250士10)um;

d) 300pm~400um;平均大小(350士10)um。

上述每一組灰塵的質量成分應是:

四氧化三鐵(Fe304) 79%;

三氧化二鐵(Fe203) 12%;

二氧化硅(Si0) 8%;

一油漆殘片 1%

EN 14236:2007(E)

Specification of contamination dust

Four separate batches of dust shall be used with 95 % of the particles in each batch in the appropriate size range given below:

a)0 um to 100 um Average size (50士10) um;

b) 100 um to 200 um Average size (150士10) um;

c) 200 um to 300 um Average size (250 士10) um;

d) 300 um to 400 um Average size (350士 10) um.

Each of the above batches shall have a composition by mass of:

Black iron oxide(Fe3O4) 79 %

Red iron oxide (Fe2O3) 12 %

Mineral silica flour (SiO) 8%

Paint residual flake 1%