旧烟度卡的烟度值R_b与新烟度标准烟度值S_F之间的关系

Relation Between Smoke Intensity Values on Old and New Rated Smoke Cards.

目前我国已发布实施了一些新烟度排放、测量和仪器标准，并规定烟度符号采用ＳＦ，烟度单位为ＦＳＮ。但由于尚未发布实施新的标准烟度卡，而仍然使用旧的标准烟度卡（烟度值为Ｒｂ），因此给烟度测量造成了一定的误差。

Some new Standards regarding exhaust emission smoke,measurement and instruments have been put into practice currently in this countri Symbol of smoke intensity is stipulated to be S F and unit to be FSN.However,new rated smoke card has not yet become effective,and original rated smoke card,of which symbol of smoke intensity value stipulated to be R b is still used,a definite error is therefore caused in smoke measurement.The paper discourses relation between smoke intensity value R b on the old rated smoke card and smoke intensity value S F of the new one.