旧标准烟度卡烟度值Rb与新标准烟度值SF之间的关系

目前我国已发布实验一些新的烟度排放，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，论述了旧标准烟度卡烟度值Ｒｂ与新烟度标准烟度值ＳＦ之间的关系。

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

Some new standards regarding exhaust emission smoke,measurement and instruments have been put into practice currently in this country.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.