簡要描述：儀(yi)器采用(yong)(yong)(yong)(yong)介電(dian)常數法(fa)原理測定(ding)(ding)(ding)(ding)汽(qi)車(che)用(yong)(yong)(yong)(yong)汽(qi)油辛(xin)烷(wan)值，即運行理數統計方(fang)法(fa)對(dui)大(da)量試驗數據盡心出(chu)力(li)得(de)到汽(qi)車(che)用(yong)(yong)(yong)(yong)汽(qi)油介電(dian)常數與其(qi)辛(xin)烷(wan)值的(de)相關關系(xi)，從而通過測定(ding)(ding)(ding)(ding)汽(qi)車(che)用(yong)(yong)(yong)(yong)汽(qi)油的(de)介電(dian)常數，確定(ding)(ding)(ding)(ding)其(qi)辛(xin)烷(wan)值。儀(yi)器設有掃描(miao)測定(ding)(ding)(ding)(ding)檔位和(he)分段(duan)測定(ding)(ding)(ding)(ding)檔位(依據國家標準中的(de)車(che)用(yong)(yong)(yong)(yong)汽(qi)油牌號劃(hua)分)，經標定(ding)(ding)(ding)(ding)和(he)校(xiao)準后(hou)，可直接測法(fa)定(ding)(ding)(ding)(ding)汽(qi)車(che)用(yong)(yong)(yong)(yong)汽(qi)油辛(xin)烷(wan)值，用(yong)(yong)(yong)(yong)研究(jiu)法(fa)辛(xin)烷(wan)值(RON)表示。