氣(qi)(qi)體(ti)檢(jian)測儀(yi)出廠前需要(yao)先用(yong)(yong)一(yi)個(ge)零點(dian)標(biao)(biao)氣(qi)(qi)和(he)幾(ji)個(ge)標(biao)(biao)準(zhun)(zhun)(zhun)濃(nong)度的氣(qi)(qi)體(ti)對(dui)儀(yi)器(qi)(qi)(qi)(qi)進(jin)(jin)行(xing)標(biao)(biao)定，得(de)到標(biao)(biao)準(zhun)(zhun)(zhun)曲線儲(chu)存于儀(yi)器(qi)(qi)(qi)(qi)之(zhi)中，測定時(shi)，儀(yi)器(qi)(qi)(qi)(qi)將待(dai)測氣(qi)(qi)體(ti)濃(nong)度產生的電(dian)信號同(tong)標(biao)(biao)準(zhun)(zhun)(zhun)濃(nong)度的電(dian)信號進(jin)(jin)行(xing)比較，計算得(de)到準(zhun)(zhun)(zhun)確的氣(qi)(qi)體(ti)濃(nong)度值。因此，隨(sui)時(shi)對(dui)儀(yi)器(qi)(qi)(qi)(qi)進(jin)(jin)行(xing)校(xiao)零，經常性(xing)對(dui)儀(yi)器(qi)(qi)(qi)(qi)進(jin)(jin)行(xing)校(xiao)準(zhun)(zhun)(zhun)都是(shi)保證(zheng)儀(yi)器(qi)(qi)(qi)(qi)測量準(zhun)(zhun)(zhun)確的必不(bu)可(ke)少的工作。需要(yao)說明的是(shi)：氣(qi)(qi)體(ti)檢(jian)測儀(yi)都是(shi)可(ke)以(yi)更換(huan)檢(jian)測傳(chuan)感(gan)器(qi)(qi)(qi)(qi)的，但是(shi)，這并不(bu)意味著一(yi)個(ge)檢(jian)測儀(yi)可(ke)以(yi)隨(sui)時(shi)配用(yong)(yong)不(bu)同(tong)的傳(chuan)感(gan)器(qi)(qi)(qi)(qi)。在更換(huan)探(tan)頭時(shi)除了(le)需要(yao)一(yi)定的傳(chuan)感(gan)器(qi)(qi)(qi)(qi)活化時(shi)間外，還必須對(dui)儀(yi)器(qi)(qi)(qi)(qi)進(jin)(jin)行(xing)重(zhong)新(xin)校(xiao)準(zhun)(zhun)(zhun)。另外，建議在各類儀(yi)器(qi)(qi)(qi)(qi)在使用(yong)(yong)之(zhi)前，對(dui)儀(yi)器(qi)(qi)(qi)(qi)用(yong)(yong)標(biao)(biao)氣(qi)(qi)進(jin)(jin)行(xing)響(xiang)應檢(jian)測，以(yi)保證(zheng)儀(yi)器(qi)(qi)(qi)(qi)真正起(qi)到保護的作用(yong)(yong)。