皮帶(dai)秤(cheng)(cheng)(cheng)(cheng)(cheng)實物(wu)校(xiao)(xiao)驗(yan)裝置的核心是(shi)料(liao)斗(dou)秤(cheng)(cheng)(cheng)(cheng)(cheng)。實物(wu)校(xiao)(xiao)驗(yan)的實質就是(shi)用高精(jing)度(du)的靜態秤(cheng)(cheng)(cheng)(cheng)(cheng)——料(liao)斗(dou)秤(cheng)(cheng)(cheng)(cheng)(cheng)來校(xiao)(xiao)驗(yan)低精(jing)度(du)的動態秤(cheng)(cheng)(cheng)(cheng)(cheng)——皮帶(dai)秤(cheng)(cheng)(cheng)(cheng)(cheng)。檢定方法有：物(wu)料(liao)通(tong)過(guo)料(liao)斗(dou)計量進入下料(liao)斗(dou)下料(liao)，通(tong)過(guo)皮帶(dai)秤(cheng)(cheng)(cheng)(cheng)(cheng)進行(xing)動態計量（秤(cheng)(cheng)(cheng)(cheng)(cheng)前校(xiao)(xiao)驗(yan)）；或(huo)用物(wu)料(liao)先進行(xing)動態計量再導入料(liao)斗(dou)秤(cheng)(cheng)(cheng)(cheng)(cheng)（秤(cheng)(cheng)(cheng)(cheng)(cheng)后校(xiao)(xiao)驗(yan)）。將料(liao)斗(dou)秤(cheng)(cheng)(cheng)(cheng)(cheng)稱量的示值(zhi)作(zuo)為標準(zhun)值(zhi)與皮帶(dai)秤(cheng)(cheng)(cheng)(cheng)(cheng)的累計示值(zhi)進行(xing)比較(jiao)，即可得到皮帶(dai)秤(cheng)(cheng)(cheng)(cheng)(cheng)的精(jing)度(du)。

　　電子(zi)皮(pi)帶秤、核子(zi)皮(pi)帶秤都是一種動態(tai)秤，它們的(de)稱(cheng)量(liang)精度不僅取決于(yu)皮(pi)帶秤本(ben)身各部(bu)件的(de)質量(liang)，而且與輸送(song)機的(de)工(gong)作(zuo)狀況、物料(liao)的(de)特性、環境(jing)條件等外部(bu)因素變化有關(guan)，如果不經(jing)常校(xiao)驗，誤差就會超出允許范圍，以致無法滿足使用(yong)(yong)要求，JJG650-90和JJG811-93檢(jian)定規程均(jun)指出，實物檢(jian)定是在現場實際運(yun)行狀態(tai)下(xia)，用(yong)(yong)日常輸送(song)計量(liang)的(de)物料(liao)，對(dui)稱(cheng)重裝置(zhi)進行的(de)一種綜合檢(jian)定。

　　這是(shi)目前檢(jian)定(ding)皮帶秤最準確(que)的方法，并規定(ding)應進(jin)行實(shi)物(wu)檢(jian)定(ding)。規程(cheng)規定(ding)，實(shi)物(wu)檢(jian)定(ding)分在線(xian)實(shi)物(wu)檢(jian)定(ding)和離線(xian)實(shi)物(wu)檢(jian)定(ding)。在線(xian)實(shi)物(wu)檢(jian)定(ding)所用(yong)的設(she)備(bei)就是(shi)皮帶秤實(shi)物(wu)校驗裝置。