現在的(de)使(shi)用(yong)越(yue)(yue)來越(yue)(yue)多，很受一些領域的(de)歡迎，如醫療(liao)衛生(sheng)行業的(de)冷藏冷凍，金屬(shu)材料的(de)深冷處(chu)理(li)等，可我(wo)們(men)在平時(shi)使(shi)用(yong)時(shi)要(yao)如何對(dui)它進行檢(jian)查呢？自(zi)增(zeng)壓液氮罐

    常用(yong)(yong)方法(fa)(fa)為眼觀測和手觸摸外殼。如果(guo)發現外部(bu)有霜，就要(yao)立即停止使用(yong)(yong)。特別是頸管內(nei)壁的(de)霜結冰時不(bu)要(yao)用(yong)(yong)小(xiao)刀去刮，防止頸管內(nei)壁受到破(po)壞(huai)，造成真空不(bu)良。應將液(ye)(ye)(ye)氮(dan)(dan)取(qu)出(chu)，讓其自(zi)然融(rong)化。檢查(cha)液(ye)(ye)(ye)氮(dan)(dan)容器(qi)內(nei)液(ye)(ye)(ye)氮(dan)(dan)的(de)剩余量可用(yong)(yong)稱(cheng)(cheng)(cheng)重(zhong)(zhong)(zhong)(zhong)法(fa)(fa)或細棍探(tan)(tan)查(cha)法(fa)(fa)：稱(cheng)(cheng)(cheng)重(zhong)(zhong)(zhong)(zhong)法(fa)(fa)是用(yong)(yong)前先(xian)稱(cheng)(cheng)(cheng)出(chu)空罐的(de)重(zhong)(zhong)(zhong)(zhong)量，裝(zhuang)滿(man)液(ye)(ye)(ye)氮(dan)(dan)后再(zai)次稱(cheng)(cheng)(cheng)一(yi)重(zhong)(zhong)(zhong)(zhong)量，間隔一(yi)段時間稱(cheng)(cheng)(cheng)重(zhong)(zhong)(zhong)(zhong)一(yi)次，就可以算出(chu)液(ye)(ye)(ye)氮(dan)(dan)的(de)質量；細棍探(tan)(tan)查(cha)法(fa)(fa)是用(yong)(yong)實心(xin)塑料(liao)棒(bang)或細木棒(bang)插入(ru)液(ye)(ye)(ye)氮(dan)(dan)容器(qi)底(di)部(bu)后取(qu)出(chu)，結霜的(de)位置就是液(ye)(ye)(ye)氮(dan)(dan)的(de)位置，要(yao)是用(yong)(yong)空心(xin)的(de)金屬測量，用(yong)(yong)棉花球將金屬堵住，不(bu)要(yao)讓液(ye)(ye)(ye)氮(dan)(dan)噴(pen)出(chu)傷人。