FN-II降落數值儀是(shi)用(yong)於(yu)測(ce)定(ding)穀(gu)物(wu)降(jiang)落(luo)數(shu)值(zhi)的(de)專(zhuan)用(yong)儀(yi)器(qi)，能(neng)夠(gou)通(tong)過(guo)測(ce)定(ding)降(jiang)落(luo)數(shu)值(zhi)表(biao)征(zheng)穀(gu)物(wu)的(de)澱(dian)粉(fen)酶(mei)活(huo)性(xing)，判(pan)斷(duan)穀(gu)物(wu)的(de)發(fa)芽(ya)損(sun)傷(shang)程(cheng)度(du)

，尤(you)其(qi)適(shi)用(yong)於(yu)小(xiao)麥(mai)和(he)小(xiao)麥(mai)粉(fen)的(de)測(ce)定(ding)，是(shi)糧(liang)食(shi)貯(zhu)藏(zang)、麵粉加工
、食品加工等領域應當配備的儀器。

    該降落數值儀采用電子計時器精準計時，水浴裝置由整體加熱單元
、lengquexitongheshuiweizhishiqizucheng，caiyongjinshuzhizhandujiaobanqi，nenggoushixiangjiaoshaikongshangxiaziruzhuandong，gaiyiqideceshiyuanlishiliyongguwufen

，ruxiaomaifendexuanfuyezaifeishuiyuzhongxunsuhuhua，bingyinqizhongα-dianfenmeihuoxingdebutongershihuhuawudedianfenbutongchengdudebeiyehua
，yehuachengdubutong，jiaobanqizaihuhuawuzhongxiajiangsudubutong
，jiangluoshuzhiyejiubutong，jiangluozhidegaodiyejiubiaominglexiangyingdeα-澱粉酶活性的差異
，降落值是以攪拌棒在糊化液自由下降一段特定高度所需的秒數來表示的。
    降jiang落luo數shu值zhi儀yi使shi用yong時shi
，建jian議yi每mei天tian做zuo實shi驗yan前qian，檢jian查zha沸fei水shui浴yu中zhong的de水shui量liang，保bao證zheng水shui平ping線xian發fa生sheng變bian化hua的de差cha距ju在zai一yi零ling米mi以yi內nei，根gen據ju水shui浴yu外wai的de水shui位wei計ji定ding期qi向xiang加jia熱re池chi中zhong加jia入ru符fu合he國guo家jia標biao準zhun的de蒸zheng餾liu水shui或huo去qu離li子zi水shui
，切qie忌ji加jia入ru自zi來lai水shui或huo化hua學xue藥yao品pin。否fou則ze會hui腐fu蝕shi加jia熱re棒bang


，影ying響xiang加jia熱re效xiao果guo。如ru在zai實shi驗yan過guo程cheng中zhong，需xu要yao加jia水shui
，應ying參can照zhao儀yi器qi說shuo明ming書shu，取qu出chu試shi管guan，關guan閉bi電dian源yuan
，加jia入ru符fu合he國guo家jia標biao準zhun的de蒸zheng餾liu水shui或huo去qu離li子zi水shui，開kai啟qi電dian源yuan，等deng待dai水shui加jia熱re到dao沸fei騰teng狀zhuang態tai後hou，再zai進jin行xing實shi驗yan。