上海防爆電子天平，工業車用衡器

關于電(dian)(dian)(dian)子天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)的(de)(de)(de)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)正方法(使用(yong)前一(yi)定要仔(zi)細閱讀說(shuo)明(ming)書(shu))，在檢(jian)定(測試)中(zhong)我們發現(xian)(xian)(xian)(xian)，對(dui)(dui)天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)進(jin)行(xing)*計(ji)量(liang)(liang)測試時(shi)(shi)(shi)誤差較(jiao)大，究其(qi)原因(yin)(yin)，相(xiang)當一(yi)部分(fen)儀(yi)器(qi)(qi)，在較(jiao)長的(de)(de)(de)時(shi)(shi)(shi)間(jian)間(jian)隔內(nei)未進(jin)行(xing)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)，而且(qie)認為(wei)(wei)(wei)(wei)(wei)天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)顯(xian)(xian)示(shi)(shi)(shi)零(ling)(ling)位(wei)便可直接稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)。(需(xu)要指出(chu)(chu)(chu)(chu)的(de)(de)(de)是(shi)(shi)，電(dian)(dian)(dian)子天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)開機顯(xian)(xian)示(shi)(shi)(shi)零(ling)(ling)點，不能(neng)說(shuo)明(ming)天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)的(de)(de)(de)數據準(zhun)(zhun)(zhun)(zhun)(zhun)確(que)度符合測試標準(zhun)(zhun)(zhun)(zhun)(zhun)，只能(neng)說(shuo)明(ming)天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)零(ling)(ling)位(wei)穩定性(xing)合格。因(yin)(yin)為(wei)(wei)(wei)(wei)(wei)衡量(liang)(liang)一(yi)臺天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)合格與否還需(xu)綜合考慮其(qi)它技術指標的(de)(de)(de)符合性(xing))。因(yin)(yin)存放時(shi)(shi)(shi)間(jian)較(jiao)長，位(wei)置移(yi)動(dong)，環境(jing)變(bian)(bian)化(hua)或為(wei)(wei)(wei)(wei)(wei)獲得精(jing)確(que)測量(liang)(liang)，天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)在使用(yong)前一(yi)般(ban)都(dou)應進(jin)行(xing)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)操(cao)(cao)作。校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)方法分(fen)為(wei)(wei)(wei)(wei)(wei)內(nei)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)和(he)外校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)兩種(zhong)。德國生產的(de)(de)(de)賽多利斯，瑞士產的(de)(de)(de)梅特(te)勒，上(shang)海產的(de)(de)(de)"JA"等系列電(dian)(dian)(dian)子天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)均有(you)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)裝置。如(ru)(ru)果(guo)使用(yong)前不仔(zi)細閱讀說(shuo)明(ming)書(shu)很容易忽略(lve)"校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)"操(cao)(cao)作，造(zao)成(cheng)較(jiao)大稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)誤差。下面(mian)以上(shang)海天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)儀(yi)器(qi)(qi)廠JA1203型電(dian)(dian)(dian)子天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)為(wei)(wei)(wei)(wei)(wei)例說(shuo)明(ming)如(ru)(ru)何對(dui)(dui)天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)進(jin)行(xing)外校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)。方法:輕(qing)按(an)CAL鍵當顯(xian)(xian)示(shi)(shi)(shi)器(qi)(qi)出(chu)(chu)(chu)(chu)現(xian)(xian)(xian)(xian)CAL-時(shi)(shi)(shi)，即(ji)松手(shou)，顯(xian)(xian)示(shi)(shi)(shi)器(qi)(qi)就出(chu)(chu)(chu)(chu)現(xian)(xian)(xian)(xian)CAL-100其(qi)中(zhong)"100"為(wei)(wei)(wei)(wei)(wei)閃爍碼(ma)，表示(shi)(shi)(shi)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)碼(ma)需(xu)用(yong)100g的(de)(de)(de)標準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)碼(ma)。此時(shi)(shi)(shi)就把準(zhun)(zhun)(zhun)(zhun)(zhun)備好"100g"校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)碼(ma)放上(shang)稱(cheng)(cheng)(cheng)(cheng)盤，顯(xian)(xian)示(shi)(shi)(shi)器(qi)(qi)即(ji)出(chu)(chu)(chu)(chu)現(xian)(xian)(xian)(xian)"----"等待狀(zhuang)態，經(jing)較(jiao)長時(shi)(shi)(shi)間(jian)后(hou)顯(xian)(xian)示(shi)(shi)(shi)器(qi)(qi)出(chu)(chu)(chu)(chu)現(xian)(xian)(xian)(xian)100.000g，拿去校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)碼(ma)，顯(xian)(xian)示(shi)(shi)(shi)器(qi)(qi)應出(chu)(chu)(chu)(chu)現(xian)(xian)(xian)(xian)0.000g，若出(chu)(chu)(chu)(chu)現(xian)(xian)(xian)(xian)不是(shi)(shi)為(wei)(wei)(wei)(wei)(wei)零(ling)(ling)，則再(zai)清零(ling)(ling)，再(zai)重復(fu)以上(shang)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)操(cao)(cao)作(注(zhu)意(yi):為(wei)(wei)(wei)(wei)(wei)了得到準(zhun)(zhun)(zhun)(zhun)(zhun)確(que)的(de)(de)(de)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)結(jie)果(guo)重復(fu)以上(shang)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)操(cao)(cao)作步驟兩次)。以瑞士MettlerToledo AG系列電(dian)(dian)(dian)子天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)為(wei)(wei)(wei)(wei)(wei)例說(shuo)明(ming)如(ru)(ru)何進(jin)行(xing)天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)內(nei)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)。方法如(ru)(ru)下:天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)置零(ling)(ling)位(wei)，然后(hou)持續(xu)按(an)住(zhu)"CAL"鍵直到CAL int出(chu)(chu)(chu)(chu)現(xian)(xian)(xian)(xian)為(wei)(wei)(wei)(wei)(wei)止，下述情(qing)況將(jiang)在校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)時(shi)(shi)(shi)顯(xian)(xian)示(shi)(shi)(shi):天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)置零(ling)(ling)、內(nei)部校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)碼(ma)裝載完(wan)畢、天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)重新檢(jian)查零(ling)(ling)位(wei)、天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)報(bao)告(gao)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)過(guo)程、天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)報(bao)告(gao)校(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)完(wan)畢、天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)自(zi)動(dong)回復(fu)到稱(cheng)(cheng)(cheng)(cheng)重狀(zhuang)態。1、有(you)的(de)(de)(de)人認為(wei)(wei)(wei)(wei)(wei)在電(dian)(dian)(dian)子天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)量(liang)(liang)程范圍內(nei)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)的(de)(de)(de)物體越重對(dui)(dui)天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)的(de)(de)(de)損害也就越大。這種(zhong)認識(shi)是(shi)(shi)不*正確(que)的(de)(de)(de)。一(yi)般(ban)衡器(qi)(qi)大安全(quan)載荷是(shi)(shi)它所(suo)能(neng)夠承受的(de)(de)(de)、不致使其(qi)計(ji)量(liang)(liang)性(xing)能(neng)發生改變(bian)(bian)的(de)(de)(de)大靜載荷。由于電(dian)(dian)(dian)子天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)采用(yong)了電(dian)(dian)(dian)磁力(li)自(zi)動(dong)補償電(dian)(dian)(dian)路原理，當秤盤加載時(shi)(shi)(shi)(注(zhu)意(yi)不要超過(guo)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)范圍)，電(dian)(dian)(dian)磁力(li)會(hui)將(jiang)秤盤推回到原來的(de)(de)(de)平(ping)(ping)(ping)(ping)(ping)(ping)衡位(wei)置，使電(dian)(dian)(dian)磁力(li)與被稱(cheng)(cheng)(cheng)(cheng)物體的(de)(de)(de)重力(li)相(xiang)平(ping)(ping)(ping)(ping)(ping)(ping)衡，只要在允許范圍內(nei)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)大小對(dui)(dui)天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)的(de)(de)(de)影響是(shi)(shi)很小的(de)(de)(de)，不會(hui)因(yin)(yin)長期稱(cheng)(cheng)(cheng)(cheng)重而影響電(dian)(dian)(dian)子天(tian)(tian)(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)(ping)(ping)的(de)(de)(de)準(zhun)(zhun)(zhun)(zhun)(zhun)確(que)度。

防爆電子天(tian)平選購：

如何(he)選(xuan)(xuan)擇電(dian)(dian)(dian)子(zi)天(tian)(tian)平(ping)(ping)?選(xuan)(xuan)擇電(dian)(dian)(dian)子(zi)天(tian)(tian)平(ping)(ping)應(ying)該從電(dian)(dian)(dian)子(zi)天(tian)(tian)平(ping)(ping)的(de)(de)(de)(de)(de)(de)精度(du)(du)(du)(分(fen)度(du)(du)(du)值(zhi)(zhi)e)上(shang)去考慮(lv)是(shi)(shi)否符合(he)稱(cheng)(cheng)(cheng)量(liang)(liang)的(de)(de)(de)(de)(de)(de)精度(du)(du)(du)要(yao)求。如選(xuan)(xuan)0.1mg精度(du)(du)(du)的(de)(de)(de)(de)(de)(de)天(tian)(tian)平(ping)(ping)或(huo)0.01mg精度(du)(du)(du)的(de)(de)(de)(de)(de)(de)天(tian)(tian)平(ping)(ping)，切忌(ji)不(bu)可(ke)籠(long)統地說(shuo)要(yao)萬分(fen)之一(yi)(yi)或(huo)十萬分(fen)之一(yi)(yi)精度(du)(du)(du)的(de)(de)(de)(de)(de)(de)天(tian)(tian)平(ping)(ping)，因為(wei)國(guo)外(wai)有(you)些廠家是(shi)(shi)用(yong)(yong)相(xiang)對精度(du)(du)(du)來衡(heng)量(liang)(liang)天(tian)(tian)平(ping)(ping)的(de)(de)(de)(de)(de)(de)，否則買(mai)來的(de)(de)(de)(de)(de)(de)天(tian)(tian)平(ping)(ping)無法滿足用(yong)(yong)戶的(de)(de)(de)(de)(de)(de)需要(yao)。例如在實際(ji)工(gong)作(zuo)中遇到這(zhe)樣一(yi)(yi)個情況，用(yong)(yong)一(yi)(yi)臺(tai)實際(ji)標尺分(fen)度(du)(du)(du)值(zhi)(zhi)d為(wei)1mg，檢定標尺分(fen)度(du)(du)(du)值(zhi)(zhi)e為(wei)10mg，大(da)(da)(da)(da)稱(cheng)(cheng)(cheng)量(liang)(liang)為(wei)200g的(de)(de)(de)(de)(de)(de)Mettler電(dian)(dian)(dian)子(zi)天(tian)(tian)平(ping)(ping)，用(yong)(yong)來稱(cheng)(cheng)(cheng)量(liang)(liang)7mg的(de)(de)(de)(de)(de)(de)物體，這(zhe)樣是(shi)(shi)不(bu)能(neng)(neng)得出(chu)準確結果的(de)(de)(de)(de)(de)(de):在《JJG98-90非(fei)自動(dong)天(tian)(tian)平(ping)(ping)試(shi)行檢定規程》中規定，大(da)(da)(da)(da)允許誤差(cha)與檢定標尺分(fen)度(du)(du)(du)值(zhi)(zhi)"e"為(wei)同一(yi)(yi)數(shu)量(liang)(liang)級，此臺(tai)天(tian)(tian)平(ping)(ping)的(de)(de)(de)(de)(de)(de)大(da)(da)(da)(da)允許誤差(cha)為(wei)1e，顯(xian)然(ran)不(bu)能(neng)(neng)稱(cheng)(cheng)(cheng)量(liang)(liang)7mg的(de)(de)(de)(de)(de)(de)物體;稱(cheng)(cheng)(cheng)量(liang)(liang)15mg的(de)(de)(de)(de)(de)(de)物體用(yong)(yong)此類天(tian)(tian)平(ping)(ping)也(ye)不(bu)是(shi)(shi)選(xuan)(xuan)擇，因為(wei)其測試(shi)結果的(de)(de)(de)(de)(de)(de)相(xiang)對誤差(cha)會很(hen)大(da)(da)(da)(da)，應(ying)選(xuan)(xuan)擇更高一(yi)(yi)級的(de)(de)(de)(de)(de)(de)天(tian)(tian)平(ping)(ping)，有(you)的(de)(de)(de)(de)(de)(de)廠家在出(chu)廠時已規定了小稱(cheng)(cheng)(cheng)量(liang)(liang)的(de)(de)(de)(de)(de)(de)數(shu)值(zhi)(zhi)。因此我們在選(xuan)(xuan)購及使用(yong)(yong)電(dian)(dian)(dian)子(zi)天(tian)(tian)平(ping)(ping)時必須考慮(lv)精度(du)(du)(du)等級。⑵對稱(cheng)(cheng)(cheng)量(liang)(liang)范(fan)圍(wei)的(de)(de)(de)(de)(de)(de)要(yao)求:選(xuan)(xuan)擇電(dian)(dian)(dian)子(zi)天(tian)(tian)平(ping)(ping)除了看(kan)其精度(du)(du)(du)，還應(ying)看(kan)大(da)(da)(da)(da)稱(cheng)(cheng)(cheng)量(liang)(liang)是(shi)(shi)否滿足量(liang)(liang)程的(de)(de)(de)(de)(de)(de)需要(yao)。通常取大(da)(da)(da)(da)載荷加少許保險系(xi)數(shu)即可(ke)，也(ye)就是(shi)(shi)常用(yong)(yong)載荷再放寬一(yi)(yi)些即可(ke)，不(bu)是(shi)(shi)越大(da)(da)(da)(da)越好。

上海防爆電子天平，工業車用衡器