防爆電子天平   不銹鋼天平 

電(dian)子天(tian)平(ping)，用(yong)于稱量(liang)物體質量(liang)。電(dian)子天(tian)平(ping)一(yi)般采用(yong)應(ying)變(bian)(bian)式(shi)傳(chuan)(chuan)感器(qi)、電(dian)容式(shi)傳(chuan)(chuan)感器(qi)、電(dian)磁平(ping)衡式(shi)傳(chuan)(chuan)感器(qi)。應(ying)變(bian)(bian)式(shi)傳(chuan)(chuan)感器(qi)，結構簡單、造價低，但精度有限。

在(zai)2009年(nian)前不(bu)能做到很(hen)高精(jing)度;電容(rong)式傳感器稱(cheng)量(liang)速(su)度快，性價比較高，但也不(bu)能達到很(hen)高精(jing)度;采用(yong)電磁平衡傳感器的電子天(tian)平。其特(te)點是稱(cheng)量(liang)準確可靠、顯示(shi)快速(su)清晰并且具有自(zi)動(dong)(dong)檢測系統、簡便的自(zi)動(dong)(dong)校(xiao)準裝置以及超載保(bao)護等裝置。

分類

一、電(dian)子(zi)(zi)天平(ping)及其分類按(an)電(dian)子(zi)(zi)天平(ping)的(de)精(jing)度可分為以下幾類:

1、超(chao)微(wei)量(liang)(liang)電子(zi)天(tian)平:超(chao)微(wei)量(liang)(liang)天(tian)平的大(da)稱量(liang)(liang)是2至5g，其標(biao)尺(chi)分(fen)度值小于(yu)(大(da))稱量(liang)(liang)的10-6，如Mettler的UMT2型(xing)電子(zi)天(tian)平等(deng)屬于(yu)超(chao)微(wei)量(liang)(liang)電子(zi)天(tian)平。

2、微量(liang)天平(ping):微量(liang)天平(ping)的(de)稱量(liang)一般(ban)在3至(zhi)50g，其分度值小于(大)稱量(liang)的(de)10-5，如Mettler的(de)AT21型電(dian)子天平(ping)以(yi)及Sartoruis的(de)S4型電(dian)子天平(ping)。

3、半微(wei)量(liang)天(tian)(tian)平(ping)(ping):半微(wei)量(liang)天(tian)(tian)平(ping)(ping)的(de)稱(cheng)量(liang)一(yi)般在20至100g，其分度值小(xiao)于(大)稱(cheng)量(liang)的(de)10-5，如Mettler的(de)AE50型電(dian)子天(tian)(tian)平(ping)(ping)和(he)Sartoruis的(de)M25D型電(dian)子天(tian)(tian)平(ping)(ping)等均屬于此(ci)類。

4、常量電(dian)(dian)子(zi)天平(ping)(ping):此種天平(ping)(ping)的大稱(cheng)量一般在(zai)100至200g，其(qi)分度值小于(大)稱(cheng)量的10-5，如Mettler的AE200型(xing)電(dian)(dian)子(zi)天平(ping)(ping)和(he)Sartoruis的A120S、A200S型(xing)電(dian)(dian)子(zi)天平(ping)(ping)均屬于常量電(dian)(dian)子(zi)天平(ping)(ping)。

5、分(fen)析(xi)天(tian)平:其實(shi)電(dian)子分(fen)析(xi)天(tian)平，是常量天(tian)平、半(ban)微量天(tian)平、微量天(tian)平和超微量天(tian)平的總稱。

6、 精密電(dian)子(zi)天平:這類電(dian)子(zi)天平是準確度級別(bie)為Ⅱ級的電(dian)子(zi)天平的統稱(cheng)。

校準

關于電(dian)子(zi)(zi)(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)校(xiao)(xiao)(xiao)(xiao)正(zheng)方(fang)法(使(shi)用(yong)前一定要仔(zi)細(xi)閱讀(du)說(shuo)明(ming)書)，在(zai)檢定(測試)中我們發(fa)現(xian)，對(dui)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)進(jin)行*計(ji)量(liang)(liang)(liang)(liang)測試時(shi)(shi)誤(wu)差較大，究其(qi)原因，相(xiang)(xiang)當一部(bu)分(fen)(fen)儀(yi)器(qi)(qi)(qi)，在(zai)較長(chang)(chang)的(de)(de)(de)(de)(de)(de)時(shi)(shi)間(jian)間(jian)隔內(nei)未進(jin)行校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)，而且認(ren)為天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)顯(xian)示(shi)零(ling)(ling)位(wei)(wei)(wei)(wei)便可直接稱(cheng)(cheng)量(liang)(liang)(liang)(liang)。(需要指出的(de)(de)(de)(de)(de)(de)是(shi)，電(dian)子(zi)(zi)(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)開機顯(xian)示(shi)零(ling)(ling)點，不(bu)能說(shuo)明(ming)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)稱(cheng)(cheng)量(liang)(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)數(shu)據準(zhun)(zhun)(zhun)(zhun)(zhun)確(que)度符合測試標(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)，只能說(shuo)明(ming)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)零(ling)(ling)位(wei)(wei)(wei)(wei)穩(wen)定性合格(ge)。因為衡量(liang)(liang)(liang)(liang)一臺天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)合格(ge)與(yu)否，還需綜合考慮其(qi)它技術指標(biao)的(de)(de)(de)(de)(de)(de)符合性)。因存(cun)放(fang)時(shi)(shi)間(jian)較長(chang)(chang)，位(wei)(wei)(wei)(wei)置(zhi)(zhi)移動，環境(jing)變化或為獲得精確(que)測量(liang)(liang)(liang)(liang)，天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)在(zai)使(shi)用(yong)前一般都應進(jin)行校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)操(cao)作(zuo)(zuo)(zuo)。校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)方(fang)法分(fen)(fen)為內(nei)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)和外校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)兩(liang)種。德(de)國生產(chan)的(de)(de)(de)(de)(de)(de)賽多利斯，瑞士產(chan)的(de)(de)(de)(de)(de)(de)梅特(te)勒，上(shang)(shang)海(hai)產(chan)的(de)(de)(de)(de)(de)(de)"JA"等系列電(dian)子(zi)(zi)(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)均(jun)有(you)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)裝置(zhi)(zhi)。如(ru)果使(shi)用(yong)前不(bu)仔(zi)細(xi)閱讀(du)說(shuo)明(ming)書很容易忽略(lve)"校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)"操(cao)作(zuo)(zuo)(zuo)，造(zao)成較大稱(cheng)(cheng)量(liang)(liang)(liang)(liang)誤(wu)差。下面(mian)以上(shang)(shang)海(hai)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)儀(yi)器(qi)(qi)(qi)廠JA1203型電(dian)子(zi)(zi)(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)為例說(shuo)明(ming)如(ru)何對(dui)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)進(jin)行外校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)。方(fang)法:輕按CAL鍵當顯(xian)示(shi)器(qi)(qi)(qi)出現(xian)CAL-時(shi)(shi)，即松(song)手，顯(xian)示(shi)器(qi)(qi)(qi)就(jiu)出現(xian)CAL-100其(qi)中"100"為閃爍碼(ma)(ma)，表示(shi)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)碼(ma)(ma)需用(yong)100g的(de)(de)(de)(de)(de)(de)標(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)碼(ma)(ma)。此時(shi)(shi)就(jiu)把準(zhun)(zhun)(zhun)(zhun)(zhun)備好"100g"校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)碼(ma)(ma)放(fang)上(shang)(shang)稱(cheng)(cheng)盤，顯(xian)示(shi)器(qi)(qi)(qi)即出現(xian)"----"等待狀態，經較長(chang)(chang)時(shi)(shi)間(jian)后顯(xian)示(shi)器(qi)(qi)(qi)出現(xian)100.000g，拿去校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)碼(ma)(ma)，顯(xian)示(shi)器(qi)(qi)(qi)應出現(xian)0.000g，若出現(xian)不(bu)是(shi)為零(ling)(ling)，則再清零(ling)(ling)，再重復(fu)以上(shang)(shang)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)操(cao)作(zuo)(zuo)(zuo)(注(zhu)意:為了得到(dao)準(zhun)(zhun)(zhun)(zhun)(zhun)確(que)的(de)(de)(de)(de)(de)(de)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)結(jie)果重復(fu)以上(shang)(shang)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)操(cao)作(zuo)(zuo)(zuo)步驟兩(liang)次)。以瑞士MettlerToledo AG系列電(dian)子(zi)(zi)(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)為例說(shuo)明(ming)如(ru)何進(jin)行天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)內(nei)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)。方(fang)法如(ru)下:天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)置(zhi)(zhi)零(ling)(ling)位(wei)(wei)(wei)(wei)，然(ran)后持續按住"CAL"鍵直到(dao)CAL int出現(xian)為止，下述情況將在(zai)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)時(shi)(shi)顯(xian)示(shi):天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)置(zhi)(zhi)零(ling)(ling)、內(nei)部(bu)校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)砝(fa)(fa)碼(ma)(ma)裝載(zai)(zai)完畢(bi)、天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)重新(xin)檢查零(ling)(ling)位(wei)(wei)(wei)(wei)、天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)報告校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)過程、天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)報告校(xiao)(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)(zhun)(zhun)完畢(bi)、天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)自動回復(fu)到(dao)稱(cheng)(cheng)重狀態。1、有(you)的(de)(de)(de)(de)(de)(de)人認(ren)為在(zai)電(dian)子(zi)(zi)(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)量(liang)(liang)(liang)(liang)程范(fan)(fan)圍內(nei)稱(cheng)(cheng)量(liang)(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)物體越(yue)重對(dui)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)損害也就(jiu)越(yue)大。這種認(ren)識是(shi)不(bu)*正(zheng)確(que)的(de)(de)(de)(de)(de)(de)。一般衡器(qi)(qi)(qi)大安(an)全(quan)載(zai)(zai)荷是(shi)它所能夠承受的(de)(de)(de)(de)(de)(de)、不(bu)致使(shi)其(qi)計(ji)量(liang)(liang)(liang)(liang)性能改變的(de)(de)(de)(de)(de)(de)大靜(jing)載(zai)(zai)荷。由(you)于電(dian)子(zi)(zi)(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)采用(yong)了電(dian)磁力(li)自動補償電(dian)路原理，當秤(cheng)(cheng)盤加載(zai)(zai)時(shi)(shi)(注(zhu)意不(bu)要超過稱(cheng)(cheng)量(liang)(liang)(liang)(liang)范(fan)(fan)圍)，電(dian)磁力(li)會(hui)將秤(cheng)(cheng)盤推回到(dao)原來的(de)(de)(de)(de)(de)(de)平(ping)(ping)(ping)衡位(wei)(wei)(wei)(wei)置(zhi)(zhi)，使(shi)電(dian)磁力(li)與(yu)被(bei)稱(cheng)(cheng)物體的(de)(de)(de)(de)(de)(de)重力(li)相(xiang)(xiang)平(ping)(ping)(ping)衡，只要在(zai)允許(xu)范(fan)(fan)圍內(nei)稱(cheng)(cheng)量(liang)(liang)(liang)(liang)大小(xiao)對(dui)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)影響(xiang)是(shi)很小(xiao)的(de)(de)(de)(de)(de)(de)，不(bu)會(hui)因長(chang)(chang)期(qi)稱(cheng)(cheng)重而影響(xiang)電(dian)子(zi)(zi)(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)的(de)(de)(de)(de)(de)(de)準(zhun)(zhun)(zhun)(zhun)(zhun)確(que)度。

防爆電子天平   不銹鋼天平