一、天平秤的原理是什么
天(tian)平(ping)(ping)(ping)(ping)秤(cheng)(cheng)是(shi)(shi)用(yong)來(lai)稱量(liang)物(wu)(wu)(wu)體重(zhong)量(liang)的(de)(de)(de)(de)衡(heng)器,它有(you)兩(liang)種(zhong)(zhong)原(yuan)(yuan)理(li):1、機(ji)械式天(tian)平(ping)(ping)(ping)(ping)秤(cheng)(cheng)原(yuan)(yuan)理(li):機(ji)械式天(tian)平(ping)(ping)(ping)(ping)秤(cheng)(cheng)就是(shi)(shi)常說的(de)(de)(de)(de)托盤(pan)天(tian)平(ping)(ping)(ping)(ping),它的(de)(de)(de)(de)工(gong)作原(yuan)(yuan)理(li)主(zhu)要利(li)用(yong)的(de)(de)(de)(de)是(shi)(shi)杠(gang)(gang)(gang)桿(gan)原(yuan)(yuan)理(li),確切來(lai)說,托盤(pan)天(tian)平(ping)(ping)(ping)(ping)利(li)用(yong)的(de)(de)(de)(de)是(shi)(shi)等(deng)臂杠(gang)(gang)(gang)桿(gan)平(ping)(ping)(ping)(ping)衡(heng)原(yuan)(yuan)理(li),天(tian)平(ping)(ping)(ping)(ping)的(de)(de)(de)(de)橫梁(liang)就是(shi)(shi)一(yi)個杠(gang)(gang)(gang)桿(gan),在杠(gang)(gang)(gang)桿(gan)的(de)(de)(de)(de)兩(liang)端(duan)各有(you)一(yi)小盤(pan),左(zuo)端(duan)放(fang)物(wu)(wu)(wu)體、右端(duan)放(fang)砝(fa)(fa)碼,杠(gang)(gang)(gang)桿(gan)中央裝(zhuang)有(you)指針,兩(liang)端(duan)平(ping)(ping)(ping)(ping)衡(heng)時,兩(liang)端(duan)的(de)(de)(de)(de)質量(liang)(重(zhong)量(liang))相等(deng),根據砝(fa)(fa)碼的(de)(de)(de)(de)重(zhong)量(liang)即可得知物(wu)(wu)(wu)體的(de)(de)(de)(de)重(zhong)量(liang)。2、電(dian)子天(tian)平(ping)(ping)(ping)(ping)秤(cheng)(cheng)原(yuan)(yuan)理(li):電(dian)子天(tian)平(ping)(ping)(ping)(ping)秤(cheng)(cheng)的(de)(de)(de)(de)原(yuan)(yuan)理(li)和(he)(he)托盤(pan)天(tian)平(ping)(ping)(ping)(ping)不(bu)同,它利(li)用(yong)的(de)(de)(de)(de)是(shi)(shi)電(dian)磁力(li)補償(chang)平(ping)(ping)(ping)(ping)衡(heng)原(yuan)(yuan)理(li),實質也(ye)是(shi)(shi)一(yi)種(zhong)(zhong)杠(gang)(gang)(gang)桿(gan)平(ping)(ping)(ping)(ping)衡(heng),只是(shi)(shi)在杠(gang)(gang)(gang)桿(gan)的(de)(de)(de)(de)一(yi)端(duan)采用(yong)了電(dian)磁力(li),當稱盤(pan)上(shang)加載(zai)稱物(wu)(wu)(wu)m2時,杠(gang)(gang)(gang)桿(gan)偏離零(ling)位,此(ci)時零(ling)位指示器有(you)偏差信號產生,經過放(fang)大器和(he)(he)調節器等(deng)一(yi)系(xi)列(lie)轉換后(hou),使線圈(quan)的(de)(de)(de)(de)電(dian)流I增大,電(dian)磁力(li)矩右也(ye)將一(yi)起增大,杠(gang)(gang)(gang)桿(gan)回到原(yuan)(yuan)來(lai)平(ping)(ping)(ping)(ping)衡(heng)位置(zhi),即天(tian)平(ping)(ping)(ping)(ping)的(de)(de)(de)(de)零(ling)位,最后(hou)把(ba)電(dian)信號處(chu)理(li)成為(wei)數字信號,數顯(xian)在顯(xian)示屏上(shang)。
二、天平秤的作用
天(tian)(tian)平(ping)(ping)秤是用(yong)(yong)來(lai)測量物(wu)體重量的(de)衡器(qi),它的(de)主(zhu)要作(zuo)用(yong)(yong)就是稱一(yi)(yi)些(xie)小計量物(wu)品,一(yi)(yi)般用(yong)(yong)于科研機構、學校實驗室、藥(yao)店等場(chang)所,根據不同的(de)精(jing)度可分為普通天(tian)(tian)平(ping)(ping)、精(jing)密天(tian)(tian)平(ping)(ping)和分析(xi)天(tian)(tian)平(ping)(ping);除此之外,一(yi)(yi)些(xie)計量部(bu)門、商檢部(bu)門也會用(yong)(yong)天(tian)(tian)平(ping)(ping)秤來(lai)檢查或(huo)校準砝碼,這種稱為檢定天(tian)(tian)平(ping)(ping)。
三、天平秤怎么使用
1、機械天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)秤(cheng)(cheng)的(de)(de)(de)(de)(de)使用方(fang)(fang)法:(1)將托(tuo)盤(pan)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)放(fang)置(zhi)(zhi)在(zai)(zai)水(shui)平(ping)(ping)(ping)(ping)的(de)(de)(de)(de)(de)地方(fang)(fang),游(you)(you)碼(ma)(ma)(ma)指向紅色0刻(ke)度線(xian)。(2)調(diao)節(jie)平(ping)(ping)(ping)(ping)衡(heng)(heng)螺(luo)母(天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)兩端的(de)(de)(de)(de)(de)螺(luo)母)調(diao)節(jie)零點直至(zhi)(zhi)指針對(dui)準中央(yang)刻(ke)度線(xian)直至(zhi)(zhi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)橫梁水(shui)平(ping)(ping)(ping)(ping)位(wei)置(zhi)(zhi)平(ping)(ping)(ping)(ping)衡(heng)(heng)。(小口(kou)訣:放(fang)平(ping)(ping)(ping)(ping)移零調(diao)平(ping)(ping)(ping)(ping)衡(heng)(heng),螺(luo)母調(diao)平(ping)(ping)(ping)(ping)反指針/走高(gao)(gao)端。)(3)左托(tuo)盤(pan)放(fang)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)物(wu)(wu),右(you)(you)托(tuo)盤(pan)放(fang)砝(fa)(fa)碼(ma)(ma)(ma)。根據稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)物(wu)(wu)的(de)(de)(de)(de)(de)性(xing)狀,放(fang)在(zai)(zai)玻璃(li)器(qi)(qi)皿或潔(jie)凈的(de)(de)(de)(de)(de)紙(zhi)上(shang)(shang),事先(xian)應在(zai)(zai)同一天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)上(shang)(shang)稱(cheng)(cheng)(cheng)(cheng)得玻璃(li)器(qi)(qi)皿或紙(zhi)片的(de)(de)(de)(de)(de)質(zhi)量(liang)(liang),然后(hou)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)待稱(cheng)(cheng)(cheng)(cheng)物(wu)(wu)質(zhi)。(4)砝(fa)(fa)碼(ma)(ma)(ma)用鑷(nie)子(zi)夾取,千萬不(bu)能把砝(fa)(fa)碼(ma)(ma)(ma)弄(nong)濕、弄(nong)臟(這樣會讓砝(fa)(fa)碼(ma)(ma)(ma)生銹,砝(fa)(fa)碼(ma)(ma)(ma)質(zhi)量(liang)(liang)變大(da),測量(liang)(liang)結(jie)果(guo)不(bu)準確),游(you)(you)碼(ma)(ma)(ma)也(ye)要(yao)(yao)用鑷(nie)子(zi)撥動。(5)添加(jia)砝(fa)(fa)碼(ma)(ma)(ma)從估計稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)物(wu)(wu)的(de)(de)(de)(de)(de)最大(da)值加(jia)起,逐步減(jian)小。托(tuo)盤(pan)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)只能稱(cheng)(cheng)(cheng)(cheng)準到0.1克。加(jia)減(jian)砝(fa)(fa)碼(ma)(ma)(ma)并移動標尺上(shang)(shang)的(de)(de)(de)(de)(de)游(you)(you)碼(ma)(ma)(ma),直至(zhi)(zhi)指針再(zai)次(ci)對(dui)準中央(yang)刻(ke)度線(xian)。(小口(kou)訣:先(xian)估后(hou)測,左物(wu)(wu)右(you)(you)碼(ma)(ma)(ma),由大(da)到小,后(hou)移游(you)(you)碼(ma)(ma)(ma))(6)過(guo)冷(leng)過(guo)熱的(de)(de)(de)(de)(de)物(wu)(wu)體(ti)不(bu)可放(fang)在(zai)(zai)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)上(shang)(shang)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang),應先(xian)在(zai)(zai)干(gan)燥器(qi)(qi)內放(fang)置(zhi)(zhi)至(zhi)(zhi)室(shi)溫后(hou)再(zai)稱(cheng)(cheng)(cheng)(cheng)。(7)物(wu)(wu)體(ti)的(de)(de)(de)(de)(de)質(zhi)量(liang)(liang)=砝(fa)(fa)碼(ma)(ma)(ma)的(de)(de)(de)(de)(de)總質(zhi)量(liang)(liang)+游(you)(you)碼(ma)(ma)(ma)在(zai)(zai)標尺上(shang)(shang)所對(dui)的(de)(de)(de)(de)(de)刻(ke)度值。(M左=M右(you)(you)+M游(you)(you))2、電子(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)秤(cheng)(cheng)的(de)(de)(de)(de)(de)使用方(fang)(fang)法:(1)調(diao)平(ping)(ping)(ping)(ping):多種(zhong)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)開(kai)機前,應觀察天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)后(hou)部水(shui)平(ping)(ping)(ping)(ping)儀內的(de)(de)(de)(de)(de)水(shui)泡是(shi)否(fou)位(wei)于圓環的(de)(de)(de)(de)(de)中央(yang),否(fou)則通過(guo)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)的(de)(de)(de)(de)(de)地腳(jiao)螺(luo)栓(shuan)調(diao)節(jie),左旋升高(gao)(gao),右(you)(you)旋下降。(2)預熱:天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)在(zai)(zai)初次(ci)接通電源或長時(shi)間斷電后(hou)開(kai)機時(shi),至(zhi)(zhi)少需要(yao)(yao)30分(fen)鐘(zhong)的(de)(de)(de)(de)(de)預熱時(shi)間。因此(ci),實驗室(shi)電子(zi)天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)在(zai)(zai)通常(chang)情況下,不(bu)要(yao)(yao)經(jing)常(chang)切斷電源。(3)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang):按(an)下ON/OFF鍵(jian),接通顯示(shi)器(qi)(qi),等待儀器(qi)(qi)自(zi)檢。當顯示(shi)器(qi)(qi)顯示(shi)零時(shi),自(zi)檢過(guo)程結(jie)束,天(tian)(tian)(tian)(tian)平(ping)(ping)(ping)(ping)可進(jin)行(xing)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang);放(fang)置(zhi)(zhi)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)紙(zhi),按(an)顯示(shi)屏兩側的(de)(de)(de)(de)(de)Tare鍵(jian)去皮,待顯示(shi)器(qi)(qi)顯示(shi)零時(shi),在(zai)(zai)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)紙(zhi)加(jia)所要(yao)(yao)稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)的(de)(de)(de)(de)(de)試(shi)劑稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)。稱(cheng)(cheng)(cheng)(cheng)量(liang)(liang)完畢,按(an)ON/OFF鍵(jian),關斷顯示(shi)器(qi)(qi)。
四、電子天平多少錢一臺
電子天平是新型的天平秤,是工業制造業和化學實驗室常用稱量儀器之一,具有稱量快捷、使用方便等諸多優點,它有分析天平、精密天平、普通天平等不同精度等級的產品,價格也有所不同,一般根據不同的量程、品牌、功能等方面,價格從一兩百元一臺到兩三萬元一臺不等。購買天平秤的時候,要注意根據測量需求選擇合適精度的產品,并注意看電子天平秤的做工、配件和性能等方面,選擇優質的天平秤品牌產品。
選(xuan)購(gou)天平秤時千萬不要因為價(jia)格便宜(yi),而盲目跟從購(gou)買,選(xuan)擇比較有(you)知名度(du)的(de)品牌,不僅(jin)品質有(you)保證,售(shou)后服務也有(you)保障。當(dang)然追(zhui)求品牌的(de)東西不一定就是(shi)追(zhui)求價(jia)格的(de)昂貴,不同(tong)的(de)經濟(ji)水平我們可(ke)以(yi)選(xuan)擇不同(tong)價(jia)位的(de)名牌產品。選(xuan)擇網購(gou)商(shang)品的(de)朋友要認準品牌的(de)旗艦店鋪,這樣(yang)子才能做到萬無一失。