產品概述
數字電阻率測試儀BEST-212
數字電阻率測試儀BEST-212
1、電阻測量范圍:0.01×104Ω ~1×1018Ω。
2、電流測量范圍:2×10-4A~1×10-16A
3、顯 示 方 式: 32位LED液晶屏顯示 液晶觸摸屏 BEST-212 電阻率直接測試,詳細資料請索取
4、內置測試電壓(ya): 10V 、50V、100V、250、500、1000V
5、基本準確度:1%
6、使用(yong)環境: 溫度:0℃~40℃,相(xiang)對濕度<80%
7、機內測試電壓: 10V/50V/100/250/500/1000V 任意(yi)切(qie)換(huan)
8、供(gong)電(dian)形式(shi): AC 220V,50HZ,功(gong)耗約5W
9、儀(yi)器尺(chi)寸: 285mm× 245mm×120 mm
10、質量(liang): 約10KG
工作原理
根(gen)據歐姆定(ding)律(lv),被(bei)測電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)Rx等(deng)于(yu)施加電(dian)(dian)(dian)(dian)(dian)壓V除以(yi)通過(guo)的電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)I。傳統的高阻(zu)(zu)計(ji)的工作原(yuan)理是(shi)(shi)測量(liang)電(dian)(dian)(dian)(dian)(dian)壓V固定(ding),通過(guo)測量(liang)流(liu)(liu)過(guo)取樣(yang)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)的電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)I來(lai)得(de)到電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值。從(cong)歐姆定(ding)律(lv)可以(yi)看(kan)出,由(you)(you)于(yu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)I是(shi)(shi)與電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)成(cheng)(cheng)反比,而不是(shi)(shi)成(cheng)(cheng)正比,所以(yi)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)的顯示(shi)值是(shi)(shi)非(fei)線性的,即(ji)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)無(wu)窮(qiong)大(da)時,電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)為零,即(ji)表(biao)頭的零位處是(shi)(shi)∞,其(qi)附近的刻度非(fei)常密,分(fen)辨(bian)率(lv)很低。整個刻度是(shi)(shi)非(fei)線性的。又由(you)(you)于(yu)測量(liang)不同的電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)時,其(qi)電(dian)(dian)(dian)(dian)(dian)壓V也(ye)會有些(xie)變化,所以(yi)普通的高阻(zu)(zu)計(ji)是(shi)(shi)精度差、分(fen)辨(bian)率(lv)低。
本儀(yi)器是同時測(ce)出電(dian)(dian)(dian)阻(zu)兩端的電(dian)(dian)(dian)壓V和(he)流(liu)(liu)過(guo)電(dian)(dian)(dian)阻(zu)的電(dian)(dian)(dian)流(liu)(liu)I,通過(guo)內(nei)部(bu)的大(da)(da)規模集成電(dian)(dian)(dian)路完成電(dian)(dian)(dian)壓除(chu)以(yi)(yi)電(dian)(dian)(dian)流(liu)(liu)的計算(suan),然后(hou)把(ba)所(suo)得到(dao)(dao)的結果(guo)經過(guo)A/D轉換后(hou)以(yi)(yi)數字顯示出電(dian)(dian)(dian)阻(zu)值(zhi),即(ji)便是電(dian)(dian)(dian)阻(zu)兩端的電(dian)(dian)(dian)壓V和(he)流(liu)(liu)過(guo)電(dian)(dian)(dian)阻(zu)的電(dian)(dian)(dian)流(liu)(liu)I是同時變(bian)化,其(qi)(qi)顯示的電(dian)(dian)(dian)阻(zu)值(zhi)不(bu)象普通高(gao)阻(zu)計那樣(yang)因被測(ce)電(dian)(dian)(dian)壓V的變(bian)化或電(dian)(dian)(dian)流(liu)(liu)I的變(bian)化而變(bian),所(suo)以(yi)(yi),即(ji)使測(ce)量電(dian)(dian)(dian)壓、被測(ce)量電(dian)(dian)(dian)阻(zu)、電(dian)(dian)(dian)源電(dian)(dian)(dian)壓等發(fa)生(sheng)變(bian)化對(dui)其(qi)(qi)結果(guo)影響不(bu)大(da)(da),其(qi)(qi)測(ce)量精度很(hen)高(gao),從理論上講其(qi)(qi)誤差可以(yi)(yi)做到(dao)(dao)零(ling),而實(shi)際誤差可以(yi)(yi)做到(dao)(dao)千分之幾或萬(wan)分之幾。
典型應用
1、測量絕緣材料(liao)電(dian)阻(率)
2、測量防靜電(dian)材料的電(dian)阻及(ji)電(dian)阻率
3、測量計算機(ji)房用活(huo)動地板的系統電(dian)阻值
4、測(ce)量防靜電鞋、導電鞋的電阻值
5、光電(dian)二極管(guan)暗(an)電(dian)流測量(liang)
6、物(wu)理,光(guang)學(xue)和材(cai)料研(yan)究
標準配置:
1、測試儀器:1臺
2、.電源線:1條
3、測量線:3根(屏蔽線、測試接線、接地線)
4、使用(yong)說明書:1份
備注:
本(ben)儀器(qi)配不同(tong)的測量電極(ji)(夾具)可以測量不同(tong)材料(liao)(固體(ti)(ti)(ti)、粉體(ti)(ti)(ti)或液體(ti)(ti)(ti))的體(ti)(ti)(ti)積(ji)電阻(zu)率和表(biao)面(mian)電阻(zu)率或電導率,*符合**標(biao)準GB1410-2006固體(ti)(ti)(ti)電工(gong)絕緣(yuan)(yuan)材料(liao)絕緣(yuan)(yuan)電阻(zu)、體(ti)(ti)(ti)積(ji)電阻(zu)系數和表(biao)面(mian)電阻(zu)試(shi)驗(yan)方(fang)法(fa),ASTM D257 絕緣(yuan)(yuan)材料(liao)的直流電阻(zu)或電導試(shi)驗(yan)方(fang)法(fa)?等(deng)標(biao)準要求。
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