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。