新版QJ57B數字直流雙臂電橋廠家現貨出售
QJ57B數字電橋是新一代電線、電纜直流電阻的測試儀器，是QJ44、QJ57的更新換代產品。電橋采用Σ―△型A/D轉換原理，具有測量精度高、數字濾波、快速平均及自動校準等特點。電橋采用5位半LED顯示，可直讀電阻測量數據,操作方便、攜帶方便、讀數直觀、測量精度高、穩定性好。還可以用來測試開關、接插件、繼電器的觸點電阻；車、船、飛機的金屬鉚接電阻。 
新版QJ57B數字直流雙臂電橋廠家現貨出售
一、 主要技術參數： 
1、測量范圍：0-200Ω 
2、zui小分辨率：1μΩ 
3、準確度：±（0.05%Rx+0.05%Rm） 
4、各量程主要參數見表1： 
（溫度20℃±0.5℃、相對濕度40%-60%） 
量程 測試電流 分辨率 測量范圍 基本誤差 
20mΩ 1A 1μΩ 0-20.000mΩ ±（0.1%Rx+0.15%Rm） 
200mΩ 0.5A 1μΩ 0-200.000mΩ ±（0.05%Rx+0.1%Rm） 
2Ω 100mA 10μΩ 0-2.00000Ω ±（0.05%Rx+0.05%Rm） 
20Ω 100mA 100μΩ 0-20.0000mΩ  
200Ω 10mA 1mΩ 0-200.000Ω  
備注：20mΩ檔為4位半顯示，200mΩ-200Ω檔為5位半顯示。 
5、電源：AC220V±22V50HZ±1.5HZ 
6、外形尺寸：383*296*166mm 
7、重量約：4Kg 

二、 操作方法 
1.將電源線插入AC220V插座，測試線接入電橋C2、P2、P1、C1 
2.將電橋的電源開關合上，電橋顯示“000000” 
3.選擇合適電阻量程（見表2） 
4.按下“測試鍵”，等數據穩定后，就是本次的測量數據，再按下“測試鍵”結束。 
主(zhu)要生產(chan)的產(chan)品(pin)有：電(dian)(dian)(dian)子(zi)萬(wan)能試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，電(dian)(dian)(dian)子(zi)拉力試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，微(wei)機(ji)(ji)(ji)控(kong)制電(dian)(dian)(dian)子(zi)萬(wan)能試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，微(wei)機(ji)(ji)(ji)控(kong)制電(dian)(dian)(dian)子(zi)拉力試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，換氣老化(hua)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)箱(xiang)，老化(hua)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)箱(xiang)，空氣彈(dan)氧彈(dan)老化(hua)箱(xiang)，氧指數(shu)測定儀(yi)，恒溫(wen)水浴，恒溫(wen)油浴，電(dian)(dian)(dian)壓擊穿(chuan)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)儀(yi)，耐(nai)高壓試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，灼熱絲試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)儀(yi)，針焰試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，漏電(dian)(dian)(dian)起痕試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，單(dan)根垂直(zhi)燃燒(shao)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，負載(zai)燃燒(shao)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，成束燃燒(shao)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，耐(nai)火試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，煙(yan)密度(du)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，垂直(zhi)水平燃燒(shao)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，熱穩(wen)定試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，二(er)三輪曲撓試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)機(ji)(ji)(ji)，交聯切(qie)片機，卷繞(rao)+扭(niu)轉(zhuan)試(shi)(shi)驗(yan)(yan)(yan)機，耐(nai)磨試(shi)(shi)驗(yan)(yan)(yan)機，高(gao)低溫試(shi)(shi)驗(yan)(yan)(yan)箱(xiang)，恒溫恒濕箱(xiang)，紫外老(lao)化(hua)(hua)箱(xiang)，臭氧老(lao)化(hua)(hua)箱(xiang)，氙(xian)燈老(lao)化(hua)(hua)箱(xiang)，刨(bao)片機等。