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style="font-family:宋體">目前，電力系統(tǒng)中普遍采用常規(guī)的</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">QJ44</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">型雙臂直流電橋測量接觸電阻，而這類電橋的測試電流僅</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">mA</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">級，難以發(fā)現回路導體截面積減少的缺陷。在測量高壓開關導電回路接觸電阻時，由于受觸頭之間油膜和氧化層的影響，測量值偏大若干倍，無法真實的反映接觸電阻值。為此，電力部標準</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">SD301—88</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">《交流</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">500</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">k</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">V</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">電力設備交接和預防性試驗規(guī)程》和新版《電力設備預防性試驗規(guī)程》作出對斷路器、隔離開關接觸電阻的測量電流不小于直流</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">100A</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">的規(guī)定，以確保試驗結果準確。</span></span></p><p style="margin-left:-5.2500pt; margin-right:-5.2500pt"><span style="font-size:16.0000pt"><span style="font-family:arial"><img alt="" src="http://img57.chem17.com/9/20171103/636452925612680693911.jpg" style="height:610px; width:800px" /></span></span></p><p style="margin-left:-5.2500pt; margin-right:-5.2500pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">HLY-100C智能回路電阻測試儀</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">是根據中華人民共和國電力執(zhí)行標準</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">DL/T845.4-2004</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">，采用高頻開關電源技術和數字電路技術相結合設計而成。它適用于開關控制設備回路電阻的測量。其測試電流采用國家標準推薦的直流</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">100A</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">。</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">可在</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">直</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">流</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">100A</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">的情況下直接測得回路電阻，zui后的測試結果用</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">大屏幕液晶LCD顯示，并有數據存儲、輸出打印、時間設置等功能</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">。</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">另有50A檔位供用戶選擇。</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">該儀器測量準確、性能穩(wěn)定，符合電力、供電部門現場高壓開關維修和高壓開關廠回路電阻測試的要求。</span></span></p><h1><strong><span style="font-size:16pt"><span style="font-family:宋體">二、用途</span></span></strong></h1><p style="margin-right:-5.2500pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">HLY-100C智能回路電阻測試儀</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">適用于高壓開關接觸（回路）電阻的高精度測量，同樣適用于其它需要大電流、微電阻測量的場合。</span></span></p><h1><strong><span style="font-size:16pt"><span style="font-family:宋體">三、性能特點</span></span></strong></h1><ul style="list-style-type:square"><li><span style="font-size:16.0000pt"><span style="font-family:宋體">大電流：采用開關電源技術，能長時間連續(xù)輸出大電流，克服了脈沖式電源瞬間電流的弊端，可以有效的擊穿開關觸頭氧化膜，得到良好的測試結果。</span></span></li><li><span style="font-size:16.0000pt"><span style="font-family:宋體">高穩(wěn)定性：在嚴重干擾條件下，液晶屏zui后一位數據能穩(wěn)定在±1個字范圍內，讀數穩(wěn)定，重復性好。</span></span></li><li><span style="font-size:16.0000pt"><span style="font-family:宋體">高精度：采用雙路高速</span></span><strong><span style="color:#FF0000"><span style="font-size:16.0000pt"><span style="font-family:arial">16</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">位</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">Σ－Δ</span></span></span></strong><span style="font-size:16.0000pt"><span style="font-family:宋體"><strong><span style="color:#FF0000"> </span></strong>AD采樣，數字信號處理技術，</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">zui高分辨力達到</span></span><strong><span style="color:#FF0000"><span style="font-size:16.0000pt"><span style="font-family:arial">0.01μΩ</span></span></span></strong><span style="font-size:16.0000pt"><span style="font-family:宋體">，</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">是</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">目前</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">國內能達到</span></span><span style="color:#FF0000"><strong><span style="font-size:16.0000pt"><span style="font-family:arial">0.01μΩ</span></span></strong></span><span style="font-size:16.0000pt"><span style="font-family:宋體">分辨</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">力</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">且十分穩(wěn)定的接觸電阻測試儀，性能超過了進口大電流微歐計。</span></span></li><li><span style="font-size:16.0000pt"><span style="font-family:宋體">智能化：</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">使用</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">進口</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">高性能</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">CPU</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">，測量時系統(tǒng)根據信號大小自動切換</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">量程</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">，確保了該產品的測試準確度。</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">過溫保護電路能夠在儀器超過設定溫度時自動停止輸出電流，確保儀器的安全使用。</span></span></li><li><span style="font-size:16.0000pt"><span style="font-family:宋體">高品質：關鍵部件全部采用進口元件，通過巧妙設計的溫度補償電路有效的消除環(huán)境溫度對測量結果的影響，接插件的使用增強了抗振性能。</span></span></li><li><span style="font-size:16.0000pt"><span style="font-family:宋體">功能強大：電流可在</span></span><span style="color:#FF0000"><strong><span style="font-size:16.0000pt"><span style="font-family:arial">50A</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">，</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">100A</span></span></strong></span><span style="font-size:16.0000pt"><span style="font-family:宋體">中自由選擇，測試時間可在5s~599s內任意設定，克服了其他同類儀器無法設定測量時間或連續(xù)工作時間過短的缺陷，遠遠超過了其他同類儀器的性能。</span></span></li><li><span style="font-size:16.0000pt"><span style="font-family:宋體">人機界面友好：通過旋轉鼠標輸入數據，方便快捷，</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">可以自主設置儀器日期、時間，實時保存測量數據，即時打印測量結果。</span></span></li><li><span style="font-size:16.0000pt"><span style="font-family:宋體">多種通信方式：能夠通過</span></span><span style="color:#FF0000"><span style="font-size:16.0000pt"><span style="font-family:arial">RS232</span></span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">串口</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">(9針)</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">或</span></span><strong><span style="color:#FF0000"><span style="font-size:16.0000pt"><span style="font-family:arial">USB</span></span></span></strong><span style="font-size:16.0000pt"><span style="font-family:宋體">數據線與計算機通信，將測量數據上傳至計算機，供試驗人員進一步分析處理。</span></span></li></ul><p style="margin-right:-5.2500pt"><span style="font-size:16.0000pt"><span style="font-family:arial">(9)</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">使用方便：體積小、重量輕，便于攜帶。</span></span></p><h1><strong><span style="font-size:16pt"><span style="font-family:宋體">四、技術指標</span></span></strong></h1><p style="margin-left:44.8pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">1、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">測量范圍：</span></span><strong><span style="color:#FF0000"><span style="font-size:16.0000pt"><span style="font-family:arial">0～2999</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">.9</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">μΩ</span></span></span></strong></p><p style="margin-left:44.8pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">2、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">分辨</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">力</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">：</span></span><span style="color:#FF0000"><strong><span style="font-size:16.0000pt"><span style="font-family:宋體">0~99.99，</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">0.01μΩ</span></span></strong></span><span style="font-size:16.0000pt"><span style="font-family:宋體">；</span></span></p><p style="margin-left:26.95pt"><span style="font-size:16.0000pt"><span style="font-family:宋體"> <span style="color:#FF0000"><strong>100.0~2999.9，0.1</strong></span></span></span><span style="color:#FF0000"><strong><span style="font-size:16.0000pt"><span style="font-family:arial">μΩ</span></span></strong></span></p><p style="margin-left:44.8pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">3、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">測試電流：</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">DC50A</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">、</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">100A</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">兩</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">檔固定輸出</span></span></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">4、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">測</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">量精度：</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">±</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">(</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">0.5% rd+2d</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">)</span></span></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">5、 </span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">連續(xù)工作時間：5s~599s</span></span></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">6、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">顯示方式：</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">大屏幕中文液晶顯示</span></span></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">7、 </span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">通信方式： USB或RS232串口</span></span></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">8、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">工作電源：</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">AC220V±10% 50Hz</span></span></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">9、 </span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">整機功率：600W</span></span></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">10、 </span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">zui大存儲記錄：200條</span></span></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">11、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">工作環(huán)境：溫度</span></span><strong><span style="color:#FF0000"><span style="font-size:12.0000pt"><span style="font-family:arial">－</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">10</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">℃</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">～40</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">℃</span></span> <span style="font-size:16.0000pt"><span style="font-family:arial">濕度</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">≤80 %RH</span></span></span></strong></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">12、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">體</span></span> <span style="font-size:16.0000pt"><span style="font-family:arial">積：</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">380×300×260 mm</span></span><sup><span style="font-size:16.0000pt"><span style="font-family:arial">3</span></span></sup></p><p style="margin-left:45pt"><span style="font-size:16.0000pt"><span style="font-family:宋體">13、 </span></span><span style="font-size:16.0000pt"><span style="font-family:arial">重</span></span> <span style="font-size:16.0000pt"><span style="font-family:arial">量：</span></span><strong><span style="color:#FF0000"><span style="font-size:16.0000pt"><span style="font-family:宋體">6</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">kg</span></span></span></strong><span style="font-size:16.0000pt"><span style="font-family:arial">（不含附件）</span></span></p><h1><strong><span style="font-size:16pt"><span style="font-family:宋體">五、面板結構</span></span></strong></h1><p style="margin-right:-5.2500pt; text-align:center"><img alt="" src="http://img57.chem17.com/9/20171103/636452917847767054985.png" style="height:440px; width:588px" /> </p><p style="text-align:center"><span style="font-size:15.0000pt"><span style="font-family:宋體">圖1 面板布局圖</span></span></p><table align="center" style="border-collapse:collapse; width:568px"><tbody><tr><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">1</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、</span></span><span style="font-size:15.0000pt"><span style="font-family:宋體">打印機</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">2</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、接地</span></span><span style="font-size:15.0000pt"><span style="font-family:宋體">柱</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">3</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、電流輸出</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">I</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">＋</span></span></p></td></tr><tr><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">4</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、測量輸入</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">V</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">＋</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">5</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、測量輸入</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">V</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">－</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">6</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、電流輸出</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">I</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">－</span></span></p></td></tr><tr><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">7</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、</span></span><span style="font-size:15.0000pt"><span style="font-family:宋體">對比度調節(jié)</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">8</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、</span></span><span style="font-size:15.0000pt"><span style="font-family:宋體">旋轉鼠標</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">9</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、</span></span><span style="font-size:15.0000pt"><span style="font-family:宋體">復位按鈕</span></span></p></td></tr><tr><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:arial">10</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">、</span></span><span style="font-size:15.0000pt"><span style="font-family:宋體">液晶屏</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:宋體">11、</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">電源開關</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:宋體">12、</span></span><span style="font-size:15.0000pt"><span style="font-family:arial">電源插座</span></span></p></td></tr><tr><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:宋體">13、RS232接口</span></span></p></td><td style="vertical-align:top; width:189px"><p><span style="font-size:15.0000pt"><span style="font-family:宋體">14、USB接口</span></span></p></td><td style="vertical-align:top; width:189px"><p> </p></td></tr></tbody></table><h1><strong><span style="font-size:16pt"><span style="font-family:宋體">六、工作原理</span></span></strong></h1><p><span style="font-size:16.0000pt"><span style="font-family:宋體">本儀器</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">采用電流電壓法測試原理，也稱四線法測試技術，原理方框圖見圖</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">2</span></span><span style="font-size:16.0000pt"><span style="font-family:宋體">。</span></span></p><p> <img alt="" src="http://img58.chem17.com/9/20171103/636452919469077902199.png" style="height:199px; width:526px" /></p><table align="center" style="border-collapse:collapse; width:568px"><tbody></tbody></table><p style="text-align:center"> </p><p style="text-align:center"><span style="font-size:16.0000pt"><span style="font-family:arial">圖</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">2</span></span> <span style="font-size:16.0000pt"><span style="font-family:宋體"> 測試原理圖</span></span></p><p><span style="font-size:16.0000pt"><span style="font-family:arial">電流源輸出恒定電流流過標準電阻</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">R</span></span><sub><span style="font-size:16.0000pt"><span style="font-family:arial">0</span></span></sub><span style="font-size:16.0000pt"><span style="font-family:arial">和</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">待測電阻</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">Rx。采樣</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">標準電阻</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">R</span></span><sub><span style="font-size:16.0000pt"><span style="font-family:arial">0</span></span></sub><span style="font-size:16.0000pt"><span style="font-family:arial">上的電壓信號</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">U</span></span><sub><span style="font-size:16.0000pt"><span style="font-family:arial">0</span></span></sub><span style="font-size:16.0000pt"><span style="font-family:arial">，經濾波放大處理后送入</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">AD</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">轉換為數字量，進而計算出電流值</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">I，見公式（1）</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">。同樣，</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">采樣</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">待測電阻</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">Rx</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">上的電壓信號</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">Ux</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">，經濾波、多級放大處理后送入</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">AD</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">轉換為數字量，通過公式</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">（2）</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">計算出電阻值</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">Rx。</span></span></p><p><img alt="" src="http://img57.chem17.com/9/20171103/636452919889186640215.png" style="height:59px; width:63px" /> <span style="font-size:16.0000pt"><span style="font-family:arial">（</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">1</span></span><span style="font-size:16.0000pt"><span style="font-family:arial">）</span></span></p><p> <img alt="" src="http://img57.chem17.com/9/20171103/636452920288235341439.png" style="height:53px; width:74px" /> <span 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