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src="https://tyunfile.71360.com/UploadFile/szmdjd/637358930886699219/8398964.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="la8pryk" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>廣西毫歐表測接地,毫歐表</p><p><span>***更新：</span>2020-12-14 08:20:26</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="jtq2oel" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市茂迪機電設(shè)備有限公司</a></p><p><span>聯(lián)系人：</span>黃富強</p><p><span>郵箱: </span>fuqiang.huang@maodi.net</p><p><span>電話: </span>13509625980</p><p><span>傳真: </span>0755_</p><p><span>網(wǎng)址: </span>http://www.maodi.net</p><p><span>手機: </span>0755-83280136</p><p><span>地址: </span>深南大道6006號華豐大廈2803、2804</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="3r3rtq2" class="page-proshow02"><p class="title">詳細說明</p><div id="cgd8hoa" class="box"><p><p> 萬用表的毫伏檔測量做毫歐表用， </p> <p> <p> 常需要測量一些毫歐級的小電阻，萬用表的電阻檔直接無法測量，如果用恒流法來測量會很方便： </p> <p> 我用兩塊萬用表，一個直接穩(wěn)壓電源，來測量制作點焊機時次級回路的電阻很是方便，在待測電路兩端通以1A的直流電， </p> <p> 用萬用表的毫伏檔直接測量兩端電壓，廣西毫歐表測接地，讀出的毫伏數(shù)就是電路的毫歐值，如圖中所示，廣西毫歐表測接地，2.753MV，就是2.753毫歐。 </p> <p> <p> 沒恒流，雙表法也不錯 </p> <p> 測普通的10mA比較穩(wěn)定，廣西毫歐表測接地， </p> <p> 但有些工作在大電流的東西，實際到要1A測出來穩(wěn)定可靠（這是手持電橋不行的） </p> </p> 數(shù)字毫歐表的校對方法。廣西毫歐表測接地</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西毫歐表測接地,毫歐表" src="https://tyunfile.71360.com/UploadFile/szmdjd/637358930886699219/8398964.png"></div><p> 在正常使用時，給定的電流必須略大于吸合電流，這樣繼電器才能穩(wěn)定地工作。而對于線圈所加的工作電壓，一般不要超過額定工作電壓的，否則會產(chǎn)生較大的電流而把線圈燒毀。4、釋放電流是指繼電器產(chǎn)生釋放動作的**大電流。當(dāng)繼電器吸合狀態(tài)的電流減小到一定程度時，繼電器就會恢復(fù)到未通電的釋放狀態(tài)。這時的電流遠遠小于吸合電流。5、觸點切換電壓和電流是指繼電器允許加載的電壓和電流。它決定了繼電器能控制電壓和電流的大小，使用時不能超過此值，否則很容易損壞繼電器的觸點。繼電器測試1、測觸點電阻用***表的電阻檔，測量常閉觸點與動點電阻，其阻值應(yīng)為0，(用更加精確方式可測得觸點阻值在100毫歐以內(nèi))；而常開觸點與動點的阻值就為無窮大。由此可以區(qū)別出那個是常閉觸點，那個是常開觸點。2、測線圈電阻可用***表R×10Ω檔測量繼電器線圈的阻值，從而判斷該線圈是否存在著開路現(xiàn)象。3、測量吸合電壓和吸合電流找來可調(diào)穩(wěn)壓電源和電流表，給繼電器輸入一組電壓，且在供電回路中串入電流表進行監(jiān)測。慢慢調(diào)高電源電壓，聽到繼電器吸合聲時，記下該吸合電壓和吸合電流。為求準(zhǔn)確，可以試多幾次而求平均值。4、測量釋放電壓和釋放電流也是像上述那樣連接測試。廣西毫歐表測接地微電阻計或者稱為毫歐表的測量原理是什么?與普通萬用表有什么區(qū)別?</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西毫歐表測接地,毫歐表" src="https://tyunfile.71360.com/UploadFile/szmdjd/637358930969238281/9536197.png"></div><p> 毫歐表的使用方法： </p> <p> <br /> </p> <p> 操作步驟 </p> <p> （1）選擋：把選擇bai開關(guān)旋到歐姆擋上，并根du據(jù)估測電阻的大小zhi，選擇好選擇開關(guān)的量程。dao </p> <p> （2）調(diào)零：把兩支表筆相接觸，調(diào)整歐姆擋的調(diào)整旋鈕，使指針指在電阻刻度的零位上。(注意電阻擋的零位在刻度的右端) </p> <p> （3）測量(讀數(shù))：把兩支表筆分別與待測電阻的兩端相接，進行測量，指針示數(shù)乘以倍率數(shù)，即為待測電阻的阻值。 </p> <p> （4）實驗完畢，應(yīng)將兩表筆從插孔中拔出，并將選擇開關(guān)置于“OFF”擋或交流電壓比較高擋。如果歐姆表長期不用，應(yīng)取出表內(nèi)的電池。 </p> <p> （5）歐姆表內(nèi)電池的電動勢E，內(nèi)阻r，用久后會改變數(shù)值，會造成測量誤差變大。此時，測量電阻不夠準(zhǔn)確，較準(zhǔn)確測量電阻應(yīng)使用電路法。 </p> <p> 歐姆表是直接測量電阻值的儀表。它是根據(jù)閉合電路的歐姆定律制成的。 </p> <p> <br /> </p> <p> <br /> </p><p style="text-indent:25px">1.毫歐級電阻測量電路，該毫歐級電阻測量電路由基本恒流源電路、擴流電路和放大與顯示電路連接構(gòu)成；采用四線制測量，測量時以恒定電流通過被測電阻，然后將被測電阻端電壓放大，經(jīng)A/D轉(zhuǎn)換后顯示被測電阻數(shù)值；其特征是它的具體電路連接如下：恒壓源IC0（型號為REF3025）的輸入端接電源+Vcc，輸出端V0串聯(lián)電阻R0后接B點，GND端懸浮地，接運放IC1（型號為OPA335）的輸出端，運放IC1接成電壓跟隨器，反相輸入端（-）接其輸出端，同相輸入端（+）接B點，B點串聯(lián)電阻Rn后接E點；運放IC2（型號為OPA335）接成比較器，其同相輸入端（+）接B點，輸出端串聯(lián)電阻R1后接達林頓三極管TR（型號為TIP122）的基極，反相輸入端（-）接三極管TR的發(fā)射極，三極管TR的集電極接+Vcc，另外三極管TR的發(fā)射極串聯(lián)電阻Rs后接E點；被測電阻Rx一端接E點并經(jīng)電阻R2后接運放IC3的同相輸入端（+），IC3的同相輸入端（+）同時接電阻R5的一端，電阻R5的另一端接地，被測電阻Rx的另一端接地并經(jīng)電阻R3后接運放IC3的反相輸入端（-），IC3的反相輸入端（-）同時接電阻R4至其輸出端，IC3的輸出端接市售四位半LED數(shù)字顯示電壓表頭VM的模擬電壓輸入端Vi，電壓表頭VM內(nèi)含A/D轉(zhuǎn)換電路毫歐表的使用規(guī)范，及測量范圍。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西毫歐表測接地,毫歐表" src="https://tyunfile.71360.com/UploadFile/szmdjd/637360195378652344/3580568.png"></div><p> 自動手動選擇平均值自動平均值顯示，并且顯示正向和方向的電流測量值測試終端4mm標(biāo)準(zhǔn)插孔。接口USB或RS232校準(zhǔn)數(shù)字校準(zhǔn)，安全鍵保護。工作溫度0℃到+40℃，相對濕度80%**大非凝固儲存溫度-20℃到+50℃交流電源90-253V/AC，47-63Hz電池裝有鎳氫電池包，可監(jiān)控電池容量。內(nèi)置自動快速/慢速電池充電器，直流輸入從9V到36V。安全標(biāo)準(zhǔn)IEC61010-1/EN61010-1，CATⅢ600V尺寸358×269×155mm重量約5kg標(biāo)準(zhǔn)配置：DO7Plus數(shù)字微歐表1臺標(biāo)準(zhǔn)測試線1套（見附圖）USB和RS232數(shù)據(jù)線各1根軟件光盤1張充電電源線1根中英文使用手冊1套出廠檢驗證書一份標(biāo)準(zhǔn)配置測試線夾1套選配件：Pt100溫度補償傳感器（訂購編號：Pt02-DO7Plus）電阻儀選型數(shù)據(jù)表測試線夾選購深圳市茂迪機電設(shè)備有限公司。高美測儀一體式絕緣和毫歐萬用表。廣西毫歐表測接地</p><p style="text-indent:25px">符合EN 61557-4 / VDE 0413第4部分對于接地，保護和等電位連接導(dǎo)體的低電阻測量。廣西毫歐表測接地</p><p> 防爆環(huán)境**毫歐表 METRAHIT 27EX </p> <p> 深圳市茂迪機電設(shè)備有限公司常備設(shè)備，現(xiàn)貨供應(yīng)，深圳茂迪作為中國區(qū)一級代理，大量備貨，性價比高。 </p> <p> Metrahit 27EX精密微歐表適用于測量易爆環(huán)境低阻值接觸電阻，例如飛機燃料箱內(nèi)連接處（Bonding 檢測）的接觸電阻，以及飛機內(nèi)外部一些潛在的環(huán)境，也可測量飛機外表部分的接觸電阻（防雷和油芯測試）。 </p> <p> <p> ■ 量程：30mΩ,300mΩ,3Ω,30Ω </p> <p> ■ 分辨率：10Ω </p> <p> ■ 測試方法：開爾文四線法 </p> <p> ■ 數(shù)據(jù)保持存儲：1200 組 </p> <p> ■ EX 等級：Ex II 2 G Ex ia IIA T4 Gb </p> <p> ■ 原型試驗證書編號：INERI05ATEX0040 </p> <p> ■ DAkkS 認證報告 </p> <p> ■ 標(biāo)配附件：卡爾文探針, 開爾文夾, **電池,保護套, 便攜箱 </p> <p> ■ 質(zhì)保：3 年內(nèi)（非人為原因） </p> 廣西毫歐表測接地</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2400749.html</p></div></div></div></div></div><div id="v7hzmeg" class="page-right twoColRt"><div id="tam7ikh" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="keboacj" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="cr8yqx2" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" 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