5.1.硬(ying)件連接(jie)(jie)(jie)與操(cao)(cao)(cao)作步驟1)事(shi)先準備好(hao)要求(qiu)測(ce)(ce)試(shi)(shi)的(de)PCB樣品(pin)，接(jie)(jie)(jie)好(hao)測(ce)(ce)試(shi)(shi)線，插入相對應(ying)的(de)航空(kong)座。2)把納伏表(biao)和(he)可編程(cheng)電(dian)源安裝好(hao)，連接(jie)(jie)(jie)儀(yi)器與計算機(ji)通(tong)信線。3)接(jie)(jie)(jie)好(hao)機(ji)柜電(dian)源，并檢(jian)(jian)查儀(yi)器是(shi)否有錯誤(wu)(wu)提示，如(ru)有提示需(xu)先按(an)照儀(yi)器說明把錯誤(wu)(wu)提示排除。4)根據軟(ruan)(ruan)件操(cao)(cao)(cao)作設置開(kai)(kai)始測(ce)(ce)試(shi)(shi)流程(cheng)。注意(yi)：※在測(ce)(ce)試(shi)(shi)的(de)過程(cheng)禁止(zhi)(zhi)觸(chu)摸被測(ce)(ce)物品(pin)。※禁止(zhi)(zhi)帶(dai)電(dian)拔插測(ce)(ce)試(shi)(shi)線的(de)航空(kong)頭(tou)。※如(ru)需(xu)設備檢(jian)(jian)修(xiu)必須把電(dian)斷開(kai)(kai)。本系(xi)統(tong)只提供(gong)自(zi)有版(ban)權(quan)的(de)導通(tong)電(dian)阻實(shi)時監(jian)控(kong)測(ce)(ce)試(shi)(shi)操(cao)(cao)(cao)作軟(ruan)(ruan)件，Windows操(cao)(cao)(cao)作系(xi)統(tong)、MS-office軟(ruan)(ruan)件及(ji)相關數(shu)據庫(ku)由(you)客戶(hu)自(zi)行購買*該(gai)系(xi)統(tong)可根據客戶(hu)的(de)不(bu)同需(xu)求(qiu)，定制(zhi)特殊要求(qiu)以實(shi)現更多(duo)功能智能電(dian)阻具(ju)有高精度的(de)特點。江西供(gong)應(ying)電(dian)阻測(ce)(ce)試(shi)(shi)服務電(dian)話(hua)

試(shi)(shi)驗通道(dao)(dao)(dao)(dao)(dao)數(shu)1-256通道(dao)(dao)(dao)(dao)(dao)試(shi)(shi)驗時(shi)間0---9999小時(shi)（可(ke)以(yi)任意(yi)設定(ding)）低阻(zu)測(ce)試(shi)(shi)測(ce)試(shi)(shi)范(fan)圍(wei)1mΩ---103Ω測(ce)量(liang)精(jing)度(du)(du)±（1%RD+10μΩ）**小分辨率1μΩ測(ce)試(shi)(shi)電(dian)(dian)流(liu)0.05-3.00(A)測(ce)試(shi)(shi)速度(du)(du)≦0.5秒/通道(dao)(dao)(dao)(dao)(dao)測(ce)試(shi)(shi)時(shi)分組16通道(dao)(dao)(dao)(dao)(dao)/組，各組所有(you)參數(shu)可(ke)以(yi)**設置高(gao)、低溫(wen)區(qu)限值(zhi)(zhi)可(ke)分別任意(yi)設置電(dian)(dian)阻(zu)測(ce)試(shi)(shi)模式(shi)定(ding)時(shi)觸(chu)發、溫(wen)度(du)(du)觸(chu)發測(ce)試(shi)(shi)數(shu)據(ju)輸出(chu)圖表，EXCEL，TXT等格式(shi)，溫(wen)度(du)(du)和阻(zu)值(zhi)(zhi)曲線可(ke)重(zhong)疊顯示。超限報警(jing)可(ke)設定(ding)配件測(ce)試(shi)(shi)電(dian)(dian)纜(lan)PTFE耐高(gao)溫(wen)電(dian)(dian)纜(lan)溫(wen)度(du)(du)監測(ce)0-4通道(dao)(dao)(dao)(dao)(dao)溫(wen)度(du)(du)監測(ce)選件溫(wen)度(du)(du)范(fan)圍(wei)：-70℃~+200℃，精(jing)度(du)(du)±1℃*本系(xi)(xi)統(tong)只(zhi)提供自有(you)版權的導通電(dian)(dian)阻(zu)實時(shi)監控測(ce)試(shi)(shi)操作軟件，Windows操作系(xi)(xi)統(tong)、MS-office軟件及相關數(shu)據(ju)庫由客戶自行購買(mai)*該系(xi)(xi)統(tong)可(ke)根據(ju)客戶的不(bu)同需(xu)求，定(ding)制特(te)殊要求以(yi)實現更多功能廣西(xi)銷售(shou)電(dian)(dian)阻(zu)測(ce)試(shi)(shi)服務電(dian)(dian)話智能電(dian)(dian)阻(zu)可(ke)以(yi)直接(jie)(jie)通過連接(jie)(jie)到計算機或移(yi)動設備(bei)上進行測(ce)試(shi)(shi)。

NO.3PCB制程(cheng)(cheng)鉆孔(kong)(kong)鉆孔(kong)(kong)參(can)數(shu)(shu)不(bu)當或鉆針(zhen)研磨次數(shu)(shu)太多會導致孔(kong)(kong)壁表面(mian)凹(ao)(ao)凸起伏(fu)大。在化學濕加工過程(cheng)(cheng)中，表面(mian)凹(ao)(ao)陷之處易聚(ju)集(ji)或包覆金屬鹽類(lei)溶液(ye)，易滲(shen)入到薄弱(ruo)結合(he)部的(de)(de)(de)細微(wei)裂縫(feng)中，從而(er)導致出現CAF的(de)(de)(de)可靠(kao)性問題。因此(ci)需選(xuan)擇(ze)較(jiao)合(he)適的(de)(de)(de)鉆孔(kong)(kong)參(can)數(shu)(shu)和較(jiao)新的(de)(de)(de)鉆針(zhen)，以確(que)(que)保鉆孔(kong)(kong)的(de)(de)(de)質(zhi)(zhi)量。除(chu)膠(jiao)渣(zha)除(chu)膠(jiao)渣(zha)若參(can)數(shu)(shu)選(xuan)擇(ze)不(bu)當，除(chu)膠(jiao)不(bu)凈會影(ying)響電鍍的(de)(de)(de)質(zhi)(zhi)量，增加CAF失效的(de)(de)(de)機會。因此(ci)根(gen)據不(bu)同類(lei)型材料需選(xuan)擇(ze)合(he)適的(de)(de)(de)除(chu)膠(jiao)參(can)數(shu)(shu)。壓合(he)需要選(xuan)擇(ze)合(he)適的(de)(de)(de)壓合(he)程(cheng)(cheng)序，尤(you)其(qi)是多層(ceng)板要注意層(ceng)壓參(can)數(shu)(shu)的(de)(de)(de)匹配(pei)性，確(que)(que)保壓合(he)的(de)(de)(de)質(zhi)(zhi)量。

定義CAF又稱導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)性(xing)陽(yang)極(ji)絲(si)，是(shi)指印刷電(dian)(dian)(dian)(dian)路(lu)(lu)板(ban)電(dian)(dian)(dian)(dian)極(ji)間(jian)由于(yu)吸(xi)濕作用，吸(xi)附水(shui)分(fen)(fen)后加入(ru)電(dian)(dian)(dian)(dian)場(chang)金屬離(li)(li)子(zi)(zi)沿玻纖紗從一金屬電(dian)(dian)(dian)(dian)極(ji)向另(ling)一金屬電(dian)(dian)(dian)(dian)極(ji)移動時，分(fen)(fen)析(xi)出金屬與化(hua)(hua)合物的(de)(de)(de)現象。CAF現象會導(dao)(dao)(dao)致(zhi)絕緣層(ceng)(ceng)劣化(hua)(hua)。背(bei)景(jing)當(dang)前(qian)，無(wu)論是(shi)多層(ceng)(ceng)板(ban)的(de)(de)(de)層(ceng)(ceng)數還是(shi)通孔的(de)(de)(de)孔徑，無(wu)論是(shi)布線(xian)寬度還是(shi)線(xian)距(ju)(ju)(ju)(ju)，都趨于(yu)細(xi)微化(hua)(hua)。由于(yu)絕緣距(ju)(ju)(ju)(ju)離(li)(li)的(de)(de)(de)縮短(duan)以(yi)及電(dian)(dian)(dian)(dian)子(zi)(zi)設備便攜(xie)化(hua)(hua)的(de)(de)(de)影響(xiang)，導(dao)(dao)(dao)致(zhi)電(dian)(dian)(dian)(dian)路(lu)(lu)板(ban)容易(yi)發(fa)生吸(xi)濕現象，進而發(fa)生離(li)(li)子(zi)(zi)遷移。同(tong)時，當(dang)電(dian)(dian)(dian)(dian)路(lu)(lu)板(ban)發(fa)生離(li)(li)子(zi)(zi)遷移后，短(duan)時間(jian)內極(ji)易(yi)產生故(gu)障(zhang)。待測(ce)PCB其正負兩(liang)極(ji)間(jian)絕緣距(ju)(ju)(ju)(ju)離(li)(li)之(zhi)規格分(fen)(fen)別(bie)為(wei)：兩(liang)通孔銅(tong)壁(bi)間(jian)的(de)(de)(de)距(ju)(ju)(ju)(ju)離(li)(li)為(wei)(26mil)孔銅(tong)壁(bi)到(dao)內層(ceng)(ceng)**近(jin)(jin)銅(tong)導(dao)(dao)(dao)體(ti)的(de)(de)(de)距(ju)(ju)(ju)(ju)離(li)(li)為(wei)()孔環到(dao)外層(ceng)(ceng)**近(jin)(jin)導(dao)(dao)(dao)體(ti)的(de)(de)(de)距(ju)(ju)(ju)(ju)離(li)(li)為(wei)()。四線(xian)法（Four-Wire Method），也被稱為(wei)Kelvin四線(xian)法或Kelvin連(lian)接法，是(shi)一種用于(yu)測(ce)量電(dian)(dian)(dian)(dian)阻的(de)(de)(de)方(fang)法。

為(wei)了評估PCB板(ban)的(de)絕緣(yuan)(yuan)(yuan)(yuan)(yuan)性能(neng)，可(ke)以進(jin)行(xing)離(li)子(zi)(zi)遷(qian)移(yi)(yi)測(ce)(ce)(ce)(ce)試(shi)。這項(xiang)測(ce)(ce)(ce)(ce)試(shi)主(zhu)要(yao)通過(guo)測(ce)(ce)(ce)(ce)量(liang)PCB板(ban)上的(de)絕緣(yuan)(yuan)(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)來評估其絕緣(yuan)(yuan)(yuan)(yuan)(yuan)性能(neng)。絕緣(yuan)(yuan)(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)是指在(zai)(zai)特定的(de)電(dian)(dian)(dian)壓下(xia)(xia)，單位面積上的(de)電(dian)(dian)(dian)流(liu)(liu)流(liu)(liu)過(guo)的(de)電(dian)(dian)(dian)阻(zu)(zu)。通過(guo)測(ce)(ce)(ce)(ce)量(liang)絕緣(yuan)(yuan)(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)，可(ke)以判斷PCB板(ban)的(de)絕緣(yuan)(yuan)(yuan)(yuan)(yuan)性能(neng)是否符合(he)要(yao)求。在(zai)(zai)進(jin)行(xing)離(li)子(zi)(zi)遷(qian)移(yi)(yi)測(ce)(ce)(ce)(ce)試(shi)時，需(xu)要(yao)使(shi)(shi)用的(de)測(ce)(ce)(ce)(ce)試(shi)設(she)備(bei)。首先(xian)，將PCB板(ban)放置在(zai)(zai)測(ce)(ce)(ce)(ce)試(shi)設(she)備(bei)上，并施加一定的(de)電(dian)(dian)(dian)壓。然(ran)后，測(ce)(ce)(ce)(ce)量(liang)電(dian)(dian)(dian)流(liu)(liu)流(liu)(liu)過(guo)的(de)電(dian)(dian)(dian)阻(zu)(zu)，以確定絕緣(yuan)(yuan)(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)的(de)大小。如(ru)果絕緣(yuan)(yuan)(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)低(di)于(yu)規定的(de)標(biao)準(zhun)值(zhi)，就說(shuo)明PCB板(ban)的(de)絕緣(yuan)(yuan)(yuan)(yuan)(yuan)性能(neng)不達標(biao)，需(xu)要(yao)進(jin)行(xing)進(jin)一步的(de)處理或更換(huan)。從而(er)使(shi)(shi)絕緣(yuan)(yuan)(yuan)(yuan)(yuan)體(ti)處于(yu)離(li)子(zi)(zi)導(dao)電(dian)(dian)(dian)狀態。顯然(ran)，這將使(shi)(shi)絕緣(yuan)(yuan)(yuan)(yuan)(yuan)體(ti)的(de)絕緣(yuan)(yuan)(yuan)(yuan)(yuan)性能(neng)下(xia)(xia)降甚至成為(wei)導(dao)體(ti)而(er)造成短(duan)路(lu)故(gu)障。江蘇離(li)子(zi)(zi)遷(qian)移(yi)(yi)電(dian)(dian)(dian)阻(zu)(zu)測(ce)(ce)(ce)(ce)試(shi)服務

很多用戶在使用電阻測試(shi)設備過(guo)程中(zhong)會遇到各種問題(ti)。江西供應電阻測試(shi)服務電話

在進行電(dian)(dian)阻測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)時，需(xu)要(yao)(yao)注意一(yi)些關鍵的(de)(de)(de)(de)(de)(de)因(yin)素，以(yi)確(que)保測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)結(jie)果的(de)(de)(de)(de)(de)(de)準確(que)性(xing)(xing)(xing)(xing)。首先，測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)儀器的(de)(de)(de)(de)(de)(de)選(xuan)(xuan)擇(ze)(ze)非常重要(yao)(yao)，應(ying)選(xuan)(xuan)擇(ze)(ze)具有(you)高精度和(he)(he)穩(wen)定性(xing)(xing)(xing)(xing)的(de)(de)(de)(de)(de)(de)測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)儀器。其次，測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)環境的(de)(de)(de)(de)(de)(de)控制也很重要(yao)(yao)，應(ying)盡量避免干擾和(he)(he)噪聲的(de)(de)(de)(de)(de)(de)影響。，測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)方法(fa)的(de)(de)(de)(de)(de)(de)選(xuan)(xuan)擇(ze)(ze)也需(xu)要(yao)(yao)根據具體的(de)(de)(de)(de)(de)(de)測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)需(xu)求(qiu)進行，以(yi)確(que)保測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)結(jie)果的(de)(de)(de)(de)(de)(de)可靠性(xing)(xing)(xing)(xing)和(he)(he)準確(que)性(xing)(xing)(xing)(xing)，電(dian)(dian)阻測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)是電(dian)(dian)子工(gong)程(cheng)中不(bu)可或缺的(de)(de)(de)(de)(de)(de)一(yi)部分。不(bu)同的(de)(de)(de)(de)(de)(de)電(dian)(dian)阻測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)方法(fa)適用(yong)于不(bu)同的(de)(de)(de)(de)(de)(de)測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)需(xu)求(qiu)，可以(yi)幫助工(gong)程(cheng)師(shi)評估(gu)電(dian)(dian)路性(xing)(xing)(xing)(xing)能和(he)(he)改進產品設計(ji)。在進行電(dian)(dian)阻測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)時，需(xu)要(yao)(yao)注意測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)儀器的(de)(de)(de)(de)(de)(de)選(xuan)(xuan)擇(ze)(ze)、測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)環境的(de)(de)(de)(de)(de)(de)控制和(he)(he)測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)方法(fa)的(de)(de)(de)(de)(de)(de)選(xuan)(xuan)擇(ze)(ze)，以(yi)確(que)保測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)結(jie)果的(de)(de)(de)(de)(de)(de)準確(que)性(xing)(xing)(xing)(xing)和(he)(he)可靠性(xing)(xing)(xing)(xing)。希望(wang)本文對讀者(zhe)了解電(dian)(dian)阻測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)種類和(he)(he)應(ying)用(yong)有(you)所(suo)幫助。江西供應(ying)電(dian)(dian)阻測(ce)(ce)試(shi)(shi)(shi)(shi)(shi)服務電(dian)(dian)話

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