高壓電橋介電常數測試儀的工作原理以及維修保養方法
高(gao)壓電(dian)(dian)(dian)橋介(jie)電(dian)(dian)(dian)常數測試儀(yi)是由二只測微(wei)電(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)組(zu)成(cheng)，平板(ban)(ban)電(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)一般用來夾持被測樣(yang)品，園(yuan)(yuan)筒電(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)是一只分辨率高(gao)達0.0033pF的(de)線性(xing)可變(bian)電(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)，配用儀(yi)器(qi)(qi)(qi)(qi)(qi)作為指示(shi)儀(yi)器(qi)(qi)(qi)(qi)(qi)，絕緣(yuan)材料(liao)的(de)損耗(hao)角正切值(zhi)(zhi)是通過被測樣(yang)品放進(jin)(jin)平板(ban)(ban)電(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)和不放進(jin)(jin)樣(yang)品的(de)Q值(zhi)(zhi)變(bian)化(hua)，由園(yuan)(yuan)筒電(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)的(de)刻(ke)度讀值(zhi)(zhi)變(bian)化(hua)值(zhi)(zhi)而換算得到(dao)的(de)。同時，由平板(ban)(ban)電(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)的(de)刻(ke)度讀值(zhi)(zhi)變(bian)化(hua)而換算得到(dao)介(jie)電(dian)(dian)(dian)常數。
高壓電橋介電常數測試儀維修保養
高壓電橋介電常數測(ce)(ce)試儀(yi)是由精密(mi)機械構(gou)件組成的測(ce)(ce)微(wei)設備，所以在使用和保存(cun)時(shi)要(yao)(yao)避免振動和碰(peng)(peng)撞，要(yao)(yao)求在不(bu)含(han)腐蝕(shi)氣體和干(gan)燥的環(huan)境中使用和保存(cun)，不(bu)能(neng)(neng)自行拆裝，否(fou)則(ze)其(qi)工作(zuo)性能(neng)(neng)就不(bu)能(neng)(neng)保證，如(ru)測(ce)(ce)試夾具受到碰(peng)(peng)撞，或者(zhe)作(zuo)為(wei)定期檢(jian)查，要(yao)(yao)檢(jian)測(ce)(ce)以下幾個指標(biao)：
1. 平板電容器二極(ji)片平行度不超(chao)過0.02mm。
2. 園筒電容器的(de)軸和軸同心度(du)誤差不超(chao)過(guo)0.1mm。
3. 保(bao)證(zheng)二個測微(wei)桿0.01mm分辨率。
4. 用精密電(dian)(dian)容測量(liang)儀(yi)(±0.01pF分辨率(lv))測量(liang)園筒電(dian)(dian)容器，電(dian)(dian)容呈線性(xing)率(lv)，從(cong)0~20mm，每隔1mm測試一點，要求(qiu)符(fu)合工作特性(xing)要求(qiu)。
