明泰電(dian)(dian)氣(qi)（蘇州）有限公(gong)司(si)是正(zheng)(zheng)泰集(ji)團在蘇州地區一(yi)家授權的(de)經銷企業，連續(xu)十年銷量居正(zheng)(zheng)泰營銷網絡名，公(gong)司(si)主(zhu)要經營“正(zheng)(zheng)泰”牌(pai)配電(dian)(dian)電(dian)(dian)器、控制電(dian)(dian)器、終(zhong)端(duan)電(dian)(dian)器、電(dian)(dian)源(yuan)電(dian)(dian)器、電(dian)(dian)力電(dian)(dian)子(zi)、儀器儀表、建筑電(dian)(dian)器、高(gao)壓電(dian)(dian)器及成套設備(bei)。

改裝(zhuang)大(da)小所需電阻(zu)(zu)阻(zu)(zu)值(zhi)有個公式：R1=R/[（I1/I）-1]，其中R1是改裝(zhuang)時(shi)所需的電阻(zu)(zu)阻(zu)(zu)值(zhi)，R是靈敏電流(liu)(liu)計的線圈阻(zu)(zu)值(zhi)，I1是改裝(zhuang)后電流(liu)(liu)表醉(zui)大(da)量程，I是靈敏電流(liu)(liu)計醉(zui)大(da)量程。

學生用(yong)電流表(biao)有兩個量程，也(ye)就(jiu)是(shi)有兩個電阻(zu)；指(zhi)針式萬(wan)用(yong)表(biao)上的量程選擇實際是(shi)電位器。

電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)是根據通電(dian)(dian)(dian)(dian)(dian)導體(ti)在(zai)(zai)磁(ci)(ci)場中受磁(ci)(ci)場力(li)的(de)(de)作用(yong)而制成(cheng)的(de)(de)。電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)內部有一(yi)(yi)(yi)永磁(ci)(ci)體(ti)，正(zheng)泰(tai)(tai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)哪家(jia)好(hao)，在(zai)(zai)極間產(chan)生磁(ci)(ci)場，在(zai)(zai)磁(ci)(ci)場中有一(yi)(yi)(yi)個(ge)線圈(quan)，線圈(quan)兩(liang)端(duan)各有一(yi)(yi)(yi)個(ge)游絲彈(dan)簧，彈(dan)簧各連接電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)的(de)(de)一(yi)(yi)(yi)個(ge)接線柱，在(zai)(zai)彈(dan)簧與(yu)線圈(quan)間由(you)(you)一(yi)(yi)(yi)個(ge)轉軸連接，在(zai)(zai)轉軸相(xiang)對于電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)的(de)(de)前端(duan)，江蘇正(zheng)泰(tai)(tai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)，有一(yi)(yi)(yi)個(ge)指(zhi)(zhi)(zhi)(zhi)針(zhen)。指(zhi)(zhi)(zhi)(zhi)針(zhen)偏轉。由(you)(you)于磁(ci)(ci)場力(li)的(de)(de)大(da)(da)(da)(da)小隨電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)增大(da)(da)(da)(da)而增大(da)(da)(da)(da)，所以(yi)就可以(yi)通過指(zhi)(zhi)(zhi)(zhi)針(zhen)的(de)(de)偏轉程度來觀察電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)大(da)(da)(da)(da)小。一(yi)(yi)(yi)般可直接測量微安或毫安數(shu)量級的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，正(zheng)泰(tai)(tai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)價格，為(wei)測更大(da)(da)(da)(da)的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)應有并聯電(dian)(dian)(dian)(dian)(dian)阻器（又稱分流(liu)(liu)器）。主要采用(yong)磁(ci)(ci)電(dian)(dian)(dian)(dian)(dian)系(xi)電(dian)(dian)(dian)(dian)(dian)表(biao)(biao)(biao)的(de)(de)測量機構。分流(liu)(liu)器的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻值(zhi)要使滿量程電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)通過時，正(zheng)泰(tai)(tai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)廠家(jia)，電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)滿偏轉，即電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)(biao)指(zhi)(zhi)(zhi)(zhi)示達到醉大(da)(da)(da)(da)。

明(ming)泰電(dian)氣（蘇州）有限公司是(shi)正(zheng)泰集團在蘇州地區一家授權的經銷企(qi)業(ye)，連續十年銷量居正(zheng)泰營(ying)銷網絡名，公司主要經營(ying)“正(zheng)泰”牌配電(dian)電(dian)器(qi)、控制電(dian)器(qi)、終端電(dian)器(qi)、電(dian)源電(dian)器(qi)、電(dian)力(li)電(dian)子(zi)、儀(yi)器(qi)儀(yi)表(biao)、建筑電(dian)器(qi)、高壓(ya)電(dian)器(qi)及成(cheng)套設備。

用(yong)整流(liu)(liu)式電(dian)(dian)(dian)表(biao)測交(jiao)流(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)時，僅當(dang)交(jiao)流(liu)(liu)為正弦波形時，電(dian)(dian)(dian)流(liu)(liu)表(biao)讀數(shu)才(cai)正確。為擴大(da)量程也(ye)可(ke)利用(yong)分(fen)流(liu)(liu)器。此外，也(ye)可(ke)用(yong)熱電(dian)(dian)(dian)式電(dian)(dian)(dian)表(biao)測量機構測量高頻(pin)電(dian)(dian)(dian)流(liu)(liu)。在電(dian)(dian)(dian)力系統中使用(yong)的(de)大(da)量程交(jiao)流(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)表(biao)多(duo)是用(yong)5A或1A的(de)電(dian)(dian)(dian)磁系電(dian)(dian)(dian)流(liu)(liu)表(biao)，并配以適當(dang)電(dian)(dian)(dian)流(liu)(liu)變比的(de)電(dian)(dian)(dian)流(liu)(liu)互感器。