一般(ban)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)位差(cha)計(ji)(ji)(ji)的(de)(de)工作(zuo)原理(li)決定(ding)其在輸(shu)(shu)出標準(zhun)(zhun)電(dian)(dian)(dian)(dian)(dian)動(dong)勢時存(cun)在較大輸(shu)(shu)出電(dian)(dian)(dian)(dian)(dian)阻(zu)，因此不(bu)能(neng)(neng)(neng)直(zhi)接(jie)校(xiao)(xiao)驗(yan)各(ge)種低輸(shu)(shu)入阻(zu)抗儀表。如動(dong)圈(quan)式溫(wen)度計(ji)(ji)(ji)，ＤＤＺⅡ、ＤＤＺⅢ型(xing)(xing)電(dian)(dian)(dian)(dian)(dian)動(dong)單元組(zu)合儀表和各(ge)種磁電(dian)(dian)(dian)(dian)(dian)式電(dian)(dian)(dian)(dian)(dian)壓(ya)、電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表。 UJ60型(xing)(xing)多(duo)(duo)功能(neng)(neng)(neng)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)位差(cha)計(ji)(ji)(ji)是在傳統直(zhi)漢電(dian)(dian)(dian)(dian)(dian)位差(cha)計(ji)(ji)(ji)基礎上(shang)，結合電(dian)(dian)(dian)(dian)(dian)子技術設計(ji)(ji)(ji)而(er)成。集測(ce)量和輸(shu)(shu)出標準(zhun)(zhun)電(dian)(dian)(dian)(dian)(dian)壓(ya)和電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)諸功能(neng)(neng)(neng)于一體的(de)(de)新型(xing)(xing)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)伴(ban)差(cha)計(ji)(ji)(ji)。UJ60型(xing)(xing)多(duo)(duo)功能(neng)(neng)(neng)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)位差(cha)計(ji)(ji)(ji)不(bu)僅(jin)具有精(jing)密測(ce)量電(dian)(dian)(dian)(dian)(dian)壓(ya)、間(jian)接(jie)測(ce)量電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)、溫(wen)度的(de)(de)功能(neng)(neng)(neng)，而(er)且(qie)可輸(shu)(shu)出標準(zhun)(zhun)電(dian)(dian)(dian)(dian)(dian)壓(ya)和電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，直(zhi)接(jie)校(xiao)(xiao)驗(yan)上(shang)述各(ge)種儀表。 UJ60型(xing)(xing)多(duo)(duo)功能(neng)(neng)(neng)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)位差(cha)計(ji)(ji)(ji)設計(ji)(ji)(ji)結構輕巧(qiao)、內附檢(jian)流(liu)(liu)計(ji)(ji)(ji)、標準(zhun)(zhun)電(dian)(dian)(dian)(dian)(dian)池和工作(zuo)電(dian)(dian)(dian)(dian)(dian)池盒，便于攜帶，適(shi)用于現場和實驗(yan)室使用。 

UJ60型直流高電位差計技術參數：

量限：0～1.05550V
準確度：0.05級
標準源：電壓（zui大）10V（負載電流10mA）
電流（zui大）20mA（負載電壓20V）

UJ60型直流高電位差(cha)計工作原理：
本電位差計是采用補償法原理，使被測量電動勢與恒定的標準電動勢相互比較，是一種高精度測量電動勢的方法。
（1）不需測量出線路中電流大小，只要測量RK=與RNR的比值即可。
（2）當*補償時，測量回路與被測量回路之間無電流流過，測量線路不消耗被測量線路的能量。
（3）測量的準確性是依賴標準電池電動勢EN及被測電動勢之補償電阻RK與標準電池電動勢勸勢補償電阻RN之比值的準確性和工作電流

線路和結構：
UJ24型直流電位差計工作電流為0.1毫安，每伏為10000歐姆。
電位差計有六個測量十進盤，其測量電動勢范圍如下：
*個測量十進盤            0.1伏×20   由15只1000歐姆組成
第二個測量十進盤           0.01伏×10   由10只100歐姆組成
第三個測量十進盤          0.001伏×10   由20只10歐姆組成
第四個測量十進盤         0.0001伏×10   由20只1歐姆組成
第五個測量十進盤        0.00001伏×10   由20只0.1歐姆組成
工作電流由3個盤，其可調范圍如下：
17×240+17×14.5+(0~20)Ω
“未知1"“未知2"“電計"各有二個接線端鈕組成，供連接被測電勢和外接指零儀用，除“電計"接線端鈕外，其余都標有“＋－"極性符號，以免接線時極性接錯。
“標準"“未知"“斷"開關，可供選擇接入標準電池、被測電動勢和測量線路斷開用； “粗"“中"“細"“短路"“輸出"開關可選擇讓“指零儀"保護接通、直通或短路，也可選擇讓“未知"端子輸出與測量盤示值相等的電勢。
電位差計的結構：所有十進盤均采用高絕緣材制成，電刷及觸頭采用得銀材料。