接地(di)(di)(di)電(dian)(dian)(dian)(dian)阻測(ce)量(liang)(liang)儀由自備(bei)110～115Hz的交流電(dian)(dian)(dian)(dian)源(yuan)(手搖發電(dian)(dian)(dian)(dian)機或(huo)(huo)電(dian)(dian)(dian)(dian)子(zi)電(dian)(dian)(dian)(dian)源(yuan))和電(dian)(dian)(dian)(dian)位(wei)差計式測(ce)量(liang)(liang)機構組成(cheng)。接地(di)(di)(di)電(dian)(dian)(dian)(dian)阻測(ce)量(liang)(liang)儀的主要附件(jian)是三條測(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)線(xian)和兩支(zhi)測(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)極(ji)。接地(di)(di)(di)電(dian)(dian)(dian)(dian)阻測(ce)量(liang)(liang)儀有(you)C2、P2、P1、C1四個接線(xian)端(duan)子(zi)或(huo)(huo)E、P、C三個接線(xian)端(duan)子(zi)。測(ce)量(liang)(liang)時，在離被測(ce)接地(di)(di)(di)體(ti)一定的距(ju)離向地(di)(di)(di)下(xia)打(da)入電(dian)(dian)(dian)(dian)流極(ji)和電(dian)(dian)(dian)(dian)壓(ya)極(ji);將C2、P2端(duan)并接后(或(huo)(huo)將E端(duan))接于被測(ce)接地(di)(di)(di)體(ti)、將P1端(duan)(或(huo)(huo)P端(duan))接于電(dian)(dian)(dian)(dian)壓(ya)極(ji)、將C1端(duan)(或(huo)(huo)C端(duan))接于電(dian)(dian)(dian)(dian)流極(ji)。
(1)對于與配(pei)電(dian)網有導電(dian)性連接(jie)的接(jie)地裝置，測(ce)(ce)量前(qian)與配(pei)電(dian)網斷開，以保證測(ce)(ce)量的準確性，并防止測(ce)(ce)量電(dian)源(yuan)反饋到配(pei)電(dian)網上造成其他危險。
(2)測量連線應避免與(yu)鄰(lin)近的(de)架空線平(ping)行，防止感應電壓的(de)危(wei)險。
(3)測(ce)量距(ju)(ju)離應選擇適當，以提高測(ce)量的(de)準(zhun)確(que)性。如測(ce)量電(dian)(dian)極(ji)直線排(pai)列，對(dui)于單一垂直接(jie)(jie)(jie)地(di)(di)(di)體(ti)或占地(di)(di)(di)面積較小的(de)組合接(jie)(jie)(jie)地(di)(di)(di)體(ti)，電(dian)(dian)流極(ji)與(yu)(yu)被(bei)測(ce)接(jie)(jie)(jie)地(di)(di)(di)體(ti)之間的(de)距(ju)(ju)離可(ke)取40m，電(dian)(dian)壓(ya)極(ji)與(yu)(yu)被(bei)測(ce)接(jie)(jie)(jie)地(di)(di)(di)體(ti)之間的(de)距(ju)(ju)離可(ke)取20m;對(dui)于占地(di)(di)(di)面積較大(da)的(de)網絡(luo)接(jie)(jie)(jie)地(di)(di)(di)體(ti)，電(dian)(dian)流極(ji)與(yu)(yu)被(bei)測(ce)接(jie)(jie)(jie)地(di)(di)(di)體(ti)之間的(de)距(ju)(ju)離可(ke)取為(wei)接(jie)(jie)(jie)地(di)(di)(di)網對(dui)角線的(de)2～3倍，電(dian)(dian)壓(ya)極(ji)與(yu)(yu)被(bei)測(ce)接(jie)(jie)(jie)地(di)(di)(di)體(ti)之間的(de)距(ju)(ju)離可(ke)取為(wei)電(dian)(dian)流極(ji)與(yu)(yu)被(bei)測(ce)接(jie)(jie)(jie)地(di)(di)(di)體(ti)之間距(ju)(ju)離的(de)60%左右。
(4)測量(liang)電極的排列應避(bi)免與地下金屬管道平行，以保證測量(liang)結果的真實性。
(5)如被測(ce)接(jie)地(di)電阻很(hen)小，且測(ce)量(liang)連接(jie)線(xian)較長，應(ying)將C1與P2分(fen)開，分(fen)別引出連線(xian)接(jie)向被測(ce)接(jie)地(di)體(ti)，以減小測(ce)量(liang)誤差(cha)。
(6)雨天(tian)一(yi)般(ban)不應測(ce)量(liang)接(jie)地(di)電(dian)阻(zu);雷(lei)雨天(tian)不得測(ce)量(liang)防雷(lei)裝(zhuang)置的接(jie)地(di)電(dian)阻(zu)。
(7)接好線后(hou)，水(shui)平放置儀表(biao)，并選擇適當的(de)倍率，以(yi)120r/min左右的(de)轉速不停(ting)地搖動搖把(ba)或接通電源，同(tong)時調節電位(wei)器旋鈕(niu)，至儀表(biao)指(zhi)針穩定地指(zhi)在中心位(wei)置時，即可從刻度盤讀數(shu)，將讀數(shu)乘以(yi)倍率即得被(bei)測接地電阻值。
