常見萬用表(biao)的使用和(he)保養

萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)的(de)(de)(de)(de)結構形式有(you)很多，面板上(shang)(shang)的(de)(de)(de)(de)旋(xuan)(xuan)鈕、開關的(de)(de)(de)(de)布局各異，因此在(zai)使(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)之(zhi)前，應(ying)仔細了解和(he)熟悉(xi)各部(bu)件的(de)(de)(de)(de)作用(yong)(yong)(yong)(yong)(yong)，同時(shi)也要(yao)分清盤上(shang)(shang)各條標(biao)(biao)度尺所(suo)(suo)對(dui)應(ying)的(de)(de)(de)(de)測(ce)(ce)t的(de)(de)(de)(de)t。要(yao)特別注意萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)的(de)(de)(de)(de)正(zheng)(zheng)(zheng)確使(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)，因為萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)的(de)(de)(de)(de)故障絕大部(bu)分是由于操(cao)作使(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)不當而引起的(de)(de)(de)(de).所(suo)(suo)以正(zheng)(zheng)(zheng)確使(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)，實際上(shang)(shang)就是對(dui)萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)最(zui)好的(de)(de)(de)(de)維護。另外(wai)，也只有(you)正(zheng)(zheng)(zheng)確使(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao).才(cai)能使(shi)(shi)(shi)(shi)測(ce)(ce)t誤差減(jian)小到(dao)最(zui)低程度。萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)在(zai)使(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)之(zhi)前應(ying)水平(ping)放置(zhi)，并檢查指(zhi)(zhi)針(zhen)是否(fou)在(zai)零位(wei)，若不在(zai)零位(wei)，則(ze)應(ying)調整萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)中間(jian)的(de)(de)(de)(de)機械零位(wei)調節螺釘(ding)，使(shi)(shi)(shi)(shi)表(biao)(biao)(biao)針(zhen)指(zhi)(zhi)向零位(wei)。要(yao)將(jiang)紅色測(ce)(ce)試棒(bang)的(de)(de)(de)(de)連接線(xian)接到(dao)紅色接線(xian)柱或標(biao)(biao)有(you)“+”號(hao)的(de)(de)(de)(de)插孔內，黑(hei)色測(ce)(ce)試棒(bang)的(de)(de)(de)(de)連接線(xian)接到(dao)黑(hei)色接線(xian)柱或標(biao)(biao)有(you)“一(yi)’號(hao)的(de)(de)(de)(de)插孔內。要(yao)根(gen)據測(ce)(ce)t的(de)(de)(de)(de)對(dui)象將(jiang)轉換開關旋(xuan)(xuan)到(dao)孺(ru)要(yao)的(de)(de)(de)(de)位(wei)置(zhi)。例如，測(ce)(ce)t交流電壓時(shi)，應(ying)將(jiang)轉換開關旋(xuan)(xuan)到(dao)相(xiang)應(ying)區(qu)間(jian)上(shang)(shang)。有(you)的(de)(de)(de)(de)萬(wan)用(yong)(yong)(yong)(yong)(yong)表(biao)(biao)(biao)盤上(shang)(shang)種類(lei)(lei)(lei)選(xuan)擇旋(xuan)(xuan)鈕和(he)t限(xian)(xian)變換旋(xuan)(xuan)鈕分設(she)。使(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)時(shi)。應(ying)先將(jiang)種類(lei)(lei)(lei)選(xuan)擇旋(xuan)(xuan)鈕旋(xuan)(xuan)到(dao)對(dui)應(ying)被測(ce)(ce)，所(suo)(suo)需的(de)(de)(de)(de)檔位(wei)，然后再將(jiang)t限(xian)(xian)變換旋(xuan)(xuan)鈕旋(xuan)(xuan)到(dao)相(xiang)應(ying)檔位(wei)，適當的(de)(de)(de)(de)t限(xian)(xian)。要(yao)特別注意種類(lei)(lei)(lei)的(de)(de)(de)(de)選(xuan)擇，否(fou)則(ze)可能引起嚴重(zhong)后果(guo)。

注意事項

（1）禁止在雷電時或高壓(ya)設備附近測絕緣電阻，只(zhi)能(neng)在設備不帶電，也沒有感應電的情況下測量(liang)。

（2）搖測過(guo)程中，被測設備上不能有(you)人工(gong)作。

（3）搖表線不能絞在一起，要分開。

（4）搖(yao)表未(wei)停止轉(zhuan)動之前(qian)或被測設備未(wei)放電之前(qian)，嚴禁用手觸及(ji)。拆線時，也不要觸及(ji)引(yin)線的(de)金屬(shu)部分。

（5）測(ce)量結束時，對于大電(dian)容設(she)備要放電(dian)。

（6）要定期校驗其準(zhun)確度。