WEIGEL電流表EQ72K 50/100/5A翊霈優質供應

WEIGEL電流表EQ72K 50/100/5A翊霈優質供應

萬用(yong)表(biao)(biao)又稱為復用(yong)表(biao)(biao)、多用(yong)表(biao)(biao)、三用(yong)表(biao)(biao)、繁用(yong)表(biao)(biao)等，是(shi)電(dian)(dian)力電(dian)(dian)子等部門*的(de)測(ce)量(liang)(liang)儀(yi)表(biao)(biao)，一般以測(ce)量(liang)(liang)電(dian)(dian)壓、電(dian)(dian)流和(he)(he)電(dian)(dian)阻為主要目(mu)的(de)。萬用(yong)表(biao)(biao)按顯示方式分為指針萬用(yong)表(biao)(biao)和(he)(he)數字萬用(yong)表(biao)(biao)。是(shi)一種多功(gong)能、多量(liang)(liang)程的(de)測(ce)量(liang)(liang)儀(yi)表(biao)(biao)，一般萬用(yong)表(biao)(biao)可測(ce)量(liang)(liang)直(zhi)流電(dian)(dian)流、直(zhi)流電(dian)(dian)壓、交流電(dian)(dian)流、交流電(dian)(dian)壓、電(dian)(dian)阻和(he)(he)音頻(pin)電(dian)(dian)平等，有的(de)還可以測(ce)交流電(dian)(dian)流、電(dian)(dian)容量(liang)(liang)、電(dian)(dian)感量(liang)(liang)及半導體的(de)一些參數（如β）等。
磁(ci)(ci)(ci)(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)(xi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)工儀(yi)(yi)(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)量(liang)(liang)(liang)機構是(shi)由(you)(you)固定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)路(lu)(lu)系(xi)(xi)統(tong)和可(ke)(ke)(ke)動(dong)部(bu)(bu)分(fen)(fen)(fen)組成(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)。儀(yi)(yi)(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)路(lu)(lu)系(xi)(xi)統(tong)包括永磁(ci)(ci)(ci)(ci)鐵1，固定(ding)在(zai)磁(ci)(ci)(ci)(ci)鐵兩極(ji)的(de)(de)(de)(de)(de)(de)(de)(de)極(ji)掌2以(yi)(yi)及處(chu)于兩個極(ji)掌之間的(de)(de)(de)(de)(de)(de)(de)(de)圓柱形(xing)鐵芯3。圓柱形(xing)鐵芯固定(ding)在(zai)儀(yi)(yi)(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)支(zhi)架上，用(yong)(yong)來減(jian)小(xiao)磁(ci)(ci)(ci)(ci)阻，并(bing)使極(ji)掌和鐵芯間的(de)(de)(de)(de)(de)(de)(de)(de)空氣隙中產生(sheng)均勻的(de)(de)(de)(de)(de)(de)(de)(de)輻射形(xing)磁(ci)(ci)(ci)(ci)場(chang)。處(chu)在(zai)這個磁(ci)(ci)(ci)(ci)場(chang)中的(de)(de)(de)(de)(de)(de)(de)(de)可(ke)(ke)(ke)動(dong)線圈4繞轉(zhuan)軸偏(pian)轉(zhuan)時(shi)(shi)，兩個有(you)(you)效邊(bian)上的(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)場(chang)也總是(shi)大小(xiao)相(xiang)(xiang)等，并(bing)且方向(xiang)是(shi)與線圈邊(bian)相(xiang)(xiang)互垂(chui)直(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)。可(ke)(ke)(ke)動(dong)線圈繞在(zai)鋁(lv)框上。轉(zhuan)軸分(fen)(fen)(fen)成(cheng)前(qian)后兩部(bu)(bu)分(fen)(fen)(fen)，每個半軸的(de)(de)(de)(de)(de)(de)(de)(de)一(yi)(yi)端固定(ding)在(zai)動(dong)圈鋁(lv)框上，另一(yi)(yi)端則(ze)通(tong)過軸尖支(zhi)撐于軸承中。在(zai)前(qian)半軸還裝有(you)(you)指(zhi)(zhi)(zhi)針，當(dang)可(ke)(ke)(ke)動(dong)部(bu)(bu)分(fen)(fen)(fen)偏(pian)轉(zhuan)時(shi)(shi)，用(yong)(yong)來指(zhi)(zhi)(zhi)示(shi)被測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)(de)大小(xiao)。萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)是(shi)一(yi)(yi)種(zhong)(zhong)帶(dai)有(you)(you)整流(liu)(liu)(liu)(liu)(liu)(liu)器的(de)(de)(de)(de)(de)(de)(de)(de)、可(ke)(ke)(ke)以(yi)(yi)測(ce)(ce)量(liang)(liang)(liang)交(jiao)(jiao)(jiao)(jiao)、直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓及電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻等多(duo)(duo)種(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)學參量(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)式(shi)(shi)儀(yi)(yi)(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)。對于每一(yi)(yi)種(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)學量(liang)(liang)(liang),一(yi)(yi)般都有(you)(you)幾個量(liang)(liang)(liang)程。又(you)稱(cheng)多(duo)(duo)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)或簡稱(cheng)多(duo)(duo)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)。萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)是(shi)由(you)(you)磁(ci)(ci)(ci)(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)(xi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)(表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭),測(ce)(ce)量(liang)(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)和選擇開關等組成(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)。通(tong)過選擇開關的(de)(de)(de)(de)(de)(de)(de)(de)變換,可(ke)(ke)(ke)方便(bian)地對多(duo)(duo)種(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)學參量(liang)(liang)(liang)進行測(ce)(ce)量(liang)(liang)(liang)。其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)計算的(de)(de)(de)(de)(de)(de)(de)(de)主要(yao)(yao)依據是(shi)閉合電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)歐(ou)姆定(ding)律(lv)。萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)種(zhong)(zhong)類很多(duo)(duo),使用(yong)(yong)時(shi)(shi)應根據不同的(de)(de)(de)(de)(de)(de)(de)(de)要(yao)(yao)求進行選擇。萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)由(you)(you)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭、測(ce)(ce)量(liang)(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)及轉(zhuan)換開關等三(san)(san)個主要(yao)(yao)部(bu)(bu)分(fen)(fen)(fen)組成(cheng)。是(shi)一(yi)(yi)只高(gao)靈敏度(du)(du)的(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)式(shi)(shi)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)，萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)(de)(de)(de)主要(yao)(yao)性(xing)能(neng)(neng)指(zhi)(zhi)(zhi)標基本上取決于表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭的(de)(de)(de)(de)(de)(de)(de)(de)性(xing)能(neng)(neng)。表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭的(de)(de)(de)(de)(de)(de)(de)(de)靈敏度(du)(du)是(shi)指(zhi)(zhi)(zhi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭指(zhi)(zhi)(zhi)針滿刻(ke)度(du)(du)偏(pian)轉(zhuan)時(shi)(shi)流(liu)(liu)(liu)(liu)(liu)(liu)過表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭的(de)(de)(de)(de)(de)(de)(de)(de)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)值(zhi)(zhi)(zhi)(zhi)，這個值(zhi)(zhi)(zhi)(zhi)越小(xiao)，表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭的(de)(de)(de)(de)(de)(de)(de)(de)靈敏度(du)(du)愈高(gao)。測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓時(shi)(shi)的(de)(de)(de)(de)(de)(de)(de)(de)內阻越大，其(qi)性(xing)能(neng)(neng)就(jiu)越好。表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭上有(you)(you)四條(tiao)(tiao)刻(ke)度(du)(du)線，它們的(de)(de)(de)(de)(de)(de)(de)(de)功能(neng)(neng)如(ru)下：第一(yi)(yi)條(tiao)(tiao)（從上到下）標有(you)(you)R或Ω，指(zhi)(zhi)(zhi)示(shi)的(de)(de)(de)(de)(de)(de)(de)(de)是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻值(zhi)(zhi)(zhi)(zhi)，轉(zhuan)換開關在(zai)歐(ou)姆擋時(shi)(shi)，即讀(du)(du)此(ci)條(tiao)(tiao)刻(ke)度(du)(du)線。第二條(tiao)(tiao)標有(you)(you)∽和VA,指(zhi)(zhi)(zhi)示(shi)的(de)(de)(de)(de)(de)(de)(de)(de)是(shi)交(jiao)(jiao)(jiao)(jiao)、直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓和直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)值(zhi)(zhi)(zhi)(zhi)，當(dang)轉(zhuan)換開關在(zai)交(jiao)(jiao)(jiao)(jiao)、直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓或直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)擋，量(liang)(liang)(liang)程在(zai)除交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)10V以(yi)(yi)外(wai)的(de)(de)(de)(de)(de)(de)(de)(de)其(qi)它位置(zhi)時(shi)(shi)，即讀(du)(du)此(ci)條(tiao)(tiao)刻(ke)度(du)(du)線。第三(san)(san)條(tiao)(tiao)標有(you)(you)10V,指(zhi)(zhi)(zhi)示(shi)的(de)(de)(de)(de)(de)(de)(de)(de)是(shi)10V的(de)(de)(de)(de)(de)(de)(de)(de)交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓值(zhi)(zhi)(zhi)(zhi)，當(dang)轉(zhuan)換開關在(zai)交(jiao)(jiao)(jiao)(jiao)、直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓擋，量(liang)(liang)(liang)程在(zai)交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)10V時(shi)(shi)，即讀(du)(du)此(ci)條(tiao)(tiao)刻(ke)度(du)(du)線。第四條(tiao)(tiao)標有(you)(you)dB,指(zhi)(zhi)(zhi)示(shi)的(de)(de)(de)(de)(de)(de)(de)(de)是(shi)音頻(pin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平。?萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)測(ce)(ce)試領域基本的(de)(de)(de)(de)(de)(de)(de)(de)工具，也是(shi)一(yi)(yi)種(zhong)(zhong)使用(yong)(yong)廣泛的(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)試儀(yi)(yi)(yi)器。萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)又(you)叫多(duo)(duo)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)、三(san)(san)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)(A,V,Ω也即電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻三(san)(san)用(yong)(yong)）、復用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)、萬(wan)(wan)(wan)能(neng)(neng)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)，萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)分(fen)(fen)(fen)為指(zhi)(zhi)(zhi)針式(shi)(shi)萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)和數(shu)字(zi)(zi)萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)，還有(you)(you)一(yi)(yi)種(zhong)(zhong)帶(dai)示(shi)波器功能(neng)(neng)的(de)(de)(de)(de)(de)(de)(de)(de)示(shi)波萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)，是(shi)一(yi)(yi)種(zhong)(zhong)多(duo)(duo)功能(neng)(neng)、多(duo)(duo)量(liang)(liang)(liang)程的(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)量(liang)(liang)(liang)儀(yi)(yi)(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)。一(yi)(yi)般萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)可(ke)(ke)(ke)測(ce)(ce)量(liang)(liang)(liang)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)、直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓、交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻和音頻(pin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平等，有(you)(you)的(de)(de)(de)(de)(de)(de)(de)(de)還可(ke)(ke)(ke)以(yi)(yi)測(ce)(ce)交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容量(liang)(liang)(liang)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感量(liang)(liang)(liang)、溫(wen)度(du)(du)及半導體(ti)（二極(ji)管、三(san)(san)極(ji)管）的(de)(de)(de)(de)(de)(de)(de)(de)一(yi)(yi)些(xie)參數(shu)。數(shu)字(zi)(zi)式(shi)(shi)萬(wan)(wan)(wan)用(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)已成(cheng)為主流(liu)(liu)(liu)(liu)(liu)(liu)，已經取代模(mo)擬式(shi)(shi)儀(yi)(yi)(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)。與模(mo)擬式(shi)(shi)儀(yi)(yi)(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)相(xiang)(xiang)比，數(shu)字(zi)(zi)式(shi)(shi)儀(yi)(yi)(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(biao)靈敏度(du)(du)高(gao)，精(jing)確度(du)(du)高(gao)，顯示(shi)清(qing)晰，過載能(neng)(neng)力強，便(bian)于攜帶(dai)，使用(yong)(yong)也更方便(bian)簡單。?
1、精確度
儀(yi)表(biao)精確度(du)(du)科稱(cheng)(cheng)精度(du)(du)，又稱(cheng)(cheng)準確度(du)(du)。精確度(du)(du)和誤(wu)差可以說是孿生兄弟，因為有誤(wu)差的(de)存在，才有精確度(du)(du)這個概念(nian)。儀(yi)表(biao)精確度(du)(du)簡言之就是儀(yi)表(biao)測(ce)量值接近真值的(de)準確程(cheng)度(du)(du)，通常用(yong)相對百分誤(wu)差（也稱(cheng)(cheng)相對折合誤(wu)差）表(biao)示。
2、變差
變差是指儀(yi)表(biao)(biao)被(bei)測變量（可(ke)理解為(wei)輸入信號）多次從不同(tong)方向(xiang)達(da)到(dao)(dao)同(tong)一數(shu)值時，儀(yi)表(biao)(biao)指示值之(zhi)(zhi)間(jian)的大差值，或者說是儀(yi)表(biao)(biao)在(zai)外界條件(jian)不變的情(qing)況下(xia)，被(bei)測參數(shu)由小到(dao)(dao)大變化（正向(xiang)特(te)(te)性）和被(bei)測參數(shu)由大到(dao)(dao)小變化（反向(xiang)特(te)(te)性）不一致(zhi)的程(cheng)度，兩者之(zhi)(zhi)差即為(wei)儀(yi)表(biao)(biao)變差。
3、靈敏度
靈敏度(du)(du)是指儀表(biao)對被(bei)(bei)測參數(shu)變(bian)化的靈敏程度(du)(du)，或(huo)者說是對被(bei)(bei)測的量(liang)變(bian)化的反(fan)應(ying)能(neng)力(li)，是在穩(wen)(wen)態下，輸(shu)出(chu)變(bian)化增量(liang)對輸(shu)入變(bian)化增量(liang)的比(bi)值(zhi)：靈敏度(du)(du)有時(shi)也稱(cheng)“放(fang)大比(bi)”，也是儀表(biao)靜特性貼切線(xian)上各點的斜率。增加放(fang)大倍數(shu)可以提(ti)高儀表(biao)靈敏度(du)(du)，單純加大靈敏度(du)(du)并不改變(bian)儀表(biao)的基(ji)本性能(neng)，即(ji)儀表(biao)精(jing)度(du)(du)并沒有提(ti)高，相(xiang)反(fan)有時(shi)會出(chu)現(xian)振(zhen)蕩現(xian)象，造成(cheng)輸(shu)出(chu)不穩(wen)(wen)定。儀表(biao)靈敏度(du)(du)應(ying)保持適當(dang)的量(liang)。

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WEIGEL備(bei)件BIEQ 72K 15min 3000/1A
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WEIGEL電流(liu)表EQ96-X CT 300/5A scale 0—300A 2倍過載 無紅線(xian)
萬用(yong)(yong)(yong)表(biao)(biao)又稱為(wei)復用(yong)(yong)(yong)表(biao)(biao)、多用(yong)(yong)(yong)表(biao)(biao)、三(san)用(yong)(yong)(yong)表(biao)(biao)、繁用(yong)(yong)(yong)表(biao)(biao)等(deng)，是電(dian)(dian)力電(dian)(dian)子等(deng)部門*的(de)(de)測(ce)(ce)量(liang)(liang)儀表(biao)(biao)，一般(ban)以測(ce)(ce)量(liang)(liang)電(dian)(dian)壓、電(dian)(dian)流(liu)和(he)電(dian)(dian)阻(zu)為(wei)主要(yao)目的(de)(de)。萬用(yong)(yong)(yong)表(biao)(biao)按顯示方式分為(wei)指針萬用(yong)(yong)(yong)表(biao)(biao)和(he)數(shu)字(zi)萬用(yong)(yong)(yong)表(biao)(biao)。是一種多功能、多量(liang)(liang)程(cheng)的(de)(de)測(ce)(ce)量(liang)(liang)儀表(biao)(biao)，一般(ban)萬用(yong)(yong)(yong)表(biao)(biao)可測(ce)(ce)量(liang)(liang)直流(liu)電(dian)(dian)流(liu)、直流(liu)電(dian)(dian)壓、交(jiao)流(liu)電(dian)(dian)流(liu)、交(jiao)流(liu)電(dian)(dian)壓、電(dian)(dian)阻(zu)和(he)音頻電(dian)(dian)平等(deng)，有的(de)(de)還(huan)可以測(ce)(ce)交(jiao)流(liu)電(dian)(dian)流(liu)、電(dian)(dian)容量(liang)(liang)、電(dian)(dian)感量(liang)(liang)及半導(dao)體的(de)(de)一些參(can)數(shu)（如β）等(deng)。
磁(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)工儀(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)(ce)量(liang)(liang)機(ji)構(gou)是(shi)(shi)由固(gu)定(ding)(ding)(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)路(lu)系(xi)統(tong)和(he)(he)(he)可(ke)動(dong)部(bu)(bu)分組(zu)成(cheng)(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。儀(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)路(lu)系(xi)統(tong)包括(kuo)永磁(ci)鐵(tie)(tie)1，固(gu)定(ding)(ding)(ding)在(zai)磁(ci)鐵(tie)(tie)兩(liang)極(ji)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)極(ji)掌2以及處于兩(liang)個極(ji)掌之(zhi)間的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)圓柱(zhu)形(xing)鐵(tie)(tie)芯(xin)3。圓柱(zhu)形(xing)鐵(tie)(tie)芯(xin)固(gu)定(ding)(ding)(ding)在(zai)儀(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)支架上(shang)，用(yong)(yong)(yong)來(lai)減(jian)小(xiao)磁(ci)阻，并(bing)使(shi)極(ji)掌和(he)(he)(he)鐵(tie)(tie)芯(xin)間的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)空氣(qi)隙(xi)中產生均(jun)勻的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)輻射形(xing)磁(ci)場。處在(zai)這個磁(ci)場中的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)可(ke)動(dong)線圈(quan)(quan)4繞轉(zhuan)(zhuan)(zhuan)軸(zhou)(zhou)偏轉(zhuan)(zhuan)(zhuan)時(shi)(shi)，兩(liang)個有(you)(you)(you)(you)效邊(bian)上(shang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)場也總(zong)是(shi)(shi)大(da)小(xiao)相等(deng)(deng)，并(bing)且(qie)方向(xiang)是(shi)(shi)與線圈(quan)(quan)邊(bian)相互垂直(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。可(ke)動(dong)線圈(quan)(quan)繞在(zai)鋁框上(shang)。轉(zhuan)(zhuan)(zhuan)軸(zhou)(zhou)分成(cheng)(cheng)前后兩(liang)部(bu)(bu)分，每個半(ban)(ban)軸(zhou)(zhou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)一(yi)(yi)端固(gu)定(ding)(ding)(ding)在(zai)動(dong)圈(quan)(quan)鋁框上(shang)，另一(yi)(yi)端則通過(guo)(guo)軸(zhou)(zhou)尖支撐于軸(zhou)(zhou)承(cheng)中。在(zai)前半(ban)(ban)軸(zhou)(zhou)還裝有(you)(you)(you)(you)指(zhi)針(zhen)，當可(ke)動(dong)部(bu)(bu)分偏轉(zhuan)(zhuan)(zhuan)時(shi)(shi)，用(yong)(yong)(yong)來(lai)指(zhi)示(shi)(shi)(shi)(shi)被測(ce)(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)大(da)小(xiao)。萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)是(shi)(shi)一(yi)(yi)種(zhong)(zhong)帶有(you)(you)(you)(you)整(zheng)流(liu)(liu)(liu)(liu)(liu)器(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)、可(ke)以測(ce)(ce)(ce)量(liang)(liang)交(jiao)(jiao)、直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)及電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻等(deng)(deng)多(duo)(duo)種(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)學(xue)(xue)(xue)參(can)量(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)式(shi)(shi)儀(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)。對于每一(yi)(yi)種(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)學(xue)(xue)(xue)量(liang)(liang),一(yi)(yi)般都有(you)(you)(you)(you)幾個量(liang)(liang)程(cheng)。又稱多(duo)(duo)用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)或(huo)(huo)簡稱多(duo)(duo)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)。萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)是(shi)(shi)由磁(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(表(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)),測(ce)(ce)(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)和(he)(he)(he)選(xuan)擇開(kai)(kai)(kai)關(guan)等(deng)(deng)組(zu)成(cheng)(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。通過(guo)(guo)選(xuan)擇開(kai)(kai)(kai)關(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)變換(huan),可(ke)方便(bian)地對多(duo)(duo)種(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)學(xue)(xue)(xue)參(can)量(liang)(liang)進行測(ce)(ce)(ce)量(liang)(liang)。其電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)計算的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)主要(yao)依據(ju)是(shi)(shi)閉合(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)歐(ou)姆(mu)定(ding)(ding)(ding)律。萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)種(zhong)(zhong)類很多(duo)(duo),使(shi)用(yong)(yong)(yong)時(shi)(shi)應(ying)根據(ju)不同的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)要(yao)求進行選(xuan)擇。萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)由表(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)、測(ce)(ce)(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)及轉(zhuan)(zhuan)(zhuan)換(huan)開(kai)(kai)(kai)關(guan)等(deng)(deng)三個主要(yao)部(bu)(bu)分組(zu)成(cheng)(cheng)。是(shi)(shi)一(yi)(yi)只高(gao)(gao)(gao)靈(ling)敏度(du)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)磁(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)式(shi)(shi)直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)，萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)主要(yao)性能(neng)(neng)(neng)指(zhi)標(biao)(biao)基本(ben)上(shang)取決(jue)于表(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)性能(neng)(neng)(neng)。表(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)靈(ling)敏度(du)是(shi)(shi)指(zhi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)指(zhi)針(zhen)滿刻(ke)(ke)(ke)度(du)偏轉(zhuan)(zhuan)(zhuan)時(shi)(shi)流(liu)(liu)(liu)(liu)(liu)過(guo)(guo)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)值(zhi)，這個值(zhi)越(yue)(yue)小(xiao)，表(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)靈(ling)敏度(du)愈高(gao)(gao)(gao)。測(ce)(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)時(shi)(shi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)內阻越(yue)(yue)大(da)，其性能(neng)(neng)(neng)就(jiu)越(yue)(yue)好。表(biao)(biao)(biao)(biao)(biao)(biao)(biao)頭(tou)(tou)上(shang)有(you)(you)(you)(you)四條(tiao)(tiao)刻(ke)(ke)(ke)度(du)線，它們的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)功(gong)能(neng)(neng)(neng)如下：第一(yi)(yi)條(tiao)(tiao)（從上(shang)到下）標(biao)(biao)有(you)(you)(you)(you)R或(huo)(huo)Ω，指(zhi)示(shi)(shi)(shi)(shi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻值(zhi)，轉(zhuan)(zhuan)(zhuan)換(huan)開(kai)(kai)(kai)關(guan)在(zai)歐(ou)姆(mu)擋時(shi)(shi)，即讀此(ci)(ci)條(tiao)(tiao)刻(ke)(ke)(ke)度(du)線。第二條(tiao)(tiao)標(biao)(biao)有(you)(you)(you)(you)∽和(he)(he)(he)VA,指(zhi)示(shi)(shi)(shi)(shi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)交(jiao)(jiao)、直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)和(he)(he)(he)直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)值(zhi)，當轉(zhuan)(zhuan)(zhuan)換(huan)開(kai)(kai)(kai)關(guan)在(zai)交(jiao)(jiao)、直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)或(huo)(huo)直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)擋，量(liang)(liang)程(cheng)在(zai)除交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)10V以外的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)其它位置時(shi)(shi)，即讀此(ci)(ci)條(tiao)(tiao)刻(ke)(ke)(ke)度(du)線。第三條(tiao)(tiao)標(biao)(biao)有(you)(you)(you)(you)10V,指(zhi)示(shi)(shi)(shi)(shi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)10V的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)，當轉(zhuan)(zhuan)(zhuan)換(huan)開(kai)(kai)(kai)關(guan)在(zai)交(jiao)(jiao)、直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)擋，量(liang)(liang)程(cheng)在(zai)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)10V時(shi)(shi)，即讀此(ci)(ci)條(tiao)(tiao)刻(ke)(ke)(ke)度(du)線。第四條(tiao)(tiao)標(biao)(biao)有(you)(you)(you)(you)dB,指(zhi)示(shi)(shi)(shi)(shi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)音頻電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平。?萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)是(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子測(ce)(ce)(ce)試領域基本(ben)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)工具，也是(shi)(shi)一(yi)(yi)種(zhong)(zhong)使(shi)用(yong)(yong)(yong)廣泛的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)(ce)試儀(yi)器(qi)。萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)又叫多(duo)(duo)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)、三用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)(A,V,Ω也即電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻三用(yong)(yong)(yong)）、復用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)、萬(wan)(wan)能(neng)(neng)(neng)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)，萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)分為指(zhi)針(zhen)式(shi)(shi)萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)和(he)(he)(he)數(shu)字萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)，還有(you)(you)(you)(you)一(yi)(yi)種(zhong)(zhong)帶示(shi)(shi)(shi)(shi)波器(qi)功(gong)能(neng)(neng)(neng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)示(shi)(shi)(shi)(shi)波萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)，是(shi)(shi)一(yi)(yi)種(zhong)(zhong)多(duo)(duo)功(gong)能(neng)(neng)(neng)、多(duo)(duo)量(liang)(liang)程(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)(ce)量(liang)(liang)儀(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)。一(yi)(yi)般萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)可(ke)測(ce)(ce)(ce)量(liang)(liang)直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)、直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)、交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻和(he)(he)(he)音頻電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平等(deng)(deng)，有(you)(you)(you)(you)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)還可(ke)以測(ce)(ce)(ce)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容量(liang)(liang)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感量(liang)(liang)、溫度(du)及半(ban)(ban)導(dao)體(ti)（二極(ji)管、三極(ji)管）的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)一(yi)(yi)些參(can)數(shu)。數(shu)字式(shi)(shi)萬(wan)(wan)用(yong)(yong)(yong)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)已成(cheng)(cheng)為主流(liu)(liu)(liu)(liu)(liu)，已經取代模(mo)擬式(shi)(shi)儀(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)。與模(mo)擬式(shi)(shi)儀(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)相比，數(shu)字式(shi)(shi)儀(yi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)靈(ling)敏度(du)高(gao)(gao)(gao)，精確度(du)高(gao)(gao)(gao)，顯示(shi)(shi)(shi)(shi)清晰，過(guo)(guo)載能(neng)(neng)(neng)力強，便(bian)于攜帶，使(shi)用(yong)(yong)(yong)也更方便(bian)簡單。?
1、精確度
儀表精(jing)(jing)確(que)(que)度(du)(du)(du)科稱精(jing)(jing)度(du)(du)(du)，又稱準確(que)(que)度(du)(du)(du)。精(jing)(jing)確(que)(que)度(du)(du)(du)和誤差可以(yi)說是(shi)孿生兄弟，因(yin)為有誤差的存(cun)在，才(cai)有精(jing)(jing)確(que)(que)度(du)(du)(du)這(zhe)個概念。儀表精(jing)(jing)確(que)(que)度(du)(du)(du)簡言之就(jiu)是(shi)儀表測(ce)量值(zhi)接近真(zhen)值(zhi)的準確(que)(que)程度(du)(du)(du)，通(tong)常用(yong)相對百分(fen)誤差（也稱相對折(zhe)合誤差）表示。
2、變差
變(bian)(bian)差是(shi)指(zhi)儀表(biao)被(bei)測(ce)變(bian)(bian)量（可理解為輸入信號）多(duo)次從不同(tong)(tong)方向達到(dao)同(tong)(tong)一(yi)數(shu)值(zhi)時，儀表(biao)指(zhi)示值(zhi)之(zhi)間的(de)大差值(zhi)，或者(zhe)說是(shi)儀表(biao)在外界條件不變(bian)(bian)的(de)情(qing)況(kuang)下，被(bei)測(ce)參(can)數(shu)由(you)小到(dao)大變(bian)(bian)化（正向特(te)性）和被(bei)測(ce)參(can)數(shu)由(you)大到(dao)小變(bian)(bian)化（反向特(te)性）不一(yi)致的(de)程度，兩者(zhe)之(zhi)差即為儀表(biao)變(bian)(bian)差。
3、靈敏度(du)
靈敏(min)度(du)(du)(du)是(shi)指儀(yi)表(biao)(biao)對(dui)被(bei)(bei)測參數變(bian)化(hua)的(de)靈敏(min)程度(du)(du)(du)，或者(zhe)說是(shi)對(dui)被(bei)(bei)測的(de)量變(bian)化(hua)的(de)反(fan)應能力，是(shi)在穩(wen)態(tai)下，輸出(chu)變(bian)化(hua)增(zeng)量對(dui)輸入變(bian)化(hua)增(zeng)量的(de)比(bi)(bi)值：靈敏(min)度(du)(du)(du)有(you)時(shi)也稱“放(fang)大(da)(da)比(bi)(bi)”，也是(shi)儀(yi)表(biao)(biao)靜(jing)特性貼切(qie)線上(shang)各(ge)點的(de)斜率。增(zeng)加放(fang)大(da)(da)倍數可以(yi)提高儀(yi)表(biao)(biao)靈敏(min)度(du)(du)(du)，單純加大(da)(da)靈敏(min)度(du)(du)(du)并(bing)不改變(bian)儀(yi)表(biao)(biao)的(de)基本性能，即儀(yi)表(biao)(biao)精度(du)(du)(du)并(bing)沒(mei)有(you)提高，相(xiang)反(fan)有(you)時(shi)會出(chu)現振蕩現象，造成輸出(chu)不穩(wen)定。儀(yi)表(biao)(biao)靈敏(min)度(du)(du)(du)應保持適當的(de)量。