ZX99A多值電阻器
ZX99A多值電阻器供直流電路中調節阻值之用,具有較低的殘余電阻,為一般實驗室較常用儀器,適合學校、工礦、科研和計量單位作電測量和其它實驗之用。
產品型號:
我們(men)的質量方針:以客(ke)戶需求(qiu)為(wei)(wei)(wei)宗旨,以科技(ji)創新(xin)為(wei)(wei)(wei)動(dong)力,以嚴格管理(li)為(wei)(wei)(wei)保證,以水(shui)平為(wei)(wei)(wei)目(mu)標(biao),為(wei)(wei)(wei)廣大(da)客(ke)戶提供滿意的產品和(he)服務。
我(wo)們的價值(zhi)觀:團結(jie)和睦(mu)、志同(tong)道合、誠實守信(xin)、尊崇創(chuang)新、嚴(yan)謹(jin)守紀、
一、用途(tu)
本多值電阻器供直流電路中調節阻值之(zhi)用(yong),具有較低的殘余電阻,為一般實驗室(shi)常用(yong)儀(yi)器,適合學(xue)校、工礦、科研和計量單位(wei)作電測量和其它實驗之(zhi)用(yong)。
本型電阻器適合在(zai)溫(wen)度為5~35℃、相(xiang)對濕度≤80%的環境(jing)下使用(保(bao)證準確度溫(wen)度為20±1.5℃)。
二、ZX99A多值電阻器主要技術指標
三、ZX99A多值電阻器結構
本型電阻(zu)器采用(yong)特殊變換開(kai)關,每組(zu)電阻(zu)按(an)2、2、2、2、2、2排(pai)列,通過開(kai)關變換組(zu)合出0~10檔位。內部電阻(zu)采用(yong)高穩定(ding)錳(meng)銅合金線(xian)于瓷管上作無(wu)感式繞制,并經(jing)過嚴格的人(ren)工老化處理、長期考核、篩選,因(yin)此具有(you)很穩定(ding)的電阻(zu)值。
四、使用注意事項
1、使(shi)用電(dian)阻器時,先將各旋(xuan)鈕來回旋(xuan)轉數次,以使(shi)接觸穩定可靠。
2、電阻器在使用中,功率(lv)絕(jue)不(bu)能超過各檔所規定的(de)參考值,否則會(hui)導致(zhi)電阻阻值變化甚至燒壞(huai)。
3、電(dian)阻(zu)器所給出的阻(zu)值中,不包含電(dian)阻(zu)器的殘余電(dian)阻(zu),使用和檢(jian)定時,應(ying)扣除殘余電(dian)阻(zu)。
4、本電阻器(qi)應存放在空氣溫度為5~45℃,相(xiang)對濕度
≤80%,不(bu)含有腐蝕儀(yi)器的(de)氣體和有害雜質的(de)室內,且儀(yi)器不(bu)受日光的(de)直接照射。
作用(yong)
小(xiao)功率(lv)電阻器(qi)通(tong)常為封裝在塑料外殼中的碳(tan)膜(mo)構成,而大功率(lv)的電阻器(qi)通(tong)常為繞(rao)線(xian)電阻器(qi),通(tong)過將大電阻率(lv)的金屬絲繞(rao)在瓷(ci)心上而制成。
如(ru)果(guo)(guo)一(yi)個(ge)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)值接近零歐(ou)(ou)姆(mu)(mu)(例如(ru),兩(liang)個(ge)點(dian)之(zhi)間(jian)的(de)(de)(de)大(da)(da)截(jie)面導線),則該(gai)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)對電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)沒有(you)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)礙作用(yong)(yong),并聯這種(zhong)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)的(de)(de)(de)回路(lu)(lu)(lu)被短(duan)路(lu)(lu)(lu),電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)無限大(da)(da)。如(ru)果(guo)(guo)一(yi)個(ge)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)具(ju)有(you)無限大(da)(da)的(de)(de)(de)或(huo)很(hen)大(da)(da)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu),則串(chuan)接該(gai)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)的(de)(de)(de)回路(lu)(lu)(lu)可看(kan)作開路(lu)(lu)(lu),電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)為(wei)零。工業中常(chang)用(yong)(yong)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)介于(yu)兩(liang)種(zhong)情況之(zhi)間(jian),它具(ju)有(you)一(yi)定的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu),可通過(guo)一(yi)定的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu),但電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)不像短(duan)路(lu)(lu)(lu)時那(nei)樣大(da)(da)。電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)的(de)(de)(de)限流(liu)(liu)作用(yong)(yong)類似于(yu)接在(zai)兩(liang)根大(da)(da)直徑管(guan)子之(zhi)間(jian)的(de)(de)(de)小直徑管(guan)子限制水(shui)流(liu)(liu)量的(de)(de)(de)作用(yong)(yong)。電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu),英文名resistance,通常(chang)縮寫為(wei)R,它是導體(ti)(ti)的(de)(de)(de)一(yi)種(zhong)基本性(xing)質,與導體(ti)(ti)的(de)(de)(de)尺寸、材料(liao)、溫度有(you)關。歐(ou)(ou)姆(mu)(mu)定律說(shuo),I=U/R,那(nei)么R=U/I,電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)的(de)(de)(de)基本單(dan)位是歐(ou)(ou)姆(mu)(mu),用(yong)(yong)希臘字母"Ω"表(biao)示(shi),有(you)這樣的(de)(de)(de)定義:導體(ti)(ti)上加上一(yi)伏特電(dian)(dian)(dian)(dian)(dian)壓時,產生一(yi)安培電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)所對應的(de)(de)(de)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)值。電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)的(de)(de)(de)主要職能(neng)就是阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)礙電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)流(liu)(liu)過(guo)。事實上,"電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)"說(shuo)的(de)(de)(de)是一(yi)種(zhong)性(xing)質,而通常(chang)在(zai)電(dian)(dian)(dian)(dian)(dian)子產品中所指的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu),是指電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)這樣一(yi)種(zhong)元(yuan)件(jian)。歐(ou)(ou)姆(mu)(mu)常(chang)簡稱為(wei)歐(ou)(ou)。表(biao)示(shi)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)阻(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)(zu)值的(de)(de)(de)常(chang)用(yong)(yong)單(dan)位還有(you)千(qian)歐(ou)(ou)(kΩ),兆(zhao)歐(ou)(ou)(MΩ),毫歐(ou)(ou)(m Ω)。
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