溫度變送器的選型與使用

安徽(hui)天康集(ji)團生(sheng)產(chan)各種溫(wen)(wen)(wen)度變(bian)(bian)(bian)送(song)(song)(song)(song)(song)器(qi)(qi)，有導軌(gui)式，智能型，簡易式等(deng)溫(wen)(wen)(wen)度變(bian)(bian)(bian)送(song)(song)(song)(song)(song)器(qi)(qi)采用熱電(dian)(dian)偶、熱電(dian)(dian)阻作為測溫(wen)(wen)(wen)元件(jian)，從(cong)測溫(wen)(wen)(wen)元件(jian)輸(shu)出(chu)(chu)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)送(song)(song)(song)(song)(song)到變(bian)(bian)(bian)送(song)(song)(song)(song)(song)器(qi)(qi)模塊，經過穩壓濾波、運算放大、非線(xian)性校正、V/I轉換(huan)、恒流(liu)及(ji)反(fan)向保護等(deng)電(dian)(dian)路(lu)處理(li)后，轉換(huan)成與溫(wen)(wen)(wen)度成線(xian)性關系的4～20mA電(dian)(dian)流(liu)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)0-5V/0-10V電(dian)(dian)壓信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)，RS485數字(zi)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)輸(shu)出(chu)(chu)。溫(wen)(wen)(wen)度變(bian)(bian)(bian)送(song)(song)(song)(song)(song)器(qi)(qi)是(shi)將將物理(li)測量信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)或普(pu)通電(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)轉換(huan)為標(biao)準(zhun)電(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)輸(shu)出(chu)(chu)或能夠(gou)以通訊協議方式輸(shu)出(chu)(chu)的設備。溫(wen)(wen)(wen)度變(bian)(bian)(bian)送(song)(song)(song)(song)(song)器(qi)(qi)是(shi)將溫(wen)(wen)(wen)度變(bian)(bian)(bian)量轉換(huan)為可傳送(song)(song)(song)(song)(song)的標(biao)準(zhun)化輸(shu)出(chu)(chu)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)的儀表，主(zhu)要用于工(gong)業過程溫(wen)(wen)(wen)度參(can)數的測量和(he)控(kong)制。電(dian)(dian)流(liu)變(bian)(bian)(bian)送(song)(song)(song)(song)(song)器(qi)(qi)是(shi)將被測主(zhu)回路(lu)交流(liu)電(dian)(dian)流(liu)轉換(huan)成恒流(liu)環標(biao)準(zhun)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)，連(lian)續輸(shu)送(song)(song)(song)(song)(song)到接收裝置。

溫(wen)(wen)(wen)(wen)度(du)(du)(du)電(dian)(dian)(dian)(dian)流變(bian)(bian)(bian)送(song)(song)(song)器是(shi)把(ba)溫(wen)(wen)(wen)(wen)度(du)(du)(du)傳(chuan)(chuan)感(gan)器的(de)信(xin)號轉變(bian)(bian)(bian)為電(dian)(dian)(dian)(dian)流信(xin)號，連接(jie)(jie)到二次(ci)儀表(biao)上，從而顯(xian)示出(chu)對應(ying)的(de)溫(wen)(wen)(wen)(wen)度(du)(du)(du)。比如(ru)(ru)，圖(tu)中(zhong)該溫(wen)(wen)(wen)(wen)度(du)(du)(du)傳(chuan)(chuan)感(gan)器的(de)型(xing)號為PT100，那么溫(wen)(wen)(wen)(wen)度(du)(du)(du)電(dian)(dian)(dian)(dian)流變(bian)(bian)(bian)送(song)(song)(song)器的(de)作用(yong)就是(shi)把(ba)電(dian)(dian)(dian)(dian)阻(zu)信(xin)號轉變(bian)(bian)(bian)為電(dian)(dian)(dian)(dian)流信(xin)號，輸入儀表(biao)，顯(xian)示溫(wen)(wen)(wen)(wen)度(du)(du)(du)。溫(wen)(wen)(wen)(wen)度(du)(du)(du)變(bian)(bian)(bian)送(song)(song)(song)器的(de)供(gong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源(yuan)不(bu)得有(you)尖峰，否(fou)則容易損壞變(bian)(bian)(bian)送(song)(song)(song)器。變(bian)(bian)(bian)送(song)(song)(song)器的(de)校準應(ying)在加電(dian)(dian)(dian)(dian)5分鐘后進(jin)行(xing)，并且(qie)要注意(yi)當(dang)時(shi)環境(jing)溫(wen)(wen)(wen)(wen)度(du)(du)(du)。測(ce)高溫(wen)(wen)(wen)(wen)時(shi)(>>100℃)傳(chuan)(chuan)感(gan)器腔與接(jie)(jie)線(xian)盒(he)間應(ying)用(yong)填充材(cai)料隔(ge)離，防止接(jie)(jie)線(xian)盒(he)溫(wen)(wen)(wen)(wen)度(du)(du)(du)過高燒壞變(bian)(bian)(bian)送(song)(song)(song)器。在干擾(rao)嚴重的(de)情況下(xia)(xia)使(shi)用(yong)傳(chuan)(chuan)感(gan)器，外(wai)殼(ke)應(ying)牢固接(jie)(jie)地避免干擾(rao)，電(dian)(dian)(dian)(dian)源(yuan)及信(xin)號輸出(chu)應(ying)采用(yong)Ф10屏蔽電(dian)(dian)(dian)(dian)纜傳(chuan)(chuan)輸，壓線(xian)螺母應(ying)旋緊(jin)(jin)以(yi)保(bao)證(zheng)氣密性。只有(you)RWB型(xing)溫(wen)(wen)(wen)(wen)度(du)(du)(du)變(bian)(bian)(bian)送(song)(song)(song)器有(you)0~10mA輸出(chu)，為三線(xian)制(zhi)，在量(liang)程值的(de)5%以(yi)下(xia)(xia),由于三極管的(de)關(guan)斷特性造成不(bu)線(xian)性。溫(wen)(wen)(wen)(wen)度(du)(du)(du)變(bian)(bian)(bian)送(song)(song)(song)器每6個(ge)月應(ying)校準一(yi)次(ci)，如(ru)(ru)果DWB因受電(dian)(dian)(dian)(dian)路限制(zhi)不(bu)能進(jin)行(xing)線(xian)性修正(zheng)，最(zui)好按說明選擇量(liang)程以(yi)保(bao)證(zheng)其(qi)線(xian)性。1、安裝(zhuang)前，檢查配件是(shi)否(fou)齊(qi)全，緊(jin)(jin)固件有(you)無松動,將天線(xian)擰緊(jin)(jin)。

2、安裝時，注意輕(qing)拿輕(qing)放，切(qie)勿敲(qiao)、摔。將天線(xian)擰緊后即可正常工作(zuo)

3、安(an)裝后(hou)，加電后(hou)，禁止(zhi)非操(cao)(cao)作人員(yuan)打開(kai)前蓋，如操(cao)(cao)作人員(yuan)誤操(cao)(cao)作后(hou)，嚴(yan)禁保存，斷電后(hou)重新開(kai)啟即可。

溫度變送器的選型與使用