WZPKB2--241S一體化智能顯示隔爆(bao)鎧(kai)裝熱電阻(zu)

一體化(hua)防爆熱電阻通常和顯(xian)示儀(yi)表(biao)、記錄(lu)儀(yi)表(biao)、電子計算機等(deng)配套(tao)使用，輸(shu)出(chu)4～20mA。直(zhi)接測(ce)量各種生產過程中的0～1800℃范(fan)圍內液(ye)體、蒸汽和氣體介質以及固體表(biao)面(mian)溫度。

簡介一(yi)(yi)體(ti)(ti)(ti)(ti)(ti)化(hua)(hua)防(fang)爆(bao)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)的(de)(de)輸出(chu)為(wei)統(tong)一(yi)(yi)的(de)(de)4～20mA信(xin)(xin)號(hao)；可(ke)與(yu)微機系統(tong)或(huo)其它常規(gui)儀表(biao)匹配使用(yong)。也(ye)可(ke)用(yong)戶要求做成(cheng)(cheng)防(fang)爆(bao)型或(huo)防(fang)火型測(ce)(ce)量(liang)(liang)(liang)儀表(biao)帶溫(wen)(wen)(wen)(wen)(wen)度(du)(du)變(bian)送(song)(song)器(qi)(qi)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)又(you)稱一(yi)(yi)體(ti)(ti)(ti)(ti)(ti)化(hua)(hua)防(fang)爆(bao)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)，一(yi)(yi)體(ti)(ti)(ti)(ti)(ti)化(hua)(hua)防(fang)爆(bao)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)是指(zhi)在熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)的(de)(de)防(fang)水或(huo)隔爆(bao)接線盒內裝入放大(da)(da)(da)變(bian)送(song)(song)模塊（即(ji)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)變(bian)送(song)(song)器(qi)(qi)），與(yu)傳感器(qi)(qi)連接形成(cheng)(cheng)一(yi)(yi)體(ti)(ti)(ti)(ti)(ti)化(hua)(hua)，輸出(chu)標準4-20mA 電(dian)(dian)(dian)(dian)(dian)流(liu)信(xin)(xin)號(hao)或(huo)也(ye)可(ke)以(yi)輸出(chu)0-5V或(huo)1-5V的(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)信(xin)(xin)號(hao)。通常和(he)顯示(shi)儀表(biao)、記(ji)錄儀表(biao)、電(dian)(dian)(dian)(dian)(dian)子計算機等配套用(yong)，直(zhi)接測(ce)(ce)量(liang)(liang)(liang)各(ge)種生產過程中的(de)(de)0度(du)(du)-500度(du)(du)范(fan)圍(wei)內的(de)(de)液體(ti)(ti)(ti)(ti)(ti)、蒸汽和(he)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)介質以(yi)及固體(ti)(ti)(ti)(ti)(ti)表(biao)面溫(wen)(wen)(wen)(wen)(wen)度(du)(du)。溫(wen)(wen)(wen)(wen)(wen)度(du)(du)變(bian)送(song)(song)器(qi)(qi)一(yi)(yi)般由(you)基準源、冷端補償(chang)、放大(da)(da)(da)單元(yuan)、線性化(hua)(hua)處理、V/I轉換(huan)、斷(duan)偶處理、反接保護、限流(liu)保護等電(dian)(dian)(dian)(dian)(dian)路(lu)單元(yuan)組(zu)成(cheng)(cheng)。它是將熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)產生的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)經(jing)冷端補償(chang)放大(da)(da)(da)后，再帽(mao)由(you)線性電(dian)(dian)(dian)(dian)(dian)路(lu)消除電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)與(yu)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)非線性誤差，最(zui)后放大(da)(da)(da)轉換(huan)為(wei)4～20mA電(dian)(dian)(dian)(dian)(dian)流(liu)輸出(chu)信(xin)(xin)號(hao)。為(wei)防(fang)止熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)測(ce)(ce)量(liang)(liang)(liang)中由(you)于(yu)斷(duan)絲(si)而使控溫(wen)(wen)(wen)(wen)(wen)失效造成(cheng)(cheng)事故，變(bian)送(song)(song)器(qi)(qi)中還設有斷(duan)電(dian)(dian)(dian)(dian)(dian)保護電(dian)(dian)(dian)(dian)(dian)路(lu)。當熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)斷(duan)絲(si)或(huo)接解不(bu)良(liang)時，變(bian)送(song)(song)器(qi)(qi)會輸出(chu)最(zui)大(da)(da)(da)值（28mA）以(yi)使儀表(biao)切斷(duan)電(dian)(dian)(dian)(dian)(dian)源。　溫(wen)(wen)(wen)(wen)(wen)度(du)(du)變(bian)送(song)(song)器(qi)(qi)模塊為(wei)24V供電(dian)(dian)(dian)(dian)(dian)、二線制或(huo)三(san)線制的(de)(de)一(yi)(yi)體(ti)(ti)(ti)(ti)(ti)化(hua)(hua)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)。產品采用(yong)進口集成(cheng)(cheng)電(dian)(dian)(dian)(dian)(dian)路(lu)，將熱(re)(re)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)的(de)(de)信(xin)(xin)號(hao)放大(da)(da)(da)，并轉換(huan)成(cheng)(cheng)4-20mA的(de)(de)輸出(chu)電(dian)(dian)(dian)(dian)(dian)流(liu),或(huo)0～5V的(de)(de)輸出(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)。其中鎧(kai)裝變(bian)送(song)(song)器(qi)(qi)可(ke)以(yi)直(zhi)接測(ce)(ce)量(liang)(liang)(liang)氣(qi)(qi)體(ti)(ti)(ti)(ti)(ti)或(huo)液體(ti)(ti)(ti)(ti)(ti)的(de)(de)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)特別適用(yong)于(yu)低(di)溫(wen)(wen)(wen)(wen)(wen)范(fan)圍(wei)測(ce)(ce)量(liang)(liang)(liang)，克服(fu)了冷凝水對測(ce)(ce)溫(wen)(wen)(wen)(wen)(wen)所帶來的(de)(de)影(ying)響.

特點二線制輸出4-20mA，抗干擾能力強；節省(sheng)補償(chang)導線及安(an)裝溫度變送器費用(yong)(yong)；安(an)全可靠，使用(yong)(yong)壽(shou)命長；冷(leng)端溫度自(zi)動補償(chang)，非線性(xing)校正電路 ；

工(gong)(gong)作(zuo)原理熱(re)電(dian)(dian)(dian)偶(ou)（阻(zu)）在工(gong)(gong)作(zuo)狀態下所(suo)測得的(de)(de)(de)熱(re)電(dian)(dian)(dian)勢（電(dian)(dian)(dian)阻(zu)）的(de)(de)(de)變化，經過(guo)(guo)溫(wen)(wen)(wen)度(du)變送器(qi)的(de)(de)(de)電(dian)(dian)(dian)橋產生不平(ping)衡信(xin)(xin)號，經放大后(hou)(hou)轉(zhuan)換成為4-20mA電(dian)(dian)(dian)信(xin)(xin)號給(gei)工(gong)(gong)作(zuo)儀(yi)(yi)表，工(gong)(gong)作(zuo)儀(yi)(yi)表便顯(xian)示所(suo)對(dui)應的(de)(de)(de)溫(wen)(wen)(wen)度(du)值(zhi)。隔(ge)爆(bao)熱(re)電(dian)(dian)(dian)偶(ou)（阻(zu)）利(li)用間(jian)(jian)隙(xi)隔(ge)爆(bao)原理，當腔內發生爆(bao)炸(zha)時(shi)，能(neng)通過(guo)(guo)接(jie)合面間(jian)(jian)隙(xi)熄火(huo)和(he)冷卻，使爆(bao)炸(zha)后(hou)(hou)的(de)(de)(de)火(huo)焰(yan)和(he)溫(wen)(wen)(wen)度(du)傳不到腔外，從而進行測溫(wen)(wen)(wen)。熱(re)電(dian)(dian)(dian)偶(ou)（阻(zu)）產生的(de)(de)(de)熱(re)電(dian)(dian)(dian)勢（電(dian)(dian)(dian)阻(zu)值(zhi)）經過(guo)(guo)溫(wen)(wen)(wen)度(du)變送器(qi)的(de)(de)(de)電(dian)(dian)(dian)橋產生不平(ping)衡信(xin)(xin)號，經放大后(hou)(hou)轉(zhuan)換成為4-20mA的(de)(de)(de)直流電(dian)(dian)(dian)信(xin)(xin)號給(gei)工(gong)(gong)作(zuo)儀(yi)(yi)表，工(gong)(gong)作(zuo)儀(yi)(yi)表顯(xian)示出(chu)所(suo)對(dui)應的(de)(de)(de)溫(wen)(wen)(wen)度(du)值(zhi)。

主要技術參數產品執行(xing)標準(zhun)IEC584IEC751IEC1515JB/T5518-91JB/T7391-94類 別 ：SBW 模(mo)塊(kuai)式溫(wen)變 SBW 一(yi)體(ti)化(hua) 　準(zhun) 確 度(du)(du)：0.2%F.S 0.5%F.S 　輸 入 熱(re)電阻：Cu50,Cu100,pt100,tp1000 　輸 出 ：二線制 4-20mA DC 或者(zhe)三線制 4-20mA DC，負(fu)載電阻250 1/2、傳輸導線 電阻100 1/2 　使用(yong)(yong)溫(wen)度(du)(du)： -25-85 ℃ （一(yi)體(ti)化(hua) LCD 表頭時 0-60 ℃ ） 　溫(wen)度(du)(du)影響(xiang)： ≤0.05%/ ℃ 　濕 度(du)(du) ：5-95%RH 　現(xian)(xian)場(chang)顯示： 無(wu)(wu) 3　1/2LED 3 1/2LCD 0- 等(deng)分刻度(du)(du) 　顯示精(jing)度(du)(du)： 無(wu)(wu) 數字式： 0.5 級(ji)(ji)(ji) 指(zhi)(zhi)針(zhen)(zhen)式： 2.0 級(ji)(ji)(ji) 　負(fu)載能力 ：< 600 Ω （額(e)定(ding)負(fu)載 250 Ω ） 　外形尺寸： 44×18 70 ×100（中繼(ji)器） 　允(yun)差等(deng)級(ji)(ji)(ji)：0.1,0.2,0.5 　供(gong)電電源：24V.DC±10% 　防護(hu)(hu)等(deng)級(ji)(ji)(ji)：IP65 　防爆等(deng)級(ji)(ji)(ji)： dIIBT4 、 dIIBT5 。CT4 、 CT6 　超小型(xing)（模(mo)塊(kuai)φ44×18 ）一(yi)體(ti)化(hua)，通(tong)(tong)用(yong)(yong)性強 　冷(leng)端、溫(wen)漂、非線形自動(dong)補償(chang)。 　測量精(jing)度(du)(du)高(gao)，長期穩(wen)定(ding)性好。 　溫(wen)度(du)(du)模(mo)塊(kuai)內部采(cai)用(yong)(yong)環(huan)氧樹脂(zhi)澆注工藝，適應于(yu)各種(zhong)惡劣和(he)危(wei)險場(chang)所使用(yong)(yong)。 　一(yi)體(ti)化(hua)設計(ji)，結構簡(jian)單合理，可(ke)(ke)直接替(ti)換(huan)普通(tong)(tong)裝配式熱(re)電偶。 　機械保護(hu)(hu) IP68。 　采(cai)用(yong)(yong)熱(re)電阻溫(wen)變，可(ke)(ke)免用(yong)(yong)補償(chang)導線，降低成本(ben) 　液晶、數碼(ma)管、指(zhi)(zhi)針(zhen)(zhen)等(deng)多種(zhong)指(zhi)(zhi)示功(gong)能方便現(xian)(xian)場(chang)適時監控。 　現(xian)(xian)場(chang)環(huan)境溫(wen)度(du)(du) >70 ℃ 時，變送(song)器和(he)現(xian)(xian)場(chang)顯示儀表可(ke)(ke)采(cai)用(yong)(yong)分離（隔離）式安裝。如條件(jian)不(bu)允(yun)許可(ke)(ke)采(cai)用(yong)(yong)延長保護(hu)(hu)管長度(du)(du)的方法以達到保護(hu)(hu)溫(wen)度(du)(du)變送(song)器的目的。

測量范圍及允差