SBWZ-2480/230一體化變送器

一體化防爆熱電(dian)阻的(de)輸(shu)出(chu)為統一的(de)4～20mA；可與(yu)微機或其(qi)它常規儀表匹(pi)配使用。

傳感器(qi)(qi)連接(jie)形成(cheng)一(yi)(yi)體化，輸(shu)出(chu)(chu)(chu)(chu)(chu)4-20mA 電(dian)(dian)流(liu)或(huo)也可(ke)(ke)以輸(shu)出(chu)(chu)(chu)(chu)(chu)0-5V或(huo)1-5V的(de)(de)(de)(de)(de)電(dian)(dian)壓。通常和顯示儀表、記錄儀表、電(dian)(dian)子(zi)計算機等(deng)配套用(yong)(yong)，直接(jie)測(ce)量(liang)各種生(sheng)產(chan)中(zhong)的(de)(de)(de)(de)(de)0度(du)(du)-500度(du)(du)范(fan)圍(wei)(wei)內(nei)的(de)(de)(de)(de)(de)、蒸汽和氣(qi)(qi)體介(jie)質以及(ji)固體表面溫(wen)(wen)(wen)(wen)度(du)(du)。溫(wen)(wen)(wen)(wen)度(du)(du)變(bian)送(song)器(qi)(qi)一(yi)(yi)般由(you)基準源、冷(leng)端補(bu)償(chang)、放大(da)單(dan)元、線性化處(chu)理、V/I轉(zhuan)(zhuan)換、斷(duan)偶處(chu)理、反(fan)接(jie)保(bao)護、限流(liu)保(bao)護等(deng)電(dian)(dian)路(lu)單(dan)元組成(cheng)。它是(shi)將(jiang)熱(re)電(dian)(dian)阻(zu)(zu)(zu)產(chan)生(sheng)的(de)(de)(de)(de)(de)電(dian)(dian)阻(zu)(zu)(zu)經冷(leng)端補(bu)償(chang)放大(da)后(hou)(hou)，再帽由(you)線性電(dian)(dian)路(lu)電(dian)(dian)阻(zu)(zu)(zu)與(yu)溫(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)(de)(de)(de)非(fei)線性誤(wu)差(cha)，后(hou)(hou)放大(da)轉(zhuan)(zhuan)換為4～20mA電(dian)(dian)流(liu)輸(shu)出(chu)(chu)(chu)(chu)(chu)。它是(shi)將(jiang)熱(re)電(dian)(dian)阻(zu)(zu)(zu)產(chan)生(sheng)的(de)(de)(de)(de)(de)電(dian)(dian)阻(zu)(zu)(zu)經冷(leng)端補(bu)償(chang)放大(da)后(hou)(hou)，再帽由(you)線性電(dian)(dian)路(lu)電(dian)(dian)阻(zu)(zu)(zu)與(yu)溫(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)(de)(de)(de)非(fei)線性誤(wu)差(cha)，后(hou)(hou)放大(da)轉(zhuan)(zhuan)換為4～20mA電(dian)(dian)流(liu)輸(shu)出(chu)(chu)(chu)(chu)(chu)。為防止熱(re)電(dian)(dian)阻(zu)(zu)(zu)測(ce)量(liang)中(zhong)由(you)于(yu)斷(duan)絲而使(shi)控(kong)溫(wen)(wen)(wen)(wen)失效造(zao)成(cheng)事(shi)故，變(bian)送(song)器(qi)(qi)中(zhong)還設有斷(duan)電(dian)(dian)保(bao)護電(dian)(dian)路(lu)。當熱(re)電(dian)(dian)絲或(huo)接(jie)解不(bu)良時(shi)，變(bian)送(song)器(qi)(qi)會輸(shu)出(chu)(chu)(chu)(chu)(chu)大(da)值（28mA）以使(shi)儀表切斷(duan)電(dian)(dian)源。　溫(wen)(wen)(wen)(wen)度(du)(du)變(bian)送(song)器(qi)(qi)模塊為24V供電(dian)(dian)、二線制(zhi)或(huo)三(san)線制(zhi)的(de)(de)(de)(de)(de)一(yi)(yi)體化熱(re)電(dian)(dian)阻(zu)(zu)(zu)。產(chan)品采用(yong)(yong)進口集成(cheng)電(dian)(dian)路(lu)，將(jiang)熱(re)電(dian)(dian)阻(zu)(zu)(zu)的(de)(de)(de)(de)(de)放大(da)，并(bing)轉(zhuan)(zhuan)換成(cheng)4-20mA的(de)(de)(de)(de)(de)輸(shu)出(chu)(chu)(chu)(chu)(chu)電(dian)(dian)流(liu),或(huo)0～5V的(de)(de)(de)(de)(de)輸(shu)出(chu)(chu)(chu)(chu)(chu)電(dian)(dian)壓。其中(zhong)鎧(kai)裝變(bian)送(song)器(qi)(qi)可(ke)(ke)以直接(jie)測(ce)量(liang)氣(qi)(qi)體或(huo)的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)度(du)(du)特(te)別適用(yong)(yong)于(yu)低(di)溫(wen)(wen)(wen)(wen)范(fan)圍(wei)(wei)測(ce)量(liang)，克服了冷(leng)凝水(shui)對測(ce)溫(wen)(wen)(wen)(wen)所帶來(lai)的(de)(de)(de)(de)(de)影響.

WZ-2480/WZPK-230鎧裝熱電(dian)阻上海自動(dong)化儀表三(san)廠

工作原理
鎧(kai)裝熱電(dian)(dian)(dian)阻(zu)工作原理：在(zai)溫度作用(yong)下，熱電(dian)(dian)(dian)阻(zu)絲(si)的電(dian)(dian)(dian)阻(zu)隨之變化而變化，顯示儀表將會指示熱電(dian)(dian)(dian)阻(zu)產(chan)生的電(dian)(dian)(dian)阻(zu)值所對應(ying)的溫度值。
主(zhu)要技術指標 
熱(re)電(dian)阻(zu)感(gan)溫元件100℃時(shi)的電(dian)阻(zu)值(zhi)（R100）和它在0℃時(shi)的電(dian)阻(zu)R0比值(zhi)：（R100/R0）
分度號Pt100： R0=100±0.06Ω 
B級 R0=100±0.12Ω
R0/R100=1.3850

量程規格

型號(hao)表示

其中(zhong)鎧裝變送器可以(yi)直接測量氣體(ti)或的溫度(du)特別適用(yong)于低(di)溫范圍測量，克服了冷凝水對測溫所帶(dai)來的影響.

隔(ge)爆(bao)熱(re)電(dian)偶（阻）利用間隙隔(ge)爆(bao)原理(li)，當發(fa)生時，能通過接合面間隙熄火和冷卻，使后(hou)的(de)(de)火焰和溫(wen)度(du)傳(chuan)不到腔(qiang)外，從而進(jin)行測溫(wen)。熱(re)電(dian)偶（阻）產(chan)生的(de)(de)熱(re)電(dian)勢（電(dian)阻值(zhi)(zhi)）經過溫(wen)度(du)變(bian)送(song)器的(de)(de)電(dian)橋產(chan)生不平衡，經放(fang)大后(hou)轉換成為4-20mA的(de)(de)直流電(dian)給工(gong)作儀(yi)表，工(gong)作儀(yi)表顯示出(chu)所對應的(de)(de)溫(wen)度(du)值(zhi)(zhi)。

工(gong)作(zuo)原理熱(re)電(dian)偶(ou)（阻(zu)）在工(gong)作(zuo)狀態(tai)下所測得(de)的(de)熱(re)電(dian)勢（電(dian)阻(zu)）的(de)變化，經過溫(wen)度(du)變送器的(de)電(dian)橋產(chan)生不平(ping)衡，經放大后轉換成(cheng)為4-20mA電(dian)給(gei)工(gong)作(zuo)儀(yi)表，工(gong)作(zuo)儀(yi)表便顯示所對應的(de)溫(wen)度(du)值(zhi)。

主要技術參數產品執行(xing)IEC584IEC751IEC1515JB/T5518-91JB/T7391-94類 別(bie) ：W 模塊式溫變 W 一(yi)體化 　準 確 度：0.2%F.S 0.5%F.S 　輸 入 熱電阻：Cu50,Cu100,pt100,tp1000 　輸 出 ：二線制(zhi) 4-20mA DC 或者三線制(zhi) 4-20mA DC，負載電阻250 1/2、傳(chuan)輸導線 電阻100 1/2 　使用溫度： -25-85 ℃ （一(yi)體化 LCD 表頭(tou)時 0-60 ℃ ） 

SBWZ-2480/230一體化變送器