一體化智能型溫度變送器，SBWR-2281/240I主(zhu)要特點(dian)：一體化智能型溫度變送器，SBWR-2281/240I
●  ;采用硅橡膠(jiao)或(huo)環氧(yang)樹(shu)脂密封(feng)結構，因此耐(nai)震、耐(nai)濕，適合在(zai)現(xian)場環境中安裝使用；
●  現場(chang)安裝在熱電偶，熱電阻的(de)接(jie)線(xian)(xian)盒內使(shi)用，直接(jie)輸(shu)(shu)出(chu)(chu)4-20mA、0-10mA的(de)輸(shu)(shu)出(chu)(chu)信號。這樣既(ji)節約(yue)了昂貴的(de)補償導線(xian)(xian)費(fei)用，又提高了信號遠距(ju)離傳輸(shu)(shu)過(guo)程中的(de)抗干擾(rao)能力；
●  熱電偶變(bian)送器具有冷(leng)端自動補償功能；精度高、功耗低，使用(yong)環境溫(wen)度范圍寬，工作穩定可靠；
●  適用(yong)(yong)范圍廣,即(ji)可(ke)(ke)以(yi)與熱(re)(re)電偶(ou),熱(re)(re)電阻形(xing)成一體化現(xian)場安(an)(an)裝結構,也可(ke)(ke)以(yi)作為(wei)功能模(mo)塊安(an)(an)裝在檢測設備中和儀表盤上使用(yong)(yong):
工作原理：
熱(re)電(dian)(dian)(dian)偶(ou)或熱(re)電(dian)(dian)(dian)阻(zu)傳(chuan)(chuan)感(gan)(gan)器(qi)(qi)(qi)被溫度轉(zhuan)換成電(dian)(dian)(dian)信(xin)(xin)號(hao),再將信(xin)(xin)號(hao)送入(ru)變(bian)(bian)送器(qi)(qi)(qi)的(de)輸入(ru)網絡,該(gai)網絡包含(han)調(diao)零和熱(re)電(dian)(dian)(dian)偶(ou)補償等相(xiang)關(guan)電(dian)(dian)(dian)路。經調(diao)零后的(de)信(xin)(xin)號(hao)輸入(ru)到運算放大器(qi)(qi)(qi)進(jin)行(xing)(xing)信(xin)(xin)號(hao)放大，放大的(de)信(xin)(xin)號(hao)一(yi)經V/I轉(zhuan)換器(qi)(qi)(qi)運算處(chu)(chu)理后以DC4-20mA電(dian)(dian)(dian)流輸出(chu)；另一(yi)路經A/D轉(zhuan)換器(qi)(qi)(qi)處(chu)(chu)理后到表頭顯(xian)示(shi)(shi)。變(bian)(bian)送器(qi)(qi)(qi)的(de)線(xian)(xian)性化電(dian)(dian)(dian)路有兩種(zhong)，均采(cai)用(yong)反饋方(fang)式(shi)。對熱(re)電(dian)(dian)(dian)阻(zu)傳(chuan)(chuan)感(gan)(gan)器(qi)(qi)(qi)，用(yong)正反方(fang)式(shi)校正，對熱(re)電(dian)(dian)(dian)偶(ou)傳(chuan)(chuan)感(gan)(gan)器(qi)(qi)(qi)，用(yong)多段折(zhe)線(xian)(xian)逼近法(fa)進(jin)行(xing)(xing)校正。一(yi)體化數(shu)字顯(xian)示(shi)(shi)溫度變(bian)(bian)送器(qi)(qi)(qi)LCD顯(xian)示(shi)(shi)的(de)采(cai)用(yong)兩線(xian)(xian)制方(fang)式(shi)輸出(chu)。
技術參數
1.輸入(ru)信(xin)(xin)號：熱(re)電偶：K、E、J、B、S、T、N；熱(re)電阻：Pt100、Cu50、 Cu100、（三線制(zhi)、四線制(zhi)），智能型溫度(du)變(bian)送器的輸入(ru)信(xin)(xin)號可通過PC機或(huo)手操器任意設置(zhi)；
2.輸(shu)出(chu)信(xin)(xin)號：在量(liang)程范圍內輸(shu)出(chu)DC4-20mA電(dian)(dian)流信(xin)(xin)號，與(yu)(yu)熱電(dian)(dian)偶、熱電(dian)(dian)阻(zu)的輸(shu)入信(xin)(xin)號成(cheng)線性或(huo)與(yu)(yu)溫(wen)度(du)成(cheng)線性。智能型溫(wen)度(du)變送器輸(shu)出(chu)DC4-20mA電(dian)(dian)流信(xin)(xin)號同時疊加符合HART標準協議(yi)通信(xin)(xin)信(xin)(xin)號；
3.基本誤(wu)差：0.5%FS；0.2%FS；智能型0.2%FS;
4.接線(xian)方(fang)式：二(er)線(xian)制(zhi)；三線(xian)制(zhi);
5.顯(xian)示方(fang)式：四位LCD顯(xian)示溫度,智能(neng)型四位LCD可通(tong)過PC機(ji)或手操器設定使之(zhi)顯(xian)示現場溫度，傳感器值，輸出電流和百分比例中的任一種參數;
6.工作電壓：普通型12∽35V DC；智能型12V∽45V DC；額定(ding)工作電壓為24V DC;
7.允許負(fu)(fu)載電(dian)(dian)阻(zu)：500Ω（24VDC供電(dian)(dian)）;極限負(fu)(fu)載電(dian)(dian)阻(zu)R（max）=50（Vmin-12）,例如(ru)在額定工(gong)作電(dian)(dian)壓24V DC時(shi),負(fu)(fu)載電(dian)(dian)阻(zu)可0-600Ω范圍內(nei)選擇使(shi)用。
8.工作環境：
a：環境溫度(du) -25∽80℃（常規型）
            -25∽70℃（數(shu)顯型）
b：相對溫度(du) 5%∽95%
c：機械振(zhen)動f≤50HZ,振(zhen)幅≤0.15mm
d：無(wu)腐蝕(shi)氣體或類似的環境(jing);
9.溫度影響系數：δ≤0.05%/℃
 鎧裝(zhuang)鉑熱波膜(mo)電(dian)阻(zu)，WZPK-105U，WZPK-324U，WZPK-364U，WZPK-264U，WZPK-163U，WZPK-523U，WZP-421D，WZPK-103U，WRP2-121B，WZP2-74S化工隔(ge)爆(bao)熱電(dian)阻(zu)，WRR-131，WRR2-131，WRN-230D，WRE-210D，WRN-430D，WRNK-431，WRK-240，WRK-520，WRS-132，WRT