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□溫度變(bian)送器圖樣(yang)

□輸入信號：
熱電阻 Pt100、Cu50、Cu100,測量間距10℃以上任何溫度范圍
輸出信號：電流:(4～20)mA DC 
電壓:(1～5)V DC
輸出阻抗：250Ω 允許負載變化0～500Ω
基本誤差：±0.1%、±0.5% 熱電阻溫變
溫度漂移：±0.1%/10℃　熱電阻溫度
傳輸方式：兩線制傳輸
工作環境溫度： 溫度 -10～75℃ 濕度 ≤90%
電 源：24V DC±10%(或配電器、安全柵供電)
功 耗：≤0.5W,

□溫度變送器特點

1、采用環氧樹脂密封結構(gou)，因此抗震、耐溫，適(shi)合(he)在(zai)惡劣現(xian)場環境中安裝使用。

2、現場安(an)裝于熱(re)電(dian)阻、熱(re)電(dian)偶的(de)接線(xian)盒內，直接輸出4～20mA，這(zhe)樣(yang)既省去(qu)較貴(gui)的(de)補償(chang)導線(xian)費用，又(you)提高(gao)了信號長距離(li)傳送(song)過程中的(de)抗(kang)干(gan)擾能力(li)。

3、精度高、功耗低、使(shi)用環境溫度范圍寬、工作(zuo)穩定(ding)可靠。

4、量程可調，并(bing)具有線(xian)性化較正功能，熱電偶溫(wen)度變送(song)器(qi)具有冷端(duan)自動(dong)補償功能。應(ying)用(yong)面廣，既可與熱電偶、熱電阻形成一體化現場安(an)裝結構，也(ye)可作為功能模塊安(an)裝入(ru)檢測(ce)設備中。

□主要技術指標：

1、輸入(ru)：熱(re)(re)電阻Pt100、Cu50、Cu100 熱(re)(re)電偶(ou)K、E、S、B、T、J、N2、輸出：在量程范圍內(nei)輸出4～20mA直流信(xin)號(hao)(hao)(hao)可(ke)與(yu)熱(re)(re)電阻溫度(du)計的(de)輸出電阻信(xin)號(hao)(hao)(hao)成線性(xing)，可(ke)與(yu)熱(re)(re)電阻溫度(du)計的(de)輸入(ru)溫度(du)信(xin)號(hao)(hao)(hao)成線性(xing)；可(ke)與(yu)熱(re)(re)電偶(ou)輸入(ru)的(de)毫伏(fu)信(xin)號(hao)(hao)(hao)成線性(xing)，也可(ke)與(yu)熱(re)(re)電偶(ou)溫度(du)計的(de)輸入(ru)溫度(du)信(xin)號(hao)(hao)(hao)成線性(xing)。

2、基本誤差：±0.2%、±0.5%4、傳送方(fang)式：二線制(zhi)

3、變(bian)送(song)器工作(zuo)電(dian)源電(dian)壓***低12V，***高(gao)35V，額定(ding)工作(zuo)電(dian)壓24V。

4、負(fu)(fu)載：極限負(fu)(fu)二(er)載電阻(zu)(zu)按下(xia)式計算RL（max）=50×（Vmm-12） 即(ji)24V時負(fu)(fu)載電阻(zu)(zu)可在0～600Ω范圍內選(xuan)用）額定負(fu)(fu)載250Ω。注：量(liang)(liang)程可調(diao)式變送(song)(song)器，改變量(liang)(liang)程時零點(dian)與(yu)滿度需反復調(diao)試；電偶型變送(song)(song)器在調(diao)試前須預熱30分(fen)鐘。7、環境(jing)溫度影響≤0.05%1℃8、正常工作環境(jing)：a、環境(jing)溫度 -25℃～+80℃b、相對濕度5%～95%c、機械振動f≤55Hz振幅＜0.15mm

 □    型號、類別：

□接線方式：

熱電阻(zu)三線(xian)制(zhi)變(bian)(bian)(bian)送(song)(song)器(qi)(qi)安(an)裝(zhuang)接(jie)線(xian)圖(tu)熱電阻(zu)二絲制(zhi)變(bian)(bian)(bian)送(song)(song)器(qi)(qi)安(an)裝(zhuang)接(jie)線(xian)圖(tu)熱電偶變(bian)(bian)(bian)送(song)(song)器(qi)(qi)安(an)裝(zhuang)接(jie)線(xian)圖(tu)導軌式(shi)變(bian)(bian)(bian)送(song)(song)器(qi)(qi)安(an)裝(zhuang)接(jie)線(xian)圖(tu)一體化液晶顯示變(bian)(bian)(bian)送(song)(song)器(qi)(qi)接(jie)線(xian)圖(tu)

□熱電偶溫度(du)變(bian)送器校驗步驟(zou)

1、校(xiao)驗(yan)時，在(zai)輸入端接入電(dian)位差計，輸出信號(hao)為電(dian)動勢，在(zai)輸出端接上(shang)24VDC穩(wen)壓電(dian)源(yuan)并串(chuan)接上(shang)標準電(dian)流表。

2、調(diao)零：反(fan)接信(xin)號輸入(ru)線，使電(dian)位(wei)差(cha)計輸出校驗現(xian)場室溫對(dui)應電(dian)動勢，調(diao)整電(dian)位(wei)器Z，使電(dian)流表讀數(shu)為4mA。

3、調(diao)滿：正接(jie)信號(hao)輸(shu)入線，使(shi)(shi)電(dian)(dian)位差(cha)計(ji)(ji)輸(shu)出(chu)滿量程對(dui)應(ying)電(dian)(dian)動勢，調(diao)整(zheng)電(dian)(dian)位器S，使(shi)(shi)電(dian)(dian)流表讀(du)數(shu)為(wei)(wei)20mA。（該電(dian)(dian)動勢為(wei)(wei)滿度電(dian)(dian)動勢減(jian)去室溫對(dui)應(ying)電(dian)(dian)動勢后(hou)的(de)值）例：在校驗現場室溫為(wei)(wei)7℃，輸(shu)入信號(hao)為(wei)(wei)K，量程為(wei)(wei)0～1000℃的(de)溫度變(bian)送(song)器標定，通過查(cha)表得知(zhi)7℃對(dui)應(ying)電(dian)(dian)動勢為(wei)(wei)0.277mV，1000℃對(dui)應(ying)電(dian)(dian)動勢這41.269mV,反接(jie)后(hou)，電(dian)(dian)位差(cha)計(ji)(ji)輸(shu)出(chu)0.277mV，調(diao)整(zheng)電(dian)(dian)位器Z，使(shi)(shi)電(dian)(dian)流表讀(du)數(shu)為(wei)(wei)4mA；正接(jie)后(hou)電(dian)(dian)位差(cha)計(ji)(ji)輸(shu)出(chu)讀(du)數(shu)為(wei)(wei)40.992mV（41.269mV～0.277mV），調(diao)整(zheng)電(dian)(dian)位器S，使(shi)(shi)電(dian)(dian)流表讀(du)數(shu)為(wei)(wei)20mA。

□熱(re)電阻溫度變送器校驗步驟

1、標(biao)定時(shi)，按(an)以上典型(xing)接線圖(tu)接線，在輸(shu)入(ru)(ru)端接入(ru)(ru)標(biao)準電(dian)阻(zu)箱（如ZX-25a），在輸(shu)出端接上24VDC穩壓電(dian)源并串接上標(biao)準電(dian)流表。

2、改變信號源發生器（電(dian)(dian)(dian)阻(zu)箱(xiang)），使之等于量(liang)程的下限值(zhi)，調整(zheng)電(dian)(dian)(dian)位器Z，使電(dian)(dian)(dian)流(liu)表的讀(du)數為(wei)4mA，改變信號源，使之等于量(liang)程的上(shang)限值(zhi)，調整(zheng)電(dian)(dian)(dian)位器S，使電(dian)(dian)(dian)流(liu)表的讀(du)數為(wei)20mA即可。例(li)：輸(shu)(shu)(shu)入型號為(wei)Pt100量(liang)程為(wei)0～100℃的溫度變送(song)器。正確接線后(hou)，電(dian)(dian)(dian)阻(zu)箱(xiang)輸(shu)(shu)(shu)出(chu)100Ω，調整(zheng)電(dian)(dian)(dian)位器Z，使電(dian)(dian)(dian)流(liu)表讀(du)數為(wei)4mA；電(dian)(dian)(dian)阻(zu)箱(xiang)輸(shu)(shu)(shu)出(chu)讀(du)數為(wei)138.50Ω(即熱電(dian)(dian)(dian)阻(zu)在100℃時相對應的電(dian)(dian)(dian)阻(zu)值(zhi)），調整(zheng)電(dian)(dian)(dian)位器S，使電(dian)(dian)(dian)流(liu)表的讀(du)數為(wei)20mA。