熒(ying)(ying)(ying)光(guang)(guang)(guang)法(fa)溶解氧(yang)儀探頭由光(guang)(guang)(guang)路(lu)系統(tong)、熒(ying)(ying)(ying)光(guang)(guang)(guang)敏感(gan)膜和光(guang)(guang)(guang)學(xue)檢測系統(tong)三部分(fen)組成(cheng),探頭插(cha)入待測介質(zhi)后,介質(zhi)中的氧(yang)立(li)刻(ke)擴散進入有機硅分(fen)子層內并很快達到平衡,將(jiang)調(diao)制藍(lan)光(guang)(guang)(guang)打到熒(ying)(ying)(ying)光(guang)(guang)(guang)層,熒(ying)(ying)(ying)光(guang)(guang)(guang)分(fen)子產生(sheng)(sheng)紅色熒(ying)(ying)(ying)光(guang)(guang)(guang),熒(ying)(ying)(ying)光(guang)(guang)(guang)分(fen)子遇到氧(yang)后被淬滅,熒(ying)(ying)(ying)光(guang)(guang)(guang)強度與(yu)響(xiang)應時(shi)間(jian)隨氧(yang)氣含量(liang)發生(sheng)(sheng)變化。檢測熒(ying)(ying)(ying)光(guang)(guang)(guang)響(xiang)應時(shi)間(jian)變化確定氧(yang)氣含量(liang)。
在線熒光(guang)法溶解(jie)氧儀技(ji)術參數:
(1)測量(liang)范圍:溶解氧:0~25.00mg/L; 溫 度:0~60℃;
(2)測量誤差:溶解氧(yang):± 0.2mg/LF?S;溫 度:±0.5℃
(3)自動溫度補償:0~60℃;
(4)電極(ji)殘余信(xin)號:<1‰;
(5)響應時(shi)間(終值90%):25℃時(shi)<60S;35℃時(shi)<30S;
(6)穩定性:在(zai)常壓恒溫下,每(mei)星期漂移<2%F?S;
(7)信號輸(shu)出:0~10mA(負載電(dian)阻<1.5KΩ);4~20mA(負載電(dian)阻<750Ω);
0~5VDC或0~10VDC(需預定);
(8)兩組繼電器控制(zhi)觸點(dian):3A 240VAC,6A 28VDC或120VAC;
(9)電源(yuan):220VAC±10%,50±1Hz,功率≤3W;
24VDC,功(gong)率≤1W(需(xu)預(yu)定);12VDC,功(gong)率≤1W(需(xu)預(yu)定);
(10)外型尺寸(cun):146*146*120mm;
(11)安裝(zhuang)方式(shi):嵌入(ru)式(shi)表(biao),可選(xuan)配壁掛
(12)開口尺(chi)寸:138*138mm;
(13)儀表重量:0.5kg;
(14)工作環境:
環境溫度:-10~60℃;
相對濕度:不大于90%;
除地球磁(ci)場外周圍無強(qiang)磁(ci)場干擾。
(15)輸(shu)(shu)出(chu)(chu)方式:4-20mA變送輸(shu)(shu)出(chu)(chu)、繼電器(qi)高、低報警(jing)控制輸(shu)(shu)出(chu)(chu)、RS485通信(xin)輸(shu)(shu)出(chu)(chu)(支持ModBus協(xie)議(yi))等(deng)各(ge)種(zhong)變量輸(shu)(shu)出(chu)(chu)。