OT750 氧氣變送器

激光測量技術
       OT750氧氣變送器的測量探頭采用結構緊湊的管道二極管激光（TDL）氣體分光計,。這種光測量技術以優(yōu)異的穩(wěn)定性與高靈敏性而著稱,。OT750*次在如此緊湊的探頭中采用了適合行業(yè)使用的TDL 技術。

       TDL 的原理是測量激光束在樣氣中的衰減,，調整氧分子的波長到某一特定值來感應激光中的氧氣,。因此，測量到的衰減量就只針對通過光束的氧氣含量的衰減,。

OT750     技術參數(shù)

測量范圍                                                                                             0 .. *氧氣
準確度                                                                                                      ±0.2%氧氣
  （包括噪音，線性和重復性）
                                                                                                    溫度漂移 ±2％讀數(shù)
                                                                                                 穩(wěn)定性 ±1％讀數(shù) / 年
                                                                                             零點漂移 ±0.1％氧氣/年
測量的反應時間                                                                                                   3 秒
靜止空氣中的擴散反應時間                                                                        T63 / T90
           不帶過濾器                                                                                    10 秒/20 秒
           不銹鋼網過濾器                                                                             10 秒/25 秒
           不銹鋼網和PTFE 過濾器                                                               30 秒/70 秒
不帶壓力補償?shù)膲毫ζ?br>           0.8 … 1.2 bar                                                                                     -2%讀數(shù)
           1.2 … 1.4 bar                                                                                     -5%讀數(shù)
壓力補償準確度                                                                                       ±0.25%讀數(shù)
二氧化碳和水氣背景氣體的影響（無補償）
          濃度低于6%二氧化碳                                                                         <1％讀數(shù)
          露點低于30oC 的氣體                                                                         <1%讀數(shù)
背景氣體補償準確度
          0 … 50%濃度二氧化碳                                                                    ±0.5%讀數(shù)
          0 … 300g/m3水含量 (Td=80oC)                                                          ±1%讀數(shù)

OT750    操作環(huán)境

工作溫度范圍
探頭（在線安裝）                                                                                 -20 … +80oC
電子元件（外殼）                                                                                -40 … +60 oC
變送器（環(huán)境氣體測量）                                                                     -20 … + 60oC
儲存溫度范圍                                                                                        -55 … +80oC
工作壓力范圍                                                                                        0.8 … 1.4bar
探頭壓力范圍                                                                                     zui高到至10bar

符合標準
電磁兼容 IEC(EN)-61326 標準,，測量,、控制和實驗室使用的電子設備。
EN50104 標準,，檢測氧氣電子儀器的性能要求和測試方法,。
EN50271 標準，檢測易燃氣體,、有毒氣體和氧氣的電子儀器,。
激光安全 Class 3R 激光產品

OT750    輸入和輸出

輸入范圍                                                                                                 11… 36VDC
功耗zui大                                                                                                  6W典型 3W
模擬輸出                                                                                                  0/4… 20mA
zui大負載                                                                                                             500?
數(shù)字輸出                                                                            （2 線，非隔離） RS-485
報警/控制繼電器                                                                                  30VAC/60VDC

OT750      機械部件

外殼材料                                                                               G-ALSi10MG(DIN1725)
探頭材料                                                                                                       AISI 316
外殼防護等級                                                                                                      IP66
外殼重量                                                                                                            2.2kg
安裝法蘭直徑                                                                                                   97mm
能與標準法蘭配套
zui小尺寸為                                                  DIN(2527B）DN50 和ANSI（150）2.5"
電纜襯套                                                                                                    M20 x 1.5
不銹鋼網過濾器                                                                                開口直徑310μm
觸濕材料
AISI316,EPDM或Kalrez（可選）,，
PTFE（可選）,，SiN,MgF2