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基于熱導(dǎo)原理的在線式氫氣分析儀，長期穩(wěn)定應(yīng)用于鋼鐵、冶金行業(yè)，化學(xué)工業(yè)以及其他需要分析氫氣濃度的領(lǐng)域。該系統(tǒng)反應(yīng)速度快，低于2秒鐘，并且能保持反應(yīng)速度的穩(wěn)定。分析系統(tǒng)具有多種版本可選，有機柜式、現(xiàn)場安裝的機箱系統(tǒng)，以及具有1區(qū)和2區(qū)EX防爆等級的成套系統(tǒng)提供。可多量程同時測量并自動切換。
據(jù)顯示, 信號輸入和輸出
| 用戶界面 | LCD 顯示 40 字x 16 行 + 圖條 狀態(tài)文字顯示和狀態(tài)輸出 語言:英語/德語 |
| 信號輸出 | 2個可設(shè)定的獨立電隔離輸出: RLoad = 600Ω max. 輸出值: 0-20 mA, 4-20mA, 4-20mA (依據(jù)NAMUR NE43) 和 測試信號值(0mA, 4mA, 10mA, 12mA & 20 mA) |
| 數(shù)字輸出 (儀器狀態(tài)) | 觸電輸出儀器狀態(tài) (28V max.; 350mA max.) : 故障 | 維護(hù)需求 | 維護(hù) |
| 模擬輸入(optional) | 3 電隔離輸入 0 – 20mA 或 4 – 20mA (Ri = 50Ω) |
| 數(shù)字 I/O 2 (optional) | 數(shù)字輸入: 8 數(shù)字輸入 (6 – 24VDC; 10mA max.) • 遙控量程切換 • 外部校準(zhǔn) •切換第二個量程的干擾補償 • 用戶定義的輸入到數(shù)字輸出 數(shù)字輸出: 7數(shù)字輸出 (浮動觸點 28V max.; 350mA max.) • 報警值 (每量程一個報警值) |
Analytical-/ Operational Data
| Measuring principle | Difference in thermal conductivity (?λ) of various gases |
| Measured quantity | Concentration of a particular gas component in binary and quasi-binary mixtures. In many applications involving multi-component gases the inherent non-selectivity of the thermal conductivity principle can be minimized using interference correction techniques. Physical interference reduction is sometimes possible with certain applications due to the wide temperature range of the CONTHOS' TC-detector. |
| Measuring ranges | Up to 3 independently configurable, switchable ranges. The reference response of each range is factory linearized (4th-degree polynomial). Suppressed output ranges within the corresponding reference range can be easily configured. Range switching is accomplished manually, automatically and/or externally (via optional digital inputs). lowest range: 0 - 0.5% H2 in N2 or 99.5-99% H2 in N2 (or equivalent ?λ) largest range: 0 - 99% H2 |
| Response time τ90 | approx. 2 sec. (dependent upon gas flow and analyzer configuration) (integration time configurable) |
| Precision | ≤ 0.5% F.S.O. (typically better than ± 0.2% F.S.O.) |
| Accuracy | better than ± 0.5% F.S.O. (typically better than ± 0.3% F.S.O.) |
| Calibration | Manual: 2-point (offset/span) calibration Option: automatic or semi-automatic calibration in conjunction with the optional digital I/O-board or RS-485 |
| Interference correction | 3 correction channels for static and/or dynamic interference correction (dynamic correc tion only in conjunction with the optional analog inputs or RS-485) One of the prerequisites for dynamic interference correction is the availability of a selective signal, proportional to the particular gas component to be corrected for. The processing of analyzer ranges with a suppressed zero range is not possible. |
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