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溶解氧分析仪传感器常見故障及处理方法

发表时间：2019-01-09 09:17

1.靈敏度下降

①表面現象：響應速度減慢，測量誤差增大

産生原因：透氣膜表面被汙染

處理方法：清洗（更換）透氣膜。

② 表面现象：响应速度减慢，测量误差增大

産生原因：陰極（金電極）表面被汙染

? ? ? ? ? ? ? ? 阳极（银电极）表面严重氧化

處理方法：用超細金相砂紙打磨陰（陽）極表面；或用稀氨水清洗陽極表面

③表面現象：響應速度減慢，測量誤差增大

産生原因：透氣膜破損；透氣膜未貼緊陰極（有氣泡）；電解液被稀釋

處理方法：更換透氣膜；重貼透氣膜；更換電解液

2.示值不穩定

①表面現象：示值隨樣品流量的大小波動

産生原因：樣品流量太小（在複膜表面形成濃度梯度，使膜表面濃度小于樣品實際濃度）

處理方法：增大樣品流量（zui好與標定時的流量一致）

② 表面现象：示值随样品温度的大小波动

産生原因：溫度補償元件（負溫度系數熱敏電阻）損壞或接觸不良

處理方法：更換溫度補償元件；消除接觸不良

3.示值（本底氧）明顯偏大

表面現象：長時間沖洗測量，示值（本底氧）明顯偏大（有時高達200μg/L~300μg/L）

産生原因：陰極（金電極）與複膜間有間隙（間隙內充滿了較厚的電解液）

處理方法：清洗陰極表面，重貼透氣膜

上一篇如何清洗毛細管粘度計？

下一篇影響油品體積電阻率的因素？

文章分類：常見故障

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DANGEROUS PLACE ON THE SUWO NADA. DANGEROUS PLACE ON THE SUWO NADA. "Richard, it helps the wrong way; I know that story. After hearing that story she is, yes! the one woman of all women to send me this." Another day arose. A courier brought passes for our three or four other wounded to go home as soon as they were fit to travel, and by night they were all gone. At early bedtime came two surgeons of high rank all the way from Johnston's army up in Mississippi. General Austin had asked this favor by telegraph. Harry had been gone thirty-six hours, and Ferry was just asking if he had not yet got back, when the surgeons came in to the room. A pleasantry or two consumed a few moments. Then the surgeon in charge of us told of a symptom or two, to which they responded only "hmm," and began the examination. Miss Harper sent her three nieces away. I lay and listened in the busy stillness. Presently one of the examiners murmured with a certain positiveness to the other, who after a moment's silence replied with conviction; Miss Harper touched our surgeon's arm inquiringly and he looked back in a glad way and nodded. Miss Harper nodded to me; they had located the ball! Now the conversation turned upon men and events of the day, while one of the visitors, with his back to the patient, opened a case of glittering knives. Presently the professional heads came so close together as quite to hide the patient; they spoke once or twice in a manly soothing tone. Miss Harper stroked my temples to keep me down, one of the busy ones spoke again, and lo! the thing was done, there was the ball in the basin. As the men of blood sped through their kind after-work the news flew to and fro; Camille wept,--since she could not hurrah,--Cécile told Charlotte, the heavenly-minded Estelle was confirmed in her faith, Miss Harper's black eyes, after a brief overflow, were keener and kindlier than ever, and as the surgeons spoke the word "done," Ferry asked again if Harry had not got back yet. Pretty soon Harry did arrive, with news of great feats by our cavalry against our old enemy Grierson, in which Austin's brigade had covered themselves with glory, and in which he had had his own share; his hand was swelled as big as his heart. In all the Confederacy no houseful went to sleep that night in sweeter content. I sank into perfect bliss planning a double wedding. "Well, I can name several! I don't call Scott Gholson anybody, but there's Major Harper--No, I'm not talking too loud, Ned isn't hearing a word. Major Harper's so hot against this thing that he brought it up, with me, yesterday on the battlefield." Mrs. Flack held the greater part of herself in a semicircle of red arm. "You are a one," she declared. Then she looked at Mr. Flack, who sat unmoved. "Why don't you laugh. It would do you good. You take everything so serious." "Certainly, captain." The final defeat of polytheism proved, in some respects, an advantage to Neo-Platonism, by compelling it to exchange theological controversy for studies which could be prosecuted, at least for a time, without giving umbrage to the dominant religion. At Alexandria the new spiritualism was associated, on genuinely Platonic principles, with the teaching of geometry by the noble and ill-fated Hypatia. In all the Neo-Platonic schools, whether at Rome, at Alexandria, at Constantinople, or at Athens, the writings of Plato and Aristotle were attentively studied, and made the subject of numerous commentaries, many of which are still extant. This return to the two great masters of idealism was, as we have already said, the most valuable result of the metaphysical revival, and probably contributed more than any other cause to the preservation of their works amidst the general wreck of ancient philosophical literature. Finally, efforts were made to present the doctrine of Plotinus under a more popular or a more scientific form, and to develope it into systematic completeness. [Pg 50] Beyond the "deadening" came a horde of pursuing rebels, firing and yelling like demons. The sight and sound swelled the boys' hearts with the rage of battle. "Why, what in the world have I got on that's military?" asked Billings, looking himself over. "Stephen, you were not used to answer me thus. I charge you, by the authority and love of thy mother, and in the name of the blessed saints, to tell me what has happened." HoME 飞鹰伦理影院ENTER NUMBET 004fupai2.com.cn
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