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産品概述
技術參數
外觀圖
技術文檔

PTT-300-03 数显溫度变送器

産品概述

PTT-300-03 数显溫度变送器采用热电偶、热电阻作为測溫元件，从測溫元件輸出信号送到变送器模块，经过稳压滤波、运算放大、非线性校正、V/I转换、恒流及反向保护等电路处理后，转换成与溫度成线性关系的4～20mA电流信号0-5V/0-10V电压信号，RS485数字信号輸出。

産品特點

結構精巧、易于安裝；産品精致，多種測溫範圍可選；流體通用，與304/316L兼容的任何介質；多種線性模擬量及數字信號可選；測量反應速度快，精度高；長期穩定性好，低功耗、體積小。帶數顯，可直接查看數據。

應用範圍

廣泛應用于石油、化工、化纖；紡織、橡膠、建材；電力、冶金、醫藥；食品等工業領域現場測溫過程控制；特別適用于計算機測控系統，也可與儀表配套使用。

技術參數

工作電壓	9-30VDC
測溫範圍	-50-100℃
測溫元件	PT100或PT1000
輸出	4-20mA
精度	0.5％FS
耐壓	Max300Bar
探頭尺寸	6mm和8mm可選
环境溫度	-40-85℃
響應時間	T=50℃ 2.3S，T=50℃ 5.4S
電氣保護	過壓和反極性保護
長期穩定性（12個月）	±0.1％FS
储存溫度	-40-125℃ ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
材質	不鏽鋼
觸液部分	不鏽鋼
防護等級	IP65
電氣接口	帶現場赫斯曼數顯
螺紋接口	（G1/4）可定制
認證	CE ROHS ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

外觀圖

技術文檔

PDF数显溫度变送器产品文档下載
PDF数显溫度变送器说明文档下載

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"'TOP-SIDE GALAH! I gave a sort of assent--attended with nausea--and turned to my saddle, but he clung. "Why, how can he hang around that way, Smith, and he a suitor who's just killed her husband? Of course, now, he'd ought to know he can't ever be one henceforth. I'm sorry for him, but--" It occurred to the Doctor that here was an opportunity to investigate certain matters. Of course, there was always the chance of coming on the track obliquely. None knew better than Prout how frequently one crime interlocked with another, and how often in looking for one particular criminal another had been arrested. "That I leave you to guess," Bruce replied. "It is beyond me." "It--it proves nothing," she said with an effort, presently. "A pleasant face. Don't you think that she is a little like me?" And there was no avenue of escape whatever. She was alone with this man in a dark, deserted house. She had come there for a few needed trifles that she had left behind. Nobody had seen either of them enter. Why, it was a very premium upon murder and the lust for revenge! "4. Armand Fléchet, senator. As might be expected, the Parmenidean paradoxes provoked a considerable amount of contradiction and ridicule. The Reids and Beatties of that time drew sundry absurd consequences from the new doctrine, and offered them as a sufficient refutation of its truth. Zeno, a young friend and20 favourite of Parmenides, took up arms in his master’s defence, and sought to prove with brilliant dialectical ability that consequences still more absurd might be deduced from the opposite belief. He originated a series of famous puzzles respecting the infinite divisibility of matter and the possibility of motion, subsequently employed as a disproof of all certainty by the Sophists and Sceptics, and occasionally made to serve as arguments on behalf of agnosticism by writers of our own time. Stated generally, they may be reduced to two. A whole composed of parts and divisible ad infinitum must be either infinitely great or infinitely little; infinitely great if its parts have magnitude, infinitely little if they have not. A moving body can never come to the end of a given line, for it must first traverse half the line, then half the remainder, and so on for ever. Aristotle thought that the difficulty about motion could be solved by taking the infinite divisibility of time into account; and Coleridge, according to his custom, repeated the explanation without acknowledgment. But Zeno would have refused to admit that any infinite series could come to an end, whether it was composed of successive or of co-existent parts. So long as the abstractions of our understanding are treated as separate entities, these and similar puzzles will continue to exercise the ingenuity of metaphysicians. Our present business, however, is not to solve Zeno’s difficulties, but to show how they illustrate a leading characteristic of Greek thought, its tendency to perpetual analysis, a tendency not limited to the philosophy of the Greeks, but pervading the whole of their literature and even of their art. Homer carefully distinguishes the successive steps of every action, and leads up to every catastrophe by a series of finely graduated transitions. Like Zeno, again, he pursues a system of dichotomy, passing rapidly over the first half of his subject, and relaxes the speed of his narrative by going into ever-closer detail until the consummation is reached. Such a poem as the ‘Achilleis’ of modern critics21 would have been perfectly intolerable to a Greek, from the too rapid and uniform march of its action. Herodotus proceeds after a precisely similar fashion, advancing from a broad and free treatment of history to elaborate minuteness of detail. So, too, a Greek temple divides itself into parts so distinct, yet so closely connected, that the eye, after separating, as easily recombines them into a whole. The evolution of Greek music tells the same tale of progressive subdivision, which is also illustrated by the passage from long speeches to single lines, and from these again to half lines in the dialogue of a Greek drama. No other people could have created mathematical demonstration, for no other would have had skill and patience enough to discover the successive identities interposed between and connecting the sides of an equation. The dialectic of Socrates and Plato, the somewhat wearisome distinctions of Aristotle, and, last of all, the fine-spun series of triads inserted by Proclus between the superessential One and the fleeting world of sense,—were all products of the same fundamental tendency, alternately most fruitful and most barren in its results. It may be objected that Zeno, so far from obeying this tendency, followed a diametrically opposite principle, that of absolutely unbroken continuity. True; but the ‘Eleatic Palamedes’ fought his adversaries with a weapon wrested out of their own hands; rejecting analysis as a law of real existence, he continued to employ it as a logical artifice with greater subtlety than had ever yet been displayed in pure speculation.18 VI. VII. “Where’s the sack of sand?” "Si Klegg, go off and mind your own business, and let me attend to mine," yelled Shorty, struggling to free himself from his partner's iron grasp. "Am I goin' to be run over by every pin-feather snipe from West Point? I'll break him in two." Norma shook her head at the reflection. "I'm sorry." "Burn him down!—Burn him down!—the hemmed murderer!" He was just going to turn back into the room, his limbs aching pleasantly for the sheets, when he noticed a faint glow in the sky to southward. At first he thought it was a shred of sunset still burning, then realised it was too far south for June—also it seemed to flicker in the wind. Then suddenly it spread itself into a fan, and cast up a shower of sparks. There was a wicket in the northern gate, the common outlet for the domestics, which, as Holgrave had anticipated, the servitor had not closed after him. He entered, and stood within the court-yard; he heard the sound of voices, and the tread of feet, but no human being was near: he paused an instant to consider, and then, with the swiftness of a deer, he sprung towards the stables, and entered the one appropriated to the select stud of the baron. A lamp was burning, but the men who attended on the horses were now away, quaffing ale to the long life of the heir. The baroness's favourite palfrey was lying in a stall; he stept across the animal, and, after pressing his hands on various parts of the wall, a concealed door flew open, and a dark aperture was before him. He stooped and passed through, and ascended a long, winding flight of steps, till a door impeded his progress; he opened it, and stood in a closet hung round with dresses and mantles, and displaying all the graceful trifles of a lady's wardrobe. There was a door opposite the one at which he had entered, which led into the baroness's chamber, where there were lighted candles, and a blazing fire on the hearth. The floor was thickly strewn with rushes, and he could just perceive the high back of a chair, with the arms of the family wrought in the centre; he paused and listened; he heard the faint cry of a babe, and discovered, by the language of the nurse, that she was feeding it; then there was the hush-a-by, and the rocking motion of the attendant. In a few minutes, the sound of a foot on the rushes, and "the lovely babe would sleep," now announced to Holgrave that the child was deposited with its mother: then he heard the curtains of the bed drawn, and the nurse whisper some one to retire, as her ladyship was inclined to sleep; there was another step across the rushes, and a door was softly closed, and then for a few minutes an unbroken silence, which the nurse at length interrupted by muttering something about "whether the good father had come yet." Again there was a tread across the rushes, and the door again was gently closed; and Holgrave, after a moment of intense listening, stepped from the closet, and entered the chamber. In an elevated alcove stood the bed of the baroness; the rich crimson hangings festooned with gold cord, the drapery tastefully fringed with gold, even to the summit, which was surmounted by a splendid coronet. Holgrave, unaccustomed to magnificence, was for a moment awed by the splendid furniture of the apartment—but it was only for a moment—and then the native strength of his soul spurned the gaudy trappings; he stepped lightly across the spacious chamber; he unloosed the rich curtains—the heir of De Boteler was reposing in a deep slumber on a downy pillow; beyond him lay the exhausted mother, her eyes closed, and the noble contour of her face presenting the repose of death. For an instant, Holgrave paused: remorse for the deed that he was about to do sent a sudden glow across his care-worn face—but had not the baron destroyed his offspring? whispered the tempting spirit. He raised the babe from the pillows without disturbing its slumber—he drew the curtains, and—he reached the stable in safety, closed the secret door, and arrived at the postern, which was still unfastened, passed through, and gained his own door without impediment. HoME 激情大香蕉久久一本道尹人网 ENTER NUMBET 0015autolexy.com.cn
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