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壓差變送器的總體維護是一共分為幾部分

更新時間：2021-10-18 點擊次數(shù)：1720

　　差壓變送器根據(jù)被測介質的壓力不同分為壓力變送器，絕對壓力變送器，微差壓變送器，低、中、高差壓變送器，高靜壓變送器等，它把差壓信號編程標準電信號(4-20mA)遠傳，可進行壓力、流量、液位的測量。那么在使用過程中，我們要如何運行維護呢?

　　日常與定期維護

　　◆每周進行一次衛(wèi)生清掃，保持變送器及其附件的清潔;

　　◆每周檢查一次取壓管路及閥門接頭處有無滲漏現(xiàn)象，如有滲漏現(xiàn)象應盡快處理。

　　◆每月檢查變送器零部件完整無缺，無嚴重銹蝕、損壞;銘牌、標識清晰無誤;緊固件不得松動，接插件接觸良好，端子接線牢固;

　　◆每月檢查一次現(xiàn)場測量線路，包括輸入、輸出回路是否完好，線路有無斷開、短路情況，絕緣是否可靠等;

　　◆每月檢查儀表零點和顯示值的準確性，變送器零點和顯示值準確、真實;按變送器校準周期定期進行校準;

　　◆對變送器定期進行排污、排凝或放空，對取源管線或測量元件有隔離液的變送器定期灌隔離液;

　　◆對易堵介質的導壓管定期進行吹掃;

　　◆長期停用變送器時，應關閉一次門;

　　◆變送器在運行時，其殼體必須良好接地。用于保護系統(tǒng)的變送器，應有預防斷電、短路、或輸出開路的措施;

　　◆在冬季節(jié)應檢查儀表取源管線保溫伴熱良好，以免取源管線或變送器測。

　　制定詳實的排污計劃,定期排污

　　排污主要是針對差壓變送器、壓力變送器，由于測量介質含有粉塵、油垢、微小顆粒等在導壓管內(nèi)沉積(或在取壓閥內(nèi)沉積)，直接或間接影響測量。排污周期可由儀表工根據(jù)實踐自行制定計劃。

　　◆排污前，必須和工藝人員聯(lián)系，了解具體情況;

　　◆流量或壓力調節(jié)系統(tǒng)排污前，應先將自動切換到手動，保證調節(jié)閥的開度不變;

　　◆對于差壓變送器，排污前先將三閥組正負取壓閥關死;

　　◆排污閥下放置容器，慢慢打開正負導壓管排污閥，使物料和污物進入容器，防止物料直接排入地溝，否則，一來污染環(huán)境，二來造成浪費;

　　◆由于閥門質量差，排污閥門開關幾次以后會出現(xiàn)關不死的問題，應急措施是加盲板，保證排污閥處于不泄漏，以免影響測量精確度;

　　◆開啟三閥組正負取壓閥，擰松差壓變送器本體上排污(排氣)螺絲進行排污，排污完成擰緊螺絲;

　　◆觀察現(xiàn)場指示儀表，直至輸出正常，若是調節(jié)系統(tǒng)，將手動切換與自動。

上一篇：二氧化碳傳感器都可以應用在哪些領域里？

下一篇：能夠影響氣體流量計的因素有哪些

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