溫壓補償能避免出現新的誤差?
溫壓補償能避免出現新的誤差?
(本文由專業銷售記錄儀記錄紙記錄筆的綠圖控儀器儀表有限公司提供)
溫壓補償能避免出現新的誤差?
采用溫壓補償時都要用到壓力變送器,這時應考慮:大氣壓及液柱壓力的影響,以免出現新的誤差,分述如下:溫壓補償能避免出現新的誤差?大氣壓力引起的誤差,由于溫壓補償的經驗公式中,都包含有蒸汽**壓力這一參數,而一般做法是用壓力變送器,把檢測出來的蒸汽表壓力加上當地大氣壓來表示**壓力,因此在建立數學模型時,應根據當地的大氣壓來計算,不能不加區別采用近似等于0.1Mpa來代替大氣壓,尤其是海拔較高的地區及所測蒸汽壓力較低時,更應引起注意。如果選用**壓力變送器則不會產生上述影響。溫壓補償能避免出現新的誤差?
液柱靜壓力引起的誤差,由于各種壓力變送器的取壓口與變送器本體大多不可能處于同一高度,因此冷凝水的靜壓力對變送器的輸出會造成影響,而產生附加誤差。取壓口與變送器的垂直距離越大則影響越大,這一影響對普通壓力變送器,**壓力變送器都存在影響。這時采取零點遷移和加修正值的方法來調整壓力變送器,以消除影響。 溫壓補償能避免出現新的誤差?
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