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                                                                                                                        • 分析天平
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                                                                                                                        首頁 > 技術文章 > 使用高精度分析天平前所需要做的準備工作介紹
                                                                                                                        使用高精度分析天平前所需要做的準備工作介紹
                                                                                                                        發布日期:2022-09-05      瀏覽次數:355
                                                                                                                          高精度分析天平通常都不帶像通常電器的電源開關,只需通上電,閃現器上無閃現,儀器也已處在預熱情況了,“ON/OFF”鍵只是閃現器的開關。因而經常運用的天平不需要將電源拔掉,特別是高精度的天平,在條件容許的情況下,長時間不斷電能使其始終保持預熱情況。假設樣品和容器的溫度與稱量室的溫度差在溫差,就會發生稱量的過失,另外手的溫度都會對稱量發生影響,要盡能夠降低人為因素致使的稱量過失,對于具有吸濕性及揮發性的樣品要趕快稱量縮短稱量時間,或將樣品盛放在密閉的容器內進行稱量。
                                                                                                                         
                                                                                                                          在以往的檢定(檢驗)中咱們發現,對高精度分析天平初度進行的稱量檢驗時過失很大,原因是,有些儀器在較長的時間內沒有進行校準,而且很多用戶自以為閃現零位即可直接進行稱量。然而在開機閃現零點時,不代表此天平稱量的數據準確度符合檢驗規范,只代表零位安穩。因而,區分它是不是合格,還要概括考慮其它技術指標的符合性。在寄存時間較長、搬動方位、環境改動、溫度急劇改動等情況下,在運用前都要進行校準操作,才能保證稱量結果的準確性,校準方法通常分為內部校準及外部校準兩種。
                                                                                                                         
                                                                                                                          有的用戶以為在量程規劃內稱量的物體越重對其損害也就越大,這種想法是錯的。通常安全載荷是它所能夠承受的、不致使其計量功用發生改動的靜載荷。因為采用了電磁力自動賠償電路原理,當秤盤加載時(在不超出稱量規劃的前提下),電磁力會將秤盤推回到本來的平衡方位,使電磁力與被稱物體的重力相平衡,只需在容許的稱量規劃內進行稱量,物體質量的巨細對其影響是很小的,不會因長時間稱重而影響它的準確度,原則即是稱量物體是在稱量的規劃以內。

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