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                                                                                                                        首頁 > 技術文章 > 分析天平應用過程干燥劑起到什么用途呢?
                                                                                                                        分析天平應用過程干燥劑起到什么用途呢?
                                                                                                                        發布日期:2022-07-27      瀏覽次數:425
                                                                                                                           分析天平采用人性化設計,結構新穎,全透明玻璃風罩,新一代電磁式稱量傳感器,使產品的精度有了可靠保障。帶背光液光顯示屏顯示,使操作者視覺更柔和清晰。設有計件、百分比、單位轉換、穩定度、全量程去皮等多種功能,操作簡便,內置RS接口,可直接連接計算機、打印機等設備。
                                                                                                                          對于天平要保持長期通電,儀器就會自動將機殼內的水分揮發。但幾乎每個企業實驗室的SOP中都有一項規定就是天平的防風罩內要放干燥劑,那么對于這個規定有何見解?到底是放還是不放呢?
                                                                                                                          以前的機械式天平里一般都要求放,但現在的天平室條件好多了,都要求恒溫恒濕了,所以分析天平一般不需要放置干燥劑,而且放置干燥劑可能會產生微弱的氣流,對天平的穩定性有影響。一般在南方,由于氣候潮濕,天平室內都裝有空調和抽濕機,實驗室都有溫度濕度控制的,所以無需放置干燥劑。
                                                                                                                          理論上說,天平室內可不用放干燥劑。它可能會造成天平內外環境差別;更重要的是天平內濕度降低,玻璃器皿稱量時容易產生靜電,無法得到穩定讀數,尤其在冬天環境下。
                                                                                                                          分析天平在使用0.01mg精度時不能放干燥劑,由于干燥劑的存在使天平內的產生微氣流,從而使得天平不能穩定。天平內外濕度不同,空氣比重不同,易引起數據波動。
                                                                                                                          因此總結下放不放不是原則問題,如果環境達不到要求建議放,但稱量時必須取出,還需要勤換。如果嚴格遵守天平的放置條件,*沒有必要放干燥劑,如果太干燥反而會出現靜電。

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