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                                                                                                                        首頁 > 技術文章 > 簡述0.1mg密度天平進行密度測量前的準備工作
                                                                                                                        簡述0.1mg密度天平進行密度測量前的準備工作
                                                                                                                        發布日期:2022-11-11      瀏覽次數:124
                                                                                                                           0.1mg密度天平采用高精度稱重系統和嚴密的測定程序,使得密度直接顯示在顯示屏上。從而大大減少了人工換算的繁瑣性和人為誤差。其操作簡單,直接,清晰,明了。滿足各工業應用及科研部門密度測定的要求。
                                                                                                                         

                                                                                                                         

                                                                                                                          0.1mg密度天平進行密度測量前的準備工作:
                                                                                                                         
                                                                                                                          1、需根據對測量的密度數據精度的具體要求選擇精度,根據被測樣品的體積,重量選擇容量。在進行測試前需要對準備好的儀器進行足夠長時間的預熱,并進行必要的校正以保證測量數據的準確。
                                                                                                                         
                                                                                                                          2、密度組件。需選擇合適的測試組件,如對某些體積較大,稱量室無法放置的物質需選擇下掛式測試組件。
                                                                                                                         
                                                                                                                          3、待測樣品??紤]到水的表面張力的影響,為了測量密度的準確性,建議測量的樣品重量須大于1g。為了提高測量準確度,建議選擇形狀規則,表面粗糙度小的樣品。
                                                                                                                         
                                                                                                                          4、選擇合適的輔助液體。一般可選擇為:水、酒精、其他。選擇測試輔助液體時需根據具體的測試樣品的性質進行選擇,如易于與水發生反應的,可選擇酒精作為輔助輔助液體。
                                                                                                                         
                                                                                                                          重復性檢定應在空載和加載狀態下進行,加載的載荷有兩種:一種是全載,一種是半載。要求檢定中分別對加載和空載的平衡位置進行讀數并記錄,同時注意每加一次載荷均應返零一次。要求對同一載荷多次衡量結果之間的差值,不得超過其在該載荷時的大允許誤差的絕對值。對于新購置的儀器應檢查其配衡功能,一般選取兩個載荷點,即:(13)Max,(23)Max。在相同載荷下所得兩結果之間的差值,不得超過該載荷時的大允許誤差的絕對值。
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