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                                                                                                                        首頁 > 新聞中心 > 全自動內校分析天平在進行密度測量前的準備工作介紹
                                                                                                                        全自動內校分析天平在進行密度測量前的準備工作介紹
                                                                                                                        發布日期:2022-07-28      瀏覽次數:360
                                                                                                                          實驗室在日常進行物質測量和分析時,經常會使用全自動內校分析天平和密度測試組件進行固體密度的測量。利用該儀器可測量密度大于輔助液體密度的固體,密度小于輔助液體密度的固體,液體密度,多孔材料(如:滲油,軸承材料)的密度。
                                                                                                                         

                                                                                                                         

                                                                                                                          全自動內校分析天平在進行密度測量前,我們需要進行以下這些準備工作:
                                                                                                                         
                                                                                                                          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、測試組件。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。
                                                                                                                         
                                                                                                                          在日常的周期檢定和常規的產品質量檢查中,一般需要檢定天平靈敏度、鑒別力、各載荷點的大允許誤差、天平重復性的檢定、偏載或四角誤差的檢定、配衡功能的檢定。靈敏度一般指分度靈敏度,其在數值上應正好等于該天平相應載荷的檢定分度值。對具有數字指示和自動或半自動校準裝置的儀器,可以免檢靈敏度。當檢定分度值e≥lmg時,可以測定其鑒別力。

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