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行業動態

如何判斷稱重傳感器的故障問題

文字:[大][中][小] 手機頁面二維碼 2019/3/25     瀏覽次數:    
  任何設備或者工具它在制造出來后,都會有自己的使用年限,這決定人們可以使用多久。但是在使用過程中它也會出現問題,這也會折損使用年限。稱重傳感器若是故障了怎么辦?下面我就說說如何判斷稱重傳感器的故障以及如何維修。

  任何設備或者工具它在制造出來后,都會有自己的使用年限,這決定人們可以使用多久。但是在使用過程中它也會出現問題,這也會折損使用年限。稱重傳感器若是故障了怎么辦?下面我就說說如何判斷稱重傳感器的故障以及如何維修。



1、可能引發零點變化的因素分析

  (1)過載,往往會導致零點突變,輸出電阻明顯超出規定值;

  (2)沖擊,同上;

  (3)受潮或受腐蝕,往往表現為零點的持續變化、不穩等,此時,絕緣電阻會有所降低。

  [檢測方法]保證傳感器無負載、盡可能模擬使用狀況的條件下,按照傳感器的正常接線方式,在輸入端施加5~12V直流電壓,在輸出端使用電壓計測量輸出電壓變化,該變化與輸入電壓之比,折算成mV/V,與標準靈敏度(單位同為mV/V)進行比較,不應超過±1%。

2、可能引發絕緣不良的因素分析

  (1)傳感器電子元氣件受潮,會導致絕緣電阻有所降低;

  (2)傳感器電子元氣件受到化學腐蝕,同上;

  (3)傳感器內部線路、彈性體、屏蔽間出現短路,其阻值往往低于1KΩ。

  [檢測方法]使用50V超絕緣計,分別檢測彈性體(外露金屬部分)、屏蔽線、輸入輸出芯線兩兩之間的電阻大小,其值不應低于5000MΩ。



特別注意的是:

  *千萬不可使用絕緣計表筆測量輸入和輸出電阻;

  *對數字傳感器,不能使用絕緣計進行阻抗測試。

  3、可能引發橋路破壞的因素分析

  (1)傳感器內部電器連線開路或短路;

  (2)器件燒損。

  [檢測方法]使用電阻表,對輸入、輸出電阻進行測量,與出廠檢驗值進行比對,存在明顯的改變,可判斷為該故障。

  4、可能引發沖擊阻值變化的因素分析

  (1)傳感器內部電器連接上出現虛焊;

  (2)應變計或其他粘貼件的膠層遭受破壞。

  [檢測方法]同1、連接方式,使用木錘輕輕敲擊傳感器,要求傳感器的輸出信號不得有不穩定的變化。
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