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無線測力計維修注意事項

發布日期:2022-05-30 點擊率:80

  在無線測力計維修工作中,首先應弄懂儀器儀表的基本原理,并掌握有關電子方面的知識和技能,而且應備好所有儀器儀表的說明書、圖紙等技術資料,另外應養成一種良好的工作素質,從而在無線測力計的維修工作中提高效率,減少失誤。

  一、維修時注意事項

  (1)使用邏輯筆、示波器檢測信號時,注意不要無線測力計探針同時接觸兩個測量引腳,因為這種情況的實質是在加電的情況下形成短路。

  (2)用萬用表歐姆擋時,無線測力計切記不要帶電測量。

 ?。?)檢測電源中的濾波電容時,無線測力計應先將電解電容器的正負極短路一下,而且短路時不要用表筆線來代替導線對電容器進行放電,因為這樣容易燒斷芯線。無線測力計可以取一只帶燈頭引線的220V,60~100W的燈,接于電容器的兩端,在放電瞬間燈泡會閃光。

  (4)檢修無線測力計儀表內部電路時,如果安裝元件的接點和電路板上涂了絕緣清漆,測量各點參數時可用普通手縫針焊在萬用表的表筆上,無線測力計以便刺穿漆層直接測量各點,而不用大面積剝離漆層。

  (5)在潮濕環境下檢修儀表故障時,對印刷線路用萬用表測其各點是否通暢很有必要,因為這種情況下的主要故障是銅箔腐蝕。

  (6)檢修時不要盲目亂敲亂碰,無線測力計以免擴大故障,越修越壞。

 ?。?)不要帶電插拔各種控制板和插頭。因為在加電情況下,插拔控制板會產生較強的感應電動勢,這時無線測力計瞬間反擊電壓很高,很容易損壞相應的控制板和插頭。

  (8)無線測力計拆卸、調整儀表時,應記錄原來的位置,以便復原。

 ?。?)修理精密儀器儀表時,如不慎將小零件彈飛,應首先判斷可能飛落的地方,切勿東找一下,西翻一下,無線測力計可采取磁鐵掃描和視線掃描方法進行尋找。

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