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壓力校驗儀傳感器組件的檢測步驟

發布日期:2022-07-14 點擊率:28

  壓力校驗儀傳感器有故障時,一般我們不能在現場修理,只有更換。如果我們沒有發現諸如隔離膜片損壞、漏油等現象,則對壓力校驗儀傳感器組件可按下列步驟來檢測:

  1.小心地從插頭座上拔出傳感器組件引出線插座。

  2.檢查內部二極管電路的正、反向偏置:一個回路是紅線與黃線,另一個回路是綠線與藍線。

  現在我們用萬用表正極接紅線,負極接黃線,其串聯回路D1、D2、D5、D6、R4阻值之和應與測綠線與藍線的串聯回路D3、D4、D7、D8、R5的阻值之和接近或相等。

  3.檢查傳感器組件外殼和此四線的電阻,也就是檢查電容極板和接外殼的傳感膜片之間的電阻,其阻值應大于10MΩ。


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