數顯壓力開關的顯示故障處理
數顯壓力開關的基礎工作需要接入電源，并有輸入信號和輸出信號，因此當發現顯示有異�，F象時，應按如下方法處理。
當給數顯壓力開關送電無顯示時，首先應檢查開關的供電電源是否異常，如正常但是開關仍無顯示時，則可斷定開關內部的電源或相關電子元器件損壞；
當開關顯示有溢出或亂跳現象時，可測量其輸入信號是否有開路或接觸不良現象，如果測得開路，則可斷定故障發生在開關之外，查出信號開路處,排除后即可正常；
當輸出信號仍為零時，可用萬用表測量儀表后部端子輸出信號,正常時應為4-20mA直接，如果沒有則說明儀表本身有問題,如果有，而回路電流仍無指示時,可斷定故障發生在儀表之外,即配套的電源可能有問題。
西安仕樂克控制器制造有限公司 (www.a3025.cn)
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