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  1. winterfire

    Vacuum breaker- How to check

    Our tanks wee protected by PSVs. The set pressures are +0.065mBar for the pressure and -0.004 mbar. What we have is only a hand pump. Is it possible to check it with our hand pump?
  2. winterfire

    ground problem

    we are using siemens plc and siemens industrial pc. the power supply for the plc, industrial pc and all inputs and outputs is 24vdc. when one cable of either input or output is grounded, the indication in the pc for transmitters will go on maximum thereby activating alarms and trips but the...
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