7 Replies Latest reply on Jan 29, 2018 3:41 AM by thanhlong

    Pressure of inlet lower than setting point - EPC problem?

    thanhlong

      Hi all,

       

      I am using GC 7820 with split/splitless inlet to analyse liquid samples for a while. However, a problem has recently happened when the GC is running or I turn GC on.

       

      - It shutdown when the temperature of oven is high when running.

      or

      - When I turn it on, sometimes the inlet pressure cant reach the setting point or increase slowly. In this case, I reduce the flow rate until the setting point of pressure is the same with actual value. After a while, I increase the flow rate with a small increment. By doing that, the pressure of inlet can reach the setting point of the method and the GC is ready for analysis.

       

      I really don't know what is happening. However, I think that EPC module can fail and the inlet EPC valve does not open. Am I right?

      Regards,

      Long.