7 Replies Latest reply on Jan 8, 2018 9:08 AM by james_jenkins

    TCD Signal change during gas saver


      I have a single inlet / dual TCD 7890B that has a signal change during the gas saver activation.  Attached is a snapshot of the signal change.

      There is no temperature or pressure change during the signal change.

      The signal change occurs on both TCD's simultaneously.

      Notice the signal change occurs at the hold up time.

      Any ideas would be appreciated.



      Column 1 : DB1 30x0.320x3

      Column 2 : DBWax 30x0.320x0.5

      Constant pressure : 13PSI

      Oven: 35C, 5 minute hold

      Split flow: 20:1

      Gas Saver: 1 minute