GC Agilent 7890B-TCD -PDHID-FID

I have proposed system from agilent 7890B to check high purity gases  . system consists of TCD , PDHID and FID . me question is do you think that system is complicated and i have risk that if any fault happened the whole system will be down . How to guard PDHID from dirty gases how to take care of that detector.

 

Please see attached DRAWING

Parents
  • Hello,

     

    Unfortunately Agilent can't have a third detector when a PDHID is present, so it is not a valid configuration.

     

    For the PDHID, UHP helium is required, and additional a main getter and mini getters are used for additional helium clean up.  Getters remove all impurities with the exception of argon.

     

    Typically with complex system like this we would use a channel partner.

     

    Kelly

Reply
  • Hello,

     

    Unfortunately Agilent can't have a third detector when a PDHID is present, so it is not a valid configuration.

     

    For the PDHID, UHP helium is required, and additional a main getter and mini getters are used for additional helium clean up.  Getters remove all impurities with the exception of argon.

     

    Typically with complex system like this we would use a channel partner.

     

    Kelly

Children
  • Thanks kelly

     

    Why PDHID is not valid with third detector in 7890B and what is the suitable second detector with Pdhid?

     

    What do you mean by partner channel?

     

    As I know from Agilent agent that this system configurated with three detector each detector in separate channel even I can change carrier gas of one channel with same carrier of other channels I.e. Tcd with argon and PDHID and FID with helium .

     

    Please confirm that if system has separate channel it will be valid

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