Problem in GC-450

[arfeen66]

Dear All,
We are using Varian(now bruker) GC-450for Natural gas analysis, there is a prblem in air pressure(EFC11) which is stable at start of test but gradually decrease & results in turned off Flame of FID. i have checked the Leakage but did't find any leakage. please help me to sort out the problem.

[Peter Apps]

It sounds as if the air supply to the instrument is inadequate - check the pressure at the cylinder, and make sure that the supply line is not obstructed, and that there are not excessive volumes being taken off elsewhere.

Peter

[arfeen66]

other GC of same brand using the common supply of air shows no problem(300ml/min)

[Peter Apps]

other GC of same brand using the common supply of air shows no problem(300ml/min)

Probably a faulty EPC then, time for a service call.

Peter

[arfeen66]

thanks sir for your promt reply