Fail to ignite but high FID base line and fail to detect the ignition failure

Question

I work on 7890 B GC system . Our machine is failed to ignite but has a high FID base line. And the machine failed to detect the ignition failure. Thanks for any help to fix this problem.

CMZainea · Answer

Hello KBMP , 
 
 What is the value for the baseline? Usually when it's in the 500l-600k pA, it could be a problem with the reassembly of the system after you changed the jet for example. Something in the collector assembly might short out the signal. 
 You can remove the collector assembly to see if the signal goes to 0. If it does, reassemble and see if it stays at 0. 
 If after reassembly you still have a high signal it could be a problem with the collector assembly itself. 
 
 Now, if you remove the collector assembly and the signal is still high, that is an electronic problem and you would need to reach out to your local Agilent Team .

CMZainea · Answer

Hello KBMP , 
 
 It could be a number of things, impossible to say without having more details. Please follow the article below to troubleshoot ignition failures: 
 
 Troubleshooting an FID not Igniting - Articles - GC Portal - Agilent Community