I a currently working on a 7890B/5977A with turbo pump.
I try to run a SIM/SCAN method with 3 Groups SIM
time 0-6 : 64-96 - dwell : 100
time 6-19 : 43-55-70 - dwell : 100
time 19-22 : 43-67-68 - dwell : 100
When running the SIM/Scan method, only the first SIM group was collected. But looking at the screen of the acquisition software, each of the three group seems to be collected according to the method.
After the run, the SIM signal contain only the first group for all the run time
If we run only the SIM method with 3 SIM group - > all works and the three SIM windows were found into the SIM signal.
What we have done
- resend the firmware to GC and MS
- starting from a new method
-change the MS Mother Board
- change the network board
- change the sideboard PCA
The same 3-group SIM method works without any problem on an other GC/MS with the same configuration.
the software version is MassHunter for acquisition : B.07.00 and data analysis F01.00
Thank you for your help