failing BFB_Atune

[Button_Pusher]

Hello,
I have a Agilent 5977E and I'm using the Extraction Ion source. I have always had trouble with the bfbautotune function passing. Its always something different, such as bas axis, algorithym, ion lens connection, calibrant level, ect. It will pass an Autotune every single time as well as the Etune(for extraction source). This has been the case since new. A service call when new brought the service person who replaced the multiplier and filaments (Wow!). After a short time it began failing again, so I cleaned the already clean source and still the problem persisted so I reluctantly took the source apart and reassembled and bang it began passing the bfbautotune again. Anyway again Im failing BFB autotune, you'ld think it wouldnt pass a BFB acquisition with this failed tune but it will.

I tried putting the Etune into my acquisition methods and I was amazed at the great baseline and sensitivity that it has, amazing performance. The problem is I cant pass a BFB acquisition with this tune, Its so close but the 50 mass is too low. Ive tried everything imagineable to get this 50 mass to increase in relation to the other masses with no luck. If I put the (failed) BFBatune in, it passes no problem but the sensitivety is nowhere near what I get with the Etune. The etune sets emv at 1035, 69 abund is always above 390000, airwater is .2%. Id prefer to use the etune for all my analysis but I cant figure out how to increase the 50 mass. Ive tried the wizard ratio but it seems to not "take", dynamic seems to bounce the masses around, it wont finish a tune with the 502 replaced with the 50, what the heck am I doing wrong?

Any comments or thoughts would be greatly appreciated!!! Thanks a ton for any and all input!!

[Steve Reimer]

Which method are you trying to run?

[Button_Pusher]

524.2

[James_Ball]

I am using a 7000QQQ with the extraction source and finally got it to pass a BFB tune check. The 7000 doesn't have the bfb autotune so I had to work from the etune and manually adjust to get 50 higher.

Run the etune, then set the masses to 69, 100, 50 and manually ramp the lenses and try to adjust 100 lower and 50 higher relative to each other. Since the tune check looks for 95 versus 50, you have to work with the 100 present in the tune gas.

The only dynamic parameter used is the Entrance Lens and if I need a small tweak I adjust the 69 an 100 voltages there and can usually bring 50 up relative if needed.

[Button_Pusher]

Thanks very much James! I am going to try it, thanks again!

[rwolff1]

Button_Pusher did you ever get this problem resolved?