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avatar: flo
flo
2 posts
Replied to flo's post on March 24th, 2016

Thanks to the posts and infos in 5975C Series GC/MSD Q&A I was able to fix the problem with our Agilent G6100 series Quadrupole (G6110A). Hope I can take revenge by giving the following solution:

Our problem was that the MS status LED turned from blinking orange to red exactly 30 sec after Power on (shortly after hearing a valve moving). High vacuum had shown unrealistic pressure of about 10^-9 to 10^-10 torr.

Agilent offered a replacement of Micro-Ion Gauge (G1960-80303) and AC PCA with Gauge Controller incl. service for about 4000€.

Micro-Ion Gauge (G1960-80303) is a coustom made Granville-Phillips® 355 Micro-Ion® Hot-cathode Bayard-Alpert Ionization Vacuum Gauge (belonging to MKS INSTRUMENTS). Instead of two filaments as given in the mks 355 manual it has only one filament and a shoring bar with the other pin.

The mks service was very helpful and said that there is no repair / filament replacement for 355 gauges and suggested to purchase a new one. To place an order at mks the Agilent Part No. G1960-80303 can be used and resulted in a part price of  less than 300€ (1/3 compared to Agilent).
The replacement can be done easily on the right side of instrument after removing RFPA Box by just removing the two exterior screws. The gauge is fixed with three screws and has a large o-ring that can be reused.

For additional Info: the rough vaccum gauge in G6100 series is a 275 Convectron® Pirani Vacuum Gauge, if you get problems with that part.

avatar: Paul_
Paul_
1 posts
Replied to flo's post on April 16th, 2018

Hi Flo

I was wondering if you can let me know what pressure reading you're seeing now after changing the gauge in your vacuum status for both the rough and turbo pumps. I am having the same issue as you (MS status LED turned from blinking orange to red exactly 30 sec after Power on).

Appreciate your help on this. Thank you!

avatar: Dan Ste.Marie
Dan Ste.Marie
421 posts
Replied to flo's post on April 16th, 2018
Paul, Your high cacuum should be in the range if 10-5 to 10-6. Dan