I have a 7700 ICP-MS and on startup received the error #1122 Penning Gauge malfunction. I did try to eliminate any dust in the gauge by loosening the vent value to introduce air then restart the vacuum. That did not work so on contacting support it was suggested the most likely culprit would be a bad ion gauge. I have the part on order and am planning to replace it myself. Wondering if anyone has been through the process and if there are any words of advice before I begin. The procedure does not seem to be documented in the hardware manual I received with the instrument.
All the best,