Hi,
After performing my annual cleaning on the QE and calibrated, it as passes the positive cal but when performing the basic (negative) Analyzer accuracy it has failed for Mass resolution dependency 'too high @ R17K'.
I have made a new cal-mix, optimize the probe position, increased flow rate from the syringe, new Hesi needle, currently trying to optimize gas flows to see if that will help.
Has anyone seen this before/ do you know what I can do to resolve this?
There are a few steps you can take to try and resolve this issue:
1. Check the source and make sure that it is properly aligned and that the lens voltage is correct.
2. Check the vacuum system, inspect the vacuum chamber and the turbomolecular pump to ensure they are functioning properly.
3. Check any electronic instrumentation aboard the mass spectrometer and make sure that the settings are correct.
4. Check the filament and replace if necessary.
5. Check the mass resolving power at various resolutions and make sure that the settings are as expected.
6. If all else does not work, contact the manufacturer for further assistance.
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