We have a 7010b TQ and went from perfect tune and operation to the above error after venting to change out a column. What we've done:
Used the previous column
Used no column, just blank ferrule.
Cleaned source.
Checked for continuity between source components and analyzer.
Checked for shorts /continuity between source and heaters and shorts between heaters and anywhere on the body or analyzer
Blew out the chamber and source / analyser with low pressure nitrogen.
Updated firmware
Tried default tunes
Deleted the machine from configuration and added it again.
Checked transfer line and tested for continuity between it and analyzer, source, etc while chamber closed.
I am at a loss. Any input would be very much appreciated.
