Specifications

Analyzer 7
5975 Series MSD Troubleshooting and Maintenance Manual 205
Filament care
Like the filaments in incandescent light bulbs, the ion source filaments will
eventually burn out. Certain practices will reduce the chance of early failure:
• If you have an optional G3397A Micro-Ion vacuum gauge, use it to verify
that the system has an adequate vacuum before turning on the analyzer,
especially after any maintenance was performed.
• If you are controlling your MSD from the Edit Parameters screen, always
select MSOff before changing any of the filament parameters.
• When setting up data acquisition parameters, set the solvent delay so that
the analyzer will not turn on while the solvent peak is eluting.
• When the software prompts Override solvent delay? at the beginning of a
run, always select NO.
• Higher emission current will reduce filament life.
• Higher electron energy will reduce filament life.
• Leaving the filament on for short times (1 minute) during data acquisition
will reduce filament life.