Chemstation sequences are supposed to run without stopping until complete. Ever set up a sequence only to find that it mysteriously stopped during the middle of the night or weekend? If so, did you first think to blame the autosampler?
If your Autosampler has run thousands of samples like mine, it might be a little sluggish these days. Here's how to PM your Autosampler system and maybe get another six to twelve months of continued use from it.
Mass Spectrometry is a analytical technique that makes and sorts molecules based on mass. In order to make and move ions, a sufficient vacuum is required. In order to make a good vacuum, GCMS Mass Spectrometers need o-rings.
Most o-rings, once put in place are never disturbed and are good for years but eventually they need to be attended to. Most are easy to get to and are inexpensive and can just be replaced. Such as for the rough pump, diff pump, ion gauge, calibration valve, etc...