Most HP/Agilent mass spectrometers have power outlets on the back of the mass spec in order for you to plug your rough pump(s) into.  In this case, the software can accommodate automatic  "Pump Down" and "Vent" procedures.  This is a great idea for a new mass spec, or a new mass spec owner/operator.

A customer recently asked me about installing a UPS (Uninterpretable Power Supply) on his bench-top mass spectrometer system.  Here's how I went about explaining how and why.