Isolated PT180 while removing 2.75"CFF-NW40 adapter and installing turbo pump in its place.  Helium leak tested new joint and also the turbo vent valve.  Leaving the turbo isolated and under rough vacuum.  Decoupled fore line from turbo exhaust isolation valve.  Wrapped hardware in Aluminum foil but didn't have the preferred assortment of heat tape lengths to complete the job before maintenance time expired ;  Will still need 1 hour notice before baking can begin as the fore line will need to be connected and the correct length heat tapes still need to be added.

Why bake PT180 hardware?

PT180, PT170 and PT140 are new-to-us Inficon BPG402 Bayard-Alpert wide range gauges that we installed this past spring.  As mentioned by others in previous entries, these three have a positive slope over time which is not reflected in our older cold-cathode gauges which sample the same vacuum volume(s) but at different locations,  Degassing of the new gauge's filaments haven't helped.  The theory now is that this gauge behavior is the result of "wet" components used in the gauges assemblies [(2) new uhv valves, (1) new 1 1/2" CFF Tee and (1) new BPG402 gauge.  

Attached is the graph showing the pressure accumulation, we hope to repeat this accumulation following the bake for comparison: