MIT.nano staff have started posting daily humidity values as comments on the TRL coater as of August 1. Paul McGrath has also been sending out more detailed data-logger results via email that help highlight recent fluctuations. Paul compared the logger against the Fab-12 humidity readers, which helped identify the need for facilities to recalibrate some of the building 39 sensors.
We also identified some control inconsistencies, and are working with department of facilities to look into them next week.
A bit of background
The current TRL photo room was (“long ago”) converted to be a photo space to help ease congestion in the original TRL photo room. At that time, the air handling systems were much newer, and requirements not as stringent. Over the years, that changed. Further variations are created because the TRL air flow comes up from the third floor around the outside of the gale housing. Windows and wooden frames may leak a little, so that humidity in TRL is slightly influenced by outside air humidity even in the case of air handlers working perfectly. All of these reasons contributed to why MIT.nano was built!