🚀 go-pugleaf

> DROEGE@fnald.fnal.gov writes:
>
> ...
> temperature range we are operating with the shell servo off and floating.
> A
> curious observation is that we are more sensitive to the outside air
> temperature than to the room temperature.  So while the room temperature is
> relatively constant, the calorimeter "sees" the outside through the dewar,
> 1
> 1/2" of foam, a (now) floating aluminum radiation shield, 1 1/2" foam, 10'
> of
> air, and an R19 house wall or R30 roof.


        Is is possible that your apparatus is not directly "seeing" the
outside temperature, but seeing the effect of cold weather on the power
supply to your house.  Cold outside temperatures will result in greater power
draws by people using electrical heating, and may give altered line voltages
and possibly increased line transients as kilowatt sized units in neighboring
houses switch on and off under thermostatic control.  Is there any part of
the apparatus which is not operated of highly regulated, filtered power?


--
Bruce Dunn    Vancouver, Canada   Bruce_Dunn@mindlink.bc.ca