The possible correlation with T_Ambient was being discussed in another thread. Eric and Arnaud (?) pointed it out, I argued against jumping to conclusions. Dunno. Jeff
On Thu, Dec 13, 2012 at 11:29 AM, Jed Rothwell <[email protected]>wrote: > I wrote: > > >> http://i50.tinypic.com/2e49mbd.jpg >>> >>> I can't pull up that exact graph, but the fluctuations are similar in >>> the lower P_Xs Low parameter. >>> >> >> Ah, that does look better. The periodicity is maybe a little too regular. >> But better. >> > > If I had to pick a likely instrument artifact, I would guess those > fluctuations are the HVAC cycle. Maybe not; they seem too long for that. > They turn on and increase for 30 to 50 minutes, and then off for about that > long, turning on again as soon as the baseline is reached. That is what a > thermostat does, but 50 minutes is longer than it takes to heat most > buildings. > > Maybe the ambient temperature recording (T_Ambient) can rule out this > possibility. > > I assume those are minutes on the X-scale. > > - Jed > >
