2441TH T-stat. shows incorrect temperature, can I calibrate?

[jeff000]

I have a 2441TH thermostat and while I have several questions on it, my main one is can I calibrate it? It shows that it is 66F in my house right now. And I am on the warm side in a t-shirt. And to show how far off it is, the girlfriend is comfortable in a t-shirt at this temp.

But more scientific, my old t stat (running off battery) shows it to be 72, and a stand alone temp thing says it is 73.

 

So at best I would say it is 6 degrees out, 7 at worst.

 

Also can I make this thing show me the temp in C?

 

Also, can I program it from my ISY994?

 

Thanks

[LeeG]

"So at best I would say it is 6 degrees out, 7 at worst."

 

On the Smarthome forum a user found several new thermostats arrived with various calibration offsets already established. Once they were cleared the thermostats were accurate. Calibration is described in the thermostat guide. The user on the Smarthome forum reported he did not press one of the Program buttons long enough so it looked like calibration was not working.

 

"Also can I make this thing show me the temp in C?"

 

The thermostat guide describes how to cycle between C and F. I changed my 2441TH and T2491t1E to C to test something another user posted earlier today.

 

"Also, can I program it from my ISY994?"

 

Things like the thermostat mode and set points can be controlled by the ISY. Calibration and F/C mode cannot be set with the ISY.

[LeeG]

Here is a link to the Smarthome forum topic on calibration

 

http://www.smarthome.com/forum/topic.asp?TOPIC_ID=12274

[jeff000]

Thanks

 

This info wasn't in the printed documentation that came with my t-stat. Didn't even think that the online one would have it.

 

I changed this info (there was a 7 degree offset already that I just had to remove)

 

And after closing out of my isy admin and going back in, it still reports the old temp, and no the new one. And it is still in F.

 

 

With the programming, I mean like set the temp to lower x amount at y time on z day.

[LeeG]

The thermostat must not be reporting the change since from its perspective they are only display changes. That is only speculation. I did a Query when I changed the thermostats to C because the actual ambient temp the t-tstat was measuring had not changed and I did not want to wait for the temp to move. When I did the Query the values in the Admin Console were in C