Equipment and Calibration History

History for Apogee SI-121 1281

Rec No.	Date	Loc From	Title	Loc To	Notes
1790	2015-04-20	Factory	Disposed	Disposed	Apogee says: Upon inspection it appears that the thermopile detector has some marks on the FOV glass. This is most likely what is causing the sensors to read so far off from your reference point. I can attempt to calibrate out those marks on the sensor but I am unsure if the uncertainty will be within the 0.1°C specification. The other option is for you to trade in these units for new one’s at a substantial 40% discount, bringing the price to 3 per sensor. We decided to trade the sensor in for a new one.
1791	2015-04-13	Lab none	Shipped	Factory	A laboratory check on the senor showed it reading about 10C low. Sent to Apogee on RMA 21085
1759	2015-03-24	Mayberry Infrared Temperature Vegetation	Removed	Lab none	Removed from the Mayberry tower for use by Ana at Tonzi. This sensor was pointed at the tules.
348	2011-03-01	Lab none	Installed	Mayberry Infrared Temperature Vegetation	Installed on the Mayberry Tule Tower facing a stand of tules.
3810	2010-12-09	Tonzi	Removed	Lab none	Removed from Tonzi with the end of the surface temperature experiment.