Equipment and Calibration

View History

Equipment Entry

Instrument: Infrared Temperature Manufacture: Apogee Model No: SI-121 Serial No: 1965 Tag No: NULL Acquisition Date: 2015-04-22 Project: Ameriflux Location on 2024-06-04: Tonzi, NULL Notes: Replacing old SA-121 sensor that was traded in. Narrow field of view 18deg half-angle, 0.6sec response time, analog outs. Coefficients: mC2 = 1.08768e5 mC1 = 1.05487e7 mC0 = 1.82939e9 bC2 = 2.63346e3 bC1 = 1.75985e5 bC2 = -4.94396e6

Documents

Calibration: cal_Apogee_SI-121_1965.pdf

History

Rec No.	Date	Loc From	Title	Loc To	Notes
6879	2024-06-04	Lab none	Installed	Tonzi Infrared Temperature Grass A	Reinstalled at the little tree northeast of the Tower at Tonzi after having been removed to repair massive cable damage from cows. This sensor is pointed at the grass.
6692	2024-04-30	Lab none	Repair	Lab none	I spliced this cable back together where the cow chewed it. The end has a completion resister for the thermistor half bridge. A quick test in the lab window shows it matches the other IRT within 0.5C - as good as you get without a fancier setup.
6683	2024-04-22	Tonzi Infrared Temperature Tree Crown	Removed	Lab none	Removed from the IRT tripod because cows had chewed the wires off.
1806	2015-05-06	Lab none	Installed	Tonzi Infrared Temperature Tree Crown	Installed at Tonzi to the east just north of the road. This sensor is point down on top of a small tree.