Equipment and Calibration History

History for Vaisala GMP221 K1340006

Rec No.	Date	Loc From	Title	Loc To	Notes
6029	2022-10-05	Tonzi-SoilCO2 CO2 Probe Open Profile -0.08	Removed	Lab none	The soil co2 gradient system has not been in good condition for a long time. Finally getting around to removing the equipment from the field: Open -8cm
3056	2017-09-14	Lab none	Installed	Tonzi CO2 Probe Open Profile -0.08	Installed at Tonzi in the Open profile at -8cm after lab calibration. This is a new installation with new holes dug.
3011	2017-08-25	Tonzi CO2 Probe Open Profile -0.08	Removed	Lab none	Removed from Tonzi Open profile at -8 cm position for calibration
2190	2016-02-23	Lab none	Installed	Tonzi CO2 Probe Open Profile -0.08	Installed in the Tonzi Open profile at -8cm after lab calibration.
1870	2014-09-08	Twitchell Alfalfa	Removed	Lab none	Removed from Alfalfa Set B -8cm because of low readings. Replaced by F4960018
1529	2014-08-27	Lab none	Installed	Twitchell Alfalfa	Installed in profile B at 8cm to replace sn F4960018 due to zero reading.
2093	2014-06-17	Sherman Island	Removed	Sherman Island	Removed from Sherman profile A at -16cm due to low readings. Replaced by sn G0150037
2092	2014-04-10	Lab none	Installed	Sherman Island	Installed in Sherman profile A at -16cm to replace sn G0150035
1453	2014-04-08	Lab none	Calibration	Lab none	Trueppm = Probeppm*1.002 + -37.28; linear relationship between the ppm reported by the probe and the known ppm of the calibration tanks. Tanks: zero air (0ppm), 2238ppm, 3056ppm, and 10000ppm. Ta=25.1C, P=101.5kPa. Because the lab conditions were close to factory conditions, no temperature or pressure corrections were applied. Done by: Joe.