Equipment and Calibration History

History for Vaisala GMT221 F4960018

Rec No.DateLoc FromTitleLoc ToNotes
2937 2017-07-12 Twitchell Alfalfa Removed Lab none Removed from Twitchell Alfalfa because it was reading 0. It was in set A, 8 cm (the second depth).
2167 2016-02-11 Lab none Installed Twitchell Alfalfa Installed at Alfalfa Profile A at 8cm. The existing probe sn Y0710013 was removed due to low readings.
1881 2015-06-09 Twitchell Alfalfa Removed Lab none Removed from Set B at -8cm with upgrade of soil CO2 system
1871 2014-09-08 Lab none Installed Twitchell Alfalfa Installed in Alfalfa Set B -8cm to replace sn K1340006
1528 2014-08-27 Twitchell Alfalfa Removed Lab none Removed from profile B at 8cm due to reading zero. Replaced by sn K1340006.
1865 2014-08-13 Lab none Installed Twitchell Alfalfa Installed near the radiometers at Alfalfa in Set B to the north at -8cm
1244 2014-01-29 Lab none Installed Sherman Island Reinstalled after lab calibration Set B at -8cm
1428 2014-01-27 Lab none Calibration Lab none Trueppm = Probeppm*0.9972 + -319.4; linear relationship between the ppm reported by the probe and the known ppm of the calibration tanks. Tanks: zero air (0ppm), 3056ppm, and 10000ppm. Ta=22.7C, P=102.1kPa. Because the lab conditions were close to factory conditions, no temperature or pressure corrections were applied. Done by: Patty.
2084 2014-01-23 Sherman Island Location Sherman Island Sherman Profile B -8cm
1395 2011-12-13 Lab none Calibration Lab none Trueppm = Probeppm*1.039 + 10.06; linear relationship between the ppm reported by the probe and the known ppm of the calibration tanks. Tanks: zero air (0ppm), 406ppm, 2238ppm, and 10000ppm (N2 bal). Ta=24.6C, P=101.7kPa. Because the lab conditions were close to factory conditions, no temperature or pressure corrections were applied. Done by: Sara.
1388 2011-10-06 Lab none Calibration Lab none Trueppm = Probeppm*1.028 + 1.298; linear relationship between the ppm reported by the probe and the known ppm of the calibration tanks. Tanks: zero air (0ppm), 406ppm, 2238ppm, and 10000ppm (N2 bal). Ta=26.2C, P=101.4kPa. Because the lab conditions were close to factory conditions, no temperature or pressure corrections were applied. Done by: Sara.
1383 2011-03-14 Lab none Calibration Lab none Trueppm = Probeppm*1.062 + 47.47; linear relationship between the ppm reported by the probe and the known ppm of the calibration tanks. Tanks: zero air (0ppm), 597ppm, 2238ppm, and 10000ppm (N2 bal). Ta=25.3C, P=102.5kPa. Because the lab conditions were close to factory conditions, no temperature or pressure corrections were applied. Done by: Melanie.