Equipment and Calibration History

History for Forerunner-Eosense eosFD FD20180026

Rec No.DateLoc FromTitleLoc ToNotes
6921 2024-10-16 Lab none Calibration Lab none Performance check done. CO2 concentrations were far from ambient and the two chambers were offset:
Average Flux: -0.4, 0.78 STDEV
Average ATM: 639.8ppm, 26.5C
Average Soil: 609.9ppm, 27.1C

Ran a second performance check. CO2 concentrations were still far from ambient but the two chambers were more similar this time.
Average Flux: -0.1, 0.17 STDEV
Average ATM: 741.4ppm, 28.8C
Average Soil: 735.3ppm, 29.2C
6911 2024-10-09 Bouldin Alfalfa Forced Diffusion A Removed Lab none Removed from BA tower and brought back to the lab. The BA field is getting plowed. Joe may use this FD chamber at Tonzi/Vaira.
6292 2023-05-09 Bouldin Corn Forced Diffusion C Moved Bouldin Alfalfa Forced Diffusion A Moved from BC to BA to replace sn FD20160001 which broke. We should have soil CO2 flux data from Whendee's chamber measurements at BC.
6246 2023-03-08 Lab none Installed Bouldin Corn Forced Diffusion C Installed under BC tower to replace sn FD20180067 which got flooded
6198 2023-02-28 Factory none Returned Lab none Received after repair at Eosense: CO2 sensor replaced, relay board replaced, pump replaced, concentration calibration, flux calibration
6199 2022-08-23 Lab none Shipped Factory none Shipped to Eosense on RMA220809 for repair
5444 2021-09-01 Tonzi-SoilCO2 Forced Diffusion Open Removed Lab none Removed from Tonzi-SoilCO2 due to consistent offset between soil and atmosphere chambers. This resulted in small fluxes when they should be pretty much zero. Replaced by sn FD20190027.
5407 2021-08-11 Tonzi-SoilCO2 Forced Diffusion Open Maintenance Tonzi-SoilCO2 Forced Diffusion Open Performance check done. This was a double check of the last check since the CO2 concentrations were so far from ambient. The two chambers were still offset:
Average Flux: 1.3, 0.37 STDEV
Average ATM: 343.7ppm, 41.5C
Average Soil: 408.5ppm, 41.5C
Need to ask Eosense again.
5370 2021-07-13 Tonzi-SoilCO2 Forced Diffusion Open Maintenance Tonzi-SoilCO2 Forced Diffusion Open Performance check done. Referenced to 400ppm. Large offsets need to be double checked:
Average Flux: 0.8, 0.21 STDEV
Average ATM: 107.4ppm, 40.2C
Average Soil: 146.1ppm, 40.3C
4174 2019-11-19 Lab none Installed Tonzi Forced Diffusion Open Installed in the open at the Tonzi soil co2 profiles