Equipment and Calibration
Equipment history at Gilbert Tract| ALL | | Anemometer || Barometer || Battery Bank || Camera || CH4 Probe || CO2 Probe || Conductivity Sensor || Data Logger || DO Sensor || Flowmeter || Fluorometer || Gas Analyzer || Heat Flux Plate || Infrared Temperature || Interface || Multiplexer || Narrow Band || Net Radiometer || PAR Sensor || pH ORP || Precipitation || Range Finder || RH & Temp || Solar Controller || Solar Panel || Water Level || Weather Station || Wiper |
SELECT a.recno, a.eh_date, a.eh_loc1, a.eh_loc2, IF(a.eh_loc2=:loc, a.eh_locref2, a.eh_locref1) AS ref, a.eh_locref2, a.eh_title, a.eh_notes, a.eh_id, b.serialno, b.equip, b.modelno FROM equiphist a INNER JOIN equiplist b ON a.eh_id=b.recno WHERE (a.eh_loc1=:loc1 OR a.eh_loc2=:loc2) AND b.equip=:eq ORDER BY b.serialno, a.eh_date
| Date | Serial No. | Model | Action | Ref | Notes |
|---|---|---|---|---|---|
| Gas Analyzer | |||||
| 2021-09-02 | 0041 | LI-7500A | Moved | Interface LI-7550 | Moved from SW to GT with the decomissioning of SW and the beginning of GT |
| 2021-09-21 | 0041 | LI-7500A | Calibration | Lab | Last calibration: 2021-05-25 AGC=98 SDM= DAC1= DAC2= Ambient P=100.3kPa, Tair=26.6C, Tdew=11.3C Zero Air at 1700psi, AMP CA04119 524.77 at 1700 Tdewspan=20.00 CO2 zero 0.9966 -> .9667 Offset: .29ppm CO2 span 1.0137 -> 1.0145 Offset: -.44ppm H2O zero 0.8206 -> .8224 Offset: 10.9ppm H2O span 1.0266 -> 1.0228 Offset: .09ppm Notes: Calibrated zero and CO2 span on 9/20. There was an issue with the dew point generator where it was producing a dewpoint ~16C when the temp switch was set to 20.00C. I calibrated the H2O span the next day on 9/21. We fixed the problem by adding more water in the condenser block on the back of the machine. The water level looked ok while the cap was on and the machine was running, but once I turned the machine off and took the cap off, the water level dropped to below the "Min" line. After I added water and turned it back on, the dewpoint generator got to a reasonable dewpoint and it seemed stable. |
| 2021-09-15 | 0041 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 0065. |
| 2021-09-21 | 0041 | LI-7500A | Calibration | Lab | Last calibration: 2021-05-25 AGC=98 SDM= DAC1= DAC2= Ambient P=100.3kPa, Tair=26.6C, Tdew=11.3C Zero Air at 1700psi, AMP CA04119 524.77 at 1700 Tdewspan=20.00 CO2 zero 0.9966 -> .9667 Offset: .29ppm CO2 span 1.0137 -> 1.0145 Offset: -.44ppm H2O zero 0.8206 -> .8224 Offset: 10.9ppm H2O span 1.0266 -> 1.0228 Offset: .09ppm Notes: Calibrated zero and CO2 span on 9/20. There was an issue with the dew point generator where it was producing a dewpoint ~16C when the temp switch was set to 20.00C. I calibrated the H2O span the next day on 9/21. We fixed the problem by adding more water in the condenser block on the back of the machine. The water level looked ok while the cap was on and the machine was running, but once I turned the machine off and took the cap off, the water level dropped to below the "Min" line. After I added water and turned it back on, the dewpoint generator got to a reasonable dewpoint and it seemed stable. |
| 2022-01-02 | 0041 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 0065 for calibration. |
| 2022-03-30 | 0041 | LI-7500A | Calibration | Lab | Last calibration: 2021-12-16 AGC=100.2 SDM= DAC1= DAC2= Ambient P=100.8kPa, Tair=20.9C, Tdew=8.9C Zero Air at 850psi, AMP CA04119 524.77 at 1600 Tdewspan=20.00 CO2 zero 0.996 -> .9969 Offset: 2.92ppm CO2 span 1.0172 -> 1.0189 Offset: 1.16ppm H2O zero 0.8227 -> .8214 Offset: -7.4ppm H2O span 1.0335 -> 1.0337 Offset: -.02ppm Notes: H2O span took about 40-50 minutes to stabilize. Dewpoint temp had a range of ~0.2C when setting the H2O span point. |
| 2022-03-23 | 0041 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2182. |
| 2022-03-30 | 0041 | LI-7500A | Calibration | Lab | Last calibration: 2021-12-16 AGC=100.2 SDM= DAC1= DAC2= Ambient P=100.8kPa, Tair=20.9C, Tdew=8.9C Zero Air at 850psi, AMP CA04119 524.77 at 1600 Tdewspan=20.00 CO2 zero 0.996 -> .9969 Offset: 2.92ppm CO2 span 1.0172 -> 1.0189 Offset: 1.16ppm H2O zero 0.8227 -> .8214 Offset: -7.4ppm H2O span 1.0335 -> 1.0337 Offset: -.02ppm Notes: H2O span took about 40-50 minutes to stabilize. Dewpoint temp had a range of ~0.2C when setting the H2O span point. |
| 2021-09-15 | 0065 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 0041 for calibration. |
| 2022-01-11 | 0065 | LI-7500A | Calibration | Lab | Last calibration: 2021-09-08 AGC=101.6 SDM= DAC1= DAC2= Ambient P=101.7kPa, Tair=28.1C, Tdew=7.9C Zero Air at 1000psi, AMP CA04119 524.77 at 1675 Tdewspan=20.00 CO2 zero 0.8911 -> .8912 Offset: .48ppm CO2 span 1.0211 -> 1.0205 Offset: .53ppm H2O zero 0.7313 -> .7314 Offset: .8ppm H2O span 1.0143 -> 1.0259 Offset: -.27ppm Notes: |
| 2021-10-21 | 0065 | LI-7500A | Adjusted | Gas Analyzer CO2/H2O | Reset signal strength from 108 to 100 |
| 2022-01-11 | 0065 | LI-7500A | Calibration | Lab | Last calibration: 2021-09-08 AGC=101.6 SDM= DAC1= DAC2= Ambient P=101.7kPa, Tair=28.1C, Tdew=7.9C Zero Air at 1000psi, AMP CA04119 524.77 at 1675 Tdewspan=20.00 CO2 zero 0.8911 -> .8912 Offset: .48ppm CO2 span 1.0211 -> 1.0205 Offset: .53ppm H2O zero 0.7313 -> .7314 Offset: .8ppm H2O span 1.0143 -> 1.0259 Offset: -.27ppm Notes: |
| 2022-01-02 | 0065 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 0041. |
| 2022-01-11 | 0065 | LI-7500A | Calibration | Lab | Last calibration: 2021-09-08 AGC=101.6 SDM= DAC1= DAC2= Ambient P=101.7kPa, Tair=28.1C, Tdew=7.9C Zero Air at 1000psi, AMP CA04119 524.77 at 1675 Tdewspan=20.00 CO2 zero 0.8911 -> .8912 Offset: .48ppm CO2 span 1.0211 -> 1.0205 Offset: .53ppm H2O zero 0.7313 -> .7314 Offset: .8ppm H2O span 1.0143 -> 1.0259 Offset: -.27ppm Notes: |
| 2023-04-11 | 0065 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 75H-2667 for calibration. |
| 2023-09-18 | 0065 | LI-7500A | Calibration | Lab | Last calibration: 2023-04-10 AGC=101.1 SDM=0 DAC1=- DAC2=- AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.6kPa, Tair=22.4C, Tdew=14.9C Zero Air at 1750psi, AMP CA04119 524.77 at 1800 Tdewspan=16.0 CO2 zero 0.8918 -> 0.8919 Offset: 0.2ppm CO2 span 1.0217 -> 1.0240 Offset: -1.47ppm H2O zero 0.7295 -> 0.7322 Offset: 21.1ppm H2O span 1.0128 -> 1.0226 Offset: -0.2ppm Notes: After calibration I painted some dings with white nail polish. |
| 2023-08-08 | 0065 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2669. |
| 2023-09-18 | 0065 | LI-7500A | Calibration | Lab | Last calibration: 2023-04-10 AGC=101.1 SDM=0 DAC1=- DAC2=- AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.6kPa, Tair=22.4C, Tdew=14.9C Zero Air at 1750psi, AMP CA04119 524.77 at 1800 Tdewspan=16.0 CO2 zero 0.8918 -> 0.8919 Offset: 0.2ppm CO2 span 1.0217 -> 1.0240 Offset: -1.47ppm H2O zero 0.7295 -> 0.7322 Offset: 21.1ppm H2O span 1.0128 -> 1.0226 Offset: -0.2ppm Notes: After calibration I painted some dings with white nail polish. |
| 2024-02-12 | 0418 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 75H-2176 for calibration. |
| 2024-06-17 | 0418 | LI-7500A | Calibration | Lab | Last calibration: 2024-02-09 AGC=100.0 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.0kPa, Tair=19.2C, Tdew=9.51C Zero Air at 1800psi, AMP CA04119 524.77 at 400 Tdewspan=16.0 CO2 zero 0.9075 -> 0.9064 Offset: -4.76ppm CO2 span 1.0063 -> 1.0047 Offset: 1.03ppm H2O zero 0.9317 -> 0.9346 Offset: 15.6ppm H2O span 1.002 -> 1.0084 Offset: -0.13ppm Notes: Reset SS from 102.9. Slightly larger then usual zero offsets |
| 2024-05-07 | 0418 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2514. |
| 2024-06-17 | 0418 | LI-7500A | Calibration | Lab | Last calibration: 2024-02-09 AGC=100.0 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.0kPa, Tair=19.2C, Tdew=9.51C Zero Air at 1800psi, AMP CA04119 524.77 at 400 Tdewspan=16.0 CO2 zero 0.9075 -> 0.9064 Offset: -4.76ppm CO2 span 1.0063 -> 1.0047 Offset: 1.03ppm H2O zero 0.9317 -> 0.9346 Offset: 15.6ppm H2O span 1.002 -> 1.0084 Offset: -0.13ppm Notes: Reset SS from 102.9. Slightly larger then usual zero offsets |
| 2023-11-06 | 75H-2176 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 75H-2669 for calibration. |
| 2024-03-23 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2023-11-03 AGC=102.1 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.1kPa, Tair=25.05C, Tdew=10.57C Zero Air at 300psi, AMP CA04119 524.77 at 550 Tdewspan=20.00 CO2 zero 0.8678 -> .8682 Offset: 1.94ppm CO2 span 1.0116 -> 1.0079 Offset: 2.58ppm H2O zero 0.8552 -> .8494 Offset: -33.2ppm H2O span .9231 -> .9236 Offset: -.01ppm Notes: Larger H2O zero offset than usual |
| 2024-02-12 | 75H-2176 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 0418. |
| 2024-03-23 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2023-11-03 AGC=102.1 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.1kPa, Tair=25.05C, Tdew=10.57C Zero Air at 300psi, AMP CA04119 524.77 at 550 Tdewspan=20.00 CO2 zero 0.8678 -> .8682 Offset: 1.94ppm CO2 span 1.0116 -> 1.0079 Offset: 2.58ppm H2O zero 0.8552 -> .8494 Offset: -33.2ppm H2O span .9231 -> .9236 Offset: -.01ppm Notes: Larger H2O zero offset than usual |
| 2024-07-22 | 75H-2176 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 75H-2514 for calibration. |
| 2024-10-29 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2024-07-21 AGC=102.7 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.4kPa, Tair=24.6C, Tdew=6.22C Zero Air at 975psi, AMP FB04319 514.07 at 450 Tdewspan=20.00 CO2 zero 0.8676 -> .8681 Offset: 2.22ppm CO2 span 1.0116 -> 1.0094 Offset: 1.54ppm H2O zero 0.8573 -> .8559 Offset: -8.1ppm H2O span 0.9357 -> .9250 Offset: .26ppm Notes: |
| 2024-10-23 | 75H-2176 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2514. |
| 2024-10-29 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2024-07-21 AGC=102.7 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.4kPa, Tair=24.6C, Tdew=6.22C Zero Air at 975psi, AMP FB04319 514.07 at 450 Tdewspan=20.00 CO2 zero 0.8676 -> .8681 Offset: 2.22ppm CO2 span 1.0116 -> 1.0094 Offset: 1.54ppm H2O zero 0.8573 -> .8559 Offset: -8.1ppm H2O span 0.9357 -> .9250 Offset: .26ppm Notes: |
| 2025-01-15 | 75H-2180 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 75H-2514 for calibration. |
| 2022-03-23 | 75H-2182 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 0041 for calibration. |
| 2023-02-09 | 75H-2182 | LI-7500A | Calibration | Lab | Last calibration: 2022-03-22 AGC= SDM= DAC1= DAC2= Ambient P=kPa, Tair=C, Tdew=C at psi, 750 at Tdewspan=12.00 CO2 zero 0.8849 -> .8849 Offset: ppm CO2 span 1.0222 -> 1.0030 Offset: ppm H2O zero 0.8483 -> .8262 Offset: ppm H2O span 1.0312 -> 1.0144 Offset: ppm Notes: Calibrated at Licor after repair. Source lens, chopper motor, and source were replaced. |
| 2022-08-16 | 75H-2182 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from GT because it was reading **.** and brought back to the lab for further testing. |
| 2023-02-09 | 75H-2182 | LI-7500A | Calibration | Lab | Last calibration: 2022-03-22 AGC= SDM= DAC1= DAC2= Ambient P=kPa, Tair=C, Tdew=C at psi, 750 at Tdewspan=12.00 CO2 zero 0.8849 -> .8849 Offset: ppm CO2 span 1.0222 -> 1.0030 Offset: ppm H2O zero 0.8483 -> .8262 Offset: ppm H2O span 1.0312 -> 1.0144 Offset: ppm Notes: Calibrated at Licor after repair. Source lens, chopper motor, and source were replaced. |
| 2022-08-18 | 75H-2418 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed on the GT tower to replace the one that failed a few days ago and was removed. |
| 2023-01-19 | 75H-2418 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2667. |
| 2024-05-07 | 75H-2514 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 0418 for calibration. |
| 2024-07-22 | 75H-2514 | LI-7500A | Calibration | Lab | Last calibration: 2024-05-06 AGC=97.8 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=99.79kPa, Tair=22.1C, Tdew=13.18C Zero Air at 1650psi, AMP CA04119 524.77 at 350 Tdewspan=20.00 CO2 zero 0.91 -> .9086 Offset: -5.85ppm CO2 span 1.0009 -> .9880 Offset: 9.33ppm H2O zero 0.846 -> .8457 Offset: -2.0ppm H2O span 0.9936 -> .9823 Offset: .26ppm Notes: Larger CO2 zero (-5.85ppm offset) and CO2 span (9.33ppm offset) than expected. Checked CO2 span again after calibrating everything else and it read 524.52ppm (offset=-0.25ppm). That looks ok so I left the calibration as is. |
| 2024-07-22 | 75H-2514 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2176. |
| 2024-10-22 | 75H-2514 | LI-7500A | Calibration | Lab | Last calibration: 2024-07-23 AGC=99.9 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.6kPa, Tair=25.4C, Tdew=11.9C Zero Air at 1100psi, AMP FB04319 514.07 at 850 Tdewspan=20.00 CO2 zero 0.9086 -> .9089 Offset: .9ppm CO2 span 0.988 -> .9962 Offset: -5.71ppm H2O zero 0.8457 -> .8476 Offset: 12.5ppm H2O span 0.9823 -> .9936 Offset: -.26ppm Notes: |
| 2024-10-23 | 75H-2514 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 75H-2176 for calibration. |
| 2025-01-28 | 75H-2514 | LI-7500A | Calibration | Lab | Last calibration: 2024-10-22 AGC=99.0 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.8kPa, Tair=21.1C, Tdew=6.72C Zero Air at 800psi, AMP FB04319 514.07 at 300 Tdewspan=16.00 CO2 zero 0.9089 -> .9083 Offset: -2.75ppm CO2 span 0.9962 -> .9983 Offset: -1.45ppm H2O zero 0.8476 -> .8498 Offset: 15.4ppm H2O span 0.9936 -> .97 Offset: .53ppm Notes: Set dew point generator to 20.00C initially which led to a dew point reading of ~20.5C, seemed like a big offset. I thought the set point was too close to the room temp (then at 23.4C), so I reset the generator to 16.00C. While it stabilized, I saved the config file w/ CO2 zero/span and H2O zero only and started calibrating the zero for the next 7500A in the queue. After coming back to this sensor and reloading the partial config file, the H2O dew point was still ~0.5C above the set point of 16.00C so I decided the H2O span was just that far off. |
| 2025-01-15 | 75H-2514 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2180. |
| 2025-01-28 | 75H-2514 | LI-7500A | Calibration | Lab | Last calibration: 2024-10-22 AGC=99.0 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.8kPa, Tair=21.1C, Tdew=6.72C Zero Air at 800psi, AMP FB04319 514.07 at 300 Tdewspan=16.00 CO2 zero 0.9089 -> .9083 Offset: -2.75ppm CO2 span 0.9962 -> .9983 Offset: -1.45ppm H2O zero 0.8476 -> .8498 Offset: 15.4ppm H2O span 0.9936 -> .97 Offset: .53ppm Notes: Set dew point generator to 20.00C initially which led to a dew point reading of ~20.5C, seemed like a big offset. I thought the set point was too close to the room temp (then at 23.4C), so I reset the generator to 16.00C. While it stabilized, I saved the config file w/ CO2 zero/span and H2O zero only and started calibrating the zero for the next 7500A in the queue. After coming back to this sensor and reloading the partial config file, the H2O dew point was still ~0.5C above the set point of 16.00C so I decided the H2O span was just that far off. |
| 2023-01-19 | 75H-2667 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 75H-2418 for calibration. |
| 2023-04-13 | 75H-2667 | LI-7500A | Calibration | Lab | Last calibration: 2023-01-13 AGC=101 SDM=0 DAC1=- DAC2=- Ambient P=100.2kPa, Tair=23.1C, Tdew=-1.99C Zero Air at 1200psi, AMP CA04119 524.77 at 1150 Tdewspan=16.0 CO2 zero 0.9418 -> 0.9417 Offset: -0.2ppm CO2 span 1.0233 -> 1.0213 Offset: 1.43ppm H2O zero 0.8421 -> 0.8141 Offset: -4.1ppm H2O span 1.0314 -> 1.0317 Offset: 0.0ppm Notes: |
| 2023-04-11 | 75H-2667 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 0065. |
| 2023-04-13 | 75H-2667 | LI-7500A | Calibration | Lab | Last calibration: 2023-01-13 AGC=101 SDM=0 DAC1=- DAC2=- Ambient P=100.2kPa, Tair=23.1C, Tdew=-1.99C Zero Air at 1200psi, AMP CA04119 524.77 at 1150 Tdewspan=16.0 CO2 zero 0.9418 -> 0.9417 Offset: -0.2ppm CO2 span 1.0233 -> 1.0213 Offset: 1.43ppm H2O zero 0.8421 -> 0.8141 Offset: -4.1ppm H2O span 1.0314 -> 1.0317 Offset: 0.0ppm Notes: |
| 2023-08-08 | 75H-2669 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 0065 for calibration. |
| 2023-12-20 | 75H-2669 | LI-7500A | Calibration | Lab | Last calibration: 2023-08-04 AGC=100.0 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=99.6kPa, Tair=22.4C, Tdew=15.48C Zero Air at 550psi, AMP CA04119 524.77 at 750 Tdewspan=18.0 CO2 zero 0.9195 -> 0.9187 Offset: -3.0ppm CO2 span 1.0167 -> 1.0167 Offset: -0.02ppm H2O zero 0.9009 -> 0.9027 Offset: 10.9ppm H2O span 1.0163 -> 1.0206 Offset: -0.09ppm Notes: Reset SS from 102.6 |
| 2023-11-06 | 75H-2669 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2176. |
| 2023-12-20 | 75H-2669 | LI-7500A | Calibration | Lab | Last calibration: 2023-08-04 AGC=100.0 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=99.6kPa, Tair=22.4C, Tdew=15.48C Zero Air at 550psi, AMP CA04119 524.77 at 750 Tdewspan=18.0 CO2 zero 0.9195 -> 0.9187 Offset: -3.0ppm CO2 span 1.0167 -> 1.0167 Offset: -0.02ppm H2O zero 0.9009 -> 0.9027 Offset: 10.9ppm H2O span 1.0163 -> 1.0206 Offset: -0.09ppm Notes: Reset SS from 102.6 |
| 2023-08-08 | TG1-0223 | LI-7700 | Installed | Gas Analyzer CH4 | Installed at Gilbert Tract to replace sn TG1-0424 for calibration. |
| 2024-01-11 | TG1-0223 | LI-7700 | Calibration | Calibration Location: Gilbert Tract Last calibration: 2023-08-07 RSSI=82%, Optical RH=3% Ambient P=101.8kPa, Tair=9.7C Zero Air at 1850psi, AMP CA03923 3.3865 at 1750 CH4 Zero Offset: .002ppm CH4 Span Offset: -.0225ppm Notes: Breezy | |
| 2024-08-07 | TG1-0223 | LI-7700 | Calibration | Calibration Location: Gilbert Tract Last calibration: 2024-01-11 RSSI=85%, Optical RH=7% Ambient P=100.5kPa, Tair=30.7C Zero Air at 1600psi, AMP CA03923 3.3865 at 1800 CH4 Zero Offset: -.011ppm CH4 Span Offset: -.0085ppm Notes: Warm, breezy | |
| 2021-09-02 | TG1-0424 | LI-7700 | Moved | Gas Analyzer CH4 | Moved from SW to GT with the decomissioning of SW and the beginning of GT |
| 2021-11-30 | TG1-0424 | LI-7700 | Calibration | Gas Analyzer CH4 | Calibration Location: Gilbert Tract Last calibration: 2021-06-01 RSSI=85%, Optical RH=22% Ambient P=102.1kPa, Tair=15.2C Zero Air at 100psi, AMP CA04396 1.9317 at 1800 CH4 Zero Offset: .032ppm CH4 Span Offset: -.0197ppm Notes: Relatively still day with a lot of visitors to the site. The zero air tank pressure may have been >100psi, but the regulator was wonky. Zero was stable for 2min after applying zero. Swapped out the desiccant one for one with new drierite after calibration. I didn't flush out the headspace because I wanted to preserve the zero air for more calibrations that day. |
| 2022-06-09 | TG1-0424 | LI-7700 | Calibration | Calibration Location: Gilbert Tract Last calibration: 2021-11-30 RSSI=74%, Optical RH=16% Ambient P=101kPa, Tair=21.6C Zero Air at 450psi, AMP CA04119 4.2238 at 1450 CH4 Zero Offset: -.01ppm CH4 Span Offset: .0698ppm Notes: Breezy day. Did not change drierite or flush headspace with zero air. | |
| 2023-01-19 | TG1-0424 | LI-7700 | Calibration | Calibration Location: Gilbert Tract Last calibration: 2022-06-09 RSSI=86%, Optical RH=23% Ambient P=102.3kPa, Tair=8.0C Zero Air at 1350psi, AMP CA04396 1.9317 at 1250 CH4 Zero Offset: .001ppm CH4 Span Offset: .0017ppm Notes: I wanted to flush the headspace with zero air, but the tubing did not quite reach. I swapped the desiccant. | |
| 2023-08-08 | TG1-0424 | LI-7700 | Removed | Gas Analyzer CH4 | Removed from Gilbert Tract for calibration. Replaced by sn TG1-0223. |