Equipment and Calibration History
History for Licor LI-7500A 75H-2669
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 6924 | 2024-10-17 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End to replace sn 75H-2514 for calibration. |
| 6918 | 2024-10-16 | Lab | Calibration | Lab | Last calibration: 2024-04-10 AGC=99.8 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.4kPa, Tair=21.6C, Tdew=14.0C Zero Air at 1100psi, AMP FB04319 514.07 at 850 Tdewspan=20.00 CO2 zero 0.9189 -> .9203 Offset: 5.44ppm CO2 span 1.0177 -> 1.0143 Offset: 2.33ppm H2O zero 0.9012 -> .8979 Offset: -20.0ppm H2O span 1.0115 -> 1.0193 Offset: -.17ppm Notes: |
| 6773 | 2024-07-23 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End for calibration. Replaced by sn 75H-2514. |
| 6655 | 2024-04-11 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End to replace sn 75H-2182 for calibration. |
| 6646 | 2024-04-10 | Lab | Calibration | Lab | Last calibration: 2023-12-20 AGC=99.6 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.6kPa, Tair=26.04C, Tdew=12.04C Zero Air at 300psi, AMP CA04119 524.77 at 550 Tdewspan=20.00 CO2 zero 0.9187 -> .9189 Offset: .59ppm CO2 span 1.0167 -> 1.0177 Offset: -.65ppm H2O zero 0.9027 -> .9012 Offset: -8.8ppm H2O span 1.0206 -> 1.0115 Offset: .2ppm Notes: |
| 6632 | 2024-03-26 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0073. |
| 6503 | 2024-01-02 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi Tower to replace sn 75H-2180 for calibration. |
| 6491 | 2023-12-20 | Lab | 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 |
| 6479 | 2023-12-01 | Factory none | Received | Lab none | Received back from Licor. It was shipped with LI-7550 sn AIU-1866 which went back to Licor for (another) power board repair. There was nothing wrong with this 7500A sn 75H-2669, but Israel requested we send it back as well b/c it was connected when the LI-7550 broke. Licor replaced the 7550 power supply, subjected the units to environmental tests and verified the operation of the units. |
| 6469 | 2023-11-09 | Lab none | Factory none | Shipped back to Licor for repair of 7550 sn AIU-1866. This head was sent back to to the factory at Israel's request since it was the head connected to the 7550 when the 7550 died. | |
| 6465 | 2023-11-06 | Gilbert Tract Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2176. |
| 6361 | 2023-08-08 | Lab none | Installed | Gilbert Tract Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 0065 for calibration. |
| 6358 | 2023-08-04 | Lab | Calibration | Lab | Last calibration: 2023-04-10 AGC=100.6 SDM= DAC1= DAC2= AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.6kPa, Tair=22.1C, Tdew=13.9C Zero Air at 900psi, AMP CA04119 524.77 at 875 Tdewspan=16.00 CO2 zero 0.9207 -> .9195 Offset: -4.61ppm CO2 span 1.0176 -> 1.0167 Offset: .58ppm H2O zero 0.9001 -> .9009 Offset: 5.3ppm H2O span 1.0105 -> 1.0163 Offset: -.12ppm Notes: Vertical orientation |
| 6348 | 2023-07-24 | Bouldin Corn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Corn for calibration. Replaced by sn 0418. |
| 6257 | 2023-04-11 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed at Bouldin Corn to replace sn 0041 for calibration. |
| 6248 | 2023-04-10 | Lab | Calibration | Lab | Last calibration: 2023-01-04 AGC=101.5 SDM= DAC1= DAC2= Ambient P=100.6kPa, Tair=24.9C, Tdew=10.8C Zero Air at 1300psi, AMP CA04119 524.77 at 1150 Tdewspan=16.00 CO2 zero 0.9187 -> .9207 Offset: 7.69ppm CO2 span 1.0187 -> 1.0176 Offset: 0.83ppm H2O zero 0.9029 -> .9001 Offset: -17.3ppm H2O span 1.033 -> 1.0105 Offset: .47ppm Notes: Offsets are recorded using the 2023-01-04 calibration as the starting config file. Attempted calibration on 4/7 but the H2O zero offset was -38.3 after needing a long time (45+min) to stabilize. The H2O span offset never stabilized. I decided to swap the chemicals then and this is the first calibration since chemical swap. |
| 6249 | 2023-04-07 | Lab none | Maintenance | Lab none | Chemical swap. The magnesium perchlorate was a white powdery mass and had to be loosened with a screwdriver before it would all come out. The Ascarite II came out easily. I had tried to calibrate the sensor eariler in the day but the H2O zero offset was -38.3 mmol/m3 and took a long time (45+min) to stabilize. The H2O span never stabilized. |
| 6242 | 2023-04-03 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End for calibration. Replaced by sn 75H-2176. |
| 6161 | 2023-01-06 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End to replace sn 75H-2667 for calibration. |
| 6141 | 2023-01-04 | Lab | Calibration | Lab | Last calibration: 2022-08-23 AGC=101.1 SDM=0 DAC1=- DAC2=- Ambient P=99.5kPa, Tair=17.6C, Tdew=8.8C Zero Air at 1650psi, AMP CA04119 524.77 at 1250 Tdewspan=15.0 CO2 zero 0.9188 -> 0.9187 Offset: -0.3ppm CO2 span 1.0083 -> 1.0187 Offset: -7.17ppm H2O zero 0.904 -> 0.9029 Offset: -7.1ppm H2O span 1.0174 -> 1.0330 Offset: -0.31ppm Notes: Largish offset in CO2 span. |
| 6137 | 2022-12-21 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0418. |
| 5960 | 2022-08-25 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi-Tower to replace sn 0418 for calibration. |
| 5952 | 2022-08-23 | Lab | Calibration | Lab | Last calibration: 2021-12-09 AGC=95.8 SDM= DAC1= DAC2= Ambient P=100kPa, Tair=26.03C, Tdew=16.96C Zero Air at 300psi, AMP CA04119 524.77 at 1400 Tdewspan=20.00 CO2 zero 0.9186 -> .9188 Offset: .94ppm CO2 span 1.0133 -> 1.0083 Offset: 3.8ppm H2O zero 0.9008 -> .9040 Offset: 20.6ppm H2O span 1.0123 -> 1.0174 Offset: -.11ppm Notes: Calibration using AMP loaner 7550 sn AIU-1039 |
| 5805 | 2022-04-20 | Hill Slough Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Hill Slough for calibration and brought back to the lab. Replaced by sn 0035. |
| 5633 | 2021-12-14 | Lab none | Installed | Hill Slough none | Installed at Hill Slough to replace sn 75H-2176 for calibration. |
| 5628 | 2021-12-09 | Lab | Calibration | Lab | Last calibration: 2021-08-31 AGC=100.7 SDM= DAC1= DAC2= Ambient P=100.4kPa, Tair=25.6C, Tdew=6.06C Zero Air at 100psi, AMP CA04119 524.77 at 1700 Tdewspan=20.00 CO2 zero 0.9188 -> .9186 Offset: -.81ppm CO2 span 1.0127 -> 1.0133 Offset: -.02ppm H2O zero 0.9005 -> .9008 Offset: 2.1ppm H2O span 1.0086 -> 1.0123 Offset: -.09ppm Notes: Not much air left in the zero air tank, but the zero was stable for 2+ min after setting the zeros, so I feel comfortable the calibration was good. Initially forgot to save the new config, so re-opened the prev file from 2021-08-31, entered the 4 coefficients manually, and saved with today's date. |
| 5598 | 2021-12-02 | Tonzi-Floor Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Floor for calibration. Replaced by sn 0073. |
| 5443 | 2021-09-01 | Lab none | Installed | Tonzi-Floor Gas Analyzer CO2/H2O | Installed at Tonzi-Floor to replace sn 0418 for calibration. |
| 5435 | 2021-08-31 | Lab | Calibration | Lab | Last calibration: 2021-03-01 AGC=100.8 SDM=0 DAC1=- DAC2=- Ambient P=99.7kPa, Tair=26.2C, Tdew=13.6C Zero Air at 1800psi, AMP CA04119 524.77 at 1700 Tdewspan=20.0 CO2 zero 0.919 -> 0.9188 Offset: -0.85ppm CO2 span 1.0059 -> 1.0127 Offset: -4.77ppm H2O zero 0.8984 -> 0.9005 Offset: 13.3ppm H2O span 1.0033 -> 1.0086 Offset: -0.12ppm Notes: |
| 5318 | 2021-06-09 | Bouldin Alfalfa Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Alfalfa for calibration. Replaced by sn 75H-2176. |
| 5169 | 2021-03-04 | Lab none | Installed | Bouldin Alfalfa Gas Analyzer CO2/H2O | Installed at Bouldin Alfalfa to replace sn 75H-2182 for calibration. |
| 5144 | 2021-03-01 | Lab | Calibration | Lab | Last calibration: 2020-08-27 AGC=101.8 SDM=0 DAC1=- DAC2=- Ambient P=100.4kPa, Tair=29.0C, Tdew=1.3C Zero Air at 500psi, AMP CA04396 408.97 at 300 Tdewspan=20.0 CO2 zero 0.9184 -> 0.9190 Offset: 2.3ppm CO2 span 1.0118 -> 1.0059 Offset: 3.03ppm H2O zero 0.9012 -> 0.8984 Offset: -17.2ppm H2O span 1.0121 -> 1.0033 Offset: 0.19ppm Notes: Flow rated larger than usual - 2lpm instead of 2cfpm. Dew point generator problems before cal - dew point stuck at 34 instead of 20C. The dewpt gen was fixed an ran at 20C before starting H2O span but dewpt initially jumped to 25C but steadily declined to 20C. I double checked CO2 zero/span and H2O zero afterwards and they seemed fine. |
| 5029 | 2020-12-09 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Mayberry for calibration. Replaced by sn 0073. |
| 4715 | 2020-08-28 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Installed at Mayberry to replace sn 0035 for calibration. |
| 4692 | 2020-08-27 | Lab | Calibration | Lab | Last calibration: 2020-05-22 AGC=100.9 SDM= DAC1= DAC2= Ambient P=99.9kPa, Tair=23.7C, Tdew=12.4C Zero Air at 600psi, AMP CA4396 408.97 at 425 Tdewspan=20.00 CO2 zero 0.9185 -> .9184 Offset: -.32ppm CO2 span 1.0124 -> 1.0118 Offset: .52ppm H2O zero 0.8999 -> .9012 Offset: 8.3ppm H2O span 1.0094 -> 1.0121 Offset: -.06ppm Notes: |
| 4702 | 2020-08-26 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Vaira for calibration. Replaced by sn 75H-2176. |
| 4502 | 2020-05-23 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed at Vaira to replace sn 0073 for calibration. |
| 4530 | 2020-05-22 | Lab | Calibration | Lab | Last calibration: 2020-02-04 AGC=100.7 SDM=0 DAC1=- DAC2=- Ambient P=100.2kPa, Tair=23.5C, Tdew=8.3C Zero Air at 750psi, AMP CA04396 408.97 at 600 Tdewspan=16.0 CO2 zero 0.9184 -> 0.9185 Offset: 0.44ppm CO2 span 1.016 -> 1.0124 Offset: 1.78ppm H2O zero 0.9006 -> 0.8999 Offset: -4.3ppm H2O span 1.0101 -> 1.0094 Offset: 0.01ppm Notes: |
| 4496 | 2020-05-21 | Sherman Barn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Sherman Barn and brought back to the lab for calibration. Replaced by sn 75H-2668. |
| 4365 | 2020-02-06 | Lab none | Installed | Sherman Barn Gas Analyzer CO2/H2O | Installed at Sherman Barn to replace sn 75H-2668, which was brought back to the lab for calibration. |
| 4359 | 2020-02-04 | Lab | Calibration | Lab | Last calibration: 2019-08-01 AGC=102.0 SDM=0 DAC1=- DAC2=- Ambient P=101.3kPa, Tair=25.6C, Tdew=-5.2C Zero Air at 850psi, AMP CA04396 408.97 at 550 Tdewspan=16.0 CO2 zero 0.9178 -> 0.9184 Offset: 2.3ppm CO2 span 1.0125 -> 1.0160 Offset: -1.87ppm H2O zero 0.9019 -> 0.9006 Offset: -8.4ppm H2O span 1.015 -> 1.0101 Offset: 0.1ppm Notes: |
| 4161 | 2019-11-14 | Bouldin Corn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Corn and brought back to lab for calibration. Replaced by sn 0042. |
| 4038 | 2019-08-07 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed at BC to replace sn 0073, which was brought back to the lab for calibration. |
| 4033 | 2019-08-01 | Lab none | Calibration | Lab none | Last calibration: 2019-04-15
AGC=102.6 SDM= DAC1= DAC2= Ambient P=100.7kPa, Tair=22.7C, Tdew=14.1C Zero Air at 975psi, AMP CA4396 408.97 at 800 Tdewspan=20.00 CO2 zero 0.9186 -> .9178 Offset: -3.12ppm CO2 span 1.0134 -> 1.0125 Offset: .53ppm H2O zero 0.8991 -> .9019 Offset: 17.8ppm H2O span 1.0017 -> 1.015 Offset: -.3ppm Notes: When SS was 102.6, I reset it to 100. I uploaded the the calibration file from 2018-10-24 and copied in the manual coefficients for CO2 span, CO2 zero, H2O span, and H2O zero from the database's record of the most recent calibration on 2019-04-15. |
| 4028 | 2019-07-25 | Sherman Barn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from SB and brought back to the lab for calibration. it was replaced by sn 75H-2667. |
| 3927 | 2019-04-18 | Lab none | Installed | Sherman Barn Gas Analyzer CO2/H2O | Installed at SB to replace sn 75H-2180, which was brought back to the lab for calibration. |
| 3911 | 2019-04-15 | Lab none | Calibration | Lab none | Last calibration: 2018-10-10 AGC=103.8 SDM=0 DAC1=- DAC2=- Ambient P=100.16kPa, Tair=24.85C, Tdew=6.62C Zero Air 369068 at 1150psi, AMP CA04396 408.97 at 800 Tdewspan=15.99 CO2 zero 0.9188 -> 0.9186 Offset: -1.10ppm CO2 span 1.0106 -> 1.0134 Offset: -1.52ppm H2O zero 0.8992 -> 0.8991 Offset: -0.3ppm H2O span 1.0034 -> 1.0017 Offset: 0.03ppm Notes: Very stable - Joe |
| 3873 | 2019-01-31 | Sherman Barn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from SB and brought back to the lab for calibration. It was replaced by 75H-2180. |
| 3753 | 2018-10-18 | Lab none | Installed | Sherman Barn Gas Analyzer CO2/H2O | Installed on Sherman Barn to replace sn 0041 for calibration |
| 3735 | 2018-10-10 | Lab none | Calibration | Lab none | Last calibration: 2018-10-09 AGC=102 SDM=0 DAC1=0 DAC2=0 Ambient P=99.9kPa, Tair=26.6C, Tdew=12.9C Zero Air at 1400psi, AMP Air 408.97 at 1100 Tdewspan=16.00 CO2 zero 0.918 -> .9188 Offset: 3.4ppm CO2 span 1.0125 -> 1.0106 Offset: .9ppm H2O zero 0.8989 -> .8992 Offset: 1.6ppm H2O span 1.0049 -> 1.0034 Offset: .04ppm Notes: Re-calibrated to check Katrina's calibration yesterday, which looks good. |
| 3734 | 2018-10-09 | Lab none | Calibration | Lab none | Last calibration: 2018-06-25 AGC=103 SDM=0 DAC1=0 DAC2=0 Ambient P=99.88kPa, Tair=27.1C, Tdew=12.9C Zero Air at 1425psi, AMP Air 408.97 at 1200 Tdewspan=16.00 CO2 zero 0.9182 -> .9180 Offset: -.8ppm CO2 span 1.0125 -> 1.0125 Offset: 2.2ppm H2O zero 0.8994 -> .8989 Offset: 52.7ppm H2O span 1.0062 -> 1.0049 Offset: 16.02ppm Notes: Calibrated by Katrina. The H2O offset is large, but the change is coefficients is small, so perhaps Katrina wrote down the wrong offset. |
| 3722 | 2018-10-04 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Mayberry for calibration. Replaced by sn 1594 |
| 3554 | 2018-06-28 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Installed at MB to replace sn 75H-2150, which was brought back to the lab for calibration. |
| 3538 | 2018-06-25 | Lab none | Calibration | Lab none | Last calibration: 2017-12-15 AGC=104.2 SDM=0 DAC1=- DAC2=- Ambient P=100.4kPa, Tair=26.1C, Tdew=11.9C Zero Air at 350psi, AMP 408.97 at 1350 Tdewspan=15.99 CO2 zero 0.9187 -> 0.9182 Offset: -2.11ppm CO2 span 1.0157 -> 1.0125 Offset: 1.68ppm H2O zero 0.8988 -> 0.8994 Offset: 3.3ppm H2O span 1.0033 -> 1.0062 Offset: -0.06ppm Notes: Calibrated by Joe |
| 3422 | 2018-04-20 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from EE and brought back to the lab for calibration. It was replaced by sn 0073. |
| 3238 | 2017-12-18 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed on East End to replace sn 0041 for calibration. The AIU software was upgrade from v8.0.0 to v8.5.0 |
| 3235 | 2017-12-15 | Lab none | Calibration | Lab none | Last calibration: 2017-08-14 AGC=103.3 SDM=0 DAC1=0 DAC2=0 Ambient P=100.7kPa, Tair=22.2C, Tdew=7C Zero Air at 250psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.9187 -> .9187 Offset: .39ppm CO2 span 1.0144 -> 1.0157 Offset: -.73ppm H2O zero 0.8988 -> .8988 Offset: .2ppm H2O span 1.0091 -> 1.0033 Offset: .12ppm Notes: |
| 3222 | 2017-11-30 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from MB and brought back to the lab for calibration. |
| 3036 | 2017-08-16 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Installed at MB to replace sn 75H-2180. |
| 2965 | 2017-08-14 | Lab none | Calibration | Lab none | Last calibration: 2017-08-07
AGC=103.2 SDM=0 DAC1=0 DAC2=0 Ambient P=100.2kPa, Tair=21.9C, Tdew=12.8C Zero Air at 1100psi, AMP Air 408.97 at 2000 Tdewspan=16.00 CO2 zero 0.9189 -> .9187 Offset: -1.86ppm CO2 span 1.0159 -> 1.0144 Offset: -1.51ppm H2O zero 0.8971 -> .8988 Offset: 6.3ppm H2O span 1.0282 -> 1.0091 Offset: -0.08ppm Notes: Previous calibration did not have updated pressure coefficients from 7550 interface, so I re-did the calibration |
| 2962 | 2017-08-07 | Lab none | Calibration | Lab none | Last calibration: 2017-08-01 AGC=103.5 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=22.9C, Tdew=12.9C Zero Air at 1150psi, AMP Air 408.97 at 2100 Tdewspan=16.00 CO2 zero 0.9199 -> .9189 Offset: -.7ppm CO2 span 0.9533 -> 1.0159 Offset: -2.44ppm H2O zero 0.9118 -> .8971 Offset: -4.7ppm H2O span 0.8978 -> 1.0282 Offset: -.32ppm Notes: Previous calibration did not have correct 5th-order-polynomials, which is why the offsets were huge. |
| 2942 | 2017-08-01 | Lab none | Calibration | Lab none | Last calibration: 2017-03-21 AGC=100.1 SDM= DAC1= DAC2= Ambient P=100.2kPa, Tair=24.0C, Tdew=15.8C Zero Air at 1200psi, LBL Air 408.97 at 2100 Tdewspan=16.00 CO2 zero 0.9191 -> .9199 Offset: 3.65ppm CO2 span 1.0115 -> .9533 Offset: 33.15ppm H2O zero 0.8978 -> .9118 Offset: 78.4ppm H2O span 1.0138 -> .8978 Offset: 2.66ppm Notes: Manually entered in existing coefficients before the calibration because did not have existing config file (usual laptop was elsewhere). Maybe I had entered the coefficients incorrectly in the database? |
| 2848 | 2017-06-23 | Sherman Wetland Gas Analyzer CO2/H2O | Removed | Lab none | Removed for calibration from Sherman Wetland; replaced by 75H-2514. |
| 2679 | 2017-03-29 | Lab none | Installed | Sherman Wetland Gas Analyzer CO2/H2O | Installed at Sherman Wetland to replace sn 75H-2180. |
| 2659 | 2017-03-21 | Lab none | Calibration | Lab none | Last calibration: 2016-12-19 AGC=104.3 SDM= DAC1= DAC2= Ambient P=99.8kPa, Tair=23.16C, Tdew=9.9C Zero Air at 1700psi, God CO2 421.22 at 350 Tdewspan=16.00 CO2 zero 0.9184 -> 0.9191 Offset: 2.77ppm CO2 span 1.0119 -> 1.0115 Offset: 0.10ppm H2O zero 0.8989 -> 0.8978 Offset: -7.0ppm H2O span 1.0109 -> 1.0138 Offset: -0.07ppm Notes: |
| 2654 | 2017-03-15 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End and brought back to lab for calibration. It was replaced by sn 75H-2514. |
| 2556 | 2016-12-21 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End after calibration in the lab to replace 75H-2514 |
| 2552 | 2016-12-19 | Lab none | Calibration | Lab none | Last calibration: 2016-07-19 AGC=104.5 SDM=6 DAC1=- DAC2=- Ambient P=101.24kPa, Tair=21.21C, Tdew=0.0C Zero Air at 300psi, God CO2 421.22 at 400 Tdewspan=16.00 CO2 zero 0.919 -> 0.9184 Offset: -2.14ppm CO2 span 1.0141 -> 1.0119 Offset: 1.13ppm H2O zero 0.9987 -> 0.8989 Offset: 25.1ppm H2O span 1.0143 -> 1.0109 Offset: 0.07ppm Notes: |
| 2512 | 2016-10-26 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Mayberry tower for calibration. Replaced by 75H-2176 |
| 2388 | 2016-07-20 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Installed on the Mayberry tower to replace sn 75H-2182 for calibration |
| 2366 | 2016-07-19 | Lab none | Calibration | Lab none | Last calibration: 2015-07-22 AGC=102.5 SDM=1 DAC1=- DAC2=- Ambient P=102.5kPa, Tair=20.08C, Tdew=14.29C Zero Air at 500psi, God CO2 421.22 at 450 Tdewspan=16.00 CO2 zero 0.9197 -> 0.9190 Offset: -2.83ppm CO2 span 1.0015 -> 1.0141 Offset: -6.87ppm H2O zero 0.8907 -> 0.9987 Offset: 27.8ppm H2O span 0.9987 -> 1.0143 Offset: -0.33ppm Notes: First time this sensor has been calibrated in the lab. Last cal was by Licor using 749.7ppm CO2 and 11.98C dew point. Offsets a little high especially H2O zero. Difference in calibration equipment and procedures? |
| 2140 | 2015-12-23 | Twitchell Rice-Trailer | Removed | Lab none | Removed with the temporary tower set up near the building at the rice project for the LGR COS experiment. |
| 2117 | 2015-12-08 | Lab none | Installed | Twitchell Rice-Trailer | Installed near the trailer at Twitchell Rice as a temporary site to test a COS analyzer from LGR |