Equipment and Calibration History
History for Licor LI-7500A 1594
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 6863 | 2024-09-27 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi-Tower to replace sn 0418 for calibration. |
| 6854 | 2024-09-26 | Lab | Calibration | Lab | Last calibration: 2024-01-10 AGC=99.8 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.1kPa, Tair=23.7C, Tdew=14.0C Zero Air at 1350psi, AMP CA03923 488.75 at 1450 Tdewspan=20.0 CO2 zero 0.8774 -> 0.8769 Offset: -2.0ppm CO2 span 1.0093 -> 1.0086 Offset: 0.4ppm H2O zero 0.8142 -> 0.8147 Offset: 3.0ppm H2O span 1.0062 -> 1.0096 Offset: -0.08ppm Notes: |
| 6659 | 2024-04-16 | Hill Slough Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Hill Slough for calibration. Replaced by sn 0035. |
| 6539 | 2024-01-18 | Lab none | Installed | Hill Slough Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 0418 for calibration. |
| 6524 | 2024-01-10 | Lab | Calibration | Lab | Last calibration: 2023-10-03 AGC=103 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.22kPa, Tair=21.03C, Tdew=9.42C Zero Air at 450psi, AMP CA04119 524.77 at 675 Tdewspan=18.00 CO2 zero 0.8777 -> .8774 Offset: -1.37ppm CO2 span 1.0092 -> 1.0093 Offset: -.7ppm H2O zero 0.8117 -> .8142 Offset: 14.7ppm H2O span 1.0074 -> 1.0062 Offset: .03ppm Notes: Vertical orientation. Reset SS from 103 to 100 after cal. |
| 6520 | 2024-01-04 | West Pond Gas Analyzer CO2/H2O | Removed | Lab none | Removed from WP tower with initial decommissioning of the site |
| 6428 | 2023-10-04 | Lab none | Installed | West Pond Gas Analyzer CO2/H2O | Installed at West Pond to replace sn 75H-2514, which needs to go back to the factory for RMA (PLL error, CO2 and H2O were both 0). |
| 6424 | 2023-10-03 | Lab | Calibration | Lab | Last calibration: 2023-06-12 AGC=100.7 SDM= DAC1= DAC2= AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.4kPa, Tair=23.5C, Tdew=13.3C Zero Air at 750psi, AMP CA04119 524.77 at 700 Tdewspan=20.00 CO2 zero 0.8777 -> .8777 Offset: .4ppm CO2 span 1.0098 -> 1.0092 Offset: .31ppm H2O zero 0.811 -> .8117 Offset: 4.0ppm H2O span 1.0126 -> 1.0074 Offset: .12ppm Notes: Vertical orientation |
| 6421 | 2023-09-19 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Vaira for calibration. Replaced by sn 0065. |
| 6314 | 2023-06-16 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed at Vaira to replace sn 75H-2514 for calibration. |
| 6317 | 2023-06-12 | Lab | Calibration | Lab | Last calibration: 2023-03-14 AGC=101.1 SDM=0 DAC1=- DAC2=- AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.6kPa, Tair=21.0C, Tdew=12.3C Zero Air at 1150psi, AMP CA04119 524.77 at 1050 Tdewspan=16.01 CO2 zero 0.8778 -> 0.8777 Offset: -0.6ppm CO2 span 1.0027 -> 1.0098 Offset: -5.07ppm H2O zero 0.8067 -> 0.8110 Offset: 25.5ppm H2O span 0.9989 -> 1.0126 Offset: -0.4ppm Notes: First lab calibration since repair at Licor - the usual larger offsets. Coefficients were all entered manually and the IRGA was vertical for this calibration. |
| 6298 | 2023-05-30 | Factory none | Received | Lab none | Received back from Licor factory. Lamp was replaced and the sensor was recalibrated. |
| 6296 | 2023-04-14 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for repair. It had zero signal strength when we arrived. Replaced by sn 75H-2667. |
| 6218 | 2023-03-16 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi-Tower to replace sn 0418 for calibration. |
| 6213 | 2023-03-14 | Lab | Calibration | Lab | Last calibration: 2023-01-25 AGC=100.7 SDM=0 DAC1=- DAC2=- Ambient P=99.1kPa, Tair=19.3C, Tdew=12.77C Zero Air at 1400psi, AMP CA04119 524.77 at 1250 Tdewspan=16.0 CO2 zero 0.8656 -> 0.8656 Offset: 0.04ppm CO2 span 1.0205 -> 1.0225 Offset: -1.37ppm H2O zero 0.8869 -> 0.8885 Offset: 9.0ppm H2O span 1.0127 -> 1.0196 Offset: -0.14ppm Notes: Using AMP loaner AIU-2312 |
| 6181 | 2023-01-27 | Lab none | Tested | Lab none | Ran in the lab on the bench for 2 days and used eddypro to calculate the 30-min concentrations. CO2 and H2O data seemed reasonable: CO2 ranged from 420 to 510ppm and H2O ranged from 250 to 450 mmol/m3. Not sure why this sensor wasn't working in the field. |
| 6178 | 2023-01-25 | Lab | Calibration | Lab | Last calibration: 2022-11-28 AGC=99 SDM= DAC1= DAC2= Ambient P=101.5kPa, Tair=23.4C, Tdew=2.53C Zero Air at 1450psi, AMP CA04119 524.77 at 1250 Tdewspan=16.00 CO2 zero 0.8643 -> .8656 Offset: 5.31ppm CO2 span 1.0168 -> 1.0205 Offset: -2.43ppm H2O zero 0.8889 -> .8869 Offset: -10.6ppm H2O span 1.0136 -> 1.0127 Offset: .02ppm Notes: This sensor was not working at BC, but it worked in the lab and the calibration seems within normal range. I'll run it for a few days in the lab to see if it's stable. |
| 6156 | 2023-01-06 | Bouldin Corn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Corn because no CO2/H2O data since mid December. Replaced by sn 0041. |
| 6101 | 2022-11-30 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed at Bouldin Corn to replace sn 75H-2180 for calibration. |
| 6123 | 2022-11-28 | Lab | Calibration | Lab | Last calibration: 2022-04-08 AGC=98.3 SDM= DAC1= DAC2= Ambient P=100.3kPa, Tair=20.9C, Tdew=4.05C Zero Air at 1800psi, AMP CA04119 524.77 at 1350 Tdewspan=16.00 CO2 zero 0.8643 -> .8643 Offset: -.38ppm CO2 span 1.0097 -> 1.0168 Offset: -4.93ppm H2O zero 0.8891 -> .8889 Offset: -1.1ppm H2O span 1.0106 -> 1.0136 Offset: -.06ppm Notes: Set H2O span on 2022-11-29 using 16.00C. Ambient T=22.4 and Dew Point = 0.77C. |
| 6092 | 2022-11-18 | Bouldin Alfalfa Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Alfalfa for calibration. Replaced by sn 0073. |
| 5797 | 2022-04-13 | Lab none | Installed | Bouldin Alfalfa Heat Flux Plate B | Installed at Bouldin Alfalfa to replace sn 75H-2176 for calibration. |
| 5774 | 2022-04-08 | Lab | Calibration | Lab | Last calibration: 2021-11-30 AGC=96.7 SDM= DAC1= DAC2= Ambient P=100.6kPa, Tair=30.8C, Tdew=11.2C Zero Air at 725psi, AMP CA04119 524.77 at 1600 Tdewspan=20.00 CO2 zero 0.8645 -> .8643 Offset: -.71ppm CO2 span 1.0128 -> 1.0097 Offset: 2.12ppm H2O zero 0.8877 -> .8891 Offset: 7.7ppm H2O span 1.0045 -> 1.0106 Offset: -.13ppm Notes: |
| 5769 | 2022-03-31 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Mayberry for calibration. Replaced by sn 75H-2180. |
| 5623 | 2021-12-01 | Lab none | Installed | Mayberry none | Installed at Mayberry to replace sn 0418, which was brought back to the lab for repair. |
| 5595 | 2021-11-30 | Lab | Calibration | Lab | Last calibration: 2021-05-25 AGC=97.5 SDM=0 DAC1=- DAC2=- Ambient P=100.8kPa, Tair=27.6C, Tdew=12.7C Zero Air at 1350psi, AMP CA04119 524.77 at 1700 Tdewspan=20.0 CO2 zero 0.8648 -> 0.8645 Offset: -1.4ppm CO2 span 1.0136 -> 1.0128 Offset: 0.53ppm H2O zero 0.8861 -> 0.8877 Offset: 8.7ppm H2O span 1.005 -> 1.0045 Offset: 0.01ppm Notes: |
| 5488 | 2021-10-07 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End for calibration. Replaced by sn 75H-2667. |
| 5283 | 2021-05-26 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End to replace sn 0065 for calibration. |
| 5267 | 2021-05-25 | Lab | Calibration | Lab | Last calibration: 2021-02-01 AGC=98.0 SDM=0 DAC1=- DAC2=- Ambient P=100.7kPa, Tair=26.2C, Tdew=9.1C Zero Air at 350psi, AMP CA03923 474.19 at 500 Tdewspan=20.0 CO2 zero 0.8646 -> 0.8648 Offset: 0.9ppm CO2 span 1.0131 -> 1.0136 Offset: -0.19ppm H2O zero 0.889 -> 0.8861 Offset: -15.3ppm H2O span 1 -> 1.0050 Offset: -.12ppm Notes: Complaining about GPS location number formats |
| 5166 | 2021-03-04 | Bouldin Corn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Corn and brought back to the lab for calibration. Replaced by sn 75H-2514. |
| 5091 | 2021-02-03 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed on the BC tower to replace sensors damaged when the tower fell last week |
| 5108 | 2021-02-01 | Lab | Calibration | Lab | Last calibration: 2020-08-20 AGC=99.3 SDM=0 DAC1=- DAC2=- Ambient P=100.3kPa, Tair=28.4C, Tdew=11.0C Zero Air at 0psi, AMP CA04396 408.97 at 0 Tdewspan=20.0 CO2 zero 0.8651 -> 0.8646 Offset: -2.1ppm CO2 span 1.02124 -> 1.0131 Offset: -0.32ppm H2O zero 0.8838 -> 0.8890 Offset: 29.85ppm H2O span 1.015 -> 1.000 Offset: 0.35ppm Notes: The usual 7550 box in the lab is running the newest firmware v8.8 and is complaining that the v8.5 config file has bad number formats for GPS locations. I used 7550 sn AIU-1866 for calibration instead. This box and head will go to replace equipment on the BC tower that fell in the water. |
| 5019 | 2020-12-03 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End for calibration. Replaced by sn 0041. |
| 4680 | 2020-08-21 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End to replace sn 0042 for calibration. |
| 4670 | 2020-08-20 | Lab | Calibration | Lab | Last calibration: 2020-02-11 AGC=98.5 SDM= DAC1= DAC2= Ambient P=100.1kPa, Tair=28.9C, Tdew=13.6C Zero Air at 700psi, AMP CA4396 408.97 at 550 Tdewspan=16.00 CO2 zero 0.8657 -> .8651 Offset: -2.5ppm CO2 span 1.0203 -> 1.02124 Offset: 4.07ppm H2O zero 0.8831 -> 0.8838 Offset: 3.8ppm H2O span 1.012 -> 1.0150 Offset: -0.06ppm Notes: Zero offsets a bit larger than I expected. Air quality bad inside from wildfire smoke leaking in through windows |
| 4505 | 2020-05-23 | Tonzi-Floor | Removed | Lab none | Removed from Tonzi-Floor for calibration. Replaced by sn 75H-2514. |
| 4375 | 2020-02-12 | Lab | Installed | Tonzi-Floor | Installed at Tonzi Floor to replace sn 0418 for calibration. |
| 4368 | 2020-02-11 | Lab | Calibration | Lab | Last calibration: 2019-10-30 AGC=101.4 SDM=0 DAC1=- DAC2=- Ambient P=100.8kPa, Tair=26.1C, Tdew=-4.92C Zero Air at 800psi, AMP CA04396 408.97 at 550 Tdewspan=16.0 CO2 zero 0.8646 -> 0.8657 Offset: 4.6ppm CO2 span 1.0166 -> 1.0203 Offset: -1.92ppm H2O zero 0.8895 -> 0.8831 Offset: -18.3ppm H2O span 0.9958 -> 1.0120 Offset: -0.34ppm Notes: Ambient air very dry. Zero offsets a bit larger than normal. |
| 4366 | 2020-02-06 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Mayberry and brought back to the lab for calibration. Replaced by sn 0065. |
| 4139 | 2019-10-31 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Installed at Mayberry to replace sn 0042 for calibration. |
| 4127 | 2019-10-30 | Lab none | Calibration | Lab none | Last calibration: 2019-04-26 AGC=99.6 SDM=0 DAC1=- DAC2=- Ambient P=100.9kPa, Tair=24.6C, Tdew=-11.9C Zero Air at 900psi, AMP CA04396 408.97 at 800 Tdewspan=20.0 CO2 zero 0.8646 -> 0.8646 Offset: -0.3ppm CO2 span 1.0178 -> 1.0166 Offset: 0.53ppm H2O zero 0.8868 -> 0.8895 Offset: -1.7ppm H2O span 1.0026 -> 0.9958 Offset: 0.18ppm Notes: Ambient air was very dry. Joe |
| 4062 | 2019-08-22 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi Tower for calibration. Replaced by sn 0065. |
| 3974 | 2019-04-30 | Lab none | Installed | Tonzi-Tower | Installed on the Tower to replace sn 0042 for calibration. Using Floor 7550 box because Tower 7550 box died |
| 3942 | 2019-04-26 | Lab none | Calibration | Lab none | Last calibration: 2019-01-30 AGC=99.5 SDM= DAC1= DAC2= Ambient P=100.4kPa, Tair=24.1C, Tdew=10.2C Zero Air at 1050psi, AMP CA4396 408.97 at 700 Tdewspan=16.00 CO2 zero 0.8643 -> .8646 Offset: 1.33ppm CO2 span 1.0157 -> 1.0178 Offset: -1.16ppm H2O zero 0.8891 -> .8868 Offset: -12.6ppm H2O span 1.0043 -> 1.0026 Offset: .04ppm Notes: |
| 3939 | 2019-04-25 | Bouldin Corn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Corn for calibration. Replaced by sn 0073. |
| 3872 | 2019-01-31 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed at BC to replace sn 75H-2668, which was brought back to the lab for calibration. |
| 3859 | 2019-01-30 | Lab none | Calibration | Lab none | Last calibration: 2018-10-03 AGC=98.88 SDM=0 DAC1=0 DAC2=0 Ambient P=100.07kPa, Tair=27.07C, Tdew=10.85C Zero Air at 1200psi, AMP Air 408.97 at 825 Tdewspan=16.00 CO2 zero 0.8644 -> .8643 Offset: -.16ppm CO2 span 1.015 -> 1.0157 Offset: .5ppm H2O zero 0.887 -> .8891 Offset: 11.9ppm H2O span 1.0056 -> 1.0043 Offset: .02ppm Notes: Calibrated by Jiangong. |
| 3838 | 2019-01-18 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab Gas Analyzer CO2/H2O | Removed from MB and brought back to the lab for calibration. It was replaced by sn 75H-2514. |
| 3723 | 2018-10-04 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Installed on the Mayberry tower to replace sn 75H-2669 for calibration. |
| 3719 | 2018-10-03 | Lab none | Calibration | Lab none | Last calibration: 2018-06-25 AGC=98.6 SDM=0 DAC1=0 DAC2=0 Ambient P=100.16kPa, Tair=28.4C, Tdew=15.18C Zero Air at 1500psi, AMP Air 408.97 at 1200 Tdewspan=20.00 CO2 zero 0.8648 -> .8644 Offset: -1.74ppm CO2 span 1.0181 -> 1.0150 Offset: 1.68ppm H2O zero 0.8869 -> .8870 Offset: 0.8ppm H2O span 1.0106 -> 1.0056 Offset: .11ppm Notes: Spanned H2O at 20.00 because initial dew point temperature in the room was > 16.00 degC. |
| 3708 | 2018-09-27 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Vaira Tower for calibration. Replaced by sn 0065. |
| 3545 | 2018-06-26 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed at Vaira to replace en 75H-2182 for calibration |
| 3540 | 2018-06-25 | Lab none | Calibration | Lab none | Last calibration: 2018-04-04 AGC=99.9 SDM=0 DAC1=- DAC2=- Ambient P=100.5kPa, Tair=26.1C, Tdew=12.9C Zero Air at 350psi, AMP 408.97 at 1350 Tdewspan=15.99 CO2 zero 0.8651 -> 0.8648 Offset: -1.50ppm CO2 span 1.0185 -> 1.0181 Offset: 0.13ppm H2O zero 0.8854 -> 0.8869 Offset: 8.0ppm H2O span 1.0064 -> 1.0106 Offset: -0.09ppm Notes: Calibrated by Joe |
| 3532 | 2018-06-13 | Twitchell Alfalfa Gas Analyzer CO2/H2O | Removed | Lab none | Removed with Twitchell Alfalfa site decommissioning. |
| 3388 | 2018-04-05 | Lab none | Installed | Twitchell Alfalfa Gas Analyzer CO2/H2O | Installed at TA to replace sn 75H-2514, which was brought back to the lab for calibration. |
| 3379 | 2018-04-04 | Lab none | Calibration | Lab none | Last calibration: 2017-11-28 AGC=99 SDM=0. DAC1=0 DAC2=0 Ambient P=100.8kPa, Tair=21.3C, Tdew=6.7C Zero Air at 100psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.8653 -> .8654 Offset: -.58ppm CO2 span 1.0172 -> 1.0185 Offset: -.63ppm H2O zero 0.8868 -> .8854 Offset: -7.2ppm H2O span 1 -> 1.0064 Offset: -.14ppm Notes: Calibrated on LI-7550 sn 674 with 8.5.0 embedded software version. |
| 3373 | 2018-03-06 | Tonzi-Floor Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi Floor and brought back to the lab for calibration. It was replaced by sn 0042. |
| 3215 | 2017-11-29 | Lab none | Installed | Tonzi-Floor | Installed on the Tonzi Floor to replace sn 75H-2180 for calibration. |
| 3205 | 2017-11-28 | Lab none | Calibration | Lab none | Last calibration: 2017-09-27 AGC=99.9 SDM=0 DAC1=0 DAC2=0 Ambient P=100.5kPa, Tair=23.0C, Tdew=8.7C Zero Air at 300psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.8638 -> .8653 Offset: 6.09ppm CO2 span 1.0168 -> 1.0172 Offset: -.23ppm H2O zero 0.8878 -> .8868 Offset: -5.6ppm H2O span 1.0047 -> 1.0000 Offset: 0.1ppm Notes: Calibrated on 7550 software version 8.7.5 |
| 3195 | 2017-11-13 | Bouldin Corn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Corn because it was calibrated on LI-7550 with embedded software v. 8.7.5 and the LI-7550 at the tower is embedded software v 8.5.0, so we were worried this software mismatch would produce wonky data. Replaced by sn 75H-2176. |
| 3157 | 2017-10-19 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed on Bouldin Corn to replace sn 75H-2668 for calibration. |
| 3082 | 2017-09-27 | Lab none | Calibration | Lab none | Last calibration: 2017-05-30
AGC=97.2 SDM=0 DAC1=0 DAC2=0 Ambient P=100.1kPa, Tair=29.4C, Tdew=12.3C Zero Air at 590psi, AMP Air 408.97 at 2100 Tdewspan=16.00 CO2 zero 0.8653 -> .8638 Offset: -6.17ppm CO2 span 1.0187 -> 1.0168 Offset: 1.13ppm H2O zero 0.8861 -> .8878 Offset: 9.5ppm H2O span 1.0256 -> 1.0047 Offset: .44ppm Notes: When I checked ffsets after this calibration, CO2 zero offset=-0.64 ppm, H2O zero offset=1.2 mmol/m3, and CO2 span offset=0.21 ppm. Calibrated on LI-7550 with embedded software version 8.7.5. |
| 3043 | 2017-09-06 | Twitchell Alfalfa Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Twitchell Alfalfa for calibration. Replaced by sn 0035. |
| 2831 | 2017-06-05 | Lab none | Installed | Twitchell Alfalfa Gas Analyzer CO2/H2O | Installed at Twitchell Alfalfa to replace sn 75H-2176. |
| 2795 | 2017-05-30 | Lab none | Calibration | Lab none | Last calibration: 2017-01-27 AGC=101.4 SDM= DAC1= DAC2= Ambient P=99.7kPa, Tair=19.3C, Tdew=9.5C Zero Air at 1050psi, NOAA Air 402.69 at 1600 Tdewspan=16.00 CO2 zero 0.8654 -> .8653 Offset: .79ppm CO2 span 1.0194 -> 1.0187 Offset: 0.42ppm H2O zero 0.8868 -> .8861 Offset: -4.1ppm H2O span 1.0067 -> 1.0256 Offset: -.39ppm Notes: |
| 2735 | 2017-04-27 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Mayberry for calibration. Replaced by sn 75H-2180. |
| 2607 | 2017-01-31 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Installed at Mayberry after calibration in the lab, replacing sn 75H-2176. |
| 2603 | 2017-01-27 | Lab none | Calibration | Lab none | Last calibration: 2016-08-30 AGC=101.86 SDM= DAC1= DAC2= Ambient P=101.78kPa, Tair=24.47C, Tdew=2.69C Zero Air at 1800psi, God CO2 421.22 at 400 Tdewspan=16.00 CO2 zero 0.8648 -> 0.8654 Offset: 1.16ppm CO2 span 1.0164 -> 1.0194 Offset: -1.63ppm H2O zero 0.8859 -> 0.8868 Offset: 5.5ppm H2O span 1.0113 -> 1.0067 Offset: 0.10ppm Notes: Saved calibration file: sn1594_0614_20170127Lab_cal.L7X |
| 2566 | 2016-12-29 | Sherman Wetland Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Sherman Wetland for calibration. Replaced by sn 75H-2180 |
| 2475 | 2016-09-29 | Lab none | Installed | Sherman Wetland Gas Analyzer CO2/H2O | Installed on the Sherman Wetland tower to replace sn 75H-2668 for calibration. |
| 2460 | 2016-09-13 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from EE tower for calibration. Replaced with 75H-2514. Accidentally swapped the LI7500 at EE at this date, had not reached it's official swap period. |
| 2442 | 2016-08-31 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed on the East End tower to replace sn 75H-2150 for calibration. |
| 2450 | 2016-08-30 | Lab none | Calibration | Lab none | Last calibration: 2016-02-22 AGC=101.4 SDM=6 DAC1=- DAC2=- Ambient P=100.12kPa, Tair=24.79C, Tdew=13.72C Zero Air at 400psi, God CO2 421.22 at 400 Tdewspan=16.0 CO2 zero 0.865 -> 0.8648 Offset: -0.70ppm CO2 span 1.0196 -> 1.0164 Offset: 1.68ppm H2O zero 0.8863 -> 0.8859 Offset: -2.6ppm H2O span 1.0139 -> 1.0113 Offset: 0.05ppm Notes: |
| 2311 | 2016-06-06 | West Pond Gas Analyzer CO2/H2O | Removed | Lab none | removed from west pond for calibration, replaced by sn 75H-2176 |
| 2206 | 2016-02-25 | Lab none | Installed | West Pond Gas Analyzer CO2/H2O | Installed on the West Pond tower to replace sn 0065 for calibration |
| 2200 | 2016-02-22 | Lab none | Calibration | Lab none | Last calibration: 2015-11-16 AGC=102.0 SDM=6 DAC1=- DAC2=- Ambient P=100.90kPa, Tair=21.52C, Tdew=9.88C Zero Air at 650psi, God CO2 421.22 at 700 Tdewspan=11.09 CO2 zero 0.8662 -> 0.8650 Offset: -4.98ppm CO2 span 1.0243 -> 1.0196 Offset: 2.58ppm H2O zero 0.8821 -> 0.8863 Offset: 24.5ppm H2O span 1.0212 -> 1.0139 Offset: 0.15ppm Notes: Offsets a little larger than usual - new chemicals last time may have settle more. |
| 2168 | 2016-02-11 | Twitchell Alfalfa Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Alfalfa Tower for calibration. Replaced by sn 75H-2180. |
| 2107 | 2015-11-25 | Lab none | Installed | Twitchell Alfalfa Gas Analyzer CO2/H2O | Installed on the Alfalfa Tower to replace sn 75H-2150 for calibration |
| 2095 | 2015-11-16 | Lab none | Calibration | Lab none | Last calibration: 2015-04-20 AGC=101.9 SDM=1 DAC1=- DAC2=- Ambient P=101.42kPa, Tair=20.60C, Tdew=-2.88C Zero Air at 700psi, God CO2 421.22 at 700 Tdewspan=11.08 CO2 zero 0.8658 -> 0.8662 Offset: 1.43ppm CO2 span 1.0027 -> 1.0243 Offset: -11.42ppm H2O zero 0.8855 -> 0.8821 Offset: -18.0ppm H2O span 0.9935 -> 1.0212 Offset: -0.54ppm Notes: This is the first calibration of this head after it was upgraded to the new 7500A interface and had its chemicals changed. Old coefficients from last Licor calibration loaded were loaded during the upgrade. Last lab calibration coefficients: CO2_zero = 0.8648, CO2_span = 1.0178, H2O_zero = 0.8985, H2O_span = 1.0087. |
| 2046 | 2015-11-10 | Lab none | Upgrade | Lab none | I upgraded this head to a LI-7500A. It got a new plate on the base of the head. The gain was adjusted and the Signal Strength was set to 100%. New chemicals were put in. It needs to run for a few days and then be calibrated. The old 1594 box can be used for spare parts. The 1594 coefficients were entered on the new 7550 box AIU-1557. |
| 1910 | 2015-07-20 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End to be replaced by LI-7500A set. |
| 1796 | 2015-04-23 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed on the Eat End tower to replace sn 0418 for calibration. |
| 1786 | 2015-04-20 | Lab none | Calibration | Lab none | Last calibration: 2014-12-22 AGC=50 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.28kPa, Tair=20.38C, Tdew=12.81C Zero Air at 900psi, God CO2 421.22 at 1200 Tdewspan=15.96 CO2 zero 0.8649 -> 0.8648 Offset: -0.44ppm CO2 span 1.0175 -> 1.0178 Offset: -0.22ppm H2O zero 0.8981 -> 0.8985 Offset: 2.2ppm H2O span 1.1398 -> 1.0087 Offset: 2.68ppm Notes: Relatively large offsets in H2O span, similar to other 7500s calibrated at this time - dew point generator and Vaisala probe agreed with in 0.5C |
| 1776 | 2015-04-08 | Tonzi-Tower | Removed | Lab none | Removed from the Tower site for calibration. Replaced by sn 0035 |
| 1640 | 2014-12-23 | Lab none | Installed | Tonzi-Tower | Installed on the Tonzi Tower to replace sn 0976 for calibration |
| 1647 | 2014-12-22 | Lab none | Calibration | Lab none | Last calibration: 2014-06-10 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=101.45kPa, Tair=22.47C, Tdew=14.26C Zero Air at 1000psi, God CO2 421.22 at 1300 Tdewspan=15.95 CO2 zero 0.8648 -> 0.8649 Offset: 0.67ppm CO2 span 1.0165 -> 1.0175 Offset: -0.62ppm H2O zero 0.8979 -> 0.8981 Offset: 1.1ppm H2O span 1.0501 -> 1.1398 Offset: 0.05ppm Notes: |
| 1578 | 2014-09-30 | Tonzi-Floor | Removed | Lab none | Removed from the Tonzi Floor tower for calibration. Replaced by sn 0042. |
| 1350 | 2014-06-11 | Lab none | Installed | Tonzi-Floor | Installed on the Tonzi Floor to replace sn 0042 for calibration. |
| 1344 | 2014-06-10 | Lab none | Calibration | Lab none | Last calibration: 2014-02-25 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=99.99kPa, Tair=22.71C, Tdew=13.19C Zero Air at 1200psi, God CO2 421.22 at 1500 Tdewspan=15.26 CO2 zero 0.8671 -> 0.8648 Offset: -9.57ppm CO2 span 1.0153 -> 1.0165 Offset: -0.72ppm H2O zero 0.894 -> 0.8979 Offset: 22.5ppm H2O span 0.994 -> 1.0501 Offset: -0.72ppm Notes: CO2 and H2O zero offsets unusually large. Water span kept creeping down - change chemicals next time? |
| 1351 | 2014-06-05 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End for calibration. Replaced by sn 0041 |
| 1220 | 2014-02-25 | Lab none | Calibration | Lab none | Last calibration: 2013-08-20 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.43kPa, Tair=20.21C, Tdew=8.81C Zero air at 1400psi, God CO2 421.22 at 1500 Tdewspan=15.17 CO2 zero 0.8647 -> 0.8671 Offset: 9.68ppm CO2 span 1.0135 -> 1.0153 Offset: -0.87ppm H2O zero 0.897 -> 0.8940 Offset: -16.4ppm H2O span 0.9973 -> 0.9940 Offset: 0.07ppm Notes: Serial pin in external connector may be broken - use internal connector. Relatively large zero offsets. |
| 1219 | 2014-02-25 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed on the East End tower to replace sn 0073 for calibration |
| 1213 | 2013-12-06 | Sherman Island Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Sherman tower for calibration. replaced by sn 418. |
| 1054 | 2013-08-21 | Lab none | Installed | Sherman Island Gas Analyzer CO2/H2O | Installed on the Sherman tower to replace sn 0035 for calibration. |
| 1063 | 2013-08-20 | Lab none | Calibration | Lab none | Last calibration: 2013-04-18
AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.36kPa, Tair=25.60C, Tdew=13.86C Zero Air at 1700psi, God CO2 421.22 at 1600 Tdewspan=15.19 CO2 zero 0.8649 -> 0.8647 Offset: -1.0ppm CO2 span 1.0179 -> 1.0135 Offset: 2.28ppm H2O zero 0.8963 -> 0.8970 Offset: 0.10ppm H2O span 0.9956 -> .9973 Offset: -0.04ppm Notes: |
| 1039 | 2013-07-28 | Tonzi-Floor | Removed | Lab none | Removed from the Tonzi Floor tower for calibration. Replaced by sn0041. |
| 961 | 2013-04-19 | Lab none | Installed | Tonzi-Floor | Swapped on to the Floor Tower to replace sn 0042 for calibration. |
| 960 | 2013-04-18 | Lab none | Calibration | Lab none | Last calibration: 2012-10-23 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=101.52kPa, Tair=23.81C, Tdew=6.77C Zero Air at 1700psi, CO2 in Air 392.3 at 1700 Tdewspan=15.04 CO2 zero 0.8674 -> 0.8649 Offset: -9.87ppm CO2 span 1.0021 -> 1.0179 Offset: -7.8ppm H2O zero 0.8857 -> 0.8963 Offset: 56.4ppm H2O span 0.8959 -> 0.9956 Offset: -2.18ppm Notes: Offsets a little larger than usual |
| 899 | 2013-02-06 | Tonzi-Tower | Removed | Lab none | Removed from the Tonzi Tower for calibration. Replaced by 0035. |
| 815 | 2012-10-24 | Lab none | Installed | Tonzi-Tower | Installed on the Tonzi Tower to swap out 0976 for calibration. |
| 841 | 2012-10-23 | Lab none | Calibration | Lab none | Last calibration: 2012-05-17 AGC=51 SDM=0 DAC1=0-1000 DAC2=10-25 Ambient P=100.79kPa, Tair=22.2C, Tdew=0C dry air at 1800psi, CO2 398.79 at 1600 Tdewspan=15.07 CO2 zero 0.8642 -> 0.8674 Offset: 12.47ppm CO2 span 1.0143 -> 1.0021 Offset: 5.83ppm H2O zero 0.8993 -> 0.8857 Offset: -1.13ppm H2O span 0.9721 -> 0.8959 Offset: 1.82ppm Notes: operated by Siyan Ma |
| 605 | 2012-05-18 | Lab none | Installed | Tonzi-Tower | Swapped onto the to tower to replace sn 1594 for calibration |
| 570 | 2012-05-17 | Lab none | Calibration | Lab none | Last calibration: 2012-01-16 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.19kPa, Tair=23.04C, Tdew=8.4C dry air at 16psi, CO2 436.53 at 1500 Tdewspan=13.7 CO2 zero 0.8649 -> 0.8642 Offset: 0.5ppm CO2 span 1.0139 -> 1.0143 Offset: 0.2ppm H2O zero 0.8951 -> 0.8993 Offset: 2.6ppm H2O span 1.0063 -> 0.9721 Offset: 0.79ppm Notes: installed at Tonzi Tower on 5/18/2012 by Siyan |
| 550 | 2012-04-24 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Mayberry eddy tower. Replaced with LI-7500A sn 75H-2182 |
| 635 | 2012-01-17 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Swapped on to the Mayberry tower. sn 0035 removed for calibration. |
| 497 | 2012-01-16 | Lab none | Calibration | Lab none | Last calibration: 2011-10-17 AGC=51 SDM=7 DAC1=0-1000 DAC2=12-25 Ambient P=101.47kPa, Tair=23.7C, Tdew=14.81C zero air at 450psi, CO2 in air 436.53 at 1750 Tdewspan=14.15 CO2 zero 0.8644 -> 0.8649 Offset: 0.05ppm CO2 span 1.0082 -> 1.0139 Offset: 3.0ppm H2O zero 0.8898 -> 0.8951 Offset: ppm H2O span 0.9721 -> 1.0063 Offset: 0.56ppm Notes: Internal chemicals changed 01-12-2012 |
| 634 | 2012-01-04 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Swapped off of Vaira tower for calibration. Replaced with serial number ??. |
| 433 | 2011-10-18 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | This IRGA was installed on the Vaira tower to replace Frank's IRGA that was installed temporarily. |
| 432 | 2011-10-17 | Lab none | Calibration | Lab none | Last calibration: 2011-07-05 AGC=53 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.62kPa, Tair=29.05C, Tdew=14.17C dry air at 700psi, CO2 410.49 at 2000 Tdewspan=18.3 CO2 zero 0.8654 -> 0.8644 Offset: -4.21ppm CO2 span 1.0098 -> 1.0082 Offset: 0.82ppm H2O zero 0.8901 -> 0.8898 Offset: -0.04ppm H2O span 0.9558 -> 0.9721 Offset: 0.3ppm Notes: removed from Tonzi Tower; calibrated by Siyan |
| 414 | 2011-09-29 | Tonzi-Tower | Removed | Lab none | Removed from Tonzi Tower for calibration - replaced by sn 0065. |
| 383 | 2011-07-06 | Lab none | Installed | Tonzi-Tower | Installed on the Tonzi Tower after laboratory calibration. Replaced sn 0041. |
| 674 | 2011-07-05 | Lab none | Calibration | Lab none | Last calibration: 2011-04-26 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.18kPa, Tair=26.44C, Tdew=12.01C zero air at 1320psi, CO2 597.4 at 40 Tdewspan=16.8 CO2 zero 0.8647 -> 0.8654 Offset: 2.68ppm CO2 span 1.0056 -> 1.0098 Offset: -3.75ppm H2O zero 0.8932 -> 0.8901 Offset: -0.42ppm H2O span 0.9858 -> 0.9558 Offset: 0.8ppm Notes: performed by Siyan, installed at Tonzi Tower on July 6, 2011. |
| 364 | 2011-05-25 | Twitchell Rice Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Twitchell tower for calibration. Replaced by sn 0035. |
| 285 | 2011-01-28 | Lab none | Installed | Twitchell Rice Gas Analyzer CO2/H2O | This sensor was installed on the Twitchell tower to swap out sn 0042 for calibration. |
| 281 | 2011-01-26 | Lab none | Calibration | Lab none | Last cal 2010-10-06, SMD 7 DAC1 H2O 0-1000 DAC2 CO2 10-25
AGC = 51%, T = 24.39 C, P = 101.08 kPa, Td = 1.67 C Zero air = 0.0 1700 psi CO2 = 597.4 ppm <200psi Td = -0.4 C CO2 zero = 0.8645-> 0.8647, offset +0.85 ppm CO2 span = 1.0061 -> 1.0056, offset +0.4 ppm H2O zero = 0.8938 -> 0.8932, offset -3.0 mmol/m3 H2O span = 0.9851 -> 0.9858, offset +0.03 C |
| 270 | 2011-01-19 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Vaira Tower for calibrations. |
| 230 | 2010-10-07 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed on Vaira Tower so sn 0418 could be removed for calibration. |
| 221 | 2010-09-29 | Moffett Field | Removed | Lab none | Removed with portable tower from the zero flux study at Moffett Field. |
| 214 | 2010-09-23 | Lab none | Installed | Moffett Field | This IRGA was installed with a portable tower a Moffett Field for a zero flux study. The center of its path was at 250cm above the ground. |
| 182 | 2010-08-17 | Twitchell Rice Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Twitchell tower for calibration. |
| 120 | 2010-05-28 | Lab none | Installed | Twitchell Rice Gas Analyzer CO2/H2O | Installed on Twitchell tower after fresh lab calibration. |
| 112 | 2010-05-27 | Lab none | Calibration | Lab none | Last cal 2010-02-16, SMD 7 DAC1 H2O 0-1000 DAC2 CO2 10-25
AGC = 51%, T = 18.78C, P = 100.3kPa, Td = 15.6C N2 = 0.0 500psi CO2 = 597.4ppm <300psi CO2 zero = 0.8645-> 0.8653, offset +3.2ppm CO2 span = 1.0041 -> 1.0107, offset -5.3ppm H2O zero = 0.8935 -> 0.8931, offset -0.032mmol/m3 H2O span = 0.9797 -> 0.9943, offset -0.25C |
| 116 | 2010-05-13 | Tonzi-Floor | Removed | Lab none | Swapped off Tonzi floor tower for calibration. |
| 59 | 2010-02-16 | Lab none | Calibration | Lab none | Recalibrated in view of Siyan's comments of partial calibration on 2010-02-09.
Last cal 2010-02-09, Embedded software v3.0.1 AGC = 50%, T = 25.21C, P = 101.04kPa, CO2 = 597.4ppm H2O = 14.5C CO2 zero = 0.8642 -> 0.8645, offset 1.6ppm CO2 span = 1.0537 -> 1.0055, offset ~40ppm H2O zero = 0.8932 -> 0.8935, offset 0.04mmol/m3 H2O span = 0.9935 -> 0.9838, offset 0.2C CO2 tank = 500psi N2 tank = 840psi |
| 58 | 2010-02-09 | Lab none | Calibration | Lab none | Partial calibration by Siyan. CO2 channel would not settle rising slowly. She used the CH4 standard that I had just checked from CO2 with the LI-6262. She also changed the internal chemicals removing factory installed bottles with a bit of each chemical in each. She replaced these with bottles filled by hand, single chemical in each. |
| 80 | 2009-12-04 | Sherman Island Gas Analyzer CO2/H2O 2ndTower | Removed | Lab none | This analyzer was removed for calibration from the secondary tower for the LGR trailer. |
| 57 | 2008-10-14 | Factory | Calibration | Factory | Initial factory calibration:
CO2 A = 1.42489E+02 B = 3.29299E+03 C = 4.12851E+07 D = -1.27868E+10 E = 1.63445E+12 XS = 1.50000E-03 Z = -1.10000E-03 H2O A = 5.15797E+03 B = 3.92313E+06 C = -1.89938E+08 XS = -6.00000E-04 Z = 2.52000E-02 Pressure A0 = 10.571 A1 = 26.036 CO2 Zero = 0.8658 CO2 Span = 1.00270 H2O Zero = 0.8855 H2O Span = 0.9935 |