Equipment and Calibration History
History for Licor LI-7500A 0041
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 6958 | 2024-10-23 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed at Bouldin Corn to replace sn 0035 for calibration. |
| 6973 | 2024-10-22 | Lab | Calibration | Lab | Last calibration: 2024-06-17 AGC=98.9 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.7kPa, Tair=25.7C, Tdew=11.4C Zero Air at 1050psi, AMP FB04319 514.07 at 800 Tdewspan=20.00 CO2 zero 0.9958 -> .9960 Offset: .54ppm CO2 span 1.0176 -> 1.0142 Offset: 2.36ppm H2O zero 0.8238 -> .8244 Offset: 3.3ppm H2O span 1.0341 -> 1.031 Offset: .08ppm Notes: |
| 6864 | 2024-09-27 | Tonzi Gas Analyzer CO2/H2O Floor | Removed | Lab none | Removed from Tonzi Floor for calibration. Replaced by sn 0065. |
| 6743 | 2024-06-19 | Lab none | Installed | Tonzi Gas Analyzer CO2/H2O Floor | Installed at Tonzi Floor to replace sn 75H-2176 for calibration. |
| 6737 | 2024-06-17 | Lab | Calibration | Lab | Last calibration: 2024-01-03 AGC=100.0 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.1kPa, Tair=20.5C, Tdew=8.8C Zero Air at 1750psi, AMP CA04119 524.77 at 400 Tdewspan=16.0 CO2 zero 0.9963 -> 0.9958 Offset: -1.60ppm CO2 span 1.0217 -> 1.0176 Offset: 2.93ppm H2O zero 0.8245 -> 0.8238 Offset: -3.9ppm H2O span 1.0365 -> 1.0341 Offset: 0.06ppm Notes: Reset SS from 101.5 |
| 6652 | 2024-04-11 | Mayberry Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Mayberry for calibration. Replaced by sn 75H-2667. |
| 6522 | 2024-01-04 | Lab none | Installed | Mayberry Gas Analyzer CO2/H2O | Installed at Mayberry to replace sn 0073 for calibration. |
| 6498 | 2024-01-03 | Lab | Calibration | Lab | Last calibration: 2023-09-18 AGC=100 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.8kPa, Tair=22.7C, Tdew=7.3C Zero Air at 550psi, AMP CA04119 524.77 at 750 Tdewspan=20.0 CO2 zero 0.9965 -> 0.9963 Offset: -0.79ppm CO2 span 1.0192 -> 1.0217 Offset: -1.67ppm H2O zero 0.8236 -> 0.8245 Offset: 5.0ppm H2O span 1.0292 -> 1.0365 Offset: -0.16ppm Notes: H20 took a long time (40min) to stabilize - kept creeping up |
| 6500 | 2024-01-02 | Tonzi Gas Analyzer CO2/H2O Floor | Removed | Lab none | Removed from Tonzi Floor for calibration. Replaced by sn 75H-2667. |
| 6420 | 2023-09-19 | Lab none | Installed | Tonzi Gas Analyzer CO2/H2O Floor | Installed at Tonzi-Floor to replace sn 0073 for calibration. |
| 6407 | 2023-09-18 | Lab | Calibration | Lab | Last calibration: 2023-04-24 AGC=99.9 SDM=0 DAC1=- DAC2=- AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.6kPa, Tair=23.7C, Tdew=14.2C Zero Air at 1750psi, AMP CA04119 524.77 at 1800 Tdewspan=16.0 CO2 zero 0.9968 -> 0.9965 Offset: -1.2ppm CO2 span 1.0202 -> 1.0192 Offset: 0.73ppm H2O zero 0.8222 -> 0.8236 Offset: 8.1ppm H2O span 1.0302 -> 1.0292 Offset: 0.01ppm Notes: Very dirty before calibration. I painted a bunch of dings with white nail polish. |
| 6346 | 2023-07-24 | Hill Slough Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Hill Slough for calibration. Replaced by sn 75H-2176. |
| 6275 | 2023-04-25 | Lab none | Installed | Hill Slough Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 0042 for calibration. |
| 6270 | 2023-04-24 | Lab | Calibration | Lab | Last calibration: 2023-01-05 AGC=100 SDM= DAC1= DAC2= Ambient P=100.4kPa, Tair=21.7C, Tdew=6.85C Zero Air at 1300psi, AMP CA04119 524.77 at 1150 Tdewspan=16.00 CO2 zero 0.9961 -> .9968 Offset: 2.54ppm CO2 span 1.0234 -> 1.0202 Offset: 2.12ppm H2O zero 0.8232 -> .8222 Offset: -5.8ppm H2O span 1.0382 -> 1.0302 Offset: .17ppm Notes: Span point entered as "524.67" for sensor to read ~524.77 after spanning |
| 6256 | 2023-04-11 | Bouldin Corn Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Bouldin Corn for calibration. Replaced by sn 75H-2669. |
| 6157 | 2023-01-06 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed at Bouldin Corn to replace sn 1594 because sn 1594 was not giving any data. |
| 6139 | 2023-01-05 | Lab | Calibration | Lab | Last calibration: 2022-11-28 AGC=100.7 SDM=0 DAC1=- DAC2=- Ambient P=100.1kPa, Tair=17.4C, Tdew=10.1C Zero Air at 1600psi, AMP CA04119 524.77 at 1250 Tdewspan=15.0 CO2 zero 0.9968 -> 0.9961 Offset: -2.3ppm CO2 span 1.0199 -> 1.0234 Offset: -2.37ppm H2O zero 0.8221 -> 0.8232 Offset: 6.5ppm H2O span 1.0304 -> 1.0382 Offset: -0.15ppm Notes: |
| 6124 | 2022-11-28 | Lab | Calibration | Lab | Last calibration: 2022-11-15 AGC=107 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=22.4C, Tdew=2.2C Zero Air at 1750psi, AMP CA04119 524.77 at 1300 Tdewspan=16.00 CO2 zero 0.9998 -> .9968 Offset: -9.82ppm CO2 span 1.0178 -> 1.0199 Offset: -1.37ppm H2O zero 0.8213 -> .8221 Offset: 4.8ppm H2O span 1.0308 -> 1.0304 Offset: 0.00ppm Notes: SS rest from 107 to 100 after calibration. Today's calibration was with our usual box sn AIU-0674. The previous calibration was on a AMP box sn AIU-1039 and I had reset the SS from 93 to 100. Probably some difference in box coefficients that I didn't pay attention to, but the SS should be ok now. |
| 6063 | 2022-11-15 | Lab | Calibration | Lab | Last calibration: 2022-03-30 AGC=93.5 SDM= DAC1= DAC2= Ambient P=101.2kPa, Tair=22.9C, Tdew=.1C Zero Air at 1900psi, AMP CA04119 524.77 at 1350 Tdewspan=20.00 CO2 zero 0.9969 -> .9998 Offset: 9.35ppm CO2 span 1.0189 -> 1.0178 Offset: .23ppm H2O zero 0.8214 -> .8213 Offset: -.5ppm H2O span 1.0337 -> 1.0308 Offset: .07ppm Notes: Reset SS from 93.5 to 100 before calibrating. Used AMP LI-7550 sn AIU-1039. |
| 6000 | 2022-09-15 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End for calibration. Replaced by sn 75H-2667. |
| 5768 | 2022-03-31 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End to replace sn 0065 for calibration. |
| 5754 | 2022-03-30 | Lab | 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. |
| 5752 | 2022-03-23 | Gilbert Tract Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Gilbert Tract for calibration. Replaced by sn 75H-2182. |
| 5646 | 2022-01-02 | Lab none | Installed | Gilbert Tract Gas Analyzer CO2/H2O | Installed at Gilbert Tract to replace sn 0065 for calibration. |
| 5644 | 2021-12-16 | Lab | Calibration | Lab | Last calibration: 2021-09-21 AGC=100.8 SDM= DAC1= DAC2= Ambient P=100.9kPa, Tair=24.0C, Tdew=6.2C Zero Air at 1000psi, AMP CA04119 524.77 at 1650 Tdewspan=20.00 CO2 zero 0.9667 -> .9960 Offset: -2.19ppm CO2 span 1.0145 -> 1.0172 Offset: -1.79ppm H2O zero 0.8224 -> .8227 Offset: 1.5ppm H2O span 1.0228 -> 1.0335 Offset: -.23ppm Notes: |
| 5636 | 2021-12-14 | Bouldin Corn | Removed | Lab none | Removed from Bouldin Corn for calibration and brought back to the lab. Replaced by sn 0042. |
| 5471 | 2021-09-23 | Lab none | Installed | Bouldin Corn Gas Analyzer CO2/H2O | Installed at Bouldin Corn to replace sn 75H-2150 for calibration. |
| 5467 | 2021-09-21 | Lab | 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. |
| 5527 | 2021-09-15 | Gilbert Tract Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Gilbert Tract for calibration. Replaced by sn 0065. |
| 5492 | 2021-09-02 | Sherman Wetland Interface LI-7550 | Moved | Gilbert Tract Interface LI-7550 | Moved from SW to GT with the decomissioning of SW and the beginning of GT |
| 5285 | 2021-05-26 | Lab none | Installed | Sherman Wetland Gas Analyzer CO2/H2O | Installed at Sherman Wetland to replace sn 0035 for calibration. |
| 5268 | 2021-05-25 | Lab | Calibration | Lab | Last calibration: 2020-12-02 AGC=100 SDM=0 DAC1=- DAC2=- Ambient P=100.7kPa, Tair=25.9C, Tdew=10.2C Zero Air at 350psi, AMP CA03923 474.19 at 500 Tdewspan=20.0 CO2 zero 0.9971 -> 0.9966 Offset: -1.8ppm CO2 span 1.019 -> 1.0137 Offset: 3.31ppm H2O zero 0.8209 -> 0.8206 Offset: -2.0ppm H2O span 1.0273 -> 1.0266 Offset: 0.02ppm Notes: I initially forgot to load the previous coefficients file. At that time the signal strength was reading 106.3 and I reset it to 100. Then I remembered to load the previous cal file but only the CO2 and H2O readings changed. It was calibrated with the correct coefficients. |
| 5212 | 2021-03-16 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from East End for calibration and brought back to the lab. Replaced by sn 0065. |
| 5020 | 2020-12-03 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End to replace sn 1594 for calibration. |
| 4994 | 2020-12-02 | Lab | Calibration | Lab | Last calibration: 2020-08-25 AGC=99.7 SDM= DAC1= DAC2= Ambient P=100.7kPa, Tair=24.5C, Tdew=1.8C Zero Air at 450psi, AMP CA4396 408.97 at 300 Tdewspan=20.00 CO2 zero 0.9964 -> .9971 Offset: 2.59ppm CO2 span 1.0173 -> 1.0190 Offset: -1.15ppm H2O zero 0.8216 -> .8209 Offset: -3.9ppm H2O span 1.0323 -> 1.0273 Offset: .11ppm Notes: |
| 5010 | 2020-12-01 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 75H-2180. |
| 4707 | 2020-08-26 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi-Tower to replace sn 75H-2180 for calibration. |
| 4672 | 2020-08-25 | Lab | Calibration | Lab | Last calibration: 2020-05-13 AGC=100.5 SDM=0 DAC1=- DAC2=- Ambient P=100.2kPa, Tair=23.1C, Tdew=14.1C Zero Air at 700psi, AMP CA04396 408.97 at 500 Tdewspan=20.0 CO2 zero 0.9966 -> 0.9964 Offset: -0.7ppm CO2 span 1.018 -> 1.0173 Offset: 0.43ppm H2O zero 0.821 -> 0.8216 Offset: 3.3ppm H2O span 1.0256 -> 1.0323 Offset: -0.05ppm Notes: |
| 4676 | 2020-08-21 | West Pond Gas Analyzer CO2/H2O | Removed | Lab none | Removed from West Pond for calibration. Replaced by sn 75H-2150. |
| 4461 | 2020-05-19 | Lab none | Installed | West Pond Gas Analyzer CO2/H2O | Installed at West Pond to replace sn 0418 for calibration. |
| 4446 | 2020-05-13 | Lab | Calibration | Lab | Last calibration: 2019-11-12 AGC=100.9 SDM= DAC1= DAC2= Ambient P=100.7kPa, Tair=21.6C, Tdew=9.7C Zero Air at 725psi, AMP CA4396 408.97 at 550 Tdewspan=16.00 CO2 zero 0.9968 -> .9966 Offset: -0.6ppm CO2 span 1.0146 -> 1.0180 Offset: -2.16ppm H2O zero 0.8218 -> .8210 Offset: -4.2ppm H2O span 1.0267 -> 1.0256 Offset: 0.02ppm Notes: |
| 4403 | 2020-03-05 | Sherman Wetland-Temp1 Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Sherman Wetland-Temp1 for calibration. Replaced by sn 75H-2514. |
| 4334 | 2020-01-30 | East Pond Gas Analyzer CO2/H2O | Moved | Sherman Wetland-Temp1 Gas Analyzer CO2/H2O | Removed with the decommissioning of the EP tower and installed at the new SW Temporary site 1250m upwind of the Permanent Tower. |
| 4164 | 2019-11-14 | Lab none | Installed | East Pond Gas Analyzer CO2/H2O | Installed at East Pond to replace sn 0035 for calibration. |
| 4148 | 2019-11-12 | Lab none | Calibration | Lab none | Last calibration: 2019-07-24 AGC=99.0 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=27.5C, Tdew=12.8C Zero Air at 950psi, AMP CA4396 408.97 at 700 Tdewspan=16.00 CO2 zero 0.997 -> .9968 Offset: -.88ppm CO2 span 1.0163 -> 1.0146 Offset: .65ppm H2O zero 0.8201 -> .8218 Offset: 9.6ppm H2O span 1.0243 -> 1.0267 Offset: -.05ppm Notes: |
| 4135 | 2019-10-31 | Sherman Wetland Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Sherman Wetland for calibration. Replaced by sn 0073. |
| 4031 | 2019-07-25 | Lab none | Installed | Sherman Wetland Gas Analyzer CO2/H2O | Installed at SW to replace sn 75H-2150, which was brought back to the lab for calibration. |
| 4015 | 2019-07-24 | Lab none | Calibration | Lab none | Last calibration: 2019-01-02
AGC=97.8 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=27.2C, Tdew=12.7C Zero Air at 1000psi, AMP CA4396 408.97 at 800 Tdewspan=20.00 CO2 zero 0.9953 -> .9970 Offset: 5.75ppm CO2 span 1.0194 -> 1.0163 Offset: -1.89ppm H2O zero 0.8248 -> .8201 Offset: -26.5ppm H2O span 1.0312 -> 1.0243 Offset: .16ppm Notes: When SS was 97.8, I reset it to 100.0. Larger H2O zero offset than I expected, but H2O span was ok. Last calibration, the H2O zero offset was a similar magnitude and positive. |
| 3975 | 2019-04-30 | Tonzi-Floor Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Floor tower for calibration. Not replaced because the Floor 7550 box was moved to the Tower to replace the 7550 box there that died. |
| 3833 | 2019-01-04 | Lab none | Installed | Tonzi-Floor | Installed on the Tonzi Floor to replace sn 75H-2514 for calibration. |
| 3823 | 2019-01-02 | Lab none | Calibration | Lab none | Last calibration: 2018-07-03 AGC=98 SDM=0 DAC1=0 DAC2=0 Ambient P=101.2kPa, Tair=20.1C, Tdew=3.7C Zero Air at 1400psi, AMP Air 408.97 at 875 Tdewspan=16.00 CO2 zero 0.9966 -> .9953 Offset: -4.19ppm CO2 span 1.0173 -> 1.0194 Offset: -1.25ppm H2O zero 0.8192 -> .8248 Offset: 34.0ppm H2O span 1.0285 -> 1.0312 Offset: -.07ppm Notes: H2O zero offset larger than I expected, but H2O span seems fine. |
| 3752 | 2018-10-18 | Sherman Barn Gas Analyzer CO2/H2O | Removed | Lab Gas Analyzer CO2/H2O | Removed from Sherman Barn for calibration. Replaced by sn 75H-2669. |
| 3575 | 2018-07-11 | Lab none | Installed | Sherman Barn Gas Analyzer CO2/H2O | Installed at Sherman Barn on the scaffolding frame in the southwest corner of the cow fence. This is the initial set up of the site. |
| 3563 | 2018-07-03 | Lab none | Calibration | Lab none | Last calibration: 2018-03-05 AGC=00 SDM=0 DAC1=0 DAC2=0 Ambient P=100.1kPa, Tair=22.2C, Tdew=12.5C Zero Air at 300psi, LBL Air 408.97 at 1300 Tdewspan=16.00 CO2 zero 0.9972 -> .9966 Offset: -1.94ppm CO2 span 1.0196 -> 1.0173 Offset: 2.0ppm H2O zero 0.8194 -> .8192 Offset: -.9ppm H2O span 1.0267 -> 1.0285 Offset: -.03ppm Notes: Training Robert |
| 3549 | 2018-06-26 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi Tower for calibration. Replaced by sn 75H-2180. |
| 3372 | 2018-03-06 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed on Tonzi Tower to replace sn 75H-2668, which was brought back to the lab for calibration. |
| 3345 | 2018-03-05 | Lab none | Calibration | Lab none | Last calibration: 2018-02-20 AGC=99 SDM=0 DAC1=0 DAC2=0 Ambient P=101.5kPa, Tair=23.4C, Tdew=10.6C Zero Air at 150psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.9971 -> .9972 Offset: .25ppm CO2 span 1.0195 -> 1.0196 Offset: -1.07ppm H2O zero 0.8187 -> .8194 Offset: 4.5ppm H2O span 1.0217 -> 1.0267 Offset: -.1ppm Notes: H2O span checked against our dewpoint generator and Patty's dewpoint generator |
| 3335 | 2018-02-20 | Lab none | Calibration | Lab none | Last calibration: 2017-09-11 AGC=98.4 SDM=0 DAC1=0 DAC2=0 Ambient P=101.1kPa, Tair=23.8C, Tdew=-2.4C Zero Air at 250psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.9969 -> .9971 Offset: .92ppm CO2 span 1.0155 -> 1.0195 Offset: -1.93ppm H2O zero 0.82 -> .8187 Offset: -7.5ppm H2O span 1.0217 -> 1.0217 Offset: 0ppm Notes: I didn't do a H2O span because the sensor's dewpoint measurement was hovering around 2C, and then dropping towards 0C over 30 minutes. There may be a problem with the dewpoint generator. |
| 3237 | 2017-12-18 | East End Gas Analyzer CO2/H2O | Removed | Lab Gas Analyzer CO2/H2O | Removed from East End for calibration. Replaced by sn 75H-2669 |
| 3075 | 2017-09-13 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed at East End to replace sn 75H-2150 for calibration. |
| 3052 | 2017-09-11 | Lab none | Calibration | Lab none | Last calibration: 2017-05-05 AGC=98.4 SDM=0 DAC1=0 DAC2=0 Ambient P=100.2kPa, Tair=26.5C, Tdew=13.0C Zero Air at 900psi, AMP Air 408.97 at 2075 Tdewspan=16.00 CO2 zero 0.9969 -> .9969 Offset: -.01ppm CO2 span 1.0177 -> 1.0155 Offset: 1.05ppm H2O zero 0.821 -> .82 Offset: -5.4ppm H2O span 1.032 -> 1.0217 Offset: .22ppm Notes: |
| 2971 | 2017-08-17 | Tonzi-Tower | Removed | Lab none | Removed from the Tonzi Tower for calibration. Replaced by sn 75H-2182 |
| 2765 | 2017-05-11 | Lab none | Installed | Tonzi-Tower | Installed on the Tower top replacing original 7500 which was moved to temporary mount for inter-comparison. |
| 2744 | 2017-05-05 | Lab none | Calibration | Lab none | Last calibration: 2016-12-05 AGC=99.9 SDM= DAC1= DAC2= Ambient P=100.2kPa, Tair=22.7C, Tdew=9.22C Zero Air at 1600psi, LBL Air 513.22 at 400 Tdewspan=16.00 CO2 zero 1.0004 -> .9969 Offset: -11.7ppm CO2 span 1.0124 -> 1.0177 Offset: -3.72ppm H2O zero 0.8255 -> .8210 Offset: -25.0ppm H2O span 1 -> 1.0320 Offset: -.69ppm Notes: First calibration since upgrade from LI-7500 to LI-7500A |
| 2741 | 2017-05-03 | Lab none | Upgrade | Lab none | Upgraded to 7500A with the 7500-600 LI-7500 Head Upgrade kit from Licor. I put in new bottom assembly and greased o-ring, screws and greased o-rings, and two chemical bottles. I also adjusted the potentiometer until the waveform displayed about 15,000 counts for the minimum and 55,000 counts for the maximum(Diagnostics icon > Waveform tab). After the upgrade, I attached this sensor to a LI-7550 Analyzer Interface Unit and manually input the CO2 coefficients (A, B, C, D, E, Z, XS) and H2O coefficients (A, B, C, ZX, S). I also updated the Signal Strength coefficients (B = 1.6, C = 3.2) and reset the signal strength (Calibration icon > Signal Strength tab > Reset Signal Strength). |
| 2697 | 2017-04-10 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Vaira for calibration. Replaced by sn 0073. |
| 2541 | 2016-12-07 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed on the Vaira Tower to replace sn 0042 for calibration. |
| 2532 | 2016-12-05 | Lab none | Calibration | Lab none | Last calibration: 2016-05-05 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.66kPa, Tair=20.72C, Tdew=8.12C Zero Air at 400psi, God CO2 421.22 at 450 Tdewspan=16.00 CO2 zero 1.0002 -> 1.0004 Offset: 0.0ppm CO2 span 1.0128 -> 1.0124 Offset: 0.36ppm H2O zero 0.8257 -> 0.8255 Offset: -1.0ppm H2O span 1.0037 -> 1.0000 Offset: -0.01ppm Notes: Had trouble connecting sensor to software at first. Software froze in middle so re-started software to do calibration. |
| 2429 | 2016-08-23 | Tonzi-Tower | Removed | Lab none | Removed from the Tonzi Tower for calibration, replaced by sn 0418 |
| 2266 | 2016-05-10 | Lab none | Installed | Tonzi-Tower | Installed on the Tonzi Tower to replace sn 0418 for calibration. |
| 2259 | 2016-05-05 | Lab none | Calibration | Lab none | Last calibration: 2015-10-28 AGC=50 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.03kPa, Tair=19.99C, Tdew=9.10C Zero Air at 600psi, God CO2 421.22 at 500 Tdewspan=11.09 CO2 zero 1.0004 -> 1.0002 Offset: -0.7ppm CO2 span 1.0107 -> 1.0128 Offset: -1.12ppm H2O zero 0.8247 -> 0.8257 Offset: 5.0ppm H2O span 0.8836 -> 1.0037 Offset: -2.5ppm Notes: Large offset in H2O span. I think a mistake was made last time when the dew point was set to the H2O mmol/mol value. |
| 2172 | 2016-02-23 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Vaira tower for calibration. Replaced by sn 0976. |
| 2040 | 2015-11-03 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed on the Vaira Tower to replace sn 0976 for calibration. |
| 1984 | 2015-10-28 | Lab none | Calibration | Lab none | Last calibration: 2015-04-20 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.68kPa, Tair=21.33C, Tdew=13.66C Zero Air at 750psi, God CO2 421.22 at 750 Tdewspan=11.08 CO2 zero 1.0002 -> 1.0004 Offset: 0.68ppm CO2 span 1.0115 -> 1.0107 Offset: 0.38ppm H2O zero 0.8243 -> 0.8247 Offset: 2.3ppm H2O span 0.9991 -> 0.8836 Offset: 1.96ppm Notes: |
| 1914 | 2015-07-20 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Vaira for calibration. Replaced by sn 0976 |
| 1798 | 2015-04-21 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed on the Vaira tower to replace sn 0976 for calibration. |
| 1785 | 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=100.14kPa, Tair=20.41C, Tdew=14.44C Zero Air at 900psi, God CO2 421.22 at 1200 Tdewspan=15.96 CO2 zero 1.0008 -> 1.0002 Offset: -2.0ppm CO2 span 1.0116 -> 1.0115 Offset: -0.02ppm H2O zero 0.8242 -> 0.8243 Offset: 0.8ppm H2O span 1.1234 -> 0.9991 Offset: 2.62ppm Notes: External serial port not working. Relatively large offset in H2O span, similar to other 7500s calibrated at this time - dew point generator and Vaisala probe agreed with in 0.5C |
| 1774 | 2015-04-08 | Tonzi-Floor | Removed | Lab none | Removed from the Floor site for calibration. Replaced by sn 0073 |
| 1642 | 2014-12-23 | Lab none | Installed | Tonzi-Floor | Installed on the Tonzi Floor to replace sn 0042 for calibration |
| 1648 | 2014-12-22 | Lab none | Calibration | Lab none | Last calibration: 2014-06-04 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=101.23kPa, Tair=22.30C, Tdew=13.20C Zero Air at 1000psi, God CO2 421.22 at 1300 Tdewspan=15.95 CO2 zero 1.0009 -> 1.0008 Offset: -0.1ppm CO2 span 1.0101 -> 1.0116 Offset: -0.82ppm H2O zero 0.8235 -> 0.8242 Offset: 4.1ppm H2O span 1.0013 -> 1.1234 Offset: -2.69ppm Notes: Dew point drifting up after calibration - might have been dew point generator. |
| 1571 | 2014-09-25 | East End Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the East End tower for calibration. Replaced by sn 0073. |
| 1337 | 2014-06-05 | Lab none | Installed | East End Gas Analyzer CO2/H2O | Installed on the East End tower to replace sn 1594 for calibration. |
| 1332 | 2014-06-04 | Lab none | Calibration | Lab none | Last calibration: 2013-11-20 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.11kPa, Tair=21.17C, Tdew=11.50C Zero Air at 1250psi, God CO2 421.22 at 1500 Tdewspan=15.27 CO2 zero 0.9984 -> 1.0009 Offset: 8.18ppm CO2 span 1.0139 -> 1.0101 Offset: 2.03ppm H2O zero 0.8224 -> 0.8235 Offset: 6.5ppm H2O span 0.9991 -> 1.0013 Offset: -0.05ppm Notes: Both the CO2 and H2O span seemed a little less stable that usual - CO2 +-0.2ppm, H2O +-0.5C |
| 1250 | 2014-03-18 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Vaira tower for calibration. Replaced by sn 0035. |
| 1147 | 2013-11-27 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed on the Vaira tower to replace sn 0418 for calibration |
| 1141 | 2013-11-20 | Lab none | Calibration | Lab none | Last calibration: 2013-07-09 AGC=48 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.18kPa, Tair=19.09C, Tdew=13.55C Zero air at 1500psi, God CO2 421.22 at 1550 Tdewspan=15.18 CO2 zero 1.001 -> 0.9984 Offset: -8.66ppm CO2 span 1.0086 -> 1.0139 Offset: -3.07ppm H2O zero 0.8217 -> 0.8224 Offset: 4.0ppm H2O span 1 -> 0.9991 Offset: 0.01ppm Notes: |
| 1099 | 2013-11-07 | Tonzi-Floor | Removed | Lab none | Removed from the Floor Tower for calibration. Replaced by sn 0976. |
| 1038 | 2013-07-28 | Lab none | Installed | Tonzi-Floor | Installed on the Tonzi Floor tower to replace sn1594 for calibration. |
| 1029 | 2013-07-09 | Lab none | Calibration | Lab none | Last calibration: 2013-01-29 AGC=52 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.55kPa, Tair=21.92C, Tdew=11.81C Zero Air at 1650psi, God CO2 421.22 at 1600 Tdewspan=15.19 CO2 zero 1.0012 -> 1.0010 Offset: -0.55ppm CO2 span 1.008 -> 1.0086 Offset: -0.32ppm H2O zero 0.822 -> 0.8217 Offset: -1.5ppm H2O span 0.998 -> 1.0000 Offset: -0.04ppm Notes: |
| 974 | 2013-04-26 | Sherman Island Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Sherman tower for calibration. Replaced by sn 0035 |
| 889 | 2013-01-30 | Lab none | Installed | Sherman Island Gas Analyzer CO2/H2O | Installed on the Sherman tower to replace sn 0035 for calibration. |
| 884 | 2013-01-29 | Lab none | Calibration | Lab none | Last calibration: 2012-07-24 AGC=52 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=101.65kPa, Tair=25.10C, Tdew=4.63C Zero air at 1700psi, CO2 in air 392.3 at 2000 Tdewspan=15.07 CO2 zero 1.0008 -> 1.0012 Offset: 1.35ppm CO2 span 1.0084 -> 1.0080 Offset: 0.3ppm H2O zero 0.8201 -> 0.8220 Offset: 10.8ppm H2O span 0.9947 -> 0.9980 Offset: 0.0ppm Notes: Very tight correspondence with last calibration |
| 814 | 2012-10-24 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Vaira Tower for calibration. Replaced by 0418 |
| 1200 | 2012-07-25 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed on the Vaira Tower to replace sn 0042 for calibration. |
| 681 | 2012-07-24 | Lab none | Calibration | Lab none | Last calibration: 2011-08-24 AGC=52 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.3kPa, Tair=25.6C, Tdew=11.5C dry air at 1900psi, CO2 436.53 at 1500 Tdewspan=15.0 CO2 zero 1.0011 -> 1.0008 Offset: 0.51ppm CO2 span 1.006 -> 1.0084 Offset: 0.3ppm H2O zero 0.8201 -> 0.8201 Offset: -0.33ppm H2O span 0.9714 -> 0.9947 Offset: 3.35ppm Notes: calibrated by Siyan |
| 642 | 2012-06-07 | Sherman Island Gas Analyzer CO2/H2O | Removed | Lab none | Swapped off the Sherman tower for calibration. Replaced by sn 0418. |
| 644 | 2012-03-06 | Lab none | Installed | Sherman Island Gas Analyzer CO2/H2O | Installed to replace the malfunctioning LI-7500 removed last week. |
| 643 | 2012-01-25 | Twitchell Rice Gas Analyzer CO2/H2O | Removed | Lab none | Swapped off of the Twitchell Tower for calibration. Replaced by cn 0065. |
| 407 | 2011-08-25 | Lab none | Installed | Twitchell Rice Gas Analyzer CO2/H2O | Installed on the Twitchell tower to replace sn 0035 for calibration. |
| 671 | 2011-08-24 | Lab none | Calibration | Lab none | Last calibration: 2011-02-24 AGC=53 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.29kPa, Tair=26.05C, Tdew=14.46C Zero Air at 900psi, CO2 in Air 405.85 at 1800 Tdewspan=19.4 CO2 zero 1.002 -> 1.0011 Offset: -2.9ppm CO2 span 1.0025 -> 1.006 Offset: -1.81ppm H2O zero 0.817 -> 0.8201 Offset: 18.3ppm H2O span 0.9984 -> 0.9714 Offset: 0.74ppm Notes: Performed by Joe and Sara |
| 382 | 2011-07-06 | Tonzi-Tower | Removed | Lab none | Removed from the Tonzi Tower for calibration. Replaced by sn 1594. |
| 1201 | 2011-03-30 | Lab none | Installed | Tonzi-Tower | Installed on the Tonzi Tower to replace sn 0976 for calibration |
| 332 | 2011-03-07 | Factory | Repair | Lab none | Returned from repair at Licor. The lamp and the detector were bad and replaced. Licor did a full calibration resulting in new internal coefficients:
CO2 H2O A=1.32620e2 A=4.86118e3 B=6.20216e3 B=3.14261e6 C=3.33744e7 C=1.38738e8 D=-9.37277e9 E=1.14146e12 XS=0.0006 XS=-0.0010 Z=1.60000e-3 Z=1.18000e2 Pressure A0=10.697 A1=26.036 CO2 zero = 1.0020, span = 1.0025 (@ 611ppm) H2O zero = 0.8170, span = 0.9984 (@ 12C) |
| 333 | 2011-01-24 | Lab none | Repair | Factory | Sent to licor for repair. No signal, Max AGC. |
| 274 | 2011-01-05 | Tonzi-Floor | Removed | Lab none | This sensor was removed from the Tonzi Floor tower for calibration. Replaced by sn 0035. |
| 227 | 2010-10-07 | Lab none | Installed | Tonzi-Floor | Installed on the Floor tower to swap out sn 0042 for calibration. |
| 183 | 2010-08-17 | Sherman Island Gas Analyzer CO2/H2O | Removed | Lab none | Removed from the Sherman Tower for calibration in the lab. |
| 121 | 2010-05-28 | Lab none | Installed | Sherman Island Gas Analyzer CO2/H2O | Installed on Sherman tower after fresh lab calibration. |
| 113 | 2010-05-27 | Lab none | Calibration | Lab none | Last cal 2010-02-09, SMD 7 DAC1 H2O 0-1000 DAC2 CO2 10-25
AGC = 54%, T = 18.76C, P = 100.02kPa, Td = 15.4C N2 = 0.0 500psi CO2 = 597.4ppm <300psi CO2 zero = 0.9881-> 0.9882, offset +0.3ppm CO2 span = 1.0022-> 0.9984, offset +3.1ppm H2O zero = 0.7395-> 0.7385, offset -0.095mmol/m3 H2O span = 0.9928-> 0.9804, offset +0.35C |
| 1202 | 2009-12-14 | Lab none | Calibration | Lab none | Last calibration: 2009-09-15 AGC=55 SDM= DAC1= DAC2= Ambient P=kPa, Tair=C, Tdew=C at psi, at Tdewspan= CO2 zero 0.9882 -> 0.8450 Offset: ppm CO2 span 0.9972 -> 1.0000 Offset: ppm H2O zero 0.7360 -> 1.107 Offset: ppm H2O span 1.0197 -> 0.9920 Offset: ppm Notes: Embedded software v3.0.0. Not a good report - take with a grain of salt. |
| 23 | 2009-12-14 | Lab none | Upgrade | Lab none | Last cal Sep 15, 2009
AGC = 55, Embedded software v3.0.0 upgraded to v3.0.1 Internal chemicals changed. |
| 24 | 2009-12-09 | Twitchell Rice Gas Analyzer CO2/H2O | Removed | Lab none | Removed for the Twitchell tower and returned to the lab. |
| 1473 | 2009-07-31 | Lab none | Installed | Twitchell Rice Gas Analyzer CO2/H2O | Installed at Rice. Can't figure out which sn it replaced though.... |
| 85 | 2009-04-02 | Lab none | Calibration | Lab none | AGC = 56%, T = 24.1C, P = 100.0kPa
N2 tank 1200psi, CO2 tank 1400psi 344.95ppm CO2 Last Calibration 1/7/2009 CO2 zero = 1.0024 -> 1.0026 CO2 span = 0.9868 -> 0.9872 H2O zero = 1.1031 -> 1.0377 H2O span = 0.7331 -> 0.7316 |
| 4007 | 2009-01-08 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed on the Vaira tower to replace sn 0073 for calibration |
| 6616 | 2004-04-07 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed at Vaira to replace sn 0065 for calibration |
| 4925 | 2003-10-02 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0418. |
| 4916 | 2003-06-20 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0035. |
| 4904 | 2003-05-09 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0035. |
| 4899 | 2003-03-17 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi-Tower to replace sn 0035 for calibration. |
| 4881 | 2002-12-23 | Lab none | Installed | Tonzi-Floor Gas Analyzer CO2/H2O | Installed at Tonzi-Floor to replace sn 0073 for calibration. |
| 4810 | 2002-11-05 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0035. |
| 4873 | 2002-09-20 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi-Tower to replace sn 0035 for calibration. |
| 4868 | 2002-08-15 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0035. |
| 4847 | 2002-07-11 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi-Tower to replace sn 0035 for calibration. |
| 4884 | 2002-06-06 | Tonzi-Tower Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0035. |
| 4834 | 2002-04-18 | Lab none | Installed | Tonzi-Tower Gas Analyzer CO2/H2O | Installed at Tonzi/Vaira to replace sn 0065 for calibration. |
| 4819 | 2002-02-28 | Tonzi-Floor Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Floor for calibration. Replaced by sn 0042. |
| 3809 | 2002-02-08 | Lab none | Installed | Tonzi-Floor | Installed on the Tonzi Tower to replace sn 0035 for calibration |
| 4773 | 2001-11-10 | Vaira Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Tower for calibration. Replaced by sn 0042. |
| 4769 | 2001-08-17 | Tonzi-Floor Gas Analyzer CO2/H2O | Removed | Lab none | Removed from Tonzi-Floor for calibration. Replaced by sn 0073. |
| 4768 | 2001-07-19 | Lab none | Installed | Tonzi-Floor Gas Analyzer CO2/H2O | Installed on Tonzi Tower to replace sn 0035 for calibration |
| 6614 | 2001-03-22 | Lab none | Installed | Vaira Gas Analyzer CO2/H2O | Installed at Vaira to replace sn 0065 for calibration. |