Equipment and Calibration
Equipment history at Hill Slough| ALL | | Anemometer || Battery Bank || Camera || CO2 Probe || Conductivity Sensor || Data Logger || DO Sensor || Fluorometer || Forced Diffusion || Gas Analyzer || Heat Flux Plate || Interface || Multiplexer || Narrow Band || Net Radiometer || PAR Sensor || pH ORP || Precipitation || Range Finder || RH & Temp || Soil Moisture Probe || Solar Controller || Solar Panel || Water Level || 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 | |||||
| 2022-04-20 | 0035 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 75H-2669 for calibration. |
| 2022-08-25 | 0035 | LI-7500A | Calibration | Lab | Last calibration: 2022-04-19 AGC=99.1 SDM=0 DAC1=- DAC2=- Ambient P=100.3kPa, Tair=20.5C, Tdew=13.9C Zero Air at 300psi, AMP CA04119 524.77 at 1400 Tdewspan=18.0 CO2 zero 0.9372 -> 0.9374 Offset: 0.7ppm CO2 span 1.0167 -> 1.0234 Offset: -4.57ppm H2O zero 0.8983 -> 0.8995 Offset: 7.4ppm H2O span 1.031 -> 1.0334 Offset: -0.05ppm Notes: |
| 2022-08-24 | 0035 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 75H-2176. |
| 2022-08-25 | 0035 | LI-7500A | Calibration | Lab | Last calibration: 2022-04-19 AGC=99.1 SDM=0 DAC1=- DAC2=- Ambient P=100.3kPa, Tair=20.5C, Tdew=13.9C Zero Air at 300psi, AMP CA04119 524.77 at 1400 Tdewspan=18.0 CO2 zero 0.9372 -> 0.9374 Offset: 0.7ppm CO2 span 1.0167 -> 1.0234 Offset: -4.57ppm H2O zero 0.8983 -> 0.8995 Offset: 7.4ppm H2O span 1.031 -> 1.0334 Offset: -0.05ppm Notes: |
| 2024-04-16 | 0035 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 1594 for calibration. |
| 2024-07-19 | 0035 | LI-7500A | Calibration | Lab | Last calibration: 2024-04-15 AGC=100.2 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.4kPa, Tair=23.56C, Tdew=14.79C Zero Air at 1700psi, AMP CA04119 524.77 at 350 Tdewspan=20.00 CO2 zero 0.9377 -> .937 Offset: -3.01ppm CO2 span 1.0226 -> 1.0211 Offset: .76ppm H2O zero 0.8987 -> .8999 Offset: 7.3ppm H2O span 1.0279 -> 1.0373 Offset: -.2ppm Notes: Used "524.65" as CO2 span point in the 7550 software |
| 2024-07-16 | 0035 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 0042. |
| 2024-07-19 | 0035 | LI-7500A | Calibration | Lab | Last calibration: 2024-04-15 AGC=100.2 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.4kPa, Tair=23.56C, Tdew=14.79C Zero Air at 1700psi, AMP CA04119 524.77 at 350 Tdewspan=20.00 CO2 zero 0.9377 -> .937 Offset: -3.01ppm CO2 span 1.0226 -> 1.0211 Offset: .76ppm H2O zero 0.8987 -> .8999 Offset: 7.3ppm H2O span 1.0279 -> 1.0373 Offset: -.2ppm Notes: Used "524.65" as CO2 span point in the 7550 software |
| 2023-04-25 | 0041 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 0042 for calibration. |
| 2023-09-18 | 0041 | LI-7500A | 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. |
| 2023-07-24 | 0041 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 75H-2176. |
| 2023-09-18 | 0041 | LI-7500A | 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. |
| 2022-11-30 | 0042 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 75H-2176 for calibration. |
| 2023-06-13 | 0042 | LI-7500A | Calibration | Lab | Last calibration: 2022-11-29 AGC=100.3 SDM= DAC1= DAC2= AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.7kPa, Tair=19.8C, Tdew=11.0C Zero Air at 1150psi, AMP CA04119 524.77 at 1050 Tdewspan=16.01 CO2 zero 0.9478 -> 0.9486 Offset: 3.0ppm CO2 span 1.0145 -> 1.0184 Offset: -2.67ppm H2O zero 0.8472 -> 0.8461 Offset: -6.8ppm H2O span 1.0267 -> 1.039 Offset: -0.26ppm Notes: Calibrated with the IRGA vertical |
| 2023-04-25 | 0042 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 0041. |
| 2023-06-13 | 0042 | LI-7500A | Calibration | Lab | Last calibration: 2022-11-29 AGC=100.3 SDM= DAC1= DAC2= AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.7kPa, Tair=19.8C, Tdew=11.0C Zero Air at 1150psi, AMP CA04119 524.77 at 1050 Tdewspan=16.01 CO2 zero 0.9478 -> 0.9486 Offset: 3.0ppm CO2 span 1.0145 -> 1.0184 Offset: -2.67ppm H2O zero 0.8472 -> 0.8461 Offset: -6.8ppm H2O span 1.0267 -> 1.039 Offset: -0.26ppm Notes: Calibrated with the IRGA vertical |
| 2024-07-16 | 0042 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 0035 for calibration. |
| 2025-01-07 | 0042 | LI-7500A | Calibration | Lab | Last calibration: 2024-07-12 AGC=101.8 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.9kPa, Tair=26.2C, Tdew=2.35C Zero Air at 900psi, AMP FB04319 514.07 at 400 Tdewspan=20.00 CO2 zero 0.9482 -> .9479 Offset: -.96ppm CO2 span 1.0114 -> 1.0101 Offset: .74ppm H2O zero 0.8455 -> .8463 Offset: 5.4ppm H2O span 1.0264 -> 1.0236 Offset: .06ppm Notes: Used "514.00" as CO2 span point in the 7550 software. Touched up outside with white nail polish and glued the spike mounting disk back on. |
| 2024-11-06 | 0042 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 75H-2176. |
| 2025-01-07 | 0042 | LI-7500A | Calibration | Lab | Last calibration: 2024-07-12 AGC=101.8 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.9kPa, Tair=26.2C, Tdew=2.35C Zero Air at 900psi, AMP FB04319 514.07 at 400 Tdewspan=20.00 CO2 zero 0.9482 -> .9479 Offset: -.96ppm CO2 span 1.0114 -> 1.0101 Offset: .74ppm H2O zero 0.8455 -> .8463 Offset: 5.4ppm H2O span 1.0264 -> 1.0236 Offset: .06ppm Notes: Used "514.00" as CO2 span point in the 7550 software. Touched up outside with white nail polish and glued the spike mounting disk back on. |
| 2023-10-26 | 0418 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 75H-2176 for calibration. |
| 2024-02-09 | 0418 | LI-7500A | Calibration | Lab | Last calibration: 2023-10-23 AGC=101.3 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.68kPa, Tair=23.2C, Tdew=5.6C Zero Air at 475psi, AMP CA04119 524.77 at 700 Tdewspan=20.00 CO2 zero 0.9072 -> .9075 Offset: 1.41ppm CO2 span 1.0066 -> 1.0063 Offset: .14ppm H2O zero 0.9331 -> .9317 Offset: -7.5ppm H2O span 1.0052 -> 1.002 Offset: .08ppm Notes: Vertical orientation. H2O zero only took 10min to stabilize |
| 2024-01-18 | 0418 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 1594. |
| 2024-02-09 | 0418 | LI-7500A | Calibration | Lab | Last calibration: 2023-10-23 AGC=101.3 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.68kPa, Tair=23.2C, Tdew=5.6C Zero Air at 475psi, AMP CA04119 524.77 at 700 Tdewspan=20.00 CO2 zero 0.9072 -> .9075 Offset: 1.41ppm CO2 span 1.0066 -> 1.0063 Offset: .14ppm H2O zero 0.9331 -> .9317 Offset: -7.5ppm H2O span 1.0052 -> 1.002 Offset: .08ppm Notes: Vertical orientation. H2O zero only took 10min to stabilize |
| 2024-01-18 | 1594 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 0418 for calibration. |
| 2024-04-16 | 1594 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 0035. |
| 2021-09-23 | 75H-2176 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 75H-2667 for calibration. |
| 2021-12-16 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2021-09-21 AGC=99 SDM= DAC1= DAC2= Ambient P=100.8kPa, Tair=23.2C, Tdew=7.8C Zero Air at 1075psi, AMP CA04119 524.77 at 1650 Tdewspan=20.00 CO2 zero 0.867 -> .867 Offset: .04ppm CO2 span 1.0023 -> 1.0045 Offset: -1.43ppm H2O zero 0.8526 -> .8546 Offset: 12.2ppm H2O span 0.9091 -> .8249 Offset: -.39ppm Notes: Realized after H2O span that hood was only partly covering lens. Checked the zero again and it was off, so re-did the whole calibration again. These are the coefficients from this second calibration. |
| 2021-12-14 | 75H-2176 | LI-7500A | Removed | Removed from Hill Slough for calibration and brought back to the lab. Replaced by sn 75H-2669. | |
| 2021-12-16 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2021-09-21 AGC=99 SDM= DAC1= DAC2= Ambient P=100.8kPa, Tair=23.2C, Tdew=7.8C Zero Air at 1075psi, AMP CA04119 524.77 at 1650 Tdewspan=20.00 CO2 zero 0.867 -> .867 Offset: .04ppm CO2 span 1.0023 -> 1.0045 Offset: -1.43ppm H2O zero 0.8526 -> .8546 Offset: 12.2ppm H2O span 0.9091 -> .8249 Offset: -.39ppm Notes: Realized after H2O span that hood was only partly covering lens. Checked the zero again and it was off, so re-did the whole calibration again. These are the coefficients from this second calibration. |
| 2022-08-24 | 75H-2176 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 0035 for calibration. |
| 2022-12-05 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2022-08-23 AGC=101.0 SDM=0 DAC1=- DAC2=- Ambient P=100.6kPa, Tair=20.5C, Tdew=9.85C Zero Air at 1700psi, AMP CA04119 524.77 at 1325 Tdewspan=16.00 CO2 zero 0.8678 -> 0.8678 Offset: 0.0ppm CO2 span 1.0008 -> 1.0144 Offset: -9.57ppm H2O zero 0.8537 -> 0.8553 Offset: 9.8ppm H2O span 0.923 -> 0.9281 Offset: -0.12ppm Notes: Large offset in CO2 span. But this largely undoes some similar previous increases. Calibrated at the same time sn 2180 showed a similar CO2 span offset. This calibration was using 7550 box 0674 instead of the AMP loaner but I don't see how that should effect only CO2 span. Going to go with it. |
| 2022-11-30 | 75H-2176 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 0042. |
| 2022-12-05 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2022-08-23 AGC=101.0 SDM=0 DAC1=- DAC2=- Ambient P=100.6kPa, Tair=20.5C, Tdew=9.85C Zero Air at 1700psi, AMP CA04119 524.77 at 1325 Tdewspan=16.00 CO2 zero 0.8678 -> 0.8678 Offset: 0.0ppm CO2 span 1.0008 -> 1.0144 Offset: -9.57ppm H2O zero 0.8537 -> 0.8553 Offset: 9.8ppm H2O span 0.923 -> 0.9281 Offset: -0.12ppm Notes: Large offset in CO2 span. But this largely undoes some similar previous increases. Calibrated at the same time sn 2180 showed a similar CO2 span offset. This calibration was using 7550 box 0674 instead of the AMP loaner but I don't see how that should effect only CO2 span. Going to go with it. |
| 2023-07-24 | 75H-2176 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 0041 for calibration. |
| 2023-11-03 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2023-07-20 AGC=101.1 SDM= DAC1= DAC2= AIU sn AIU-1039, Presure A0=58.372, A1=15.4 Ambient P=100.8kPa, Tair=25.1C, Tdew=9.77C Zero Air at 700psi, AMP CA04119 524.77 at 800 Tdewspan=20.00 CO2 zero 0.868 -> .8678 Offset: -.77ppm CO2 span 1.0095 -> 1.0116 Offset: -1.47ppm H2O zero 0.8525 -> .8552 Offset: 15.8ppm H2O span 0.9124 -> .9231 Offset: -.26ppm Notes: Using loaner AMP 7550 sn AIU-1039. Dewpoint generator had low flow; fixed one of the condenser tubing which had a crack and flow was back to normal. Vertical orientation. |
| 2023-10-26 | 75H-2176 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 0418. |
| 2023-11-03 | 75H-2176 | LI-7500A | Calibration | Lab | Last calibration: 2023-07-20 AGC=101.1 SDM= DAC1= DAC2= AIU sn AIU-1039, Presure A0=58.372, A1=15.4 Ambient P=100.8kPa, Tair=25.1C, Tdew=9.77C Zero Air at 700psi, AMP CA04119 524.77 at 800 Tdewspan=20.00 CO2 zero 0.868 -> .8678 Offset: -.77ppm CO2 span 1.0095 -> 1.0116 Offset: -1.47ppm H2O zero 0.8525 -> .8552 Offset: 15.8ppm H2O span 0.9124 -> .9231 Offset: -.26ppm Notes: Using loaner AMP 7550 sn AIU-1039. Dewpoint generator had low flow; fixed one of the condenser tubing which had a crack and flow was back to normal. Vertical orientation. |
| 2024-11-06 | 75H-2176 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 0042 for calibration. |
| 2025-01-30 | 75H-2176 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 75H-2514. |
| 2021-03-11 | 75H-2180 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough with site setup. Initially installed with an older calibration file, but this will be fixed at the next site visit. |
| 2021-06-15 | 75H-2180 | LI-7500A | Calibration | Lab | Last calibration: 2021-03-08 AGC=99.6 SDM= DAC1= DAC2= Ambient P=100.9kPa, Tair=23.5C, Tdew=10.3C Zero Air at 150psi, AMP CA04119 524.77 at 1800 Tdewspan=16.00 CO2 zero 0.9138 -> .9138 Offset: .14ppm CO2 span 1.0231 -> 1.0281 Offset: -3.25ppm H2O zero 0.8923 -> .8901 Offset: -13.4ppm H2O span 1.0243 -> 1.0164 Offset: .16ppm Notes: |
| 2021-06-09 | 75H-2180 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 75H-2667. |
| 2021-06-15 | 75H-2180 | LI-7500A | Calibration | Lab | Last calibration: 2021-03-08 AGC=99.6 SDM= DAC1= DAC2= Ambient P=100.9kPa, Tair=23.5C, Tdew=10.3C Zero Air at 150psi, AMP CA04119 524.77 at 1800 Tdewspan=16.00 CO2 zero 0.9138 -> .9138 Offset: .14ppm CO2 span 1.0231 -> 1.0281 Offset: -3.25ppm H2O zero 0.8923 -> .8901 Offset: -13.4ppm H2O span 1.0243 -> 1.0164 Offset: .16ppm Notes: |
| 2025-01-30 | 75H-2514 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 75H-2176 for calibration. |
| 2021-06-09 | 75H-2667 | LI-7500A | Installed | Gas Analyzer CO2/H2O | Installed at Hill Slough to replace sn 75H-2180 for calibration. |
| 2021-09-29 | 75H-2667 | LI-7500A | Calibration | Lab | Last calibration: 2021-06-07 AGC=101 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=26.7C, Tdew=11.2C Zero Air at 1475psi, AMP CA04119 524.77 at 1700 Tdewspan=20.00 CO2 zero 0.9422 -> .9411 Offset: -4.00ppm CO2 span 1.0122 -> 1.0174 Offset: -3.75ppm H2O zero 0.8404 -> .8413 Offset: 5.3ppm H2O span 1.0198 -> 1.0281 Offset: -.18ppm Notes: |
| 2021-09-23 | 75H-2667 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration. Replaced by sn 75H-2176. |
| 2021-09-29 | 75H-2667 | LI-7500A | Calibration | Lab | Last calibration: 2021-06-07 AGC=101 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=26.7C, Tdew=11.2C Zero Air at 1475psi, AMP CA04119 524.77 at 1700 Tdewspan=20.00 CO2 zero 0.9422 -> .9411 Offset: -4.00ppm CO2 span 1.0122 -> 1.0174 Offset: -3.75ppm H2O zero 0.8404 -> .8413 Offset: 5.3ppm H2O span 1.0198 -> 1.0281 Offset: -.18ppm Notes: |
| 2021-12-14 | 75H-2669 | LI-7500A | Installed | none | Installed at Hill Slough to replace sn 75H-2176 for calibration. |
| 2022-08-23 | 75H-2669 | LI-7500A | 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 |
| 2022-04-20 | 75H-2669 | LI-7500A | Removed | Gas Analyzer CO2/H2O | Removed from Hill Slough for calibration and brought back to the lab. Replaced by sn 0035. |
| 2022-08-23 | 75H-2669 | LI-7500A | 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 |
| 2024-01-11 | TG1-0155 | LI-7700 | Installed | Gas Analyzer CH4 | Installed at HS to replace sn TG1-0421, which was removed for calibration |
| 2024-08-07 | TG1-0155 | LI-7700 | Calibration | Calibration Location: Hill Slough Last calibration: 2024-01-10 RSSI=81%, Optical RH=4% Ambient P=101.1kPa, Tair=27.2C Zero Air at 1750psi, AMP CA03923 3.3865 at 1900 CH4 Zero Offset: .005ppm CH4 Span Offset: 0.0235ppm Notes: Breezy, not too windy for once. Try to come first thing in the morning to avoid afternoon winds. | |
| 2021-03-11 | TG1-0211 | LI-7700 | Moved | Gas Analyzer CH4 | Installed at Hill Slough with site setup. This sensor was removed from BA because our spare 7700 is currently at the factory. |
| 2021-05-26 | TG1-0211 | LI-7700 | Calibration | Calibration Location: Hill Slough Last calibration: 2020-11-17 RSSI=70%, Optical RH=7% Ambient P=101.4kPa, Tair=22.3C AMP FB04161 at 1150psi, AMP CA04119 4.223 at 2100 CH4 Zero Offset: 0.077ppm CH4 Span Offset: -0.123ppm Notes: Zero gas was an AMP cal gas in a baby tank that we borrowed for the day. Zero offset and span are higher than I usually see on 7700s. | |
| 2021-12-01 | TG1-0211 | LI-7700 | Calibration | Calibration Location: Hill Slough Last calibration: 2021-06-01 RSSI=72%, Optical RH=38% Ambient P=101.6kPa, Tair=16.6C Zero Air at 950psi, AMP CA04396 1.9317 at 1500 CH4 Zero Offset: -.066ppm CH4 Span Offset: .0633ppm Notes: Relatively still day. After calibration, flushed out headspace until optics RH=10% and swapped out desiccant bottle for one with fresh drierite. Zero air tank pressure uncertain--wonky regulator. | |
| 2022-06-08 | TG1-0211 | LI-7700 | Calibration | Calibration Location: Hill Slough Last calibration: 2021-12-01 RSSI=73%, Optical RH=21% Ambient P=100.7kPa, Tair=24.0C Zero Air at 550psi, AMP CA04119 4.2238 at 1525 CH4 Zero Offset: -.002ppm CH4 Span Offset: .0008ppm Notes: Very windy day of course. Did not change drierite or flush headspace with zero air. Changed the top/bottom heater to start at 18:00 instead of at 16:00 for summertime. | |
| 2022-11-30 | TG1-0211 | LI-7700 | Calibration | Calibration Location: Hill Slough Last calibration: 2022-06-08 RSSI=71%, Optical RH=26% Ambient P=101.4kPa, Tair=10.3C Zero Air at 1650psi, AMP CA04396 1.9317 at 1100 CH4 Zero Offset: .005ppm CH4 Span Offset: .0003ppm Notes: After calibration we flushed headspace with zero air until optics RH = 8%. We swapped in fresh drierite. The current thermocouple assembly is missing an o-ring (has putty instead in the o-ring groove), so we swapped in a brand-new thermocouple assembly. | |
| 2023-06-15 | TG1-0211 | LI-7700 | Calibration | Calibration Location: Hill Slough Last calibration: 2022-11-30 RSSI=73%, Optical RH=23% Ambient P=100.9kPa, Tair=17.0C Zero Air at 1200psi, AMP CA04119 4.2238 at 1000 CH4 Zero Offset: -.003ppm CH4 Span Offset: n/a Notes: Windy! Did not set the span because the sensor value would "stabilize" at different number that would vary by >0.25ppm. The "stable" value would change whenever a gust would blow through. | |
| 2023-07-11 | TG1-0211 | LI-7700 | Removed | Gas Analyzer CH4 | Removed from Hill Slough for calibration. Replaced by sn TG1-0421. |
| 2023-07-11 | TG1-0421 | LI-7700 | Installed | Gas Analyzer CH4 | Installed at Hill Slough to replace sn TG1-0211 for calibration. |
| 2024-01-11 | TG1-0421 | LI-7700 | Removed | Gas Analyzer CH4 | Removed from HS and brought back to the lab for calibration. It was replaced by sn TG1-0155 |