Equipment and Calibration History
History for Licor LI-7700 TG1-0223
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 6805 | 2024-08-07 | Gilbert Tract | Calibration | Gilbert Tract | Calibration Location: Gilbert Tract
Last calibration: 2024-01-11 RSSI=85%, Optical RH=7% Ambient P=100.5kPa, Tair=30.7C Zero Air at 1600psi, AMP CA03923 3.3865 at 1800 CH4 Zero Offset: -.011ppm CH4 Span Offset: -.0085ppm Notes: Warm, breezy |
| 6528 | 2024-01-11 | Gilbert Tract | Calibration | Gilbert Tract | Calibration Location: Gilbert Tract Last calibration: 2023-08-07 RSSI=82%, Optical RH=3% Ambient P=101.8kPa, Tair=9.7C Zero Air at 1850psi, AMP CA03923 3.3865 at 1750 CH4 Zero Offset: .002ppm CH4 Span Offset: -.0225ppm Notes: Breezy |
| 6363 | 2023-08-08 | Lab none | Installed | Gilbert Tract Gas Analyzer CH4 | Installed at Gilbert Tract to replace sn TG1-0424 for calibration. |
| 6356 | 2023-08-07 | Lab | Calibration | Lab | Calibration Location: Lab Last calibration: 2023-01-18 RSSI=83%, Optical RH=28% Ambient P=100.1kPa, Tair=27.2C Zero Air at 900psi, AMP CA04119 4.2238 at 900 CH4 Zero Offset: -.003ppm CH4 Span Offset: -.0318ppm Notes: After calibration, flushed optics headspace with zero air until optics RH=11%. Removed used silica desiccant and put in fresh drierite. |
| 6352 | 2023-07-24 | Mayberry Gas Analyzer CH4 | Removed | Lab none | Removed from Mayberry for calibration. Replaced by sn TG1-0211. |
| 6170 | 2023-01-18 | Mayberry | Calibration | Mayberry | Calibration Location: Mayberry Last calibration: 2022-06-07 RSSI=84%, Optical RH=15% Ambient P=101.9kPa, Tair=9.9C Zero Air at 1500psi, AMP CA04396 1.9317 at 1350 CH4 Zero Offset: .011ppm CH4 Span Offset: .0093ppm Notes: Did not flush headspace or change desiccant afterwards |
| 6129 | 2022-12-13 | Mayberry Gas Analyzer CH4 | Maintenance | Mayberry Gas Analyzer CH4 | The humidity reading was 31%. I swapped the desiccant bottle refilling it with silica gel desiccant. The humidity didn't change and hopefully will go down. Swap with regular dri-rite at calibration next time. |
| 5914 | 2022-06-08 | Lab none | Installed | Mayberry Gas Analyzer CH4 | Installed at MB after attaching a new fuse holder and fuse. This sensor was calibrated in the lab yesterday. |
| 5888 | 2022-06-07 | Lab none | Calibration | Lab none | Calibration Location: Lab
Last calibration: 2021-12-03 RSSI=76%, Optical RH=29% Ambient P=100.0kPa, Tair=21.7C Zero Air at 625psi, AMP CA04119 4.2238 at 1600 CH4 Zero Offset: -.037ppm CH4 Span Offset: .0392ppm Notes: Before this calibration, I replaced fuse and fuse holder. I added some grease to the large o-ring around the base (Licor grease in the small plastic container) before reassembling everything. I followed Joe's advice to use longer helper screws help get the bottom to seat all the way in, and then replace those "helper" screws with the original screws with o-rings. During calibration for the span, I realized at 16:10 that the top heater had been on since 16:00. Probably the zero was calibrated while the heater was on. The span seemed stable from 16:12-16:18 and I don't think turning the heater off really affected it. I spanned the sensor at 16:18. After calibration, I pumped zero air into the headspace until optics RH=10%. I swapped out the old purple desiccant for a bottle of fresh blue desiccant. I added a bit of grease to the desiccant plug as well. |
| 5880 | 2022-05-27 | Mayberry Gas Analyzer CH4 | Removed | Lab none | Removed from Mayberry because water got inside and rotted out the fuse on the bottom of the can. Same as WP a few weeks ago. |
| 5604 | 2021-12-01 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: Mayberry
Last calibration: 2021-06-01 RSSI=85%, Optical RH=22% Ambient P=101.8kPa, Tair=9.3C Zero Air at 600psi, AMP CA04396 1.9317 at 1650 CH4 Zero Offset: 0.034ppm CH4 Span Offset: -0.0157ppm Notes: A lot of fog in the air so it was hard for RSSI to go >60 even when clean. The RSSI increased to 85 when we put the hood on. Relatively still day. After calibration, we dried down the sensor headspace with zero air until optics RH=10%. We swapped out the old drierite for fresh drierite. |
| 5591 | 2021-11-23 | Mayberry Gas Analyzer CH4 | Upgrade | Mayberry Gas Analyzer CH4 | Upgraded the firmware from v1.0.27 to v1.0.29. The sensor restarted succesfully and all seems well. |
| 5276 | 2021-05-26 | Mayberry | Calibration | Mayberry | Calibration Location: Mayberry
Last calibration: 2020-11-16 RSSI=77%, Optical RH=25% Ambient P=101.0kPa, Tair=27.8C AMP FB03864 at 1200psi, AMP CA04119 4.223 at 2000 CH4 Zero Offset: -0.028ppm CH4 Span Offset: -0.003ppm Notes: Breezy day. Zero gas was an AMP cal gas in a baby tank that we borrowed for the day. After the calibration, we used the zero air to flush the headspace until optics RH = 10%. The drierite was purple, so we swapped in a new bottle with fresh drierite. |
| 4945 | 2020-11-12 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: Mayberry
Last calibration: 2020-05-22 RSSI=78%, Optical RH=26% Ambient P=101.6kPa, Tair=11.6C Zero Air at 700psi, AMP CA3923 3.121 at 700 CH4 Zero Offset: 0.011ppm CH4 Span Offset: 0.002ppm Notes: Still day. Swapped out pink silica gel and put in fresh drierite in the optics chem bottle. Used zero air to flush head space down to 9% RH. Optics RH was 12% when we left the site. |
| 4486 | 2020-05-21 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: Mayberry
Last calibration: 2019-10-22 RSSI=83%, Optical RH=26% Ambient P=101.2kPa, Tair=21.8C Zero Air at 750psi, AMP CA3923 3.121 at 800 CH4 Zero Offset: 0.004ppm CH4 Span Offset: -0.003ppm Notes: Breezy day. Swapped optics drierite after calibration and used cal gas to dry head space. New optics RH was 9%. |
| 4118 | 2019-10-22 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: Mayberry Last calibration: 2019-04-25 RSSI=84.7%, Optical RH=28% Ambient P=101.6kPa, Tair=29.7C Zero Air at 1200psi, AMP CA03923 3.121 at 1200 CH4 Zero Offset: -0.075ppm CH4 Span Offset: 0.007ppm Notes: Slightly larger zero offset but span seems good. After calibration swapped optics desiccant and dried head space with cal gas. New RH 11%. |
| 3949 | 2019-04-25 | Mayberry Gas Analyzer CH4 | Upgrade | Mayberry Gas Analyzer CH4 | The thermocouple module was broken so we swapped it for a new one. The LI-7700 firmware was upgraded from v1.0.21 to v1.0.27 mostly minor bug fixes see change log https://www.licor.com/env/support/LI-7700/topics/change-log.html |
| 3936 | 2019-04-25 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: MB
Last calibration: 2018-10-26 RSSI=80%, Optical RH=12% Ambient P=100.9kPa, Tair=26C Zero Air at 1600psi, AMP CA3923 3.121 at 1600 CH4 Zero Offset: 0.013ppm CH4 Span Offset: 0.015ppm Notes: TC module swapped before calibration; breezy day |
| 3759 | 2018-10-25 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: MB
Last calibration: 2018-04-25 RSSI=81%, Optical RH=8% Ambient P=101.6kPa, Tair=20.5C Zero Air at 2000psi, AMP Air 3.121 at 2100 CH4 Zero Offset: 0.021ppm CH4 Span Offset: 0.018ppm Notes: Calm day |
| 3448 | 2018-05-03 | Lab none | Installed | Mayberry Gas Analyzer CH4 | Installed at MB to replace sn TG1-0423, which was brought back to the lab for calibration. |
| 3424 | 2018-04-25 | Lab none | Calibration | Lab none | Calibration Location: Lab Last calibration: 2017-10-16 RSSI=84%, Optical RH=3% Ambient P=100.4kPa, Tair=22.3C Zero Air at 400psi, LBL Air 1.9497 at 1400 CH4 Zero Offset: 0.013ppm CH4 Span Offset: -0.0027ppm Notes: |
| 3413 | 2018-04-19 | Bouldin Alfalfa Gas Analyzer CH4 | Removed | Lab Gas Analyzer CH4 | Removed from Bouldin Alfalfa for calibration. Replaced by sn TG1-0424 |
| 3184 | 2017-10-19 | Lab none | Installed | Bouldin Alfalfa Gas Analyzer CH4 | Installed at BA (now that the East End temporary towers are done, we have an available LI-7700 to put up here) |
| 3145 | 2017-10-16 | Lab none | Calibration | Lab none | Calibration Location: Lab Last calibration: 2017-03-23 RSSI=79.2%, Optical RH=2% Ambient P=100.5kPa, Tair=28.7C Zero Air at 500psi, AMP Air 1.9497 at 2000 CH4 Zero Offset: -0.015ppm CH4 Span Offset: -0.0177ppm Notes: |
| 3149 | 2017-10-13 | West Pond Gas Analyzer CH4 | Removed | Lab none | Removed from West Pond for calibration. Replaced by sn TG1-0424 |
| 2671 | 2017-03-23 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2016-10-11 RSSI=86.2%, Optical RH=16% Ambient P=102.0kPa, Tair=17.6C Zero Air at 750psi, Ameriflux CH4 4.0304 at 1100 CH4 Zero Offset: -0.041ppm CH4 Span Offset: -0.0251ppm Notes: Changed dessicant and optics RH = 27%. Flushed head with span gas and optics RH dropped to 16%. |
| 2492 | 2016-10-11 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: west pond
Last calibration: 2016-04-13 RSSI=71%, Optical RH=27% Ambient P=101.3kPa, Tair=22C zero air at 700psi, AMP CH4 4.030 at 1200 CH4 Zero Offset: 0.001ppm CH4 Span Offset: -0.006ppm Notes: Breezy. |
| 2235 | 2016-04-13 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2015-09-30 RSSI=84.2%, Optical RH=24% Ambient P=101.74kPa, Tair=22.97C Zero Air at 900psi, AMP CH4 1.9966 at 700 CH4 Zero Offset: 0.011ppm CH4 Span Offset: 0.001ppm Notes: |
| 1950 | 2015-09-30 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2015-03-24 RSSI=66.5%, Optical RH=25% Ambient P=101.3kPa, Tair=18.1C Zero Air at 1050psi, AMP CH4 1.9966 at 1500 CH4 Zero Offset: 0.013ppm CH4 Span Offset: -0.0066ppm Notes: light, sporadic rain - no wind |
| 1763 | 2015-03-24 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2014-09-10 RSSI=80%, Optical RH=19% Ambient P=102.3kPa, Tair=20.8C Zero air at 1200psi, 2nd CH4 4.995 at 600 CH4 Zero Offset: -0.001ppm CH4 Span Offset: 0.08ppm Notes: |
| 1545 | 2014-09-10 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2014-03-07 RSSI=82%, Optical RH=12% Ambient P=100.88kPa, Tair=31.5C Zero Air at 1400psi, 2nd CH4 4.995 at 750 CH4 Zero Offset: 0.025ppm CH4 Span Offset: -0.085ppm Notes: Very hot day with no wind. Span offset a little large. |
| 1229 | 2014-03-07 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond
Last calibration: 2013-08-21 RSSI=73.8%, Optical RH=7% Ambient P=102.4kPa, Tair=20.7C Zero Air at 1600psi, 2nd CH4 4.995 at 1100 CH4 Zero Offset: 0.01ppm CH4 Span Offset: 0.001ppm Notes: Calibrated by Cove and Sara after firmware upgrade to v 1.0.21. Windy day. Windy day. |
| 1050 | 2013-08-21 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2013-02-19 RSSI=78%, Optical RH=3% Ambient P=101.1kPa, Tair=21.8C Zero Air at 1700psi, CH4 in air 4.995 at 1300 CH4 Zero Offset: 0.01ppm CH4 Span Offset: 0.013ppm Notes: |
| 931 | 2013-02-19 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2012-09-06 RSSI=66.8%, Optical RH=1.0% Ambient P=101.98kPa, Tair=10.8C Zero Air at 1800psi, 2nd CH4 in Air 4.982 at 1300 CH4 Zero Offset: 0.016ppm CH4 Span Offset: 0.006ppm Notes: |
| 839 | 2012-09-06 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: RSSI=69%, Optical RH=% Ambient P=kPa, Tair=C ultra zero air at 1900psi, ch4 in air 4.982 at 950 CH4 Zero Offset: 0.047ppm CH4 Span Offset: 0.010ppm Notes: Calibrated on the West Pond tower by Cove and Joe. Last cal is the original done at Licor. |
| 1539 | 2012-05-02 | Sherman Island Gas Analyzer CH4 | Installed | West Pond Gas Analyzer CH4 | Installed at West Pond on the folding boom at the top of the tower. |
| 1538 | 2012-05-02 | Sherman Island Gas Analyzer CH4 | Removed | West Pond Gas Analyzer CH4 | Removed from the Sherman tower for use at West pond. Replaced by LGR (sn 08-114). |
| 645 | 2012-02-15 | Lab none | Installed | Sherman Island | Installed on the Sherman tower and connected directly to the CR1000 by ethernet. Auto washer also installed. |