Equipment and Calibration
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Equipment Entry
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Documents
Calibration: cal_Licor_LI-7700_snTG1-0224_20120119.pdfManual: Collecting_LI-7700_Ethernet_Data.pdf
Manual: LI-7700_Manual_V2_201103.pdf
Manual: LI-7700_Manual_V3_201312.pdf
PackingSlip: ps_Licor_20120207.pdf
History
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 5354 | 2021-06-24 | Bouldin Corn Gas Analyzer CH4 | Removed | Loaned none | Removed from BC and loaned to Steve, Sabina and Nick for use on Staten Island. This unit belongs to DWR and the one they had belongs to UCB. |
| 5275 | 2021-05-27 | Bouldin Corn | Calibration | Bouldin Corn | Calibration Location: Bouldin Corn
Last calibration: 2020-11-30 RSSI=73%, Optical RH=15% Ambient P=101.6kPa, Tair=26.8C AMP FB03864 at 900psi, AMP CA04119 4.223 at 1900 CH4 Zero Offset: 0.006ppm CH4 Span Offset: -0.003ppm Notes: Zero gas was an AMP cal gas in a baby tank that we borrowed for the day. |
| 5089 | 2021-02-03 | Lab none | Installed | Bouldin Corn Gas Analyzer CH4 | Installed on the BC tower to replace sensors damaged when the tower fell last week |
| 4991 | 2020-11-30 | Lab none | Upgrade | Lab none | Upgraded firmware from v1.0.27 to v1.0.29 - it is mostly fixes that are useful internally to Licor. https://www.licor.com/env/support/LI-7700/topics/change-log.html |
| 4990 | 2020-11-30 | Lab | Calibration | Lab | Calibration Location: Lab Last calibration: 2020-05-20 RSSI=73%, Optical RH=11% Ambient P=101.2kPa, Tair=24.0C Zero Air at 500psi, AMP CA4396 1.9497 at 375 CH4 Zero Offset: -0.054ppm CH4 Span Offset: 0.009ppm Notes: First calibration after renaming from "unknown" to its serial number. After this calibration, I will upgrade the firmware to v1.0.29. |
| 4989 | 2020-11-25 | Lab none | Maintenance | Lab none | Renamed from "Unknown" to "TG1-0224" and rebooted. The optics RH was 22%, so I swapped the desiccant and flushed the headspace with zero air. The new optics RH was 11%. I will let it run for a few days, logging data, to see if there are any issues before I calibrate. |
| 4978 | 2020-11-19 | West Pond Gas Analyzer CH4 | Removed | Lab none | Removed from West Pond for calibration. Replaced by sn TG1-0421. It was brought back to the lab because its name was "Unknown" in both the 7550 and 7700 software instead of the usual serial number. |
| 4453 | 2020-05-19 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond
Last calibration: 2019-10-22 RSSI=71%, Optical RH=9% Ambient P=101.5kPa, Tair=21.5C Zero Air at 950psi, AMP CA3923 3.121 at 900 CH4 Zero Offset: -0.022ppm CH4 Span Offset: -0.003ppm Notes: Breezy day |
| 4115 | 2019-10-22 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2019-04-11 RSSI=72%, Optical RH=27% Ambient P=101.8kPa, Tair=27.2C Zero Air at 1300psi, AMP CA03923 3.121 at 1200 CH4 Zero Offset: 0.043ppm CH4 Span Offset: 0.000ppm Notes: Was stabilizing at 0.033 for zero but went up after adjusting gas flow. Optics desiccant swapped after calibration. Cal gas used to dry head space. New RH about 10% |
| 3946 | 2019-04-25 | West Pond Gas Analyzer CH4 | Upgrade | West Pond Gas Analyzer CH4 | 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 |
| 3897 | 2019-04-11 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond Last calibration: 2018-10-25 RSSI=71%, Optical RH=24% Ambient P=101.8kPa, Tair=17.2C Zero Air M4002 at 1600psi, AMP CA03923 3.1210 at 1700 CH4 Zero Offset: -0.005ppm CH4 Span Offset: 0.008ppm Notes: Windy day. Optical RH high - needs new desiccant. |
| 3760 | 2018-10-25 | West Pond Gas Analyzer CH4 | Calibration | West Pond Gas Analyzer CH4 | Calibration Location: West Pond
Last calibration: 2018-04-04 RSSI=70%, Optical RH=22% Ambient P=101.7kPa, Tair=25.5C Zero Air at 1950psi, AMP Air 3.121 at 2100 CH4 Zero Offset: -.004ppm CH4 Span Offset: -.002ppm Notes: Calm day. Before calibrating, we flushed head spaced with zero air. Optics RH dried down from 22% to 13% before calibration started. |
| 3392 | 2018-04-05 | Lab none | Installed | West Pond Gas Analyzer CH4 | Installed at WP to replace sn TG1-0424, which was brought back to the lab for calibration. |
| 3381 | 2018-04-04 | Lab none | Calibration | Lab none | Calibration Location: Lab Last calibration: 2017-11-27 RSSI=73%, Optical RH=14% Ambient P=100.7kPa, Tair=23.9C Zero Air at 100psi, LBL Air 1.9497 at 1700 CH4 Zero Offset: -.002ppm CH4 Span Offset: .167ppm Notes: Powered up twice successfully and synced waveforms within 20 seconds. Actual laser temperature = 25.6C, set laser temperature = 26.C. |
| 3283 | 2018-01-12 | Lab none | Adjusted | Lab none | This 7700 has an unlocked reference signal (the reference and signal waveforms were not synced). I talked with James at Licor and changed the Laser Start Temp from 29.8 to 25.5 in the factory settings (Help > About > Factory). To find the new start temperature, I did a Wide Scan (Help > About > Wide Scan > Start), which goes through temperature 0-50 deg C. There is a graph and table of results, where you can pinpoint the reference lock temperature. During the Wide Scan, some of the factory settings changed, so I reset those (changed Delta 1 from 100 back to 41). Licor has the original factory settings on file. |
| 3279 | 2018-01-10 | Lab none | Adjusted | Lab none | Checked the sensor in the lab, and the temperature reading was fine. However, there was an error "Reference signal is UNLOCKED," and CH4 was reading ~0.05 umol/mol. The diagnostics tab showed that the signal and reference waveforms were not synced. I changed the temperature control to manual, adjusted the laser temperature from 30.6 to 26.0 so that the waveforms were synced, and changed the temperature control back to automatic. |
| 3219 | 2017-11-30 | Lab none | Notes | Lab none | Temperature was reading -9C after we installed it at SW, so we brought it back to the lab...The temperature was fine earlier this week when I calibrated it. |
| 3203 | 2017-11-27 | Lab none | Calibration | Lab none | Calibration Location: Lab Last calibration: 2017-03-22 RSSI=71%, Optical RH=7% Ambient P=100.9kPa, Tair=22.4C Zero Air at 350psi, LBL Air 1.9497 at 1750 CH4 Zero Offset: 0.016ppm CH4 Span Offset: 0.005ppm Notes: |
| 3191 | 2017-11-09 | Lab none | Repair | Lab none | Replaced thermocouple assembly on 7700. Temperature reading changed from 9999 to 24.5 deg C. |
| 3164 | 2017-10-26 | Sherman Wetland Gas Analyzer CH4 | Removed | Lab none | Removed from SW tower for calibration and because the temperature sensor was broken (reading 9999). Replaced by sn TG1-0421. |
| 2674 | 2017-03-23 | Lab none | Installed | Sherman Wetland Gas Analyzer CH4 | Installed at Sherman Wetland to replace TG1-0423. |
| 2661 | 2017-03-22 | Lab none | Calibration | Lab none | Calibration Location: Lab Last calibration: 2016-10-27 RSSI=67.3%, Optical RH=22% Ambient P=100.9kPa, Tair=22.7C Zero Air at 1700psi, NOAA CH4 1.89919 at 1750 CH4 Zero Offset: 0ppm CH4 Span Offset: 0.001ppm Notes: Changed dessicant |
| 2590 | 2016-12-02 | Loaned | Returned | Lab none | Returned from Frank Anderson via FedEx. He ran this instrument for 2-3 weeks at his salt marsh site near Seattle Washington. |
| 2518 | 2016-10-27 | Lab none | Loaned | Loaned | Loaned to Frank Anderson. He will use it temporarily at his Nisqually Marsh site while his 7700 is tested for no signal problems. |
| 2517 | 2016-10-27 | Lab none | Calibration | Lab none | Calibration Location: Lab Last calibration: 2014-03-07 RSSI=79.3%, Optical RH=17% Ambient P=100.4kPa, Tair=22.8C Zero Air at 400psi, CH4 2nd 4.995 at 500 CH4 Zero Offset: 0.042ppm CH4 Span Offset: 0.057ppm Notes: Last calibration at Licor after replacement of laser due to unknown failure. |
| 1728 | 2015-02-05 | East End Gas Analyzer CH4 | Removed | Lab none | Removed from East End for testing in the lab due to the pump control problem. Replaced by sn TG1-0155 |
| 1720 | 2015-01-20 | Lab none | Installed | East End Gas Analyzer CH4 | Reinstalled after being removed when the scaffolding fell over. This 7700 still has a wash pump control problem. |
| 1637 | 2014-12-23 | Mayberry Gas Analyzer CH4 | Removed | Lab none | Removed from the Mayberry Tower because it has a problem controlling the wash pump. Replaced by sn TG1-0357. |
| 1515 | 2014-08-19 | Lab none | Installed | Mayberry Gas Analyzer CH4 | Installed on the Mayberry tower with 7500 sn 75H-2514 and 7550 sn AIU-1285to replace the Ameriflux emergency response GHG system. |
| 1507 | 2014-08-18 | Factory | Returned | Lab none | Returned from Licor. Sporadic line lock problems were finally traced to the laser. Licor was unable to determine why the laser failed and replace the laser for free. Licor calibrated the sensor. |
| 1506 | 2014-07-01 | Lab none | Shipped | Factory | This sensor has been having sporadic line lock problems both in the field and in the lab. Shipped to Licor for diagnosis and repair. |
| 1505 | 2014-06-13 | Mayberry-Portable | Removed | Lab none | Removed from the portable tower due to intermittent line lock problems. Brought to the lab for further testing. Replaced by sn TG1-0357. |
| 1504 | 2014-04-28 | Mayberry Gas Analyzer CH4 | Installed | Mayberry-Portable Gas Analyzer CH4 | Installed on the Mayberry Portable tower with LI-7500 sn 75H-2176 and LI-7550 sn AIU-0397. This tower is mounted in the back of Dennis's truck and will be moved between two locations on a roughly weekly basis. |
| 1321 | 2014-04-28 | Mayberry Gas Analyzer CH4 | Removed | Mayberry-Portable Gas Analyzer CH4 | Removed from the permanent Mayberry tower and installed on the portable tower. Replaced by Ameriflux sn TG1-0352 |
| 1230 | 2014-03-07 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: Mayberry Last calibration: 2013-08-21 RSSI=86%, Optical RH=14% Ambient P=101.9kPa, Tair=22.0C Zero Air at 1600psi, 2nd CH4 4.995 at 1100 CH4 Zero Offset: 0.02ppm CH4 Span Offset: 0.015ppm Notes: Calibrated by Cove and Sara after firmware upgrade to v1.0.21 |
| 1051 | 2013-08-21 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: Mayberry Last calibration: 2013-02-21 RSSI=82%, Optical RH=8% Ambient P=101.0kPa, Tair=24.2C Zero Air at 1700psi, CH4 in air 4.995 at 1300 CH4 Zero Offset: 0.000ppm CH4 Span Offset: -0.026ppm Notes: It was windy but seemed to have no effect. The concentration of the secondary ch4 standard has been reevaluated since last cal. Last time 4.982, now 4.995 |
| 932 | 2013-02-21 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: Mayberry Last calibration: 2012-09-06 RSSI=85%, Optical RH=3% Ambient P=101.97kPa, Tair=14.4C Zero Air at 1800psi, 2nd CH4 in Air 4.982 at 1300 CH4 Zero Offset: 0.011ppm CH4 Span Offset: 0.010ppm Notes: The 7700 had lost line lock and was manually lock prior to calibration. |
| 836 | 2012-09-06 | Mayberry Gas Analyzer CH4 | Calibration | Mayberry Gas Analyzer CH4 | Calibration Location: Mayberry Last calibration: 2012-01-19 RSSI=58%, Optical RH=% Ambient P=101.37kPa, Tair=17.0C ultra zero air at 1900psi, ch4 in air 4.982 at 950 CH4 Zero Offset: 0.034ppm CH4 Span Offset: 0.016ppm Notes: Calibrated in the field by Joe and Cove |
| 545 | 2012-04-24 | Lab none | Installed | Mayberry Gas Analyzer CH4 | Installed on the Mayberry eddy tower to swap out LI-7700 sn TG1-0155 |