Equipment and Calibration

Equipment Entry

Instrument:	Gas Analyzer
Manufacture:	Licor
Model No:	LI-7700
Serial No:	TG1-0423
Tag No:
Acquisition Date:	2015-09-10
Project:	CDFW
Location on 2019-02-12:	East End,
Notes:	GHG-1 package comprised of: sn TG1-0423, sn 75H-2668, sn AIU-1569

Documents

Calibration: cal_LI-7700_snTG1-0423.pdf
Manual: Collecting_LI-7700_Ethernet_Data.pdf
Manual: LI-7700_Manual_V2_201103.pdf
Manual: LI-7700_Manual_V3_201312.pdf
PackingSlip: ps_Licor_20150910.pdf

History

Rec No.	Date	Loc From	Title	Loc To	Notes
6529	2024-01-11	East End	Calibration	East End	Calibration Location: East End Last calibration: 2023-06-15 RSSI=79%, Optical RH=23% Ambient P=102.2kPa, Tair=16.0C Zero Air at 1800psi, AMP CA03923 3.3865 at 1725 CH4 Zero Offset: .015ppm CH4 Span Offset: .0015ppm Notes: After calibration, flushed headspace with zero air until optics RH=9% and swapped in a bottle with fresh drierite.
6304	2023-06-15	East End	Calibration	East End	Calibration Location: East End Last calibration: 2023-01-18 RSSI=82%, Optical RH=16% Ambient P=100.9kPa, Tair=26.7C Zero Air at 1150psi, AMP CA04119 4.2238 at 1000 CH4 Zero Offset: -.06ppm CH4 Span Offset: .0138ppm Notes: Optics RH=16%, which is pretty good, so we did not flush the headspace or change its desiccant.
6168	2023-01-18	East End	Calibration	East End	Calibration Location: East End Last calibration: 2022-06-09 RSSI=77%, Optical RH=21% Ambient P=101.9kPa, Tair=12.6C Zero Air at 1450psi, AMP CA04396 1.9317 at 1200 CH4 Zero Offset: .025ppm CH4 Span Offset: .0023ppm Notes: After calibration, changed desiccant and flushed headspace with zero air until optics RH=14%.
5895	2022-06-09	East End	Calibration	East End	Calibration Location: East End Last calibration: 2021-12-01 RSSI=70%, Optical RH=17% Ambient P=101kPa, Tair=29.5C Zero Air at 350psi, AMP CA04119 4.2238 at 1550 CH4 Zero Offset: .015ppm CH4 Span Offset: -.0098ppm Notes: Hot day, some breeze. Did not change drierite or flush headspace with zero air.
5613	2021-12-01	East End	Calibration	East End	Calibration Location: East End Last calibration: 2021-06-01 RSSI=83%, Optical RH=15% Ambient P=101.2kPa, Tair=19.2C Zero Air at 1200psi, AMP CA04396 1.9317 at 1800 CH4 Zero Offset: .007ppm CH4 Span Offset: .0023ppm Notes: Relatively still day. Did not change drierite or flush headspace with zero air. Zero air tank pressure uncertain--wonky regulator.
5279	2021-05-26	East End	Calibration	East End	Calibration Location: East End Last calibration: 2020-11-19 RSSI=80%, Optical RH=13% Ambient P=101.5kPa, Tair=29.2C AMP FB04161 at 500psi, AMP CA04119 4.223 at 2050 CH4 Zero Offset: 0ppm CH4 Span Offset: 0.008ppm Notes: Relatively still day. Zero gas was an AMP cal gas in a baby tank that we borrowed for the day. Zero was right on.
4981	2020-11-19	East End	Calibration	East End	Calibration Location: East End Last calibration: 2020-05-19 RSSI=77%, Optical RH=12% Ambient P=102.4kPa, Tair=18C Zero Air at 500psi, AMP CA3923 3.121 at 500 CH4 Zero Offset: -0.05ppm CH4 Span Offset: -0.002ppm Notes: Breezy day
4454	2020-05-19	East End Gas Analyzer CH4	Calibration	East End Gas Analyzer CH4	Calibration Location: East End Last calibration: 2019-10-22 RSSI=83%, Optical RH=20% Ambient P=101.5kPa, Tair=22.5C Zero Air at 900psi, AMP CA3923 3.121 at 850 CH4 Zero Offset: 0.01ppm CH4 Span Offset: 0.006ppm Notes: Swapped optics desiccant (indicating drierite) after calibration. Used zero air cal gas to dry out head space. New RH ~7%.
4117	2019-10-22	East End Gas Analyzer CH4	Calibration	East End Gas Analyzer CH4	Calibration Location: East End Last calibration: 2019-04-11 RSSI=83%, Optical RH=17% Ambient P=102.0kPa, Tair=24.6C Zero Air at 1300psi, AMP CA03923 3.121 at 1400 CH4 Zero Offset: 0.023ppm CH4 Span Offset: -0.001ppm Notes:
3899	2019-04-11	East End Gas Analyzer CH4	Calibration	East End Gas Analyzer CH4	Calibration Location: East End Last calibration: 2018-10-30 RSSI=73%, Optical RH=11% Ambient P=101.9kPa, Tair=16.5C Zero Air M4002 at 1700psi, AMP CA03923 3.121 at 1800 CH4 Zero Offset: 0.036ppm CH4 Span Offset: 0.013ppm Notes: Windy day
3883	2019-02-12	East End Gas Analyzer CH4	Upgrade	East End Gas Analyzer CH4	Upgraded firmware (embedded software) from 1.0.23 to 1.0.27. Licor change log: "Expanded a buffer in the DSP to prevent phase changes in the DSP data caused when the buffer filled up. This fixes the synchronization loss and resultant data loss between the LI-7550 and LI-7700."
3787	2018-11-01	Lab none	Installed	East End Gas Analyzer CH4	Installed at EE to replace sn TG1-0421, which was brought back to the lab for a power board replacement and calibration.
3781	2018-10-30	Lab none	Calibration	Lab none	Calibration Location: Lab Last calibration: 2018-05-08 RSSI=80%, Optical RH=8% Ambient P=100.8kPa, Tair=27.97C Zero Air at 1500psi, AMP Air 1.9497 at 1000 CH4 Zero Offset: -0.015ppm CH4 Span Offset: -0.0027ppm Notes: First calibration after power board was replaced
3780	2018-10-29	Lab none	Upgrade	Lab none	I swapped out power board pn 9677-073G per Licor's instructions. The new power board is pn 9977-079. According to Licor the original boards Rev 0, could be damaged by exposure to voltage above 24VDC. The new board Rev 0A (V3) should not have that problem. Note: This instrument was replaced with 2 original screws and 2 long screws. The long screws were used to help re-assemble the instrument, and I forgot to swap them for the original, shorter, screws.
3771	2018-10-25	Sherman Wetland Gas Analyzer CH4	Removed	Lab Gas Analyzer CH4	Removed from SW and brought back to the lab for a power board swap and calibration. It was replaced by sn TG1-0424.
3453	2018-05-10	Lab none	Installed	Sherman Wetland Data Logger Met	Installed on Sherman Wetland to replace sn TG1-0421 for calibration
3449	2018-05-08	Lab none	Calibration	Lab none	Calibration Location: Lab Last calibration: 2017-10-23 RSSI=73%, Optical RH=4% Ambient P=100.8kPa, Tair=23.9C Zero Air at 400psi, LBL Air 1.9497 at 1400 CH4 Zero Offset: 0.016ppm CH4 Span Offset: 0.0067ppm Notes:
3447	2018-05-03	Mayberry Gas Analyzer CH4	Removed	Lab Gas Analyzer CH4	Removed from MB and brought back to the lab for calibration. It was replaced by TG1-0423.
3181	2017-10-26	Lab none	Installed	Mayberry Gas Analyzer CH4	Installed at MB to replace sn TG1-0357
3156	2017-10-23	Lab none	Calibration	Lab none	Calibration Location: Lab Last calibration: 2017-05-31 RSSI=74.6%, Optical RH=3% Ambient P=101.3kPa, Tair=27.9C Zero Air at 425psi, AMP Air 1.9497 at 1850 CH4 Zero Offset: -0.055ppm CH4 Span Offset: 0.0197ppm Notes:
3167	2017-10-19	East End-Temp1 Gas Analyzer CH4	Removed	Lab none	Removed with decommissioning of East End Open Water tower (temporary tower 1)
2811	2017-06-01	Lab none	Installed	East End-Temp1 Gas Analyzer CH4	Installed at open water temporary tower in East End wetland
2794	2017-05-31	Lab none	Calibration	Lab none	Calibration Location: Lab Last calibration: 2016-10-11 RSSI=80.7%, Optical RH=10% Ambient P=100.3kPa, Tair=20.4C Zero Air at 1500psi, NOAA Air 1.89919 at 1600 CH4 Zero Offset: 0.017ppm CH4 Span Offset: -0.021ppm Notes: Replaced desiccant and flushed cavity with zero air. Optics RH was 26% before replacement and 10% after replacement.
2673	2017-03-23	Sherman Wetland Gas Analyzer CH4	Removed	Lab none	Removed from Sherman Wetland and brought back to the lab for calibration. It was replaced by TG1-0224.
2493	2016-10-11	Sherman Wetland Gas Analyzer CH4	Calibration	Sherman Wetland Gas Analyzer CH4	Calibration Location: Sherman Wetland Last calibration: 2016-05-20 RSSI=78.7%, Optical RH=23% Ambient P=101.6kPa, Tair=16.4C zero air at 850psi, AMP CH4 4.030 at 1900 CH4 Zero Offset: 0.026ppm CH4 Span Offset: 0.023ppm Notes: Windy.
2285	2016-05-24	Lab none	Installed	Sherman Wetland Gas Analyzer CH4	Installed on the Sherman Wetland tower at the initial set up of the site.
2276	2016-05-20	Lab none	Calibration	Lab none	Calibration Location: Lab Last calibration: 2015-07-23 (Factory) RSSI=79.4%, Optical RH=18% Ambient P=100.08kPa, Tair=22.6C Zero Air at 500psi, 17-07-2013 CH4 Tank 4.995 at 500 CH4 Zero Offset: 0.03ppm CH4 Span Offset: 0.006ppm Notes: Uneventful calibration. Previous calibration was factory.