Equipment and Calibration History

History for Licor LI-7700 TG1-0514

Rec No.	Date	Loc From	Title	Loc To	Notes
7203	2025-04-25	Lab	Calibration	Lab	Calibration Location: Lab Last calibration: 2024-10-07 RSSI=84.6%, Optical RH=10% Ambient P=100.37kPa, Tair=15.7C Zero Air at 200psi, AMP FB04304 1.9024 at 700 CH4 Zero Offset: -0.026ppm CH4 Span Offset: 0.022ppm Notes: Pressure took a long time to stabilize but eventually looked good matching weather apps and 7500.
7205	2025-04-17	Tonzi Gas Analyzer CH4 Floor	Removed	Lab none	Removed from Tonzi Floor for calibration. Replaced by sn TG1-0216.
6905	2024-10-10	Lab none	Installed	Tonzi Gas Analyzer CH4 Floor	Installed on the Floor tower by adding a new mount using L-brackets and a rail fitting removing existing Allen screws and reusing the sockets for standard 1/4-20 bolts. No wash box, hat but no spikes.
6901	2024-10-07	Lab	Calibration	Lab	Calibration Location: Lab Last calibration: 2021-07-12 RSSI=79%, Optical RH=21% Ambient P=100.2kPa, Tair=31.5C Zero Air at 1400psi, AMP FB04035 1.19156 at 1000 CH4 Zero Offset: -0.057ppm CH4 Span Offset: 0.0704ppm Notes: First check of instrument from USGS. Last zero was 2023-09-08. Clock 25min behind, set heater and wash to Biomet Default. TC was dead, swapped with repaired one. Initial span used ppb instead of ppm so off by a factor of 1000. Redid span on 10/08 with different tank - seemed fine less than ppb off.