Equipment and Calibration History
History for Licor LI-7700 TG1-0203
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 7005 | 2024-10-24 | Lab none | Installed | Rush Ranch Gas Analyzer CH4 | Installed on new mount at the top of the main tower at Rush Ranch |
| 6900 | 2024-10-07 | Lab | Calibration | Lab | Calibration Location: Lab Last calibration: 2016-09-09 RSSI=79%, Optical RH=11% Ambient P=99.58kPa, Tair=33.8C Zero Air at 1300psi, AMP FB04035 1.9156 at 850 CH4 Zero Offset: -0.087ppm CH4 Span Offset: 0.0034ppm Notes: First check of instrument from USGS. Last zero was 2016-01-08. Clock 20min fast, set heater and wash to Biomet Default. Head humidity at 38%. Swapped head desiccant and flushed head space to 11%. Initial span used ppb instead of ppm for off by a factor of 1000. Redid span on 10/14 with different tank FB04319, 2.6969ppm CH4, 1000psi - seemed fine. |
| 6984 | 2024-10-04 | Returned none | Location | Lab none | Brought to UCB by Kat Cone for the handoff of Rush Ranch |
| 1216 | 2014-02-25 | East End Gas Analyzer CH4 | Removed | Returned none | Removed from the East End tower with its wash box to be returned to Frank. |
| 1168 | 2013-11-25 | DWR Corn Gas Analyzer CH4 | Moved | East End Gas Analyzer CH4 | The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland |
| 1070 | 2013-09-05 | Lab none | Installed | DWR Corn Gas Analyzer CH4 | Installed on the Corn / Construction tower. This sensor was added to the system by a direct connection to the CR1000 by Ethernet. The CR1000 program was changed to read the Ethernet signal. The 7700 was set to output at 40Hz to try and minimize the loss of messages due to clock drift. |