Equipment and Calibration History

History for Los Gatos Research FGGA 09-0012

Rec No.DateLoc FromTitleLoc ToNotes
193 2010-04-09 Lab none Returned Returned Returned to Frank Anderson for Twitchell ponds.
72 2010-03-04 Twitchell Rice Removed Lab none This analyzer was removed from Twitchell for mainenance - low pressure on internal pump. It is now in the lab.
1479 2010-02-18 Twitchell Rice Calibration Twitchell Rice Last calibration: 2010-01-14 00:00:00
Cell Pressure=39.54kPa, Cell Temperature=27.98C, Ring Time=17.17usec
2nd standard at 0psi: CH4: 3.276ppm, CO2: 433ppm, H2O: 0ppm
CH4 = 3.5032ppm -> 3.316ppm Offset: -0.227ppb
CO2 = 448.8ppm -> 441ppm Offset: -15.8ppm
Notes: External filter seemed plugged up, swapped it with cleaned filter before calibration. Values improved, but I still don't agree with cal tank. I think the very low pressure is a problem. Maybe the internal filter is plugged up. I will do some check in the lab and then possibly swap out the LGR.
1477 2010-01-14 Twitchell Rice Calibration Twitchell Rice Last calibration: 2009-03-03 00:00:00
Cell Pressure=148.63kPa, Cell Temperature=28.27C, Ring Time=17.277usec
2nd Standard at 0psi: CH4: 3.276ppm, CO2: 433ppm, H2O: 0ppm
CH4 = 3.368ppm -> 3.275ppm Offset: -0.092ppb
CO2 = 432.1ppm -> 433.4ppm Offset: 0.9ppm
Notes: LGR pressure very low ~16Torr, but very easily adjusted using bypass valve.
1478 2009-08-06 Lab none Installed Twitchell Rice Installed Frank's FGGA at the rice