Equipment and Calibration
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Equipment Entry
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Documents
Manual: LI-6262_Manual_V3_199603.pdfHistory
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 2453 | 2016-09-09 | Lab none | Calibration | Lab none | Calibrated in differential mode for double check of secondary standard. Ambient temperature was 24.37C, pressure was 100.54kPa. Using Zero air (400psi) and god bottle 421.22ppm CO2 (400psi). Flowing zero air in both sample and reference CO2 0.22ppm - adjusted to 0.06 H2O 0.25 - could not adjust - railed Flowing zero air in reference and god bottle in sample CO2 = 420.54ppm adjusted to 421.26ppm. Flowing zero air in reference and secondary standard in sample, I recorded serial data with Hyperterm and took an average of 100 points. The new tank is 405.83ppm I accidentally changed the H2O span. I reset to approximately the same value but did not check it with the dew point generator. |
| 990 | 2013-05-08 | Lab none | Calibration | Lab none | Calibrated in differential mode for double check of secondary standard. Ambient temperature was 22.52C, pressure was 101.18kPa. Using Zero air (1700psi) and god bottle 421.22ppm CO2 (1700psi).
Flowing zero air in both sample and reference CO2 -4.15ppm - adjusted to 0.0 H2O 0.0050 - did not adjust Flowing zero air in reference and god bottle in sample CO2 = 426.2ppm adjusted to 421.22ppm. Flowing zero air in reference and secondary standard in sample, I recorded serial data with Hyperterm and took an average of 409 points. The new tank is 337.64ppm |
| 965 | 2013-04-22 | Lab none | Calibration | Lab none | Calibrated in differential mode for check of new secondary standard. Ambient temperature was 28.8C, pressure was 100.55kPa. Using N2 (1100psi) and god bottle 402.69ppm CO2 (1800psi).
Flowing N2 in both sample and reference CO2 +3ppm - adjusted to 0.0 H2O -0.19 - railed Flowing N2 in reference and god bottle in sample CO2 = 401.5ppm adjusted to 402.69ppm. Flowing N2 in reference and new secondary standard in sample, I recorded serial data with Hyperterm and took an average of 587 points. The new tank is 404.02ppm |
| 925 | 2013-02-12 | Lab none | Calibration | Lab none | Calibrated in differential mode for check of new secondary standard. Ambient temperature was 23.55C, pressure was 101.98kPa. Using N2 (1600psi) and god bottle 402.69ppm CO2 (1800psi).
Flowing N2 in both sample and reference CO2 -3.79 - adjusted to 0.0 H2O -0.0863 - adjusted to 0.0 Flowing N2 in reference and god bottel in sample CO2 = 402.90ppm adjusted to 402.69ppm. Flowing N2 in reference and new secondary standard in sample, I recorded serial data with Hyperterm and took an average of 201 points. The new tank is 344.62ppm |
| 882 | 2013-01-29 | Lab none | Calibration | Lab none | Calibrated in differential mode for check of new secondary standard. Ambient temperature was 22.9C, pressure was 101.84kPa. Using N2 (1600psi) and god bottle 402.69ppm CO2 (1800psi).
Flowing N2 in both sample and reference CO2 -0.53 - adjusted to 0.0 H2O +0.055 - railed but okay Flowing N2 in reference and god bottel in sample CO2 = 401.70ppm adjusted to 402.69ppm. Flowing N2 in reference and new secondary standard in sample, I recorded serial data with Hyperterm and took an average of 300 points. The new tank is 392.30ppm |
| 502 | 2012-01-26 | Lab none | Calibration | Lab none | Calibrated in differential mode for check of Frank's new secondary standard. Ambient temperature was 21.349C, pressure was 101.69kPa. Using N2 and god bottle 402.69ppm CO2.
Flowing N2 in both sample and reference CO2 okay. H2O okay. Flowing N2 in reference and god bottel in sample CO2 = 400.70ppm adjusted to 402.69ppm. Flowing zero air in reference and new secondary standard in sample, I wrote down about 60 readings and made an average. Frank's secondary standard has 444.44ppm CO2. |
| 458 | 2011-12-12 | Lab none | Calibration | Lab none | Calibrated in differential mode for check of new secondary CO2 standards. Ambient temperature was 18.987C, pressure was 99.746kPa. Using zero air (800psi)and god bottle 370.91ppm CO2 (1650psi).
Flowing zero air in both sample and reference CO2 = -0.20umol/mol adjusted to zero. H2O = -0.0.004mmol/mol not adjusted Flowing zero air in reference and god bottel in sample CO2 = 370.25ppm adjusted to 370.91ppm. Flowing zero air in reference and new secondary standard in sample, I wrote down about 60 readings and made an average. One new CO2 secondary standard has 421.63ppm CO2, the other was 436.52ppm CO2. Both tanks were label. |
| 451 | 2011-11-18 | Lab none | Calibration | Lab none | Calibrated in differential mode for check of Frank's new secondary CO2 standard. Ambient temperature was 21.5C, pressure was 100.45kPa. Using N2 and god bottle 402.69ppm CO2 (1850psi).
Flowing N2 in both sample and reference CO2 = -0.30umol/mol adjusted to zero. H2O = -0.15 Flowing N2 in reference and god bottel in sample CO2 = 401.8ppm adjusted to 402.69ppm. Flowing N2 in reference and new secondary standard in sample, I wrote down 75 readings and made an average. The new CO2 secondary standard has 398.22ppm CO2. |
| 423 | 2011-10-10 | Lab none | Calibration | Lab none | Calibrated in differential mode for check of new secondary CO2 standard. Ambient temperature was 24.554C, pressure was 100.43kPa. Using zero air (800psi) and god bottle 370.91ppm CO2 (1700psi).
Flowing zero air in both sample and reference CO2 = 0.55umol/mol adjusted to zero. H2O = 0.0003 Flowing zero air in reference and god bottel in sample CO2 = 371.25ppm adjusted to 370.91ppm. Flowing zero air in reference and new secondary standard in sample, I wrote down 90 reading and made an average. The new CO2 secondary standard has 410.49ppm CO2. |
| 384 | 2011-07-08 | Lab none | Calibration | Lab none | I calibrated the Li6262 in differential mode. I flowed zero air through a T into both the reference and sample cells at a flow just detectable on wetted lips. CO2 was low by about a 0.1 ppm CO2. I adjusted both CO2 zero and H2O zero. I then flowed 370.91ppm CO2 in air (god bottle) through the sample while leaving the zero air in the reference. The 6262 read 369.20+-0.05ppm. I adjusted the CO2 span to match the tank value. I tested the nearly empty 597.4ppm tank and it was true. I then test the new 400ppm CO2 in air tank and came up with a value of 405.85ppm and labeled the tank with this value. |
| 170 | 2010-08-04 | Lab none | Calibration | Lab none | I calibrated the LI-6262 with ultra pure N2, zero air and primary standard 370.91ppm CO2 (God bottle). I changed the chemicals for the chopper/reference path and let the 6262 run over night. The N2 and zero air gave very similar results with the zero air possibly being 1ppm CO2 and 14ppm H2O higher than the N2 tank. I filled a new scrub tube with Ascarite II and Drierite and used this to scrub the zero air. I spanned with the 370.91ppm CO2 God bottle. Then I checked a new tank of 400ppm CO2 that will go to Tonzi. This tank checked out at 384.08ppm CO2. |