Equipment and Calibration History
History for Licor LI-6400 PSC-2474
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 7019 | 2024-11-13 | Lab none | For Resuse | Lab none | Marked for reuse |
| 3894 | 2019-03-25 | Lab none | Calibration | Lab none | Camilo Rey-Sanchez and Daphne Szutu
Camilo attached a leaf chamber with a transparent top. He cleaned the chamber, but it wasn't as dusty as he suspected. I changed the time from 15:26 to 13:38. We connected the reference and sample inlet to the cal gases/dewpoint generator with a y-junction. We checked the zero using the chemicals and they seemed ok, but we decided to calibrate zero/spans using the the cal gases and dewpoint generator anyways. Zero: Checked using chemicals: CO2_S: 1.4 CO2_R: -0.1 H2O_S: 0.55 H2O_R: 1.4 Set zero using cal gas: Cal gas = zero air, 1100 psi, 1 SCFH flow Before: CO2_S:-0.9 CO2_R: 4.2 H2O_S: -0.043 H2O_R: -0.592 After: *All fluctuating around zero. Span with 408.97ppm cal gas from AMP: Cal gas = AMP cal gas at 408.97ppm, 800 psi, 1 SCFH flow Before: CO2_R: 408.7 CO2_S: 407.3 After: CO2_R: Did not adjust CO2_S: 409.0 Span with 16.0C dew point: Before: H2O_R: ?? C H2O_S:?? C After: ?? |
| 3600 | 2018-07-16 | Lab none | Calibration | Lab none | Elke Eichelmann & Katrina Cone
We borrowed this LI-6400 from the Silver lab and they had not zeroed and spanned it for about 10 years. We checked the zero with the chemicals and they were a little off, so we set the zero and the span using cal gas and a dewpoint generator. Considering how long this analyzer had not been calibrated the settings were actually pretty good. But it also hadn't been used for most of that time. Then we zeroed and spanned: Zero: Checked using chemicals: CO2_S: 15.2 CO2_R: 7.8 H2O_S: 5.7 H2O_R: 5.7 Set zero using cal gas (zero air): Before: CO2_S:16.8 CO2_R: 6.82 H2O_S: 0.32 H2O_R: 0.282 After: *All fluctuating around zero. Span with 408.97ppm cal gas: Before: CO2_R: 404.4 CO2_S: 404.8 After: *Fluctuating around 409 Span with 16.0C dew point: Before: H2O_R: 15.06C H2O_S:15.02C After: *Fluctuating between 15.99 and 16.01 |