| Date: |
2012-08-09 |
| From: |
Lab - none |
| To: |
Lab - none |
| Title: |
Calibration |
| Notes: |
Last calibration: 2012-08-07
AGC=43.8 SDM=10 DAC1= DAC2=
Ambient P=100.25kPa, Tair=22.21C, Tdew=5.88C
Zero air at 1800psi, CO2 in air 436.53 at 450 Tdewspan=15.08
CO2 zero 0.9473 -> 0.8715 Offset: -576ppm
CO2 span 1.3749 -> 1.0183 Offset: 225.47ppm
H2O zero 0.6596 -> 0.6361 Offset: -151ppm
H2O span 1.2399 -> 1.0392 Offset: 4.02ppm
Notes: This was a second calibration after upgrading to a LI75000A head interface and letting new internal chemicals settle for two days. There are large offsets but the new zero/span numbers match the calibration of 8-6 before the upgrade. A second check of zeros CO2 0.8714 0.5 ppm offset, H2O 0.6364 2.3 mmol/m3 offset.
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