| Date: |
2015-04-20 |
| From: |
Lab - none |
| To: |
Lab - none |
| Title: |
Calibration |
| Notes: |
Last calibration: 2014-12-22
AGC=72.8 SDM=1 DAC1=- DAC2=-
Ambient P=100.0kPa, Tair=20.13C, Tdew=12.49C
Zero Air at 850psi, God CO2 421.22 at 1100 Tdewspan=15.96
CO2 zero 0.8909 -> 0.8897 Offset: -5.4ppm
CO2 span 0.9835 -> 1.0074 Offset: -13.02ppm
H2O zero 0.705 -> 0.7055 Offset: 4.0ppm
H2O span 1.1245 -> 1.0071 Offset: 2.34ppm
Notes: The internal chemicals were changes a few weeks ago - the old ones still looked good though. Relatively large offsets in span, H2O span offset similar to other 7500s calibrated at this time - dew point generator and Vaisala probe agreed with in 0.5C
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