Campbell-scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC1 Manuel d'utilisateur télécharger pdf (Page 46)

EC155 CO

and H

O Closed-Path Gas Analyzer

FIGURE 9-8. Replacing the detector housing desiccant/scrubber bottle

9.6 Factory Recalibration

When the EC155 is manufactured, it goes through an extensive calibration

process, covering a wide range of temperatures, pressures, and gas

concentrations. All CO

calibration gases used in this process are mixtures of

in ambient air traceable to the WMO Mole Fraction Scale maintained by

the Central Carbon Dioxide Laboratory and the Carbon Cycle Greenhouse

Gases Group of the Global Monitoring Division/National Oceanographic and

Atmospheric Administration in Boulder, CO, USA.

After an extended period of time in the field, the EC155 may need to undergo

this factory calibration again in order to ensure valid measurements. When

recalibration is deemed necessary, contact Campbell Scientific.

For the CSAT3A, refer to the CSAT3A instruction manual for information on

recalibration.

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Campbell-scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC1 Manuel d'utilisateur Page 46