Campbell-scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC1 Manuale Utente Scaricare il pdf (Pagina 13)

EC155 CO

and H

O Closed-Path Gas Analyzer

5. Specifications

5.1 Measurements

Features

• To compute carbon dioxide, water vapor, and sensible heat fluxes using

the eddy-covariance method, the EC155 measures:

o absolute carbon dioxide

o water vapor mixing ratios

o three-dimensional wind speed (requires CSAT3A)

o sonic air temperature (requires CSAT3A)

o sample-cell temperature

o barometric pressure

These measurements are required to compute carbon dioxide and water vapor

fluxes using the:

• Standard outputs:

o CO

mixing ratio, H

O mixing ratio

o gas analyzer diagnostic flags

o cell temperature, cell pressure

o CO

signal strength, H

O signal strength

o differential pressure

o air temperature and air pressure are auxiliary sensor inputs

• Additional outputs:

o u

, u

, and u

orthogonal wind components

o sonic temperature (based on the measurement of c, the speed of

sound)

o sonic diagnostic flags

Compatibility: CR1000

CR3000

CR5000

Measurement

Rate: 100 Hz

Output bandwidth

: 5, 10, 12.5, 20, or 25 Hz

Output rate

: 10, 25 or 50 Hz

Operating temperature: -30

to 50

Gas analyzer

Measurement precision

density: 0.2 mg·m

-3

(0.15 µmol·mol

-1

)

O density: 0.00350 g·m

-3

(0.006 mmol·mol

-1

)

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Campbell-scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC1 Manuale Utente Pagina 13

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