Campbell-scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC1 Manuel d'utilisateur télécharger pdf (Page 15)

EC155 CO

and H

O Closed-Path Gas Analyzer

noise rms, assumes:

o 25°C

o 85 kPa

o 19 mmol/mol H

O concentration

o 326 mmol/mol CO

concentration

o 25 Hz bandwidth.

user selectable

-30° to 50°C

noise rms

assumes:

o -30° to +50°C

o wind speed <30 m·s

-1

o azimuth angles between ±170°

refer to manufacturer’s product brochure or manual for details

5.2 Output Signals

Features

• EC100 electronics outputs data using:

o CS SDM

o RS-485

o USB

o Analog out

Digital

SDM (Synchronous Device for Measurement)

Data type: FLOAT

RS-485

Data type: ASCII

Output Rate

: 5 to 50 Hz

Baud rate

: 1200 to 230400 bps

USB

Data type: ASCII

Output rate

: 10, 25 or 50 Hz

Analog (two outputs for CO

and H

O molar mixing ratios)

Voltage range: 0 mV to 5000 mV

Resolution: 76 µV (16 bit)

Update rate: 150 Hz

Accuracy (at 25

C): ±3 mV

mixing ratio equation: µmol/mol = 211.27 (V

out

) – 56.34

Full scale range: -56 to 1000 µmol/mol

O mixing ratio equation: mmol/mol = 11.31 (V

out

) – 3.04

Full scale range: -3 to 53 mmol/mol

Synchronous Device for Measurement. A Campbell Scientific, Inc. proprietary serial interface

for datalogger to peripheral and sensor communication. See Section 8.1, SDM Output for details.

user selectable

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Campbell-scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC1 Manuel d'utilisateur Page 15

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