Thiết bị phân tích khí GAS CO2/H20 Campbell Scientific EC150

Thương hiệu: Campbell Scientific | Tình trạng: Còn hàng
Liên hệ

EC150 CO2/H2O Open-Path Gas Analyzer

 

Gọi 0904251826 để được trợ giúp

Thiết bị phân tích khí GAS CO2/H20 Campbell Scientific EC150

Overview

Campbell Scientific’s EC150 is an open-path analyzer specifically designed for eddy-covariance flux measurements. As a stand-alone analyzer, it simultaneously measures absolute carbon-dioxide and water-vapor densities, air temperature, and barometric pressure. With the optional CSAT3A sonic anemometer head, the EC150 also measures three-dimensional wind speed and sonic air temperature.

Benefits and Features

  • Unique optical configuration gives a slim aerodynamic shape with minimal wind distortion

  • Analyzer and sonic anemometer measurements are synchronized by a common set of electronics

  • Maximum output rate of 60 Hz with 20 Hz bandwidth

  • Low power consumption; suitable for solar power applications

  • Low noise

  • Measurements are temperature compensated without active heat control

  • Angled windows to shed water and are tolerant to window contamination

  • Field rugged

  • Field serviceable

  • Factory calibrated over wide range of CO2, H2O, pressure and temperature in all combinations encountered in practice

  • Extensive set of diagnostic parameters

  • Fully compatible with Campbell Scientific dataloggers; field setup, configuration, and field zero and span can be accomplished directly from the datalogger

  • Speed of Sound: Determined from three acoustic paths; corrected for crosswind effects

  • Rain: innovative signal processing and transducer wicks considerably improve performance of the anemometer during precipitation events

Detailed Description

The CSAT3A has the following outputs:

  • Ux (m/s)*

  • Uy (m/s)*

  • Uz (m/s)*

  • Sonic Temperature (°C)*

  • Sonic Diagnostic*

The EC150 has the following outputs:

  • CO2 Density (mg/m3)

  • H2O Density (g/m3)

  • Gas Analyzer Diagnostic

  • Ambient Temperature (°C)

  • Atmospheric Pressure (kPa)

  • CO2 Signal Strength

  • H2O Signal Strength

  • Source Temperature (°C)

*The first five outputs require the CSAT3A Sonic Anemometer Head.

 

Specifications

Operating Temperature Range

-30° to +50°C

Calibrated Pressure Range

70 to 106 kPa

Input Voltage

10 to 16 Vdc

Power

5 W (steady state and power up) at 25⁰C

Measurement Rate

60 Hz

Output Bandwidth

5, 10, 12.5, or 20 Hz (user-programmable)

Output Options

SDM, RS-485, USB, analog (CO2 and H2O only)

Auxiliary Inputs

Air temperature and pressure

Gas Analyzer/Sonic Volume Separation

5.0 cm (2.0 in.)

Warranty

3 years or 17,500 hours of operation (whichever comes first)

Cable Length

3 m (10 ft) from EC150 and CSAT3A to EC100

Weight

  • 2.0 kg (4.4 lb) for EC150 head and cables

  • 1.7 kg (3.7 lb) for CSAT3A head and cables

  • 3.2 kg (7.1 lb) for EC100 electronics

Gas Analyzer

Path Length

15.37 cm (6.05 in.) 
A temperature of 20°C and pressure of 101.325 kPa was used to convert mass density to concentration.

Gas Analyzer - CO2 Performance

-NOTE-

A temperature of 20°C and pressure of 101.325 kPa was used to convert mass density to concentration.

Accuracy

  • Assumes the following: the gas analyzer was properly zero and spanned using the appropriate standards; CO2 span concentration was 400 ppm; H2O span dewpoint was at 12°C (16.7 ppt); zero/span temperature was 25°C; zero/span pressure was 84 kPa; subsequent measurements made at or near the span concentration; temperature is not more than ±6°C from the zero/span temperature; and ambient temperature is within the gas analyzer operating temperature range.

  • 1% (standard deviation of calibration residuals)

Precision RMS (maximum)

0.2 mg/m3 (0.15 µmol/mol) 

Nominal conditions for precision verification test: 25°C, 86 kPa, 400 μmol/mol CO2, 12°C dewpoint, and 20 Hz bandwidth.

Calibrated Range

0 to 1,000 μmol/mol (0 to 3,000 µmol/mole available upon request.)

Zero Drift with Temperature (maximum)

±0.55 mg/m3/°C (±0.3 μmol/mol/°C)

Gain Drift with Temperature (maximum)

±0.1% of reading/°C

Cross Sensitivity (maximum)

±1.1 x 10-4 mol CO2 /mol H2O

Gas Analyzer - H2O Performance

-NOTE-

A temperature of 20°C and pressure of 101.325 kPa was used to convert mass density to concentration.

Accuracy

  • Assumes the following: the gas analyzer was properly zero and spanned using the appropriate standards; CO2 span concentration was 400 ppm; H2O span dewpoint was at 12°C (16.7 ppt); zero/span temperature was 25°C; zero/span pressure was 84 kPa; subsequent measurements made at or near the span concentration; temperature is not more than ±6°C from the zero/span temperature; and ambient temperature is within the gas analyzer operating temperature range.

  • 2% (standard deviation of calibration residuals)

Precision RMS (maximum)

0.004 g/m3 mmol/mol (0.006 mmol/mol) 

Nominal conditions for precision verification test: 25°C, 86 kPa, 400 μmol/mol CO2, 12°C dewpoint, and 20 Hz bandwidth.

Calibrated Range

0 to 72 mmol/mol (38°C dewpoint)

Zero Drift with Temperature (maximum)

±0.037 g/m3/°C (±0.05 mmol/mol/°C)

Gain Drift with Temperature (maximum)

±0.3% of reading/°C

Cross Sensitivity (maximum)

±0.1 mol H2O/mol CO2

Sonic Anemometer - Accuracy

Offset Error

  • < ±8.0 cm s-1 (for ux, uy)

  • < ±4.0 cm s-1 (for uz)

  • ±0.7° while horizontal wind at 1 m s-1 (for wind direction)

Gain Error

  • < ±2% of reading (for wind vector within ±5° of horizontal)

  • < ±3% of reading (for wind vector within ±10° of horizontal)

  • < ±6% of reading (for wind vector within ±20° of horizontal)

Measurement Precision RMS

  • 1 mm s-1 (for ux, uy)

  • 0.5 mm s-1 (for uz)

  • 0.025°C (for sonic temperature)

  • 0.6° (for wind direction)

Speed of Sound

Determined from 3 acoustic paths (corrected for crosswind effects)

Rain

Innovative ultrasonic signal processing and user-installable wicks considerably improve the performance of the anemometer under all rain events.

Ambient Temperature

Manufacturer

BetaTherm 100K6A1IA

Total Accuracy

±0.15°C (-30°C to +50°C)

 

Download

Brochures

EC150 CO2 and H2O Open-Path Gas Analyzer with Optional 3D Sonic Anemometer

Manuals

EC150 CO2 and H2O Open-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer

Open Path Eddy Covariance System with IRGASON or EC150/CSAT3A Quick Deploy Guide

EC150-GH Packing Information

EC150-SH Packing Information

Technical Papers

EC150, IRGASON, or EC155: Which CO2 and H2O Eddy-Covariance System Is Best for My Application?

EdiRe Software for Micrometeorological Applications

Miscellaneous

Using Molecular Sieve to Zero Infrared Gas Analyzers for Eddy Covariance or Atmospheric Profile Measurements

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