system composition

Data collector（CR3000 and storage unit, integrated ultrasonic anemometer and CO2/H2O analyzer (IRGASON), air temperature and humidity probe (HMP155A), professional software, system power supply unit and system bracket, etc;

performance

Data collection unit:

Maximum Scan Rate100Hz; 28 analog input channels; 4 pulse channels with voltage and current excitation functions; 16 bit A/D conversion; Storage capacity 2G (can be expanded up to 16G at most); Working temperature: -25 ° C to 50 ° C (expandable -40 ° C to 85 ° C); It has custom programming function, can perform online flux calculation, can expand network ports, and is compatible with various standard output sensors;

Three dimensional wind:

outputUx, Uy, Uz, C (sound velocity), programmable measurement frequency of 1-60Hz, horizontal airflow range of 65m/s, vertical airflow range of 8m/s, wind speed measurement error: Ux, Uy is<± 8cm/s, Uz is<± 4cm/s, measurement resolution Ux, Uy is 1mm/s, Uz is 0.5mm/s, virtual temperature resolution 0.025 ℃, output mode SDM, RS-232, and analog output are optional.

CO₂/H₂O analyzer:

Factory calibration range:CO₂：0～1830 mg/m3（0～1000 ppm)，H₂O：0～42 g/m3， Environmental temperature: -30 ° C to+50 ° C, pressure: 75 to 105 kPa

CO₂Performance:

Zero temperature drift (maximum):±0.55mg/m3/℃（±0.3μmol/mol/℃）

Gain temperature drift (maximum): reading of±0.1%/℃

relativeH2O sensitivity (maximum): ± 5.6 × 10^-5molCO₂/molH₂O

H₂O Performance:

Zero temperature drift (maximum):±0.037g/m3/℃（±0.05mmol/mol/℃）

Gain drift (maximum): reading of±0.3%/℃

Relative CO₂Sensitivity (maximum): ± 0.05molH2O/molCO₂

Air temperature and humidity:Working temperature:-80~60℃

Temperature range:-80~60℃； Accuracy (at 20 ℃): ± 0.17 ℃ (using analog output); ± 0.12 ℃ (using digital output)

Relative humidity range:0~100% RH; Accuracy (15~25 ℃): ± 1% (0~90% RH), ± 1.7% (90~100% RH);

Field data acquisition chassis：

Made of glass fiber synthetic anti-corrosion polyester processing, it can be used to place data collectors and some external devices.

Output original parameters

Ux (m/s)，Uy (m/s)，Uz (m/s)， Ultrasonic virtual temperature (° C), diagnostic value of ultrasonic anemometer, CO₂Concentration (mg/m3),H₂OConcentration (g/m3), gas analysis diagnostic value, atmospheric temperature (° C), atmospheric pressure (kPa), CO₂Signal strength,H₂OSignal strength, light source temperature (° C), detector temperature (° C), infrared light source operating time (hours)

Comes with atmospheric pressure accuracy:± 1.5kPa (basic type), ± 0.15 kPa (reinforced type)

Comes with air temperature accuracy:±0.15℃（-30℃～50℃）
Collection software

Loggernet is Campbell's most comprehensive data collector support software, which can help you achieve almost all tasks you need to customize your data collector. Through Loggernet, users can write data acquisition programs, send/receive programs, download data, view real-time data, and analyze historical data.

major function

Ø Support connecting allCR series data acquisition

Ø useShortCut, Edlog, and CRBasic programming tools are used to create and edit working programs for data collectors

Ø You can download data as required (select the data table to download, data for a certain period of time, specific record number data)

Ø Support timed automatic data download

Ø Data can be downloaded through any communication method and supports mixed communication

Ø Real time data can be monitored in the form of numbers or graphs, supporting simultaneous display of multiple tables

Ø pass throughRTMC tool can edit graphical window monitoring data and data acquisition status

Ø Packbus routing function

Ø The SMS tool can download data from data acquisition storage modules such as SM4M and SM16M to a PC, while the CConvert tool converts data stored in CF cards to a PC.

Data processing software

The main software packages currently used for processing vortex related data includeEdiRE、EddyPro、TK3、

Alteddy、ECPack、EddySoft、eth-flux、TUDD。 Flux calculation that can be used to calculate eddy covariance, calculate raw data, and provide complete flux output, including CO₂、H₂O. CH4 and energy flux, etc.

Optional configuration: Energy balance system

The closure status of energy balance is an important reference indicator for evaluating flux observation data, and all ground air exchange modes are based on the basic principles of energy and material balance. The available energy near the ground, i.e. the difference between net radiation (Rn) and soil heat flux (G) (sometimes considering vegetation canopy heat storage S, etc.), should be proportional to the allocated sensible heat flux (H) and latent heat flux（The sum of λ E, where E represents evapotranspiration and λ represents latent heat of vaporization, is equal.

The indicators required for energy balance measurement can be perfectly combined with the eddy covariance system, and all data collection is completed by the same data acquisition unit, ensuring the integrity of the system and the synchronization of all data, greatly facilitating the subsequent data processing process.

Energy balance configuration:High precision four component net radiation meter, soil heat flux plate, soil moisture, soil thermal balance probe（TCAV）， Surface temperature sensors, etc;

◆be careful:The closure degree of energy largely depends on the measurement accuracy and stability of the selected instruments. The probes we choose are selected based on the usage of domestic scientific research users over the years, and have high accuracy and good stability performance.

If you need to know more about the product details, you can contact the sales personnel of Xi'an Saimo Rui Environmental Technology Co., Ltd. The contact information can be found at the bottom of the website.