Das EC150 von Campbell Scientific ist ein open-path Gasanalysator speziell für Eddy-Kovarianzmessungen. Er misst simultan absolute Kohlendioxid- und Wasserdampfdichte, Lufttemperatur und Luftdruck. Mit dem optionalen CSAT3-Ultraschallanemometerkopf misst es auch dreidimensionale Windgeschwindigkeit und Ultraschall-Temperatur.
Lesen Sie mehrThe CSAT3A has the following outputs:
The EC150 has the following outputs:
*The first five outputs require the CSAT3A Sonic Anemometer Head.
Operating Temperature Range | -30° to +50°C |
Calibrated Pressure Range | 70 to 106 kPa |
Input Voltage Range | 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 |
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Gas Analyzer |
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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 |
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-NOTE- | A temperature of 20°C and pressure of 101.325 kPa was used to convert mass density to concentration. |
Accuracy |
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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 |
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-NOTE- | A temperature of 20°C and pressure of 101.325 kPa was used to convert mass density to concentration. |
Accuracy |
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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 |
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Offset Error |
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Gain Error |
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Measurement Precision RMS |
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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 |
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Manufacturer | BetaTherm 100K6A1IA |
Total Accuracy | ±0.15°C (-30°C to +50°C) |
EC100 ingress protection | IP65 |
CR6 datalogger program for Campbell open-path eddy-covariance systems.
EC100-Series Support Software.
EC100 Operating System.
Watch the Video Tutorial: Updating the EC100 Operating System.
A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.
Supported Operating Systems:
Windows 11 or 10 (Both 32 and 64 bit)
The CSAT3H Heater Controller ships with this encrypted program. This program is for the unlikely event that the program needs to be re-installed or updated to a newer version. Please contact Campbell Scientific if you have questions about the program or would like the algorithm modified for a specific application.
The CSAT3H Heater Controller ships with this encrypted program. This program is for the unlikely event that the program needs to be re-installed or updated to a newer version. Please contact Campbell Scientific if you have questions about the program or would like the algorithm modified for a specific application.
CR1000X datalogger program for Campbell open-path eddy-covariance systems.
Number of FAQs related to EC150: 21
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The bottles of sieve for drop-in replacement contain the pellets and a membrane on top. The membrane is necessary to keep the pellets contained while allowing gas to pass over the zeolite. The bottle has the same footprint as the old magnesium perchlorate bottles. The amount in each bottle is listed on the bottle. The amount of sieve needed for each analyzer is the following:
The molecular sieve has been demonstrated here by our engineering department to be effective at removing CO2 and H2O from the air sample. The change was made for two reasons:
The molecular sieve is a non-hazardous material that can be shipped to any country.
The molecular sieve is a direct replacement for the old magnesium perchlorate bottles. The molecular sieve may be used for any Campbell Scientific analyzer that used the old bottles.
Yes. A fine-wire thermocouple, such as a FW05, can be used.
The EC150 and IRGASON® can report a negative water concentration if enough liquid water accumulates on the optical windows. This is because the absorption spectrum of liquid water differs from that of water vapor. Typically, large rain droplets do not cause this phenomenon. Rather, misty or condensing conditions, which create a water film across the entire optical window, can cause this phenomenon. After the water film evaporates, the former measurement accuracy will be restored.
The IRGASON® and EC150 may also experience some amount of drift over time. If conditions are relatively dry and it has been a long time since a zero and span has been performed on the analyzer, it is possible to report a negative water vapor concentration. In this situation, perform a zero and span of the analyzer.
The factory calibration accounts for CO2 and H2O signal strengths down to 0.7. Therefore, to ensure quality data, windows should be cleaned before signal strengths drop below 0.7.
For greatest accuracy, Campbell Scientific recommends that a zero and a span be done on the EC150 or IRGASON®. However, if a span gas is difficult to obtain, at the minimum, perform a zero on the analyzer. Performing a zero will correct the majority of drift experienced by the analyzer. Follow the zero procedure in the analyzer’s manual for details.
The IRGASON® is an integrated open-path gas analyzer and sonic anemometer, whereas the EC150 is a separate open-path gas analyzer that may be paired with a CSAT3A sonic anemometer. Both instruments provide measurements that are synchronous or simultaneous, made possible by having one set of electronics, the EC100, controlling the execution of both gas and wind measurements. With its integrated design, the IRGASON® is able to make measurements exactly colocated, which means that a spatial correction does not need to be applied to fluxes. Unlike the IRGASON®, the EC150 has measurement volumes that have a small separation, which means a spatial correction must be applied.
For more detailed information, see the white paper “EC150, IRGASON, or EC155: Which CO2 and H2O Eddy-Covariance System Is Best for My Application?”
Factory recalibration is done on an as-needed basis. When diagnostic flags begin to appear and persist even after cleaning the analyzer and verifying its settings, a recalibration is needed. Additionally, if the performance of the analyzer has degraded, a recalibration is recommended.
One performance test is to check the absolute signal strength drift over the course of 1 year. Drift of a few percent per year is normal. If the annual signal strength drift is excessive, or if the signal strength is below 0.7 when the windows are clean, a factory recalibration is needed. Furthermore, if the ratio of the CO2 to H2O signal strength is not close to one, it may also be time for a factory recalibration.