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Summary of Contents for Campbell EC150
- Page 1 EC150 CO and H O Open-Path Gas Analyzer Revision: 6/13 C o p y r i g h t © 2 0 1 0 - 2 0 1 3 C a m p b e l l S c i e n t i f i c ,...
- Page 3 Campbell pricelist or product manual. Products not manufactured, but that are re-sold by Campbell, are warranted only to the limits extended by the original manufacturer. Batteries, fine-wire thermocouples, desiccant, and other consumables have no warranty.
- Page 4 SCIENTIFIC, INC., phone (435) 227-9000. After an applications engineer determines the nature of the problem, an RMA number will be issued. Please write this number clearly on the outside of the shipping container. Campbell Scientific's shipping address is: CAMPBELL SCIENTIFIC, INC.
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Page 5: Table Of Contents
Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction ..............1 2. Cautionary Statements..........1 3. Initial Inspection ............2 4. Overview ..............2 5. - Page 6 EC150-SH Packing Information............D-2 Figures 5-1. Dimensions of EC150 analyzer head........... 6 6-1. Exploded view of mounting the CSAT3A sonic head and EC150 gas analyzer head ................8 6-2. Exploded view of mounting the EC150 gas analyzer head without the CSAT3A ..................8 6-3.
- Page 7 A-2. Frequency response comparison of the EC100 10-Hz bandwidth and a 50-msec moving average............ A-3 Tables 6-1. EC100 SDM output to a Campbell Scientific CR1000, CR3000, or CR5000 Datalogger..............13 7-1. Factory Default Settings..............14 8-1. USB and RS-485 Output Elements ............21 8-2.
- Page 8 Table of Contents...
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Page 9: Introduction
• WARNING: Do not carry the EC150 or CSAT3A by the arms or carry the EC150 by the strut between the arms. Always hold them by the block, where the upper and lower arms connect. Handle the EC150 carefully. The optical source may be damaged by rough handling, especially while the analyzer is powered. -
Page 10: Initial Inspection
The EC150 gas analyzer head, along with a temperature probe and optional external barometer, connect directly to the EC100 electronics. After receiving inputs from these sensors, the EC100 computes CO... - Page 11 EC150 CO and H O Open-Path Gas Analyzer These measurements are required to compute carbon dioxide and water vapor fluxes using the: • Standard outputs: density, H O density gas analyzer diagnostic flags air temperature, air pressure signal strength, H...
- Page 12 Measurement rate: 10 Hz Optional enhanced barometer Manufacturer: Vaisala Model: PTB110 Accuracy -30 to 0°C: ±0.15 kPa Measurement rate: 1 Hz EC150 temperature sensor: Manufacturer: BetaTherm Model: 100K6A1A Thermistor Accuracy: ±0.15 C (-30 to +50 noise rms, assumes: 25°C 85 kPa 14 g·m...
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Page 13: Output Signals
= 0.00865· (mV ) - 2.26 Full scale range: -2 to 41 g·m 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 Physical Description Optical measurement path length: 15.37 cm (6.05 in) -
Page 14: Power Requirements During Power-Up And Operation
Mounting The EC150 is supplied with mounting hardware to attach it to the end of a horizontal pipe of 1.31 inch outer diameter, such as the CM202, CM204, or CM206 crossarm (pn 1790x). The EC150 mounting hardware also accommodates an optional CSAT3A sonic anemometer. - Page 15 Point the horizontal arm into the direction of the prevailing wind. Tighten all the fitting set screws. WARNING Do not carry the EC150 or the CSAT3A by the arms or the strut between the arms. Always hold them by the block, where the upper and lower arms connect.
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Page 16: Exploded View Of Mounting The Csat3A Sonic Head And Ec150 Gas Analyzer Head
FIGURE 6-1. Exploded view of mounting the CSAT3A sonic head and EC150 gas analyzer head EC150 Gas Analyzer Head EC150 Head-Only Mounting Bracket (pn 26785) CM250 Leveling Mount (pn 26559) FIGURE 6-2. Exploded view of mounting the EC150 gas analyzer head without the CSAT3A... - Page 17 Over-tightening bolts will damage or deform the mounting hardware. d. If a CSAT3A is not being used, bolt the EC150 head-only mounting bracket (pn 26785) to the CM250 leveling mount (pn 26559) (see FIGURE 6-2). Mount the EC150 gas analyzer head to the EC150 head-only mounting bracket.
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Page 18: Ec100 Enclosure Mounting Bracket Mounted On A Vertical Mast (Left) And A Tripod Leg (Right)
EC150 CO and H O Open-Path Gas Analyzer FIGURE 6-3. EC100 enclosure mounting bracket mounted on a vertical mast (left) and a tripod leg (right) FIGURE 6-4. Exploded view of mounting the EC100 enclosure... -
Page 19: Wiring And Connections
O Open-Path Gas Analyzer g. Mount the EC150 temperature probe so that it measures temperature at the same height as the sample volume of the EC150 and CSAT3A. To do this, first attach the R.M. Young 41303-5A 6-plate solar radiation shield (pn 4020) to the mast with the included u-bolt. -
Page 20: Bottom Of Ec100 Enclosure
Now insert the cable entry plug that is attached to the large cable of the EC150 gas analyzer head into the vacant slot. Push the connector at the end of the cable onto its mating connector (labeled Gas Analyzer) and tighten the thumbscrews (see FIGURE 6-6). -
Page 21: Ec100 Sdm Output To A Campbell Scientific Cr1000, Cr3000, Or Cr5000 Datalogger
ESD (electrostatic discharge) protection and improve measurement accuracy. CAUTION Do not connect or disconnect the EC150 gas analyzer head or CSAT3 sonic head once the EC100 is powered. Connect a communications signal cable to the EC100. Loosen the nut on... -
Page 22: Settings
See Section 9, Maintenance). Settings Operation of the EC150 can be customized by changing the values of the settings. Factory defaults will work well for most applications, but the user may adjust the settings with a PC using either the ECMon software (see Section 7.3, ECMon) or the Device Configuration Utility (see Section 7.4,... -
Page 23: Details
This parameter must be set to use SDM output from the EC100. See Section 8.1, SDM Output for details on using SDM output. Each SDM device on the SDM bus must have a unique address. The EC150 has a factory default SDM address of 1, but may be changed to any integer value between 0 and 14. -
Page 24: Rs-485 Baud Rate
7.2.9 Fixed Temperature Value If the Temperature Sensor setting is None, the EC150 will use the value of this setting for the sample temperature. This mode is intended for troubleshooting only. -
Page 25: Pressure Gain
7.2.10.3 Fixed Pressure Value If the Pressure Sensor setting is None, the EC150 will use the value of this setting for the barometric pressure. This mode is intended for troubleshooting only. In normal operation this setting is not used. -
Page 26: The Main Screen In Ecmon
Besides changing settings, ECMon is also a useful tool for other common tasks such as: • Monitoring real-time data from the EC150 using the Main window • Performing a manual zero and span of the instrument (see Section 9.4, Zero and Span) •... -
Page 27: Device Configuration Utility
EC100 Outputs The EC100 outputs data in one of four types: SDM, USB, RS-485, or analog. In general Campbell Scientific recommends that SDM be used if a Campbell Scientific datalogger is responsible for data collection. However, RS-485 output is recommended over SDM if cable lengths exceed 100 meters. If a PC... -
Page 28: Sdm Output
CR5000 dataloggers, the SDM protocol uses SDM-dedicated ports SDM-C1, SDM-C2, and SDM-C3. Each SDM device on the SDM bus must have a unique address. The EC150 has a factory default SDM address of 1, but may be changed to any integer value between 0 and 14 (see Section 7.2.1, SDM Address). -
Page 29: An Example Of Usb Data Output In Terminal Mode
ASCII characters, casting them as Long data type. The signature is then calculated on the science data sent from the EC150, starting with CO ending on the counter. All the characters after the counter are not part of the signature. -
Page 30: Analog Outputs
H O Open-Path Gas Analyzer The following block of code is an example implementation of Campbell Scientific’s signature algorithm in the programming language C. To generate the signature of an output array of bytes, the seed needs to be initialized to 0xaaaa and a pointer passed to the first byte of the output array. -
Page 31: Maintenance
See TABLE 10-2 and TABLE 10-3. Gas Analyzer Wicks EC150 gas analyzer windows are polished and slanted at an angle to prevent water from collecting on their surfaces. However, due to increased surface tension at the interface with the snout, water can pool at the edges and partially block the optical path and attenuate the signal. -
Page 32: Analyzer Window Cleaning
EC150 CO and H O Open-Path Gas Analyzer The top wick has a short seam which has to be aligned with the short side of the top snout. The angled edge of the wick must closely follow the edge of the window without encroaching on the optical path (see FIGURE 9-1, Proper location of the sonic top wick and bottom wick). -
Page 33: Zero And Span
However, if the EC150 is being used at a site with large seasonal changes in ambient conditions, the zero-and-span procedure should be done at least seasonally. - Page 34 Connect the EC100 to a PC with the EC100 USB cable (pn 26561). Resume power to the EC100/EC150. Wait for all the Gas and Power LED status lights on the EC100 panel to turn green.
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Page 35: Ecmon Zero-And-Span Window
EC150 CO and H O Open-Path Gas Analyzer of CO being measured in the field. Begin with both the pressure regulator and flow controller turned off. Then use the pressure regulator to slowly increase pressure to the recommended setting for the flow controller. Next set the flow between 0.4 and 0.6 l/min. - Page 36 Enter the known dew point (in C°) in the box labeled Span Dew Point and press Span. q. The zero-and-span procedure is now complete. Remove the shroud, reconnect the EC150 temperature probe, and prepare the site for normal operation.
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Page 37: Replacing The Ec150 Desiccant/Co Scrubber Bottles
To do this, twist the scrubber bottle covers of the upper and lower arms counter To do this, twist the scrubber bottle covers of the upper and lower arms counter clockwise until they detach (they should loosen by hand). Remove the EC150 clockwise until they detach (they should loosen by hand). Remove the EC150... -
Page 38: Factory Recalibration
The instruction syntax is: EC100(Dest,SDMAddress,EC100Cmd) Dest is the input variable name in which to store the data from the EC150. The length (i.e., number of data elements) of the input variable array will depend on the selected value for EC100Cmd. A value of -99999 will be loaded into Dest(1) if a signature error on SDM data occurs. - Page 39 EC150 CO and H O Open-Path Gas Analyzer TABLE 10-1. Output Modes for EC100 Instruction Output Data Mode Field Description Units Sonic Temperature ºC 0, 1, 2, Sonic Diagnostic Flag Density mg/m O Density Gas Diagnostic Flag Air Temperature ºC...
- Page 40 EC150 CO and H O Open-Path Gas Analyzer TABLE 10-3. Bits in the Gas Diagnostic Flag hex value decimal Name Function Bad Data Data are suspect (there is an active diagnostic flag) Sys Fault General system fault Sys Startup Gas analyzer is starting up...
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Page 41: Ec100Configure() Instruction
This locking will likely result in skipped scans when reconfiguring an EC150. For the EC150 to save settings, it must go through a lengthy write-read-verify process. To avoid saving the settings after each set command, the result code can be used to determine if any settings were modified from their original value. - Page 42 Differential Pressure: 0 = Disable, 1 = Enable Fixed Pressure Value Pressure Offset Pressure Gain Temperature Sensor: 0 = EC150 Temperature Probe 1 = EC155 Sample Cell Thermistor 2 = EC155 Sample Cell Thermocouple 3 = None (use fixed value) 4 = Auto-Select...
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Page 43: Configcmd 11 Zero-And-Span Control
Then the Span/Zero Control setting is set to 3. After the EC150 completes the span, the span control setting is written as -3. ConfigCmds 14 through 17 automatically store the results of the zero-and- span procedure. -
Page 44: Example Crbasic Program
EC150 CO and H O Open-Path Gas Analyzer 10.3 Example CRBasic Program 'CR3000 Series Datalogger Public sonic_irga(12) Alias sonic_irga(1) = Ux Alias sonic_irga(2) = Uy Alias sonic_irga(3) = Uz Alias sonic_irga(4) = Ts Alias sonic_irga(5) = diag_sonic Alias sonic_irga(6) = CO2... -
Page 45: Theory Of Operation
O, radiation at 2.7 µm, corresponding to water’s symmetric stretching vibrational band, is used. The EC150 is a dual wavelength single beam analyzer; thus, rather than using a separate reference cell and detector, the initial intensity of the radiation is calculated by measuring the intensity of nearby, non-absorbing wavelengths (4 µm for CO... - Page 46 EC150 CO and H O Open-Path Gas Analyzer...
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Page 47: Filter Bandwidth And Time Delay
The EC100 electronics synchronously sample the EC150 analyzer and the CSAT3A sonic head. However, experimenters wishing to synchronize their EC100 data with other measurements (e.g., energy balance sensors) in the data acquisition system must account for the time delay of the EC100 filter. -
Page 48: Frequency And Amplitude Response Of The Ec100 Filter At Various
±3.333 ms (plus or minus one-half of the inverse of 100 Hz). Alternatively, when sending data to a non-Campbell data acquisition system, the EC100 down-samples its USB and RS-485 outputs to a user-selectable rate of 10, 25, or 50 Hz. -
Page 49: Frequency Response Comparison Of The Ec100 10-Hz Bandwidth And A 50-Msec Moving Average
Appendix A. Filter Bandwidth and Time Delay EC100 10-Hz Filter Compared to 20-msec Moving Average (Amplitude Responses) EC100 10-Hz Bandwidth Filter 10-Hz Bandwidth from a 50-msec Moving Average 0.01 0.001 0.0001 Hertz FIGURE A-2. Frequency response comparison of the EC100 10-Hz bandwidth and a 50-msec moving average TABLE A-1. - Page 50 Appendix A. Filter Bandwidth and Time Delay...
- Page 51 Appendix B. Useful Equations The following table lists all the variables and constants used in the equations below: Table of Variables and Constants Variable or Constant Description Units ρ Mass Density mg m ρ O Mass Density ρ Mass Density of Dry Air Molar Mixing Ratio µmol mol (concentration relative to dry air)
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Page 52: Useful Equations
Appendix B. Useful Equations ⎛ ⎞ ⎛ ⎞ ρ ⎟ ⎟ ⎜ ⎜ ⎟ ⎟ ⎜ ⎜ − (B-5) 1000 ⎝ ⎠ ⎝ ⎠ Dew Point from Molar Mixing Ratio (B-6) − ⎛ ⎞ ⎜ ⎜ ⎟ ⎟ (B-7) ⋅ 61121 f 1000 ⎝... -
Page 53: Material Safety Data Sheets (Msds
Appendix C. Material Safety Data Sheets (MSDS) C.1 Magnesium Perchlorate MSDS... -
Page 54: Decarbite Msds
Appendix C. Material Safety Data Sheets (MSDS) C.2 Decarbite MSDS... - Page 55 Appendix C. Material Safety Data Sheets (MSDS)
- Page 56 Appendix C. Material Safety Data Sheets (MSDS)
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Page 57: Packing Information
Appendix D. Packing Information D.1 EC150-GH Packing Information... -
Page 58: Ec150-Sh Packing Information
Appendix D. Packing Information D.2 EC150-SH Packing Information... - Page 60 Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • cleroux@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)
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