Campbell Scientific IRGASON IRGASON Integrated CO2/H2O Open-Path Gas Analyzer
Campbell Scientific IRGASON Manual
View all Campbell Scientific IRGASON manuals
Add to My Manuals
Save this manual to your list of manuals |
Campbell Scientific IRGASON manual content summary:
- Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 1
INSTRUCTION MANUAL IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer Revision: 6/14 Copyright © 2010-2014 Campbell Scientific, Inc. - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 2
- Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 3
CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual. (Product manuals are available for review online at www.campbellsci.com.) Products not manufactured by CSI - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 4
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 customer at the customer's expense. Campbell Scientific reserves the right to refuse service on products that were exposed - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 5
exceed design limits. Be familiar and comply with all instructions provided in product manuals. Manuals are available at www.campbellsci.com or by telephoning IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 6
- Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 7
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. Specifications 2 5.1 Measurements 2 5.2 Output - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 8
33 10. Datalogger Programming 34 10.1 EC100() Instruction 34 10.2 EC100Configure() Instruction 37 10.2.1 ConfigCmd 11 Zero-and-span Control Mounting the IRGASON Temperature Probe 11 EC100 electronics front panel with enhanced barometer. At left, as received from Campbell Scientific. At right - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 9
SDM Output to a Campbell Scientific CR1000, CR3000, or CR5000 Datalogger 14 7-1. Factory Default Settings 16 8-1. USB and RS-485 Output Elements 23 8-2. Multipliers and Offsets for Analog Outputs 25 9-1. Rain Wick Replacement Parts 27 10-1. Output Modes for EC100 Instruction 35 10-2. Bits in - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 10
Table of Contents iv - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 11
(MSDS) are provided in Appendix C. MSDS are updated periodically by chemical manufacturers. Obtain current MSDS at www.campbellsci.com. • WARNING: o Do not carry the IRGASON by the arms or the strut between the arms. Always hold it by the block, where the upper and lower arms connect. o Handle the - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 12
IRGASON diagnostic data. Be aware that the absence of diagnostic data in the analog output option could make troubleshooting difficult and may lead to the user not being aware of potential problems barometer. "IRGASON" and "EC100" are often used interchangeably in this manual. The IRGASON has been - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 13
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer These measurements are required to compute carbon dioxide and water vapor fluxes using the: • - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 14
Model: PTB110 Accuracy -30 to 0°C: ±0.15 kPa Measurement rate: 1 Hz IRGASON temperature sensor: Manufacturer: BetaTherm Model: Accuracy: 100K6A1A Thermistor ±0.15oC (-30o to wind speed - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 15
41 g·m-3 1 Synchronous Device for Measurement. A Campbell Scientific, Inc. proprietary serial interface for datalogger to from vertical: 30° Spatial separation between gas analyzer and sonic volumes: 0 cm Dimensions IRGASON Length: Height: Cable Length: EC100 Enclosure: 51.5 cm (20.3 in) 31.1 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 16
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer FIGURE 5-1. IRGASON dimensions, side view FIGURE 5-2. IRGASON dimensions, front view 6 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 17
the IRGASON should be leveled and pointed into the prevailing wind to minimize flow distortions from the instrument arms and other supporting IRGASON is supplied with mounting hardware to attach it to the end of a horizontal pipe with a diameter of 1.31 in., such as the Campbell Scientific - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 18
, slightly loosen the bolt that holds the mounting bracket on the boom adapter and adjust the assembly until the leveling bubble on top of the IRGASON block is within the bullseye. Retighten the bolt. 7. Attach the EC100 enclosure to the mast, tripod leg, or other part of the mounting structure. To - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 19
CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer IRGASON Mounting Bracket (pn 27496) IRGASON CM250 Leveling Mount (pn 26559) CM20X (pn 1790X) or equivalent crossarm FIGURE 6-1. Exploded view of mounting the IRGASON WARNING Over-tightening bolts will damage or deform the mounting - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 20
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer FIGURE 6-2. EC100-enclosure mounting bracket mounted on a vertical mast (left) and a tripod leg (right) FIGURE 6-3. Exploded view of mounting the EC100 enclosure 10 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 21
probe installation and specifications, refer to the Model 107 Temperature Probe manual, which is available at www.campbellsci.com. 9. Remove the 1. Find the thicker black cable coming from the block of the IRGASON. This is the IRGASON gas-analyzer cable. Connect this cable to the EC100 electronics by - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 22
CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer 2. Connect the IRGASON sonic cable. Similar to (a), begin by removing the black- rubber cable EC100 electronics front panel with enhanced barometer. At left, as received from Campbell Scientific. At right, all wiring and connections complete. 12 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 23
Gas Analyzer and 3D Sonic Anemometer FIGURE 6-6. Base of EC100 enclosure NOTE Unique calibration information is stored in the gas and sonic connectors of the IRGASON rather than in the EC100. This means that any IRGASON may be used with any EC100. FIGURE 6-7. Sensor connections to EC100 13 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 24
and screw it firmly in place. The IRGASON temperature probe cable is approximately 3 meters on grounding, see the CR3000 datalogger manual, grounding section. Grounding electronics such panel. TABLE 6-1. EC100 SDM Output to a Campbell Scientific CR1000, CR3000, or CR5000 Datalogger EC100 Channel - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 25
most applications, but the user may adjust the settings with a PC using either the Campbell Scientific ECMon software (see Section 7.14, ECMon) or DevConfig (see Section 7.15, Device Configuration Utility), or with a datalogger using the EC100Configure() instruction (see Section 10.2, EC100Configure - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 26
disabled RS-485 baud rate 115200 bps Unprompted Output Rate 10 Hz Analog Output disabled ECMon Update Rate 10 Hz Temperature Sensor Auto-Select (IRGASON Temp Sensor) Pressure Sensor EC100 Basic or EC100 Enhanced (depending on order) Pressure Differential Enable Auto-Select (Disabled for - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 27
used, or the temperature sensor may be selected manually. 7.10 Fixed Temperature Value If the Temperature Sensor setting is None, the IRGASON will use the value of this setting for the sample temperature. This mode is intended for troubleshooting only. In normal operation, Temperature Sensor is set - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 28
use a fixed (see below) value for pressure. This mode is intended for troubleshooting only. 7.11.1 Pressure Gain If Pressure Sensor is set to User Supplied, this for closed-path analyzers. 7.13 Heater Control An advantage of the IRGASON's low power consumption (5W) is that the instrument remains at - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 29
, may be found at the end of Section 10.2, EC100Configure() Instruction. Settings for the IRGASON are easily verified or changed using the Windows PC support software ECMon (Eddy Covariance Monitor), which is found on the IRGASON, EC150 & EC155 Support CD (pn 27007) or at www.campbellsci.com. Before - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 30
useful tool for common tasks such as: • Monitoring real-time data from the IRGASON from the main window • Performing manual zero and span of the instrument (see Section 9.4, Zero and Span) • Troubleshooting and monitoring diagnostics using the Status window. FIGURE 7-1. Main window of ECMon software - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 31
preferred because of its more user-friendly interface. DevConfig may be downloaded from the IRGASON, EC150 & EC155 Support CD (pn 27007), or may be downloaded free of charge from the Campbell Scientific website www.campbellsci.com). DevConfig requires a USB driver to communicate with the EC100 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 32
user in the datalogger program. CRBasic, the programming language used by Campbell Scientific dataloggers, uses the EC100() instruction to get data from an IRGASON. This instruction is explained in detail under Section 10.1, EC100() Instruction. 8.2 USB or RS-485 Output In contrast to the SDM output - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 33
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer To use USB or RS-485 output, connect a USB or RS-485 cable from - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 34
on the science data sent from the IRGASON, starting with CO2 and ending on the Following is an example implementation of Campbell Scientific's signature algorithm in the programming language troubleshooting difficult if the user is not aware of potential problems with the instrumentation. 24 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 35
old desiccant packs may be recharged by heating in an oven. See the manual ENC10/12, ENC12/14, ENC14/16, ENC16/18, available at www.campbellsci.com faces. As soon as the water droplets evaporate or are removed, the IRGASON will again measure wind. Remove the water droplets by dabbing a cotton swab - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 36
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer Wick Spares Kit (pn 28902) consists of three top wicks, three bottom wicks, adhesive, - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 37
Parts Wick Bottom Wick Top Wick Campbell Scientific, Inc. Part Number Campbell Scientific Description 28652 FAB EC150/IRGASON RAIN WICK BOTTOM 28653 FAB EC150/IRGASON RAIN WICK TOP The top wick using a datalogger (see Section 10.2, EC100Configure() Instruction, for more details). 27 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 38
environmental conditions in which the instrument is making measurements. Campbell Scientific recommends that a new instrument, or an instrument that appropriate time interval between zero and span procedures. However, if the IRGASON is being used at a site with large seasonal changes in ambient - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 39
alcohol and any residual water completely evaporate from the analyzer before proceeding with the zero-and-span procedure. 3. As shown in FIGURE 9-4, position the IRGASON zero-and-span shroud (pn 26390) over the upper and lower snouts. To do this, twist the two ends of the shroud together to minimize - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 40
. The top tube is the gas intake, the black cable is the temperature thermistor, and the short bottom tube is the gas exhaust. 4. Disconnect the IRGASON temperature sensor from the EC100 and connect the shroud temperature sensor in its place. 5. Connect the EC100 to a PC with the EC100 USB cable (pn - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 41
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer NOTE Use mixtures of CO2 and ambient air for the CO2 span gas. The - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 42
in the box labeled Span Dew Point and press Span. 17. The zero-and-span procedure is now complete. Remove the shroud, reconnect the IRGASON® temperature probe, and prepare the site for normal operation. 9.5 Replacing Desiccant and Scrubber Bottles If more than two years have passed since replacing - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 43
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 IRGASON chemical bottles (pn 26510) from inside the covers, and replace them with new bottles lid-first (see FIGURE 9-6). Once this is done, firmly screw - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 44
is deemed necessary, contact Campbell Scientific. The IRGASON sonic anemometer also undergoes an Campbell Scientific. 10. Datalogger Programming The datalogger is programmed in the CRBasic language, which features two instructions for communication with the EC100 via SDM. The first instruction - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 45
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer TABLE 10-1. Output Modes for EC100 Instruction Output Data Mode Field 1 2 3 4 0, 1, 2, 5 6 7 8 9 10 1, 2 11 12 2 13 Description Ux Uy Uz Sonic Temperature Sonic Diagnostic Flag CO2 Density H2O Density Gas Diagnostic - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 46
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer TABLE 10-3. Bits in the Gas Diagnostic Flag bit hex value decimal 0 0x1 1 1 0x2 2 2 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 47
sequencer needs to run while the SDM is locked, it will be held off until the instruction completes. This locking will likely result in skipped scans when reconfiguring an IRGASON. For the IRGASON to save settings, it must go through a lengthy write-readverify process. To avoid saving the settings - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 48
, 3 = none (use fixed value) Differential pressure: 0 = disable, 1 = enable Fixed pressure value Pressure offset Pressure gain Temperature sensor: 0 = IRGASON/EC150 temperature probe 1 = EC155 sample cell thermistor 2 = EC155 sample cell thermocouple 3 = None (use fixed value) 4 = Auto-select Fixed - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 49
in the SDM task, thus avoiding skipped scans. When using ConfigCmd 218, the command must be a constant and the instruction cannot be placed in a conditional statement. The IRGASON includes heaters near the optical windows. This setting gives the voltage applied to the heater. It can be set to - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 50
Open-Path Gas Analyzer and 3D Sonic Anemometer output indicates moisture is present, the datalogger can send the EC100Configure() instruction to the IRGASON and enable the heaters. 10.3 Example CRBasic Program 'CR3000 Series Datalogger Public sonic_irga(12) Alias sonic_irga(1) = Ux Alias sonic_irga - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 51
® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer 11. Theory of Operation 11.1 IRGASON Sonic Anemometer The CSAT3 measures wind speeds and the speed of sound by determining the time of flight of sound between pairs of transducers. However, - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 52
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer 11.1.2 Temperature The sonically determined speed of sound can be found from the sum - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 53
temperature, in degrees Celsius, is given by Eq. (9), where γd = 1.4 and Rd = 287.04 J·K-1·kg-1. c2 Ts = γ dRd − 273.15 (9) 11.2 IRGASON Gas Analyzer The IRGASON gas analyzer is a non-dispersive mid-infrared absorption analyzer. Infrared radiation is generated in the upper arm of the analyzer - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 54
IRGASON® Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer 11.3 Theory References Kaimal, J. C. and Businger, J. A.: 1963, "A Continuous Wave Sonic Anemometer-Thermometer", J. Applied Meteorol., 2, - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 55
to avoid attenuation of flux-carrying signals. The EC100 electronics synchronously sample the gas analyzer and sonic anemometer of the IRGASON. However, experimenters wishing to synchronize their EC100 data with other measurements (e.g., energy balance sensors) in the data acquisition system must - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 56
Appendix A. Filter Bandwidth and Time Delay The EC100 measures gas and wind data at 100 Hz, and 100 Hz data are downsampled to the datalogger scan rate through SDM communications (see Section 8, EC100 Outputs). This process synchronizes EC100 gas and wind data with other signals measured by the - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 57
No Units Appendix A. Filter Bandwidth and Time Delay EC100 10-Hz Filter Compared to 20-msec Moving Average (Amplitude Responses) 10 1 0.1 0.01 EC100 10-Hz Bandwidth Filter 10-Hz Bandwidth from a 50-msec Moving Average 0.001 0.0001 1 10 70 Hertz FIGURE A-2. Frequency response comparison of - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 58
Appendix A. Filter Bandwidth and Time Delay A-4 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 59
Appendix B. Equations TABLE B-1 lists variables and constants used in the following equations. TABLE B-1. Table of Equation Variables and Constants Variable or Constant ρ c ρ v ρ d X c X v M c M d M v P R T e f T d Td _ tmp Description CO2 Mass Density H2O Mass Density Mass Density of Dry Air - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 60
Appendix B. Equations ρ d R(T PM d + 273.15) 1 − Xv 1000 + Xv (B-5) Dew Point from Molar Mixing Ratio Td = 240.97 Td _tmp 17.502 − Td _tmp Td _ tmp = ln XvP 0.61121⋅ f (1000 + Xv ( ) ( ) f = 1.00072 + 3.2×10−5 P + 5.9×10−9 PT 2 (B-62) (B-72) (B-82) Water Vapor - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 61
Appendix C. Material Safety Data Sheets (MSDS) MSDS are available for chemicals used in IRGASON filters. The MSDS samples below are made available for convenience. However, chemical manufacturers may change MSDS at any time. Up-to-date MSDS are available - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 62
Appendix C. Material Safety Data Sheets (MSDS) C.2 Decarbite MSDS C-2 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 63
Appendix C. Material Safety Data Sheets (MSDS) C-3 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 64
Appendix C. Material Safety Data Sheets (MSDS) C-4 - Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 65
- Campbell Scientific IRGASON | IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 66
Australia Pty. Ltd. (CSA) PO Box 8108 Garbutt Post Shop QLD 4814 AUSTRALIA www.campbellsci.com.au • [email protected] Campbell Scientific (Beijing) Co., Ltd. 8B16, Floor 8 Tower B, Hanwei Plaza 7 Guanghua Road Chaoyang, Beijing 100004 P.R. CHINA www.campbellsci.com • [email protected]
INSTRUCTION MANUAL
IRGASON
®
Integrated CO
2
/H
2
O
Open-Path Gas Analyzer and
3D Sonic Anemometer
Revision: 6/14
Copyright © 2010-2014
Campbell Scientific, Inc.