Campbell Scientific CSAT3 CSAT3 3-D Sonic Anemometer

Campbell Scientific CSAT3 Manual

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  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 1
    INSTRUCTION MANUAL CSAT3 Three Dimensional Sonic Anemometer Revision: 3/14 Copyright © 1998-2014 Campbell Scientific, Inc.
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 2
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 3
    BY CAMPBELL SCIENTIFIC, INC. are warranted by Campbell Scientific, Inc. ("Campbell") to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified in the corresponding Campbell pricelist or product manual
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - 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, INC at the customer's expense. Campbell Scientific reserves the right to refuse service on products that were exposed
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 5
    2. Specifications 1 2.1 Measurements 1 2.2 Output Signals 2 2.3 Physical Description 3 2.4 Power Requirements 4 3. Initial Setup 4 3.1 Factory Settings 4 3.2 DM Address 5 4. Installation 5 4.1 Orientation 5 4.2 Mounting 6 4.3 Leveling 8 4.4 Fine Wire Thermocouple 8 5. Wiring 8 6. CSAT3
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 6
    Table of Contents 10.1 CRBasic CSAT3 () Instruction 19 10.2 EDLOG SDM-CSAT3 (P107) Instruction 19 10.3 Datalogger Instruction Parameters 19 10.4 Diagnostic Word 22 10.5 SDMTrigger ()/SDM-Group Trigger (P110 23 10.6 Example CRBasic Datalogger Program 23 10.7 Example EDLOG Datalogger Program
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 7
    11-2. P/N 28902 CSAT3 Sonic Wick Spares Kit contents 39 11-3. CSAT3 running at 1 Hz and successfully communicating with the CSAT3 40 11-4. Recommended vertical axis labels 41 11-6. Wind data from CSAT3 s/n 315; wind offsets within specifications at 19°C 42 A-1. Magnetic declination for the
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 8
    Table of Contents iv
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 9
    can be measured using SDM (Synchronous Device for Measurements) communications and a Campbell Scientific, Inc. datalogger. All Campbell Scientific dataloggers that support the CSAT3 SDM instruction do so without a special operating system with the exception of the 21X and CR10, see TABLE 6-2 for
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 10
    2.2 Output Signals The CSAT3 can output data to a data retrieval system using any of the following communications: SDM (Synchronous Device for Measurement), RS-232, or analog output. All the output signals have a two scan delay. DIGITAL SDM: A Campbell Scientific, Inc. 33300 bps serial interface
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 11
    CSAT3 Three Dimensional Sonic Anemometer REPORTING RANGE: SDM and RS-232 digital Outputs: Full scale 0.64 cm (0.25 in) diameter TRANSDUCER MOUNTING ARMS: 0.84 cm (0.33 in) diameter SUPPORT ARMS: 1.59 cm (0.63 in) diameter DIMENSIONS: Anemometer Head: 47.3 cm (l) x 42.4 cm (h) (18.6 in x 16.7 in)
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 12
    CSAT3 Three Dimensional Sonic Anemometer 2.4 Power Requirements VOLTAGE SUPPLY: 10 to 16 Vdc POWER: 2.4 W @ 60 the CSAT3 PC support software (CSAT32.EXE), and the RS-232 cable. A copy of the CSAT3 PC support software is available from the Campbell Scientific web site in the Support|Downloads
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 13
    CSAT3 Three Dimensional Sonic Anemometer 3.2 DM Address Each CSAT3 on anemometer is pointing into the wind, it will report a positive ux wind. In general, point the anemometer into the prevailing wind to minimize the amount of data that is contaminated by the anemometer's arms and other supporting
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 14
    by the arms or the strut between the arms. Always hold the CSAT3 by the block, where the upper and lower arms connect. Older CSAT3s were mounted with a boom design. In this case, the sonic anemometer is mounted to a vertical 3/4" diameter US bore pipe with a 3/4" by 3/4" crossover fitting (p/n 1017
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 15
    CSAT3 Three Dimensional Sonic Anemometer 8915 CSAT3 Boom FIGURE 4-2. CSAT3 coordinate system and captive mounting hardware (s/n 0631 to current) FIGURE 4-3. CSAT3 coordinate system, captive mounting hardware, and cup washer (s/n 0107 to 0630) 7
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 16
    Dimensional Sonic Anemometer FIGURE 4-4. CSAT3 coordinate system and original noncaptive mounting hardware (s/n 0107 to 0630) 4.3 Leveling Over flat level terrain, adjust the anemometer head so that the bubble within the level is in the bullseye. Over sloping terrain, adjust the anemometer head
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 17
    Three Dimensional Sonic Anemometer CAUTION The CSAT3 electronics box contains unique calibration information for its respective sensor head. Do not mismatch CSAT3 sensor heads and electronics. Doing so will result in erroneous wind and speed of sound measurements. NOTE Before extending the SDM
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 18
    CSAT3 Three Dimensional Sonic Anemometer TABLE 5-4. CSAT3 SDM Output to a 21X Datalogger Channel Description Color Pin 1H SDM Data Green D C1 10 K resistor to 1H C2 SDM Clock White C C3 SDM Enable Brown E Digital Ground Black F Shield Clear nc TABLE 5-5. CSAT3 SDM Output to a CR9000
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 19
    CSAT3 Three Dimensional Sonic Anemometer TABLE 5-8. FW05/FWC-L35 Fine Wire Thermocouple Description Signal High Signal Low Color Purple Red 6. CSAT3 Outputs The CSAT3 has three signal outputs: SDM, RS-232, and analog. Campbell Scientific recommends that the SDM output be used when ever possible,
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 20
    CSAT3 Three Dimensional Sonic Anemometer TABLE 6-2. SDM Compatible Dataloggers CSAT3. The CRBasic datalogger instruction, CSAT3 () is used to communicate with the CSAT3 over the SDM bus. 6.1.2 EDLOG Dataloggers SDM is a Campbell Scientific communication protocol used between a Campbell Scientific
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 21
    Dimensional Sonic Anemometer 6.2 RS-232 Output The Windows PC support software (CSAT32.EXE) can be used to graph the CSAT3 data in real time or collect time series via the RS-232 serial port. A copy of the CSAT3 PC software is available from the Campbell Scientific web site in the Support|Downloads
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 22
    of the speed of sound measurement is still a factor of two better compared to any other commercially available sonic anemometer. Field comparisons of measurements made with a CSAT3 anemometer containing embedded code version 4 and one containing embedded code version 3 show that the new algorithm
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 23
    speed of sound, and as of the printing of this manual, the CSAT3 is the only commercially available sonic anemometer that corrects the speed of sound, and ultimately the sonic temperature, for the effects of wind blowing normal to the sonic measurement path. The equations derived by Schotanus et al
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 24
    CSAT3 Three Dimensional Sonic Anemometer 8. CSAT3 Trigger The CSAT3 takes a measurement of wind speed and the speed of sound when triggered from one of three different sources. The trigger sources are the internal CSAT3 timer, SDM communications, or RS-232 communications. In the case of the CSAT3
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 25
    Dimensional Sonic Anemometer FIGURE 8-1. Typical average CSAT3 current drain at +12 VDC FIGURE 8-2. CSAT3 pipeline delay 8.1 Sampling Modes The CSAT3 can be configured to make measurements in either a singlemeasurement mode or an oversampled mode. In the single-measurement mode, the CSAT3 makes
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 26
    CSAT3 Three Dimensional Sonic Anemometer 8.1.1 Single-Measurement Mode In the single-measurement mode, the anemometer makes one measurement per trigger. With this approach, the anemometer's high frequency response is limited only by the geometry of the anemometer head, thus minimizing the
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 27
    Three Dimensional Sonic Anemometer 10. Datalogger Programming using SDM The CRBasic CSAT3 () and EDLOG SDM-CSAT3 (P107) instructions are Input/Output instructions that control and retrieve data from the CSAT3. These instructions are available on the CR3000, CR1000, CR5000, CR800/850, CR9000(X), and
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 28
    CSAT3 Three Dimensional Sonic Anemometer CAUTION SDMAddress/SDM Address: The unique SDM Address of the CSAT3 connected to the datalogger. In CRBasic dataloggers, the CSAT3 address is entered as a base ten number. In EDLOG dataloggers, the CSAT3 address is entered as a base four number (see TABLE
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 29
    CSAT3 Three Dimensional Sonic Anemometer CAUTION Command/Option 90, 91, 98, or 99 must not be used to collect data from a CSAT3 running a cold shifted calibration, see Section 11.2.1. Option 1, 2, 3, 5, 6, 10, 12, 15, 20, 30, and 60: "Set Execution Parameter" tells the CSAT3 which measurement
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 30
    Sonic Anemometer Ux Input Location: The Input Location to store the first of five data values to an EDLOG datalogger. The CSAT3 10.6 and 10.7. The CSAT3 ()/SDM-CSAT3 instruction (P107), decodes the specific Diagnostic Words (Base 10) and the situation that produces them: NaN or -99999, Anemometer
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    anemometer path or on the transducer face. 10.5 SDMTrigger ()/SDM-Group Trigger (P110) A SDM Input/Output instruction that controls SDM devices that support the group trigger protocol, including the CSAT3 device specific instruction. For the CSAT3, the CSAT3 ()/SDM-CSAT3 (P107) Instruction with
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 32
    Output and a CR3000 Datalogger 'CR3000 Series Datalogger '28 December 2006 'Copyright (c) 2006 Campbell Scientific, Inc. All rights reserved. 'The following sensors are measured: ' 'CSAT3 three dimensional sonic anemometer 'The site attendant must load in several constants and calibration values
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 33
    Dimensional Sonic Anemometer ' ' ' (N) ' {-y} ' | ' | ' | ' | ' | ' (W) {+x X--- {-x} (E) ' / | \ ' CSAT3 Block | CSAT3 Transducers ' | ' | ' v ' {+y} ' (S) ' 'The program computes the compass wind direction, using the constant 'CSAT3_AZIMUTH, and a CSAT3 wind
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 34
    Three Dimensional Sonic Anemometer 'Wind directions and speed. Dim wnd_out(8) 'Alias wnd_out(1) = wnd_spd - in compass coordinate system, same as CSAT3. 'Alias wnd_out(2) = rslt_wnd_spd - in compass coordinate system, same as CSAT3. Alias wnd_out(3) = wnd_dir_compass 'Alias wnd_out(4) = std_wnd_dir
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 35
    CSAT3 Three Dimensional Sonic Anemometer Totalize (1,n,IEEE4,NOT (del_T_f) OR NOT (disable_flag_on(2))) FieldNames ("del_T_f_Tot") Totalize (1,n,IEEE4,NOT (sig_lck_f) OR NOT (disable_flag_on(2))) FieldNames ("sig_lck_f_Tot") Totalize (1,n,IEEE4,NOT (amp_h_f) OR NOT (disable_flag_on(2)))
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 36
    Three Dimensional Sonic Anemometer 'Break up the four CSAT3 warning flags into four separate bits. diag_csat_work = diag_csat del_T_f = diag_csat_work AND &h1000 'Turn on the intermediate processing disable flag when any CSAT3 warning flag is 'high, including the special cases NaN (61502), a Lost
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 37
    SDM Output and a CR23X Datalogger ;{CR23X} ; ;22 April 2001 ;Copyright (c) 2001 Campbell Scientific, Inc. All rights reserved. ;Flags ;Flag 1 - Set low (default) to configure the CSAT3. ;Set high after CSAT3 is configured. ;() -> Compass coordinate system ;{} -> Right handed coordinate system
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 38
    Three Dimensional Sonic Anemometer ;If the CSAT3 head is pointing West of North (above figure), ;theta is negative. If the CSAT3 head is pointing East of ;North, theta is positive. ; ;The site attendant must enter the value of theta. Search ;for the text string "unique value"
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 39
    CSAT3 Three Dimensional Sonic Anemometer ;Disable Intermediate Processing if any of the diagnostic flags are Compute the horizontal wind speed and wind direction in the ;compass coordinate system and in the CSAT3 right handed orthogonal ;coordinate system. ; 12: Wind Vector (P69) 1: 2 Reps 2:
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 40
    CSAT3 Three Dimensional Sonic Anemometer 17: Real Time (P77) 1: 110 Day,Hour/Minute (midnight = 0000) 18: Subroutine 1 ;Check the diagnostic word for lost trigger condition. ;Set Flag 1 low to reconfigure the CSAT3 if it is in a ;lost trigger state. ; 2: If (XF) (P89) 1: 5 X Loc
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 41
    CSAT3 Three Dimensional Sonic Anemometer ;Load the angle between North and the CSAT3 head. ;The station operator must Z Loc [ _1000h ] ;Look for a diag that is not -99999, meaning that the ;CSAT3 is connected to the CR23X and the two devices ;are communicating correctly. ; 9: If (XF) (P89
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    Three Dimensional Sonic Anemometer ;Configure CSAT3 with 10 Hz parameters. ; 12: SDM-CSAT3 (P107) 1: 1 Reps 2: 3 SDM Address 3: 10 Set Execution Parameter 4: 1 Ux Input Location [ Ux ] 13: End (P95) 14: End (P95) 15: End (P95) 16: End (P95) ;Each
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    CSAT3 Three Dimensional Sonic Anemometer 24: Z=X (P31) 1: 5 2: 30 X Loc [ diag ] Z Loc [ diag_work ] 25: If (XF) (P89) 1: 30 X Loc [ (track_f), amplitude high ;amp_h_f), or amplitude low (amp_l_f) flag high if the CSAT3 is ;reporting those flags as set. ; 29: Beginning of Loop (P87)
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    CSAT3 Three Dimensional Sonic Anemometer 36: End (P95) 37: End (P95) ;Process CSAT3 Output data. ; 38: Beginning of Subroutine (P85) 1: 3 Subroutine 3 ;Add the offset (theta) between the CSAT3 negative x-axis and ;North. ; 39: Z=X+Y (P33) 1: 14 X Loc [ cmpss_dir ] 2: 35 Y Loc [ theta
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    CSAT3 Three Dimensional Sonic Anemometer 46: End (P95) 47: End (P95) End Program -Input Locations1 Ux 2 Uy 3 Uz 32 _4000h 33 _2000h 34 _1000h 35 theta 36 diag_abs 11. Maintenance The CSAT3, like other ultrasonic anemometers, is unable to measure wind when water droplets completely obscure the face of
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 46
    Three Dimensional Sonic Anemometer CAUTION 11.1 Wicks Lightly dab the face of the transducers to remove water droplets. Applying excessive force on the face of the transducer may separate the matching layer from the brass housing. There are no user serviceable components on the CSAT3. The only
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 47
    Three Dimensional Sonic Anemometer FIGURE 11-2. P/N 28902 CSAT3 Sonic Wick Spares Kit contents 11.2 Calibration The CSAT3 is calibrated over the temperature range of -30° to +50°C (standard) or -40° to +40°C (cold shifted). The CSAT3 may or may not make measurements outside the calibration range
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 48
    the PC and the CSAT3. A copy of the software is available from the Campbell Scientific web site, in the Support|Downloads section. If successful communications are established, the "Status" window will report "Good Data". To prevent erroneous measurements due to ultra sonic reflection within the
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 49
    environment (FIGURE 11-6). The wind offset should be less than ± 4 cm s-1 (0.04 m s-1) for ux and uy, and less than ± 2 cm s-1 (0.02 m s-1) for uz. If the CSAT3 wind offset is greater than these specifications, contact Campbell Scientific, Inc. for an RMA number to recalibrate the
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 50
    CSAT3 Three Dimensional Sonic Anemometer FIGURE 11-6. Wind data from CSAT3 s/n 315; wind offsets within specifications at 19°C 12. Select Backdoor Commands The CSAT3 supports a variety of Backdoor Commands used to configure the CSAT3 for use with a RS-232 data collection system. Connect the CSAT3
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 51
    Three Dimensional Sonic Anemometer After receiving the "??" command, the CSAT3 will respond with text similar to that below for CSAT3s running SNnnnn - Serial Number of the calibration file stored in EEPROM, nnnn is the CSAT3 serial number; ddmmmyy - date that the calibration file was created, dd is
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 52
    CSAT3 Three Dimensional Sonic Anemometer deasserted, e.g. RS-232 communicates have terminated. The baud on the CSAT3 electronics box lid, is pointing towards the ceiling. These instructions reference the location of various components as top, bottom, left, and right. The Campbell Scientific logo is
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 53
    The orientation of the CSAT3 negative x-axis is found by reading a magnetic compass and applying the site-specific correction for magnetic declination of degrees between True North and Magnetic North. Magnetic declination for a specific site can be obtained from a USGS map, local airport, or through
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 54
    Appendix A. CSAT3 Orientation Declination angles are always subtracted from the compass reading to find True North. A declination angle East of True North is reported as positive a value
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 55
    Appendix A. CSAT3 Orientation A.2 Online Magnetic Declination Calculator The magnetic declination calculator web calculator published by NOAA's Geophysical Data Center is available at the following url: www.ngdc.
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    Appendix A. CSAT3 Orientation A-4
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    of the RTS line. The unprompted output mode (TABLE B-1) complicates anemometer data processing software, because the original output format contains no fixed pattern to delimit the CSAT3's 10 byte output record. To configure the CSAT3 to output 12-byte records, with the last two bytes being
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 58
    full-scale range in sync with the next trigger Trigger after Command CSAT3 timer PC2 PC2 CSAT3 timer CSAT3 timer No change No change No change No change 1 The CSAT3 will ignore this command if a datalogger (SDM) is triggering the anemometer. 2 After the PC takes over as the trigger source it must
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 59
    the PC is the Trigger Source and the data acquisition system. In FIGURE B-2, the anemometer is triggered by its internal timer and a PC is the data acquisition system. Use the logic in FIGURE B-1 when the CSAT3 is measured along with other analog/digital signals. FIGURE B-1. PC as the trigger source
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 60
    1.00 uz wind (m s-1) = word 2 ∗ 0.001 ∗ 2.00 Output Resolution (mm s-1) 0.25 0.50 1.00 2.00 The speed of sound reported by the CSAT3 is the average between the three sonic paths. The relationship to find the speed of sound is given in TABLE B-6. Word 3 must be converted to a base 10 representation
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 61
    Sonic signal amplitude too high b12 Sonic signal amplitude too low Comment The anemometer path length may have been altered or the anemometer head Word 4 hex base 10 F03F 61503 F000 61440 B.5 CSAT3 RS-232 Status Format The CSAT3 returns a 10 ASCII byte status in response to a "S" or
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 62
    to the S or P Command Byte 0 1 2 3 4 5-8 9 Description Trigger Source Execution Parameter Analog Range Data Status Terminal Mode CSAT3 Serial Number P or U 0 = CSAT3 Timer 0 = Off 0 = Good Data D = Normal Mode P = Prompted Value 1 = PC see TABLE B-1 1 = ±32 m s-1 1 = Acquiring Signals T = CSI
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 63
    uz, with the following: ux ua �uy� = A �ub� (4) uz uc where A is a 3 x 3 coordinate transformation matrix, that is unique for each CSAT3 and is stored in ROM memory. C.1.2 Temperature The sonically determined speed of sound can be found from the sum of the inverses of Eq. (1) and (2). The
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 64
    CSAT3 Measurement Theory The speed of sound in moist air is a function of temperature and humidity and is given by: C2 = γP⁄ρ = γRdTv = γRdT(1 + 0.61q) (6) where γ is the ratio of specific specific sonic virtual temperature and γd is the ratio of specific Wave Sonic Anemometer-Thermometer",
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 65
    CSAT3 Measurement Theory Liu, H., Peters, G., and Foken, T.: 2001, "New Equations for Sonic Temperature Variance and Buoyancy Heat Flux with an Omnidirectional Sonic Anemometer H. A. R.: 1983, "Temperature Measurement with a Sonic Anemometer and its Application to Heat and Moisture Fluxes", Boundary
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 66
    Appendix C. CSAT3 Measurement Theory C-4
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    the experiment. Copies of the SDM search programs for the CRBasic and EDLOG dataloggers (Section D.1 and D.2) are available on the Campbell Scientific web site in the Support|Downloads section. Run these programs if the datalogger is having problems communicating with CSAT3 (Section 10.4). D-1
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 68
    cable is used to connect a CR3000 datalogger and a single CSAT3 anemometer. Communication between the CR3000 and CSAT3 fails at the default SDM bit period of 30 µSec that using a SDM bit period of 50 µSec, in the SDMSpeed () instruction, did not cause the CR3000 to skip scans (Status Table), thus the
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 69
    is used to connect a CR23X datalogger and a single CSAT3 anemometer. Communication between the CR23X and CSAT3 fails at the default SDM clock rate. Thus, errors, would be using a value of 11 for the SDM clock parameter in Instruction Set SDM Clock (P115). However, to have a safety margin, a value of
  • Campbell Scientific CSAT3 | CSAT3 3-D Sonic Anemometer - Page 70
    Appendix D. SDM Communications and Long Signal Cables D-4
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    Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • [email protected] Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • [email protected] Campbell Scientific
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INSTRUCTION MANUAL
CSAT3 Three Dimensional
Sonic Anemometer
Revision: 3/14
Copyright © 1998-2014
Campbell Scientific, Inc.