Campbell FW05 Handbuch

CSAT3 Three DimensionalSonic AnemometerRevision: 9/12Copyright © 1998-2012Campbell Scientific, Inc.

CSAT3 Three Dimensional Sonic Anemometer 2 to apply the speed of sound correction described by Liu et al., 2001. The CSAT3 can be configured to make

CSAT3 Three Dimensional Sonic Anemometer 3 REPORTING RANGE: SDM and RS-232 digital Outputs: Full scale wind: ±65.535 m s-1 autoranging between four r

CSAT3 Three Dimensional Sonic Anemometer 4 2.4 Power Requirements VOLTAGE SUPPLY: 10 to 16 Vdc POWER: 2.4 W @ 60 Hz measurement frequency 1.2 W @ 2

CSAT3 Three Dimensional Sonic Anemometer 5 3.2 DM Address Each CSAT3 on the SDM bus must have a unique address. A hex thumb switch within the electr

CSAT3 Three Dimensional Sonic Anemometer 6 4.2 Mounting The current mounting configuration for the CSAT3 includes a CM250 Leveling Mount, which shoul

CSAT3 Three Dimensional Sonic Anemometer 7 10.00 cmYZXLogan, Utah CSAT33-D SONIC ANEMOMETERS/N: 102MADE IN USA60o FIGURE 4-2. CSAT3 coordinate system

CSAT3 Three Dimensional Sonic Anemometer 8 10.00 cmYZXLogan, Utah CSAT33-D SONIC ANEMOMETERS/N: 102MADE IN USA60o FIGURE 4-4. CSAT3 coordinate system

CSAT3 Three Dimensional Sonic Anemometer 9 The CSAT3 electronics box contains unique calibration information for its respective sensor head. Do not m

CSAT3 Three Dimensional Sonic Anemometer 10 TABLE 5-4. CSAT3 SDM Output to a 21X Datalogger Channel Description Color Pin 1H SDM Data Green D C1

CSAT3 Three Dimensional Sonic Anemometer 11 TABLE 5-8. FW05/FWC-L35 Fine Wire Thermocouple Description Color Signal High Purple Signal Low Red 6

CSAT3 Three Dimensional Sonic Anemometer 12 TABLE 6-2. SDM Compatible Dataloggers Datalogger Model Datalogger PROMs or Operating System (OS) Require

CSAT3 Three Dimensional Sonic Anemometer 13 6.2 RS-232 Output The Windows PC support software (CSAT32.EXE) can be used to graph the CSAT3 data in rea

CSAT3 Three Dimensional Sonic Anemometer 14 signal processing techniques result in more accurate, lower noise measurements. Unlike CSAT3s running embe

CSAT3 Three Dimensional Sonic Anemometer 15 only by the spacing between transducers but also by the current wind speed and speed of sound conditions.

CSAT3 Three Dimensional Sonic Anemometer 16 8. CSAT3 Trigger The CSAT3 takes a measurement of wind speed and the speed of sound when triggered from o

CSAT3 Three Dimensional Sonic Anemometer 17 FIGURE 8-1. Typical average CSAT3 current drain at +12 VDC MiMi + 1Mi + 2Mi + 3Pi - 1Si - 2PiSi - 1Pi +

CSAT3 Three Dimensional Sonic Anemometer 18 8.1.1 Single-Measurement Mode In the single-measurement mode, the anemometer makes one measurement per tr

CSAT3 Three Dimensional Sonic Anemometer 19 10. Datalogger Programming using SDM The CRBasic CSAT3 () and EDLOG SDM-CSAT3 (P107) instructions are Inp

CSAT3 Three Dimensional Sonic Anemometer 20 SDMAddress/SDM Address: The unique SDM Address of the CSAT3 connected to the datalogger. In CRBasic data

CSAT3 Three Dimensional Sonic Anemometer 21 Command/Option 90, 91, 98, or 99 must not be used to collect data from a CSAT3 running a cold shifted cal

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CSAT3 Three Dimensional Sonic Anemometer 22 Ux Input Location: The Input Location to store the first of five data values to an EDLOG datalogger. The

CSAT3 Three Dimensional Sonic Anemometer 23 data condition also occurs when the datalogger’s execution frequency (inverse of the execution interval) i

CSAT3 Three Dimensional Sonic Anemometer 24 TABLE 10-7. Wiring for Program Example 1 Description Color CR3000 SDM Data Green SDM-C1 SDM Clock Wh

CSAT3 Three Dimensional Sonic Anemometer 25 ' ' ' (N) ' {-y} '

CSAT3 Three Dimensional Sonic Anemometer 26 'Wind directions and speed. Dim wnd_out(8) 'Alias wnd_out(1) = wnd_spd - in compass coordinate s

CSAT3 Three Dimensional Sonic Anemometer 27 Totalize (1,n,IEEE4,NOT (del_T_f) OR NOT (disable_flag_on(2))) FieldNames ("del_T_f_Tot") Tot

CSAT3 Three Dimensional Sonic Anemometer 28 'Break up the four CSAT3 warning flags into four separate bits. diag_csat_work = diag_csat de

CSAT3 Three Dimensional Sonic Anemometer 29 TABLE 10-8. Wiring for Program Example 2 Description Color CR3000 SDM Data Green SDM-C1 SDM Clock W

CSAT3 Three Dimensional Sonic Anemometer 30 ;If the CSAT3 head is pointing West of North (above figure), ;theta is negative. If the CSAT3 head is poin

CSAT3 Three Dimensional Sonic Anemometer 31 ;Disable Intermediate Processing if any of the diagnostic flags are ;on,vi.e. diag >= 4096 or any of th

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CSAT3 Three Dimensional Sonic Anemometer 32 17: Real Time (P77) 1: 110 Day,Hour/Minute (midnight = 0000) 18: Resolution (P78) 1: 1 High Res

CSAT3 Three Dimensional Sonic Anemometer 33 ;Load the angle between North and the CSAT3 head. ;The station operator must enter the angle theta. ; 4:

CSAT3 Three Dimensional Sonic Anemometer 34 ;Configure CSAT3 with 10 Hz parameters. ; 12: SDM-CSAT3 (P107) 1: 1 Reps 2: 3 SDM Address 3: 10

CSAT3 Three Dimensional Sonic Anemometer 35 24: Z=X (P31) 1: 5 X Loc [ diag ] 2: 30 Z Loc [ diag_work ] 25: If (X<=>F) (P89)

CSAT3 Three Dimensional Sonic Anemometer 36 36: End (P95) 37: End (P95) ;Process CSAT3 Output data. ; 38: Beginning of Subroutine (P85) 1: 3

CSAT3 Three Dimensional Sonic Anemometer 37 46: End (P95) 47: End (P95) End Program -Input Locations- 1 Ux 2 Uy 3 Uz 4 Ts 5 diag 6 _________ 7 __

CSAT3 Three Dimensional Sonic Anemometer 38 Lightly dab the face of the transducers to remove water droplets. Applying excessive force on the face of

CSAT3 Three Dimensional Sonic Anemometer 39 INSTANT ADHESIVE FIGURE 11-2. P/N 28902 CSAT3 Sonic Wick Spares Kit contents 11.2 Calibration The CSAT3

CSAT3 Three Dimensional Sonic Anemometer 40 The standard datalogger instruction reports either the speed of sound (c), option 90 or 99, or the sonic t

CSAT3 Three Dimensional Sonic Anemometer 41 FIGURE 11-4. Recommended settings for the wind vertical axis FIGURE 11-5. Recommended settings for the

i 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 sp

CSAT3 Three Dimensional Sonic Anemometer 42 FIGURE 11-6. Wind data from CSAT3 s/n 315; wind offsets within specifications at 19°C 12. Select Backdo

CSAT3 Three Dimensional Sonic Anemometer 43 After receiving the “??” command, the CSAT3 will respond with text similar to that below for CSAT3s runnin

CSAT3 Three Dimensional Sonic Anemometer 44 be changed if RI=1 (always power the RS-232 drivers). Check the setting of RI in the Long Status Message.

A-1 Appendix A. CSAT3 Orientation A.1 Determining True North and Sensor Orientation The orientation of the CSAT3 negative x-axis is found by readin

Appendix A. CSAT3 Orientation A-2 Declination angles are always subtracted from the compass reading to find True North. A declination angle East of T

Appendix A. CSAT3 Orientation A-3 A.2 Online Magnetic Declination Calculator The magnetic declination calculator web calculator published by NOAA’s

Appendix A. CSAT3 Orientation A-4

B-1 Appendix B. Serial Communications with the CSAT3 B.1 CSAT3 RS-232 Commands The CSAT3 powers up its RS-232 drivers when it detects that the RTS

Appendix B. Serial Communications with the CSAT3 B-2 TABLE B-1. RS-232 Command Codes Command Trigger before Command Description Trigger afterComm

Appendix B. Serial Communications with the CSAT3 B-3 Nassi-Shneiderman diagrams are given in FIGURE B-1and FIGURE B-2 for collecting data using a PC

Table of Contents ii 10. Datalogger Programming using SDM ...19 10.1 CRBasic CSAT3 () Instruction...

Appendix B. Serial Communications with the CSAT3 B-4 TABLE B-2. RS-232 Output Word 0 Word 1 Word 2 Word 3 Word 4 b15 - b0 b15 - b0 b15 - b0

Appendix B. Serial Communications with the CSAT3 B-5 TABLE B-6. Converting Speed of Sound from Word 3 Conversion Output Resolution (mm s-1) (°C @

Appendix B. Serial Communications with the CSAT3 B-6 TABLE B-9. RS-232 Status, Response to the S or P Command Byte Description Value 0 Trigger S

C-1 Appendix C. CSAT3 Measurement Theory C.1 Theory of Operation C.1.1 Wind Speed Each axis of the CSAT3 pulses two ultrasonic signals in opposite

Appendix C. CSAT3 Measurement Theory C-2 blowing perpendicular to the sonic path. No additional off-line corrections are required as suggested by Li

Appendix C. CSAT3 Measurement Theory C-3 REFERENCES Kaimal, J. C. and Businger, J. A.: 1963, “A Continuous Wave Sonic Anemometer-Thermometer”, J. Ap

Appendix C. CSAT3 Measurement Theory C-4

D-1 Appendix D. SDM Communications and Long Signal Cables D.1 Brief Description of SDM Clock Rates The fastest rate that a datalogger and SDM senso

Appendix D. SDM Communications and Long Signal Cables D-2 D.2 CR3000 Example Connect all the SDM devices to the datalogger with the cable in questio

Appendix D. SDM Communications and Long Signal Cables D-3 Take the following case, a 575 foot SDM signal and power cable is used to connect a CR23X d

Table of Contents iii 4-4. CSAT3 coordinate system and original noncaptive mounting hardware (s/n 0107 to 0630)...

Appendix D. SDM Communications and Long Signal Cables D-4

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Table of Contents iv D-1. Data from Example CR3000 SDM Clock Rate Search Program... D-2 D-2. Data from Example CR23X SDM Clock Rate Search Program

1 CSAT3 Three Dimensional Sonic Anemometer 1. General The CSAT3 is an ultrasonic anemometer for measuring wind speed in three dimensions. It uses t