Campbell Scientific CSAT3 3-D Sonic Anemometer - Manual (Page 8)

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 ............................................. 28
11. Maintenance .............................................................. 37
11.1 Wicks................................................................................................. 38
11.2 Calibration ......................................................................................... 39
11.2.1 Cold Shifted Calibration ............................................................ 39
11.2.2 Test for Wind Offset .................................................................. 40
12. Select Backdoor Commands ................................... 42
Appendices
A.
CSAT3 Orientation .................................................. A-1
A.1 Determining True North and Sensor Orientation ............................ A-1
A.2 Online Magnetic Declination Calculator ......................................... A-3
B. Serial Communications with the CSAT3 ............... B-1
B.1 CSAT3 RS-232 Commands ............................................................ B-1
B.2 CSAT3 Binary Data Output Format ................................................ B-3
B.3 Words 0 through 3 ........................................................................... B-4
B.4 Word 4 ............................................................................................. B-5
B.5 CSAT3 RS-232 Status Format ........................................................ B-5
C. CSAT3 Measurement Theory ................................. C-1
C.1 Theory of Operation ........................................................................ C-1
C.1.1 Wind Speed .............................................................................. C-1
C.1.2 Temperature ............................................................................. C-1
D. SDM Communications and Long Signal Cables .. D-1
D.1 Brief Description of SDM Clock Rates ........................................... D-1
D.2 CR3000 Example ............................................................................ D-2
D.3 CR23X Example ............................................................................. D-2
Figures
4-1. CSAT3 coordinate system and current captive mounting hardware
(s/n 0631 to current) ......................................................................... 6
4-2. CSAT3 coordinate system and captive mounting hardware (s/n
0631 to current) ................................................................................ 7
4-3. CSAT3 coordinate system, captive mounting hardware, and cup
washer (s/n 0107 to 0630) ................................................................ 7
4-4. CSAT3 coordinate system and original noncaptive mounting
hardware (s/n 0107 to 0630) ............................................................ 8
8-1. Typical average CSAT3 current drain at +12 VDC .......................... 17
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