Campbell CSAT3B, Instruction Manual, Page: 8 / 88

Table of Contents
7.3 Mounting ........................................................................................... 25
7.4 Leveling ............................................................................................. 27
7.5 Additional Fast-response Sensors...................................................... 28
7.5.1 Fine-Wire Thermocouple ........................................................... 28
7.5.2 Other Gas Analyzers .................................................................. 30
7.6 Wiring ............................................................................................... 30
7.7 Communications ................................................................................ 31
7.7.1 SDM Communications ............................................................... 32
7.7.2 CPI Communications ................................................................. 36
7.7.3 RS-485 Communications ........................................................... 40
7.7.4 USB ............................................................................................ 42
8. Operation ................................................................... 43
8.1 Theory of Operation .......................................................................... 43
8.1.1 Algorithm Version 5 .................................................................. 44
8.1.2 Effects of Crosswind on the Speed of Sound ............................. 44
8.2 Operating Modes ............................................................................... 45
8.2.1 Measurement Trigger ................................................................. 46
8.2.2 Data Filter .................................................................................. 46
8.2.3 Data Output ................................................................................ 47
8.2.4 Operating Mode Recommendations ........................................... 50
8.3 Synchronization with other sensors ................................................... 50
8.4 Datalogger Programming using SDM or CPI .................................... 51
8.4.1 CRBasic Instructions .................................................................. 52
8.4.1.1 CSAT3B() ........................................................................ 52
8.4.1.2 CSAT3BMonitor()........................................................... 52
8.4.2 Diagnostic Word ........................................................................ 53
8.4.3 SDMTrigger() ............................................................................ 54
9. Maintenance and Troubleshooting .......................... 55
9.1 General Maintenance ......................................................................... 55
9.2 Sonic Wicks ...................................................................................... 55
9.3 Desiccant ........................................................................................... 56
9.4 Calibration ......................................................................................... 57
9.4.1 Test for Wind Offset .................................................................. 58
9.5 Troubleshooting ................................................................................ 60
9.5.1 Sending an OS to the CSAT3B .................................................. 60
9.6 Returning the CSAT3B ..................................................................... 61
10. Reference and Attributions ...................................... 61
10.1 References ......................................................................................... 61
Appendices
A. CSAT3B Orientation ................................................ A-1
A.1 Determining True North and Sensor Orientation ............................ A-1
A.2 Online Magnetic Declination Calculator ......................................... A-3
B. CSAT3B Measurement Theory ............................... B-1
B.1 Theory of Operation ........................................................................ B-1
B.1.1 Wind Speed .............................................................................. B-1
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