Campbell CS650, User Manual

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8.3.5 Temperature Dependence and Correction ................................... 22
8.3.5.1 Accurate Soil Temperature Measurement ........................ 23
8.4 Water Content Reflectometer User-Calibration ................................. 23
8.4.1 Need for Soil Specific Calibration Equation ............................... 23
8.4.2 User-Derived Calibration Equation ............................................ 23
8.4.3 Collecting Laboratory Data for Calibration ................................ 24
8.4.4 Collecting Field Data for Calibration.......................................... 26
8.4.5 Calculations ................................................................................ 27
9. Maintenance and Troubleshooting ......................... 29
10. References ............................................................... 30
Appendices
A. Importing Short Cut Code into a Program
Editor .................................................................... A-1
B. Example Programs ................................................ B-1
B.1 CR1000 Programs ............................................................................ B-1
B.1.1 CR1000 with One CS650 Probe ............................................... B-1
B.1.2 CR1000 with Two CS650 Probes on Same Control Port ......... B-1
B.1.3 CR1000 with 12 CS650 Probes on Multiplexer ........................ B-2
B.2 CR200X with Three CS650 Probes ................................................. B-3
C. Discussion of Soil Water Content ......................... C-1
D. SDI-12 Sensor Support .......................................... D-1
D.1 SDI-12 Command Basics ................................................................. D-1
D.2 Changing the SDI-12 Address Using Terminal Emulator and a
Datalogger .................................................................................... D-3
D.2.1 SDI-12 Transparent Mode ........................................................ D-3
D.2.2 CR200(X) Series Datalogger Example ..................................... D-4
D.2.3 CR1000 Datalogger Example ................................................... D-5
Figures
5-1. CS650 Water Content Reflectometer ................................................... 5
6-1. CS650 and CS655 average current drain ............................................. 8
7-1. CS650G Insertion Guide Tool ........................................................... 10
8-1. A200 Sensor-to-PC Interface ............................................................. 12
D-1. SDI-12 transparent mode on CR200(X)-series datalogger using
control port C1/SDI12 and changing SDI-12 address from 0
to 1 ................................................................................................ D-4
D-2. SDI-12 transparent mode on CR1000 datalogger using control
port 1 and changing SD1-12 address from 3 to 1 ......................... D-5