Campbell Scientific TDR Probes CS605, CS610, CS630, CS635, CS640, CS645 - Manual (Page 5)

Table of Contents
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1. Introduction.................................................................1
2. Cautionary Statements...............................................1
3. Initial Inspection .........................................................1
4. Overview......................................................................1
5. Specifications .............................................................2
5.1 Physical Description.............................................................................2
5.2 Measurement Parameters .....................................................................2
5.3 Electromagnetic Compatibility ............................................................3
6. Installation...................................................................3
7. Operation.....................................................................3
7.1 Probe Offset for Water Content Measurement.....................................3
7.1.1 Calculating Probe Offset...............................................................3
7.2 Probe Constant for Electrical Conductivity Measurement ...................4
7.2.1 Electrical Conductivity Error from Attenuation............................4
7.3 Water Content Measurement Error from Cable ...................................4
7.4 Water Content Measurement Error from Soil Electrical
Conductivity .....................................................................................5
8. References ..................................................................7
Appendices
A. Discussion of TDR Probe Offset and a Simple
Laboratory Method for Calculation..................... A-1
A.1 Discussion of Probe Offset.............................................................. A-1
A.2 The Compounding Effect of Signal Attenuation in Connecting
Cables .......................................................................................... A-2
A.3 Method for Calculating Probe Offset Using Information from the
Terminal Mode of PC-TDR......................................................... A-3
A.3.1 Procedure for Calculating Probe Offset ................................... A-3
A.3.2 An Example Using CS605 ....................................................... A-4
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