Campbell Scientific Sentek TriSCAN® Manual v 1.2a - Manual (Page 4)

TriSCAN Manual Version 1.2a
Copyright © 1991 – 2004 Sentek Pty Ltd All rights reserved
Table of Contents
Disclaimer .................................................................................................................3
Table of Contents......................................................................................................4
List of Figures............................................................................................................i
List of Tables.............................................................................................................ii
Introduction .............................................................................................................. 1
TriSCAN: Sentek’s Fertilizer/Salinity and Soil Water Monitoring System..................................................1
Important Definitions and Terms....................................................................................................................1
Salinity – the problem ........................................................................................................................................2
Where does the salt come from?......................................................................................................................3
Global impacts of salinization...........................................................................................................................3
Why measure salinity and soil water content?.................................................................................................3
Fertilizer management .......................................................................................................................................4
What is TriSCAN? ....................................................................................................5
TriSCAN Features ..............................................................................................................................................5
TriSCAN Applications.......................................................................................................................................6
Benefits of TriSCAN Applications...................................................................................................................6
How does the TriSCAN sensor work? ....................................................................7
Sensor output and measurement units.............................................................................................................7
Measurement Range and Soil Suitability..........................................................................................................7
Resolution and Accuracy ...................................................................................................................................7
Temperature Effects ..........................................................................................................................................8
Getting TriSCAN ready for logging ........................................................................9
Probe Assembly and Sensor Addressing .........................................................................................................9
Probe Configuration and Normalization.......................................................................................................12
Site Selection ........................................................................................................... 18
What is site selection? ......................................................................................................................................18
Relationship between macro and micro zones in the field..........................................................................18
Important factors for macro site selection ....................................................................................................19
A general view of macro scale zone selection ...............................................................................................23
Micro scale zone selection...............................................................................................................................25
Micro zone selection guidelines ......................................................................................................................25
Access Tube and Probe Installation......................................................................28
Standard TriSCAN Access Tube Installation Method.................................................................................28
EasyAG TriSCAN Installation .......................................................................................................................31
Benchmarking Soil Salinity – TriSCAN Calibration............................................33
Sampling Method .............................................................................................................................................33
Laboratory Methods.........................................................................................................................................35
Adjusting the Salinity scale from Volumetric Ion Content (VIC) units to EC or EC
e
units...................36
Salinity and Soil Water Data Interpretation ..........................................................37
Example 1 .........................................................................................................................................................37
Example 2 .........................................................................................................................................................39
Example 3 .........................................................................................................................................................40