Campbell Scientific 237-L Leaf Wetness Sensor - Manual (Page 3)

237 Table of Contents
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1. Introduction..................................................................1
1.1 Specifications............................................................................................1
2. Wiring............................................................................1
3. Programming ...............................................................2
3.1 Measurement of Vs / Vx...........................................................................2
3.2 Calculating Sensor Resistance ..................................................................2
3.3 Interpreting Resistance Values .................................................................3
3.4 Calculating Wet Time Fraction.................................................................3
4. Programming Examples..............................................4
4.1 CR1000 Program Example .......................................................................4
4.2 CR200(X) Programming ..........................................................................4
4.3 CR10(X) Programming Example .............................................................5
5. Plant Pathology Application .......................................6
5.1 Sensor Preparation....................................................................................6
5.2 Plant Pathology Application Programming ..............................................7
5.3 Sensor Deployment...................................................................................7
5.4 Calibration ................................................................................................7
6. References ...................................................................8
Figures
1. 237 Sensor Schematic.................................................................................1
2. Mounting the 237 Sensor............................................................................7
Tables
1. Connections to Campbell Scientific Dataloggers .......................................1
2. Measurement Instructions, Parameters, Results .........................................2
3. 237 Resistance Interpretations....................................................................3
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