Campbell LWS, Instruction Manual

Page 1: ...INSTRUCTION MANUAL LWS Dielectric Leaf Wetness Sensor Revision 2 15 C o p y r i g h t 2 0 0 8 2 0 1 5 C a m p b e l l S c i e n t i f i c I n c...

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Page 3: ...ucts to CSI CSI will return such Products by surface carrier prepaid within the continental United States of America To all other locations CSI will return such Products best way CIP port of entry per...

Page 4: ...g container Campbell Scientific s shipping address is CAMPBELL SCIENTIFIC INC RMA _____ 815 West 1800 North Logan Utah 84321 1784 For all returns the customer must fill out a Statement of Product Clea...

Page 5: ...ore beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit...

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Page 7: ...5 2 Leaf Mimicry 4 6 Specifications 5 7 Installation 6 7 1 Field Installation 6 7 2 Wiring 7 7 3 Programming 7 7 3 1 Voltage Measurement 7 7 3 2 Interpreting Data 8 8 Maintenance 9 9 Acknowledgement...

Page 8: ...Table of Contents Tables B 1 CR1000 Example Wiring B 1 B 2 CR6 Example Wiring B 2 ii...

Page 9: ...RSTAND the Precautions section at the front of this manual Care should be taken when opening the shipping package to not damage or cut the cable jacket If damage to the cable is suspected consult with...

Page 10: ...ort Cut to program the LWS 1 Install Short Cut by clicking on the install file icon Get the install file from either www campbellsci com the ResourceDVD or find it in installations of LoggerNet PC200W...

Page 11: ...ilable Sensors and Devices list select the Sensors Miscellaneous Sensors folder Select LWS Dielectric Leaf Wetness Sensor Click to move the selection to the Selected device window Enter the Dry thresh...

Page 12: ...ogger as shown in the wiring diagram in step 6 check the output of the sensor in the datalogger support software data display to make sure it is making reasonable measurements 5 Overview 5 1 Measureme...

Page 13: ...a healthy leaf During normal use prolonged exposure to sunlight can cause some yellowing of the coating which does not affect the probe s function The surface coating is hydrophobic similar to a leaf...

Page 14: ...tion 4 Quickstart p 2 for a Short Cut tutorial 7 1 Field Installation The LWS is designed to be mounted on a small diameter rod Deployment in a plant canopy or on a weather station mast is typical Two...

Page 15: ...nd edited in CRBasic Editor A Short Cut tutorial is available in Section 4 Quickstart p 2 If you wish to import Short Cut code into CRBasic Editor to create or add to a customized program follow the p...

Page 16: ...y 475 mV when frosted and 475 mV when wet Therefore a Boolean wetness threshold of 500 mV should serve well for interpreting these data FIGURE 7 3 Typical LWS response Duration of leaf wetness can be...

Page 17: ...cipitation loads for greater than two years If you are using the LWS in areas with non typical unusually high radiation loads we recommend additional applications of McNett UVTech available from www m...

Page 18: ...LWS Dielectric Leaf Wetness Sensor 10...

Page 19: ...and exit Short Cut Make note of the file name used when saving the Short Cut program 2 Open CRBasic Editor 3 Click File Open Assuming the default paths were used when Short Cut was installed navigate...

Page 20: ...Appendix A Importing Short Cut Code Into a Program Editor mark begins each line This character instructs the datalogger compiler to ignore the line when compiling the datalogger code A 2...

Page 21: ...nits LWMWet Minutes Define Data Tables DataTable Table1 True 1 DataInterval 0 60 Min 10 Sample 1 BattV FP2 Sample 1 PTemp_C FP2 Sample 1 LWmV FP2 Totalize 1 LWMDry FP2 False Totalize 1 LWMCon FP2 Fals...

Page 22: ...The wiring for the example is shown in TABLE B 2 TABLE B 2 CR6 Example Wiring Color Function CR6 White Excitation U1 Red Analog Out U2 Bare Analog Ground CR6 Series Declare Variables and Units Public...

Page 23: ...surement PTemp_C PanelTemp PTemp_C 60 LWS Dielectric Leaf Wetness Sensor measurement LWmV BrHalf LWmV 1 mV5000 U2 U1 1 2500 False 10000 60 2500 0 Determine Minutes Dry LWMDry Minutes Wet or Contaminat...

Page 24: ...Appendix B Example Programs B 4...

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Page 26: ...m br Campbell Scientific Canada Corp CSC 14532 131 Avenue NW Edmonton AB T5L 4X4 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Centro Caribe S A CSCC 300 N Cementerio Edific...