Campbell LWS-L Instruction Manual Download Page 2

Warranty and Assistance 

The

 

LWS-L DIELECTRIC LEAF WETNESS SENSOR 

is warranted by 

CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and 
workmanship under normal use and service for twelve (12) months from date 
of shipment unless specified otherwise.  Batteries have no warranty.  
CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to 
repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective 
products.  The customer shall assume all costs of removing, reinstalling, and 
shipping defective products to CAMPBELL SCIENTIFIC, INC.  CAMPBELL 
SCIENTIFIC, INC. will return such products by surface carrier prepaid.  This 
warranty shall not apply to any CAMPBELL SCIENTIFIC, INC. products 
which have been subjected to modification, misuse, neglect, accidents of 
nature, or shipping damage.  This warranty is in lieu of all other warranties, 
expressed or implied, including warranties of merchantability or fitness for a 
particular purpose.  CAMPBELL SCIENTIFIC, INC. is not liable for special, 
indirect, incidental, or consequential damages. 

Products may not be returned without prior authorization.  The following 
contact information is for US and International customers residing in countries 
served by Campbell Scientific, Inc. directly.  Affiliate companies handle 
repairs for customers within their territories.  Please visit 
www.campbellsci.com to determine which Campbell Scientific company 
serves your country.  To obtain a Returned Materials Authorization (RMA), 
contact CAMPBELL SCIENTIFIC, INC., phone (435) 753-2342.  After an 
applications engineer determines the nature of the problem, an RMA number 
will be issued.  Please write this number clearly on the outside of the shipping 
container.  CAMPBELL SCIENTIFIC's shipping address is: 

 

 

CAMPBELL SCIENTIFIC, INC. 

 RMA#_____ 
 

815 West 1800 North 

 

Logan, Utah 84321-1784 

 

CAMPBELL SCIENTIFIC, INC. does not accept collect calls. 

 

 

 

Summary of Contents for LWS-L

Page 1: ...LWS L Dielectric Leaf Wetness Sensor Revision 3 09 C o p y r i g h t 2 0 0 8 2 0 0 9 C a m p b e l l S c i e n t i f i c I n c...

Page 2: ...all other warranties expressed or implied including warranties of merchantability or fitness for a particular purpose CAMPBELL SCIENTIFIC INC is not liable for special indirect incidental or consequen...

Page 3: ...escription 1 2 Specifications 1 3 Installation 2 4 Wiring 3 5 Measurement 3 6 Interpreting Data 3 7 Operational Principles 4 7 1 Measurement 4 7 2 Leaf Mimicry 5 8 Example Programs 5 8 1 CR10X Datalog...

Page 4: ...This is a blank page...

Page 5: ...ace wetness by measuring the dielectric constant of the sensor s upper surface The sensor is able to detect the presence of miniscule amounts of water or ice Individual sensor calibration is not norma...

Page 6: ...Leaf Wetness Sensor 3 Installation The LWS L is designed to be mounted on a small diameter rod Deployment in a plant canopy or on a weather station mast is typical Two holes in the sensor body are av...

Page 7: ...of the excitation voltage The LWS L is intended only for applications wherein the datalogger provides short excitation leaving the probe quiescent most of the time Continuous excitation may cause the...

Page 8: ...nts Collect data frequently enough to capture changes in surface wetness A sample frequency of 15 minutes or less is usually necessary to accurately capture leaf wetness duration NOTE 7 Operational Pr...

Page 9: ...surface coating of the LWS L absorbs well in the near infra red region but the white color reflects most of the visible radiation Spectroradiometer measurements indicate that the overall radiation bal...

Page 10: ...d changing the Boolean threshold Clean the sensing surface with a moist cloth periodically or when elevated dry output is detected LWS L sensors exposed to high levels of UV radiation develop a chalky...

Page 11: ......

Page 12: ...a Corp CSC 11564 149th Street NW Edmonton Alberta T5M 1W7 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Centro Caribe S A CSCC 300 N Cementerio Edificio Breller Santo Doming...

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