Campbell Scientific LWS Decagon Leaf Wetness Sensor - Manual (Page 10)

LWS-L Dielectric Leaf Wetness Sensor
8.2 CR1000 Datalogger Program
Color Description CR1000
White Excitation EX1 or VX1
Red Analog Out SE1
Bare Analog Ground
Public LWS_mV
BeginProg
Scan(60,Sec,
3, 0)
‘BRHalf(Dest,Reps,Range,SeChan,ExChan,MeasPEx,ExmV,RevEx,Settling,Integ,Mult,Offset)
BRHalf(LWS_mV, 1, mV2500, 1, VX1, 1, 2500, False, 10000, _60Hz, 2500, 0)
NextScan
EndProg
9. Maintenance
Over time, the accumulation of dust and debris will cause the dry output to
increase and 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
residue on the sensor surface. This causes the surface to lose its “sheen” over
time and a small amount of chalky residue can be rubbed off the board during
aggressive cleaning. Accelerated UV testing, equivalent to five years high UV
exposure, as well as field testing, show there is no apparent change in sensor
function as a result of the chalky residue.
Acknowledgement
Portions of this manual are copyrighted by Decagon Devices, Inc. and are used
by permission.
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