Decagon Devices Dielectric Leaf Wetness Sensor Manuale del proprietario/operatore - Pagina 10
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3.4
Extending the Sensor Leads
Extension cables for the LWS are available from Decagon in 10 and
50 foot (3 and 15 meter) lengths. The leads can be extended up to
250 feet without signal attenuation.
When using these extension cables in an unprotected environment,
the junctions between cables must be waterproofed. This can be ef-
fectively accomplished by connecting the junction, applying silicone
sealant to the junction, and shrinking appropriately sized heat-shrink
tubing over the still wet silicone sealant.
3.5
UV Protection
The LWS leaf wetness sensor is designed to withstand typical out-
door radiation and precipitation loads for greater than two years. If
you are using the LWS in areas with non-typical (unusually high) ra-
diation loads, we recommend additional applications of McNett UV
Tech (available from http://www.mcnett.com) be reapplied every 45
days. McNett is the only tested and approved UV blocking system
for Decagon's Leaf Wetness Sensor.
To apply McNett UV Tech:
1. Wipe sensor clean.
2. Spray sensor surface with McNett UV Tech.
3. Rub with soft cloth until dry.
Figure 3: Sensor wiring diagram
3 COLLECTING DATA
7