Product User Guide | 2
LF101A
PRODUCT USER GUIDE
Product Notes
The LF101A is a complete data logging system that
accurately measures and records leaf wetness. Not only
does it record the presence of water but also logs the
amount of water on the sensor. The sensor responds to
environments the same way a real leaf does and can also
detect when ice is present. This low cost system comes
complete with a data logger, weatherproof enclosure and
leaf wetness sensor.
Installation Guide
Installing the Interface Cable
IFC200
—
Insert the device into a USB port. The drivers will
install automatically.
Installing the Software
The Software can be downloaded from the MadgeTech
website at
. Follow the instructions
provided in the Installation Wizard.
Wiring the Data Logger
The LF101A sensor has a three wire output:
• The white wire should attach to the Exc. Out.
• The red wire should attach to the In (+).
• The unsheathed wire should attach to the ground with a
jumper from ground to In (-).
The diagram below outlines the wiring connections.
Installing the Sensor*
The LF101A is designed
to be deployed either in
the canopy or on weather
station masts. There are two
holes in the non-sensing
portion of the sensor body
for mounting. The holes can
be used with either zip ties
or with 4-40 bolts.
Extending the Sensor Leads*
Extension cables for the LF101A are available 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 water-proofed. This can be effectively
accomplished by connecting the junction, applying
silicone sealant to the junction, and shrinking
appropriately sized heat-shrink tubing over the still-
wet silicone sealant.
*Dielectric Leaf Wetness Sensor Operator’s Manual; Version 3; 2007-2010
Decagon Devices, Inc
