RXW Temperature/RH Sensor (RXW-THC-B-xxx) Manual
Deployment and Mounting
Mounting and Positioning the Mote
•
Mount the mote to a mast or pipe using cable ties or affix
the mote to a wooden post or flat surface with screws.
Insert the cable ties or screws through the holes on the
mounting tabs.
•
Consider using plastic poles such as PVC to mount the
mote as certain types of metal could decrease signal
strength.
•
Make sure the mote remains in a vertical position once it is
placed in its deployment location for optimal network
communications.
•
Make sure the mote door is closed, with both latches fully
locked to ensure a tight seal.
•
Consider using a 3/16 inch padlock to restrict access to the
mote. With the mote door closed, hook a padlock through
the eyelet on the right side of the door and lock it.
•
Make sure the mote is mounted a minimum of 1.8 m (6 ft)
from the ground to help maximize distance and signal
strength.
•
Place the mote so there is full line of sight with the next
mote. If there is an obstruction between two sensor motes
or between the sensor mote and the manager, then use a
repeater mounted on the obstruction.
•
There should not be more than five motes in any direction
at their maximum transmission range from the manager.
Data logged by a wireless sensor must travel or “hop”
across the wireless network from one mote to the next
until it ultimately reaches the manager connected to the
station. To make sure data can successfully travel across
the network, the mote should not be more than five hops
away from the manager.
•
The HOBOnet Wireless Sensor Network can support up to
50 wireless sensors or 336 data channels per one HOBO
RX station.
•
Use a #4-40 screw to attach a ground wire to the port on
the back of the mote if you are deploying the mote in a
location where lightning is a concern.
Sensor Mounting Guidelines
•
It is recommended that the probe be protected from direct
exposure to the weather. This will prolong the sensor
accuracy.
•
Refer to the station manual and Tripod Setup Guide at
www.onsetcomp.com/support/manuals for more
information regarding setting up stations.
Maintenance
The temperature/RH sensor is sensitive to dust, salts and other
airborne contamination. Periodically inspect the RH sensor. If
contamination is present on the protective cap, gently rinse it
with cool fresh water. If the sensor itself is contaminated, you
can rinse it with distilled water. Do not use hot water, organic
solvents, or detergents. Dry before use.
Periodically inspect the mote and do the following:
•
Verify the mote is free of visible damage or cracks.
•
Make sure the mote is clean. Wipe off any dust or grime
with a damp cloth.
•
Wipe off any water before opening the mote.
•
Make sure the interior seal is intact and the latches are
fully locked when the mote door is closed.
Updating Mote Firmware
If a new firmware version is available for the mote, use
HOBOlink to download the file to your computer.
1.
In HOBOlink, go to Devices, then RX Devices, and click your
station name.
2.
On the station page, click Overview and scroll down to
Device Information.
3.
Click the Wireless tab. This icon
appears next to the
mote if there is a new version of firmware available.
4.
Click the firmware
upgrade link. Click Download and
save the firmware .bin file to your computer.
5.
Connect the mote to the computer with a USB cable (open
the mote door and use the USB port to the right of the
LCD). The blue LED is illuminated while connected.
6.
The mote appears as a new storage device in the
computer’s file storage manager. Copy the downloaded
firmware file to the new storage device (the mote). The
blue LED will blink slowly while the file is copying.
7.
After the file is copied to the mote, the LED will stop
blinking and remain a steady blue. Eject the storage device
from the computer and disconnect the cable from the
mote. The firmware installation process will begin
automatically on the mote. The blue LED will blink rapidly
while the firmware is installed. Once the firmware
installation is complete, the LCD symbols return and the
mote will automatically rejoin the network.
Notes:
•
Mac® users:
A message may appear indicating the disk
has not ejected properly when disconnecting the mote
from the computer. The mote is operational and you can
ignore the message.
•
If the blue LED turns off abruptly while copying the file or
installing the firmware, a problem has occurred. Contact
Onset Technical Support for help.
Battery Information
The mote uses two 1.5 V lithium batteries (HWSB-LI). Lithium
battery life is an estimated at 1 year, but varies based on the
ambient temperature where the mote is deployed, the logging
interval, the number of tripped alarms, and other factors.
Estimates are not guaranteed due to uncertainties in initial
battery conditions and operating environment.
To install lithium batteries:
1.
Open the mote door.
2.
Remove any old batteries and install the new ones
observing polarity.
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