Onset RXW-WCF-900 Operating Manual

HOBO® RX Wireless Sensor Network

W

O

RXW Davis® Wind Speed and Direction Sensor (RXW-WCF-xxx) Manual

This sensor measures wind speed and direction and is designed to work with the HOBOnet
Wireless Sensor Network in which data is transmitted wirelessly from the sensor mote across
the network to the RX3000 station and then uploaded to HOBOlink® web-based software. With
HOBOlink, you can monitor sensor readings, view graphs, set up alarms, download data, and
more.

Specifications

Sensor Wind Speed/Gust Wind Direction

Measurement Range 0 to 76 m/sec (0 to 170 mph) 0 to 355 degrees

RXW Davis Wind Speed &
Direction Sensor

Models:

• RXW-WCF-900 (US)

• RXW-WCF-868 (Europe)

• RXW-WCF-922

(Australia/NZ)

Included Items:

• Cable ties

• Screws

Required Items:

• Weather-resistant cable
ties or cable clips

• Electrical tape

• Handheld compass, local

area map, or handheld GPS

If mounting on tripod or mast:

• Adjustable wrench

If mounting on wooden surface:

• Drill with 5 mm (3/16 inch)
drill bit

Accessories:

• Grounding kit (M-GKA)

Accuracy ±1.1 m/sec (±2 mph) or ±5% of

Resolution 0.5 m/sec (1.1 mph) 1.4 degrees (0 to 355 degrees)

Starting Threshold ≤1 m/sec (2.2 mph) 1 m/sec (2.2 mph)

Turning Radius 108 mm (4.25 in.) Approximately 135 mm (5.25 in.)

Measurement Definition Cup revolutions are accumulated

ireless Mote

perating Temperature

Range

Radio Power 12.6 mW (+11 dBm) non-adjustable

Transmission Range Reliable connection to 457.2 m (1,500 ft) line of sight at 1.8 m (6 ft) high

Wireless Data Standard IEEE 802.15.4

Radio Operating
Frequencies

Modulation Employed OQPSK (Offset Quadrature Phase Shift Keying)

Data Rate Up to 250 kbps, non-adjustable

Duty Cycle <1%

Maximum Number of
Motes

Battery Type/
Power Source

Battery Life With NiMH batteries: Typical 3–5 years when operated in the

Memory 16 MB

Dimensions Sensor: 470 x 191 x 121 mm (18.5 x 7.5 x 4.75 in.)

Weight Sensor and cable: 1.332 kg (2 lb, 15 oz)

Materials Sensor: Polycarbonate wind cups, sealed stainless steel bearing, UV-

reading, whichever is greater

every three seconds for the
duration of the logging interval
(see Measurement Operation)

Wind speed: Average speed for
the entire logging interval

Gust speed: The highest three­second wind recorded during the
logging interval

-25° to 60°C (-13° to 140°F) with rechargeable batteries

-40 to 70°C (-40 to 158°F) with lithium batteries

Reliable connection to 609.6 m (2,000 ft) line of sight at 3 m (10 ft) high

RXW-WCF-900: 904–924 MHz
RXW-WCF-868: 866.5 MHz
RXW-WCF-922: 916–924 MHz

50 motes per one RX Wireless Sensor Network

Two AA 1.2V rechargeable NiMH batteries, powered by built-in solar
panel or two AA 1.5 V lithium batteries for operating conditions of -40 to
70°C (-40 to 158°F)

temperature range -20° to 40°C (-4°F to 104°F) and positioned toward the
sun (see Deployment and Mounting), operation outside this range will
reduce the battery service life

With lithium batteries: 1 year, typical use

Cable length: 3 m (9.8 ft)
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)

Mote: 223 g (7.87 oz)

resistant ABS wind vane and black-anodized aluminum anemometer arm
Mote: PCPBT, silicone rubber seal

±7 degrees

Unit vector averaging used; vector
components for each wind
measurement are calculated
every three seconds for duration
of logging interval (see
Measurement Operation)

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RXW Davis Wind Speed and Direction Sensor (RXW-WCF-xxx) Manual

C

Specifications (continued)

Environmental Rating Sensor: Weatherproof

ompliance Marks RXW-WCF-900: See last page

Mote Components and Operation

Mounting
Tab

Solar Panel

Sensor Cable

Sensor Mote Closed, Front Sensor Mote Closed, Back

Solar Panel Cable

Latch

Eyelet

Ground Wire
Port

LEDs

Antenna

LCD Screen

Mote: IP67, NEMA 6

RXW-WCF-868: The CE Marking identifies this product as
complying with all relevant directives in the European Union
(EU).

RXW-WCF-922: See last page

blinking quickly while the mote searches for a network and
then slowly as the mote registers with the network. Once the
network registration process is complete, the blue LED blinks at
4 seconds to indicate normal operation. If the mote is not
currently part of a network, the blue LED will be off. If the blue
LED is on and not blinking, there is a problem with the mote.
Contact Onset Technical Support.

Battery Holder: The location where the batteries are installed
as shown (see Battery Information).

USB Port: Use this port to connect to the mote to a computer
via USB cable if you need to update the firmware (see Updating

Mote Firmware).

Button: Push this button for 1 second to illuminate the LCD or 3

seconds for the mote to search for an RX Wireless Sensor
Network to join (see Adding the Mote to the RX Wireless Sensor
Network).

LCD Screen: The mote is equipped with an LCD screen that
displays details about the current status. This example shows all
symbols illuminated on the LCD screen followed by definitions
of each symbol in the table.

Button

USB Port

Battery Holder

Sensor Mote Opened

Mounting Tab: Use the tabs at the top and bottom of the mote

to mount it (see Deploying and Mounting).

Solar Panel: Position the solar panel towards the sun to charge
the mote batteries (see Deploying and Mounting).

Sensor Cable: This is the cable that connects the mote to the
sensor.

Eyelet: Use this eyelet to attach a 3/16 inch padlock to the
mote for security.

Latch: Use the two latches to open and close the mote door.

Ground Wire Port: Use this port to connect a ground wire (see

Deploying and Mounting).

Antenna: This is the built-in antenna for the radio
communications across the RX Wireless Sensor Network.

Solar Panel Cable: This cable connects the built-in solar panel
to the mote circuitry.

LEDs: There are two LEDs to the left of the LCD screen. The
green LED blinks during the process of joining a network,

LCD Symbol Description

The battery indicator shows the approximate battery
charge remaining.

This is a signal strength indicator. The more bars, the
stronger the signal between motes. If there is no x
icon next to the signal strength indicator, then the
mote is part of an RX Wireless Sensor Network.

An empty signal strength icon plus the x icon
indicates that the mote is not currently part of a
network. See Adding the Mote to the RX Wireless
Sensor Network for details on how to add a mote to
the network.

When the mote is in the process of joining a
network, the signal strength icon will blink and then
the bars in the icon will cycle from left to right. The x
icon will blink during the last step in the network
registration process (see Adding the Mote to the RX
Wireless Sensor Network for details).

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RXW Davis Wind Speed and Direction Sensor (RXW-WCF-xxx) Manual

Sensor Components

The sensor includes the components shown below.

The sensor also includes a hardware kit with the items most
commonly needed for installation as shown below. The items
you use from the kit depend on where you install the sensor.
You may need to adapt or purchase additional hardware to fit
your individual requirements.

HOBO RXW Manager is installed in the left slot (module 1)
or twice if it is installed on the right slot (module 2).

Press this button to view the module
where the RXW Manager is installed

3. Press the Search button (the magnifying glass). The
magnifying glass icon will blink while the RX3000 is in search
mode.

Press this button so the station is ready
to have motes join the network

4. Open the mote door and install the batteries if you have not
already done so.

5. Press the button on the mote for 3 seconds. The signal
strength icon will flash and then cycle.

Adding the Mote to the RX Wireless Sensor
Network

The mote must join an RX Wireless Sensor Network before it
can begin measuring wind speed and direction and transmitting
data. This requires accessing the RX3000 station and the mote
at the same time so it is recommended that you complete
these steps before deploying the mote.

Important: If you have not configured the RX3000 station with
the RXW Manager, follow the instructions in the RX3000 Quick
Start before continuing.

To add a mote to the RX Wireless Sensor Network:

1. If the LCD is blank on the RX3000 station, press any button
to wake it up.

2. Press the Select button once (which shows the number of
smart sensors installed) and then press it again once if the

Press this button for 3
seconds for the mote to
join the network

6. Watch the LCD on the mote.

a.

This signal strength icon
blinks while searching for
a network.

c.

This network connection
“x” icon blinks while the
mote completes the
registration process,
which may take up to
five minutes.

b.

Once a network is found,
the icon will stop flashing
and the bars will cycle from
left to right.

d.

Once the mote has finished joining
the network, the “x” icon is
removed and the channel count on
the station LCD increases by three
(two for wind speed/direction and
one for the mote battery).

This process may take up to five minutes. The green LED
blinks quickly while the mote searches for a network to join

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RXW Davis Wind Speed and Direction Sensor (RXW-WCF-xxx) Manual

and then blinks slowly while it completes the network
registration. Once the mote has finished joining the
network, the green LED turns off and the blue LED then
blinks indefinitely while the mote is part of the network.

Note: If the mote cannot find the network or has trouble
remaining connected during this process, make sure the
mote is in a vertical, upright position and within range of
the station.

7. Press the Search button (the magnifying glass) on the
RX3000 station to stop searching for motes.

Press this button again to
stop searching for motes

If you added more than one more mote to the network, then
the total channel count on the RX3000 station LCD for the RXW
Manager module will represent all measurement channels plus
a battery channel for each mote in the RX Wireless Sensor
Network.

Sensor measurements will be recorded at the logging interval
specified in HOBOlink, transmitted to the RX3000 station, and
uploaded to HOBOlink at the next connection interval
(readout). Use HOBOlink to monitor mote status and health. If a
mote is temporarily offline, any logged data is saved until it is
back online. In addition, if a mote is offline for 30 minutes, the
RX3000 station will automatically connect to HOBOlink and
report the mote as missing. Once the mote is back online, any
logged data will be uploaded the next time the RX3000 station
connects to HOBOlink.

See the HOBOlink Help for details on how to change the logging
and connection intervals, view data, check mote status, add the
mote to a map, and more.

3. Use the Allen wrench provided to tighten the set screw on
the side of the wind cups. The wind cups should drop
slightly when you let go.

4. Ensure the set screw is screwed in fully and very tight.
Failure to do so will cause the anemometer to function
improperly.

5. Spin the wind cups; they should spin freely. If they do not
spin freely, take them off and repeat these steps

Attaching the Anemometer Arm to the Base

1. Insert the anemometer arm into the base, sliding the cable
through the notch in the base as shown below. Be sure to
line up the small hole in the arm with the holes in the base.

Assembling the Sensor

Attaching the Wind Vane

The wind direction has been calibrated in the factory so that
the wind direction will be correct when the arm is installed
pointing north and the vane is installed correctly.

1. Slide the wind vane onto the wind vane shaft. The shaft’s
cross-section is D-shaped to ensure that the anemometer is
installed correctly.

2. Tighten the set screw in the wind vane with the Allen wrench.

Attaching the Wind Cups

1. Push the wind cups onto the anemometer’s stainless steel
wind cup shaft.

2. Slide the wind cups up the shaft as far as possible.

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2. Insert the machine screw through the holes in the base and
arm.

3. Slide the tooth-lock washer and hex nut onto the machine
screw. Tighten the hex nut while holding the screw with a
Phillips head screwdriver to prevent it from turning.

4. Press the sensor cable firmly and completely into the zig-
zagging channel in the base, starting from the arm and
progressing downward to the bottom of the base.

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.

RXW Davis Wind Speed and Direction Sensor (RXW-WCF-xxx) Manual

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 watertight 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.

• Position the mote towards the sun, making sure the solar
panel is oriented so that it receives optimal sunlight
throughout each season. I It may be necessary to
periodically adjust the mote position as the path of the
sunlight changes throughout the year or if tree and leaf
growth alters the amount of sunlight reaching the solar
panel.

• Make sure the mote is mounted a minimum of 1.8 m (6 ft)
from the ground or vegetation 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 RXW
Manager, then use an RXW Repeater (RXW-RPTR-xxx). For
example, if there is a hill between the sensor mote and
the RXW Manager, place a repeater at the top of the hill
between the sensor mote and the RXW Manager.

• There should not be more than five motes in any direction
at their maximum transmission range from the RXW
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 RXW Manager at the
RX3000 station. To make sure the data can successfully
travel across the network, the mote should not be more
than five hops away from the manager.

• The RX Wireless Sensor Network can support a maximum
of 50 motes.

• 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.

mast, or a metal pipe. You may mount the sensor on a
wooden post if it has a side facing due north for mounting.

• The tripod or mounting mast must be properly grounded.
For field installations, you can use Onset’s Grounding Kit
(M-GKA).

• If you live in an area subject to frequent thunderstorms,
installing a lightning rod nearby can reduce the risk of
damage.

• Be sure to secure the sensor cable with cable ties to
protect it from damage.

• Secure the mast the wind sensor is mounted on so that it
does not vibrate. If you are using Onset masts or tripods,
secure them with guy wires.

• The sensor can be damaged with improper handling. Store
the sensor in its shipping box until you are ready to install it.

• To minimize measurement errors due to ambient RF, use
the shortest possible probe cable length and keep the
probe cable as far as possible from other cables carrying
high frequency or high current signals.

Sensor Mounting on a Mast

Follow these instructions for mounting the sensor on a tripod
or mast. The U-bolts included can be used for mounting the
sensor on a mast or tripod with an outside diameter ranging
from 32–44 mm (1.25–1.75 inches). Larger U-bolts (not
supplied) can be used to mount on a mast or tripod with a
maximum outside diameter of 64 mm (2.5 inches). To mount
the sensor on a mast or tripod smaller than 32 mm (1.25
inches), use a U-Bolt that fits the anemometer base openings,
but has a shorter threaded section.

1. Place the U-bolt around the pole so that its two ends
extend through the holes in the mounting base. Loosely
secure with the flat washers, lock washers, and hex nuts.

Sensor Mounting Guidelines

Use the following guidelines to determine the best location for
installing the sensor.

• To ensure correct orientation of the wind vane, the sensor
must be mounted so that the anemometer arm points
north. See North Alignment for steps on finding true north.

• For the most accurate readings, the sensor should be
mounted 2 m (7 ft) or more above the ground and
consistent with meteorological standards for the
application. The sensor should be mounted at least 2.1 m
(7 ft) above the roof line if mounted on a roof and
mounted at a distance of at least five times the height of
the nearest tree, building, or other obstruction. You may
do this by mounting the sensor on an Onset tripod or

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2. Raise the anemometer to the desired height on the pole
and swivel it so the anemometer arm is pointing north.

3. Using an adjustable wrench or 7/16 inch wrench, tighten
the hex nuts until the anemometer is firmly fastened on the
pole.

RXW Davis Wind Speed and Direction Sensor (RXW-WCF-xxx) Manual

Sensor Mounting on a Wooden Post or Surface

Follow these instructions for mounting the sensor on a wooden
post or surface. The sensor must be mounted on the side that is
facing due north (the mounting arm must point north for
proper wind direction measurements).

1. Hold the anemometer base against the wood surface and
use a pencil to mark the location of the two holes on the
base.

2. Use a drill with a 5 mm (3/16 inch) drill bit to make pilot
holes in these locations.

3. Drive the 3-inch lag screws through the holes in the
anemometer base and into the wood.

Securing the Sensor Cables

To prevent fraying or cutting the anemometer cables where it is
exposed to weather, secure it so it does not whip about in the
wind. Use cable clips or weather resistant cable ties to secure
the cable. Place clips or cable ties approximately every 1 to 1.6
m (3 to 5 ft). Do not use metal staples to secure cables as they
can cut the cables.

Measurement Operation

Wind speed measurements are averaged automatically every 3
seconds within each logging interval. Wind speed is reported as
the average speed for the entire logging interval. For example,
if the logging interval is set to 1 minute, then 20 measurements
(1 measurement every 3 seconds for 60 seconds) are averaged
together and the result is logged each minute. The gust speed is
the highest 3-second wind recorded during the logging interval.

Unit vector averaging is used to determine wind direction
because traditional averaging would produce inaccurate
results. For example, three measurements of 350, 11, and 12
degrees—which are all winds from the north—averaged
together would result in 126 degrees, which incorrectly
indicates a southeasterly wind. Instead, the vector components
(North/South and East/West) for each wind measurement are
calculated every three seconds for the duration of the logging
interval. At the conclusion of the logging interval, the
North/South and East/West components are averaged and
then re-combined to calculate the average wind direction for
the logging interval.

North Alignment

The sensor must be oriented to true north to obtain meaningful
data. There are two methods to align the sensor:

• Compass Alignment

• Global Positioning Satellite (GPS) alignment

Note: The magnetic declination must be known to align the
direction sensor to true north using a magnetic compass.
Worldwide declination information is available from the
National Space Science Data Center at:
http://nssdc.gsfc.nasa.gov/space/cgm/cgm.html.

Compass Alignment

Tools required:

• Compass

• Binoculars

• Tape (such as electrical, packing, or duct tape)

Two people are required to complete this procedure.

1. Position the wind vane so that it points in the same
direction as the mounting arm. Secure the vane on the arm
with a piece of tape so that the vane cannot rotate.

2. While standing 150 to 200 feet south of the sensor, use the
compass to determine magnetic north. If true north is the
same as magnetic north, align yourself so the compass
points north and directly at the sensor. If you are in area
with an east variation, align yourself so that the station is
that number of degrees to the east of magnetic north. If
you are in an area with a west variation, align yourself so
that the station is that number of degrees to the west of
magnetic north.

3. While viewing the sensor through binoculars, instruct
another person to rotate the arm to point the vane north.
The vane should seem to disappear from sight when
properly aligned.

4. Once you’ve obtained the correct position, secure the
sensor base and remove the tape.

GPS Alignment

Tools required:

• Handheld GPS with WAAS-enabled receiver or any

similar high accuracy GPS device

• Flag, orange cone, or other temporary marker

• Access to your HOBOlink account

This procedure requires only one person, but is easier to
complete with two people. In this procedure, you will be using
the GPS receiver first to create an arbitrary waypoint and then
to determine the bearing from the sensor to that waypoint. You
will then align the sensor so that when the vane is pointed at
the waypoint, the direction reported by HOBOlink matches the
GPS receiver’s bearing to the waypoint.

1. In HOBOlink, temporarily set the logging interval to 1 minute
or the fastest logging interval supported by the device
communication plan (if applicable). Refer to the online help
for details on operating HOBOlink.

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RXW Davis Wind Speed and Direction Sensor (RXW-WCF-xxx) Manual

2. Pick a visible location that is at least 100 meters (110 yards)
away from the sensor and walk to it. Establish a waypoint
with the handheld GPS receiver. You may want to use
averaging to minimize the waypoint position error if your
GPS receiver is so equipped. (For best results, the estimated
position error of the waypoint should be less than 10 feet if
the distance to the sensor is 100 meters, and less than 20
feet for a distance of 200 meters. Mark the waypoint with a
flag, orange cone, or other suitable marker. Walk back to
the sensor and determine the bearing to the waypoint you
just created with the GPS receiver. Again you may need to
determine the average value of the bearing to keep the
errors to a minimum.

3. Check the latest reading in HOBOlink keeping in mind that
the data is only updated when the station connects to
HOBOlink. It may take a couple of connections before the
latest reading from the mote is transmitted to the station
and then uploaded to HOBOlink. The value should match
the angle obtained with the GPS receiver. If it does not,
reposition the sensor vane so that it is pointed directly at
the waypoint flag or marker and then rotate the sensor
mounting arm as needed and wait for the next HOBOlink
reading. Repeat this until the wind direction sensor value in
HOBOlink matches the angle obtained with the GPS
receiver.

4. Once the vane is in position, secure the mounting base and
then double-check that the reported angle is correct.

Maintenance

The sensor does not normally require any maintenance other
than an occasional cleaning. If the vane becomes dirty, rinse it
with mild soap and fresh water. Do not immerse the sensor in
water or use any organic solvents to clean the unit. Do not
attempt to lubricate the wind cup shaft or bearings or the wind
vane shaft. Natural or synthetic lubricants will inhibit the
normal operation of the anemometer.

The mote is designed for outdoor use, but should be inspected
periodically. When inspecting the mote, 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.

Verifying Sensor Accuracy

It is recommended that you check the accuracy of the sensor
annually. The sensor cannot be calibrated. If the sensor is not
providing accurate data, then it is damaged or possibly worn
out if it has been in use for several years.

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 > List 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 1.2 V rechargeable NiMH batteries, charged
by the built-in solar panel. The quality and quantity of solar
light can affect whether the battery is sufficiently charged to
last through the night and cloudy periods. Make sure the mote
is placed in a location that will receive several hours of sunlight
each day. If the mote does not receive enough sunlight to
recharge the batteries, the battery life is estimated at 3–4
months. When batteries are regularly recharged, expected
battery life is estimated at 3–5 years. Battery life varies based
on the ambient temperature where the mote is deployed, the
logging interval, the number of tripped alarms, and other
factors. Deployments in extremely cold or hot temperatures
can impact battery life. Estimates are not guaranteed due to
uncertainties in initial battery conditions and operating
environment.

Mote operation will stop when battery voltage drops to 1.8 V.
Mote operation will return if the battery recharges to 2.3 V. If
the batteries are unable to be recharged, replace them with
fresh rechargeable batteries. Note: if you install used
rechargeable batteries that together are less than 2.3 V, the
mote will not resume operation.

To replace rechargeable batteries:

1. Open the mote door.

2. Remove the old batteries and install fresh ones observing
polarity.

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RXW Davis Wind Speed and Direction Sensor (RXW-WCF-xxx) Manual

3. Make sure the solar panel cable is plugged in.

3. Push in the side tab of the solar panel cable connector and
pull the connector out of the cable port.

Make sure
solar panel
cable is
installed
when using
rechargeable
batteries

4. Place the connector in the slot on the inside of the mote
door. Make sure the solar panel cables are tucked inside the
door so that they do not interfere with the interior seal
when the mote is closed.

The mote contacts the network once the new batteries are
installed. The green LED blinks quickly while the mote searches
for a network to join and then blinks slowly while it completes

Store the solar
panel connector
here when using
lithium batteries

the network registration. Once the mote has finished joining
the network, the green LED turns off and the blue LED then
blinks indefinitely while the mote is part of the network.

The mote contacts the network once the new batteries are

Lithium Batteries

You can use two 1.5 V lithium batteries (HWSB-LI) for operation
at the extreme ends of the mote operating range. 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. When using
lithium batteries, you must disconnect the solar panel cable
because the batteries will not be recharged.

To install lithium batteries:

1. Open the mote door.

2. Remove any old batteries and install the new ones

installed. The green LED blinks quickly while the mote searches
for a network to join and then blinks slowly while it completes
the network registration. Once the mote has finished joining
the network, the green LED turns off and the blue LED then
blinks indefinitely while the mote is part of the network.

WARNING: Do not cut open, incinerate, heat above 85°C

(185°F), or recharge the lithium batteries. The batteries may
explode if the mote is exposed to extreme heat or conditions
that could damage or destroy the battery cases. Do not mix
battery types, either by chemistry or age; batteries may rupture
or explode. Do not dispose of the logger or batteries in fire. Do
not expose the contents of the batteries to water. Dispose of
the batteries according to local regulations for lithium
batteries.

observing polarity.

Federal Communication Commission Interference Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one of the following measures:

• Reorient or relocate the receiving antenna

• Increase the separation between the equipment and receiver

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected

• Consult the dealer or an experienced radio/TV technician for help

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation.

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.

Industry Canada Statements

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.

Avis de conformité pour l’Industrie Canada

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1)
l'appareil ne doit pas produire de brouillage, et (2) l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le
fonctionnement.

To comply with FCC and Industry Canada RF radiation exposure limits for general population, the logger must be installed to provide a separation distance of at least 20cm from
all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.

© 2018 Onset Computer Corporation. All rights reserved. Onset, HOBO, and HOBOlink are registered

1-800-LOGGERS (564-4377) • 508-759-9500
www.onsetcomp.com/support/contact

trademarks of Onset Computer Corporation. Some material reprinted with permission from Davis
Instruments Corporation. Davis is a registered trademark of Dav is Instrumen ts Corporat ion. Mac is a
registered trademark of Apple Inc. All other trademarks are the property of their respective companies.

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