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)
22245-A
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).
1-800-LOGGERS 2 www.onsetcomp.com
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
1-800-LOGGERS 3 www.onsetcomp.com
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