Onset S-WCB Specifications
R.M. Young Wind Sensor Adapter (S-WCx-M003) Manual
This document provides instructions for connecting R.M. Young 05305 and 05103 Wind
Monitors to the applicable Onset adapter (S-WCB-M003 for 05305 and S-WCE-M003 for 05103)
to allow the wind sensor to be used with a smart sensor-compatible HOBO® station.
Note: Refer to the R.M. Young instruction manual for your wind sensor for additional
information as needed.
Specifications
Wind Speed/Gust* Wind Direction
R.M. Young Wind Sensor
Adapter
Models: S-WCB-M003
S-WCE-M003
Tool Required:
• Screwdriver
Measurement Range S-WCB-M003: 0 to 50 m/s (0 to
Accuracy 0.20 m/s (0.46 mph) 1.4 degrees
Resolution 0.20 m/s (0.46 mph) 1.4 degrees
Operating Temperature Range -40°C to 75°C (-40°F to 167°F)
Environmental Rating
Bits per Sample 8 for each channel, 24 total
Number of Data Channels* 3
Measurement Averaging Option Automatic averaging (see Measurement Operation below)
Cable Length from Adapter to
Data Logger*
Cable Length from Adapter to
Wind Sensor
Housing Dimensions 14 cm (5.5 in) long x 2.7 cm (1.05 in) diameter; Add 5.6 cm (2.2 in) to
* A single HOBO station can accommodate 15 data channels and up to 100 m (328 ft) of smart sensor cable (the digital
communications portion of the sensor cables). Smart Sensor Extension Cable Part No. S-EXT-M0xx.
112 mph)
S-WCE-M003: 0 to 52 m/s (0 to
116 mph)
Weatherproof
3 m (9.8 ft)
45.7 cm (18 in)
length for grommets
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
0 to 355 degrees, 5 degrees dead
band
Measurement Operation
Wind speed and direction measurements are averaged over the logging interval or a 3-second
timeframe (whichever is greater). If you set up the sensor to log faster than every 3 seconds,
the same sensor reading will be recorded until a new 3-second average is calculated. For
example, if the sensor is logging at a 1-second interval, the sensor will report the same wind
speed and direction (its calculated average) for three samples before calculating and reporting
a new value for another three samples. Gust speed is the highest three-second wind recorded
during the logging interval.
Direction Averaging
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.
Adding an Extension Cable between the Wind Sensor and Adapter
Up to 61 m (200 ft) of shielded, 22 AWG 5-conductor cable can be added between the wind
sensor and the wires exiting the adapter. Extension cable wires can be connected to the
adapter wires using weatherproof wire nuts. Make sure that both cables are secured such that
the wire connections do not get pulled during deployment.
12745-G MAN-S-WCX
R.M. Young Wind Sensor Adapter (S-WCx-M003) Manual
Connecting the Wind Sensor to the Adapter
Step 1: Remove Junction Box Cover
Unscrew the cover from the PCB junction box on the R.M.
Young wind sensor.
Step 2: Insert Cable into Junction Box
Loosen the nut on the junction box grommet and then insert
the grey cable from the Onset S-WCx-M003 adapter into
grommet. The heat shrink on the cable end should sit inside the
grommet body.
R.M. YOUNG WIND SENSOR
(note: some models may look different)
PCB MOUNTED IN JUNCTION BOX
(CONNECT CABLE FROM S-WCx-M003
ADAPTER TO SCREW TERMINAL BLOCK
ON PCB PER WIRING DIAGRAM)
WS SIG
WD SIG
WS REF
WD REF
EARTH GND
WD EXC
SHIELD (white/green)
WIRING DIAGRAM
RED
GREEN
WHITE
BROWN
BLACK
CABLE from S-WCx-M003 ADAPTER
S-WCx-M003 ADAPTER
Step 3: Connect Cable to PCB
Connect shield, black, brown, white, green, and red wires to
PCB screw terminal block as shown in wiring diagram below. Be
sure wires are fully secured in the terminals. Re-tighten
grommet nut and replace cover.
Step 4: Mount the Wind Sensor
The diagram below shows the recommended mounting for the
wind sensor. Secure the adapter to the mast with two cable ties
crossed together. Be sure to put drip loops on either side of the
adapter housing as shown below to protect the adapter from
water. Secure the cables to the mast with cable ties at the end
of each drip loop.
TO SMART SENSOR-COMPATIBLE
DATA LOGGER
RECOMMENDED MOUNTING
© 2011–2015 Onset Computer Corporation. All rights reserved. Onset and HOBO are trademarks or
1-800-LOGGERS (564-4377) • 508-759-9500
www.onsetcomp.com • loggerhelp@onsetcomp.com
registered trademarks of Onset Computer Corporation. All other trademarks are the property of
their respective companies.
12745-G MAN-S-WCX
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