Airmar WeatherStation 110WXS Instruction manual

Record the serial number found on the underside of the WeatherStation®Instrument.
Serial No._____________________Date of Purchase_________________________
17-461-01-rev.15 01/04/19
Owner’s Guide & Installation Instructions
Ultrasonic: Smart™Sensor
WeatherStation®Instrument
Land Models:
110WX
110WXS
120WXH
150WX
150WXRS
150WXS
200WX
220WXH
Marine Models:
120WX
120WXH
220WX
220WXH
Off-shore Model:
200WX-IPX7
Patent http://www.airmar.com/patent.html

Copyright © 2008 - 2019 Airmar Technology Corp. All rights reserved.
All Rights Reserved. Except as expressly provided herein, no part of this manual may be
reproduced, copied, transmitted, disseminated, downloaded, or stored in any storage
medium, for any purpose without prior written consent of Airmar. Airmar hereby grants
permission to download a single copy of this manual and of any revision of this manual onto
a hard drive or other electronic storage medium to be viewed and to print one copy of this
manual or any revision hereto, provided that such electronic or printed copy of this manual
or revision must contain the complete text of this copyright notice and provided further that
any unauthorized commercial distribution of this manual or any revision hereto is strictly
prohibited.
Information in this manual is subject to change without notice. Airmar reserves the right to
change or improve its products and to make changes in the content without obligation to
notify any person or organization of such changes. Visit the Airmar website at
www.airmar.com for current updates and supplemental information concerning the use and
operation of this and other Airmar products.

Table of Contents
Introduction & Features...................................................................4
Functions & Outputs........................................................................5
Safety Instructions...........................................................................6
Understanding Apparent & Theoretical Wind................................7
Adding External Sensors.................................................................7
Choosing Cables & Hardware.........................................................8
Where to Purchase Parts..................................................................9
Tools & Materials..........................................................................10
Choosing the Mounting Location..................................................11
Installing........................................................................................12
Cable Routing & Connecting Guidelines......................................15
Connecting to a Data Converter, Combiner, or Splitter................16
Connecting to an NMEA 0183 Display.........................................16
Connecting to an NMEA 2000®Network......................................19
Calibrating the Compass................................................................20
Operation........................................................................................21
Maintenance...................................................................................22
Software........................................................................................ 23
Troubleshooting.............................................................................24
Technical Information....................................................................25
Abbreviations, Acronyms, Glossary, Trademarks.........................26

4
Introduction
Thank you for purchasing Airmar’s ultrasonic, WeatherStation Instrument. This
exciting product has multiple sensors in a single unit—without any moving parts.
The compact housing is waterproof with a single removable cable. Functions and
features vary by model.
Features
• Waterproof housing and cable system
• Fast response time and update rate
• Stable and accurate theoretical wind and heading data in dynamic conditions
• Can be programed to compensate for an installation that is not aligned to the
front of a boat/vehicle and/or level
• Can be calibrated to compensate for magnetic deviation caused by ferrous
metals and other electro-magnetic fields
• GPS with WAAS and EGNOS
IMPORTANT
Please read the Owner’s Guide completely
before proceeding.

5
Table 1: Functions & Outputs
110WX 110WXS 120WX 120WXH 150WX 150WXRS 150WXS 200WX 200WX- IPX7 220WX 220WXH
Apparent wind speed & angle
Theoretical wind speed &
direction
Heater
(Keeps wind channel free of ice)
Air temperature
Wind chill temperature
Barometric pressure
Relative humidity Opt. Opt. Opt. Opt. Opt.
Dew point temperature Opt. Opt. Opt. Opt. Opt.
Heat index temperature Opt. Opt. Opt. Opt. Opt.
Rain intensitya
a. The rain sensor must be stationary to produce readings.
Rain accumulationa
Rain event durationa
Peak time of rain intensitya
3D Magnetic compass heading
2D Magnetic compass heading
Heading relative to true north
Rate of Turn
Angle of pitch and roll
Rate of pitch & roll
Global Positioning System (GPS) vv
NMEA 0183: RS-232 Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt.
NMEA 0183: RS-422 Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt.
NMEA 2000®: CAN
Agriculture compatible: CAN Opt. Opt. Opt. Opt. Opt. Opt. Opt. Opt.
Key
When the Heater is ON, the Air Temperature and the Wind Chill Temperature functions
are OFF. When the Heater is turned OFF, the Air Temperature and the Wind Chill
Temperature functions resume automatically.
Opt. is an abbreviation for optional.

6
Follow the safety precautions below to reduce the risk of poor product
performance, property damage, personal injury, and/or death.
WARNING: Correct Installation Important
The WeatherStation Instrument must be installed and operated according to the
instructions in this owners guide.
WARNING: Installation Safety
Always wear safety glasses, a dust mask, and ear protection when installing.
WARNING: Do Not Install Near Artificial Magnetic Field
The WeatherStation Instrument must be a minimum of 1m (3') from ferrous metals
and anything that can create a magnetic field to prevent interference to the
magnetic compass.
WARNING: Compass-safe Distance
The WeatherStation Instrument must be a minimum of 0.3m (1') from other
standard and steering compasses.
WARNING: Electrical Safety
The power supply must be OFF before making electrical connections.
WARNING: Voltage
The power supply voltage must be that specified for the model.
• Heater models 24VDC only
• Land and off-shore models 9 - 40 VDC
• Marine models 9 - 24 VDC
WARNING: Fuse or Circuit Breaker
A safe installation requires a 0.5 amp fast-blow fuse or circuit breaker.
Heater models require a 3 amp fast-blow fuse or circuit breaker.
WARNING: Battery
Make power connections to a power source that is isolated from the engine start
battery(s). Voltage drops may cause the WeatherStation instrument to lose
information and/or change operating mode.
WARNING: Calibrating the Compass
The internal compass may need to be calibrated after the WeatherStation
Instrument is installed. Perform the pretest to determine if calibration is necessary.
WARNING: 150WX
These models incorporate a two-axis compass. Significant errors can occur in the
heading when a vehicle/boat is pitching and rolling. If there is an error in the
heading, there also will be a corresponding error in the theoretical wind direction.
Errors can be minimized or eliminated by using data from an external compass.
WARNING
Navigation Aid Only—The WeatherStation Instrument is
an aid to navigation only and should never be solely relied
upon. It is not a replacement for traditional navigation aids
and techniques. Only official government charts contain all
the information needed for safe navigation.

7
Understanding Apparent & Theoretical Wind
Virtually all mechanical and ultrasonic anemometers report apparent wind speed
and direction. The Airmar WX Series is unique because it calculates both
theoretical wind speed and direction relative to ground, and the apparent wind
speed and direction. These wind readings are the same if the unit is mounted in a
fixed location. However, if the WX Series is mounted on a moving vehicle/boat,
the apparent wind is the wind you would feel on your hand if you held it out the
window of a moving car. Since the WX Series has a built in GPS and compass, it
calculates the theoretical wind based upon the apparent wind, speed of the
vehicle, and compass heading.
Adding External Sensors
The WeatherStation Instrument can receive data from an external sensor(s). If
provided, this data will be used in the theoretical wind-speed calculations.
The following NMEA 0183 sentences can be used to provide heading data:
• $HCHDT—Heading is used for wind calculations.
• $HCHDG—Heading is used for wind calculations.
When these are seen as input, the output of these sentences is stopped.
Water-speed values can be transmitted to the WeatherStation Instrument. This
will modify the theoretical wind speed calculation to provide wind speed relative to
water, instead of wind speed relative to ground.
• NMEA 0183—VHW is used for wind speed relative to water calculation.
• NMEA 2000—PGN 128259 (water speed) is used for wind speed relative to
water calculations.
The WeatherStation Instrument will automatically detect whether a sensor(s) is
internal, external, or not available at all.
• NMEA 0183—Simply connect the external sensor(s) to a Combiner or other
NMEA 0183 repeater hardware.
• NMEA 2000—Connect the external sensor(s) to the NMEA 2000 network.
NOTE: When an external speed sensor is connected to both an NMEA 0183
device and an NMEA 2000 network, the WeatherStation Instrument will use
NMEA 2000 data.
Speed-through-water Sensor—An external speed sensor can be installed, such
as an Airmar Smart™Sensor. Airmar recommends installing the DST800 to
receive water depth, boat speed, and water temperature data.

8
Choosing Cables & Hardware
The WeatherStation Instrument can be connected to a device and/or network in
several ways. You must have the correct cable(s) and any needed
converting/connecting hardware before beginning the installation.
WeatherStation Cables (NO heater) Length Part No.
• NMEA 0183 cable 10m 33-862-02
• NMEA 2000 cable 6m 33-1029-02
• NMEA 2000 cable 10m 33-1104-01
NOTE: Additional cable lengths are available.
Connecting/Converting Hardware (NO heater) Length Part No.
• Data Converter: NMEA 0183 to USB 33-801-01
• Combiner: NMEA 0183 to USB NDC-4-AIR
• U200 Gateway: NMEA 2000 CAN to USB 33-727-01
• Splitter: NMEA 0183 & NMEA 2000 15m 33-632-01
• Splitter: NMEA 0183 & NMEA 2000 30m 33-632-02
Heater Models: Cables & Connecting Hardware
The power to the heater is greatly affected by the total length of the cable run. If
the WeatherStation Instrument will be connected to an NMEA 0183 display or a
PC and the total length of the cable run will be greater than 20m, additional steps
must be taken. To ensure there will be enough power for the heater to function
properly, the table below specifies the materials needed for each installation.
Length Part No.
• WeatherStation cable: NMEA 0183 (RS-422) 10m 33-1282-01
• WeatherStation cable: NMEA 0183 (RS-422) 20m 33-1282-02
• WeatherStation cable: NMEA 0183 (RS-422, no connector) 10m 33-1167-01
• WeatherStation cable: NMEA 0183 (RS-422, no connector) 20m 33-1167-02
• Data Converter: NMEA 0183 to USB (RS-422 < 20m cable run) 33-1081-01
• Data Converter: NMEA 0183 to USB (RS-422 > 20m cable run) 33-801-01
• Combiner: NMEA 0183 to USB NDC-4-AIR
• WeatherStation cable: NMEA 0183 Sold by the meter 06-228
• Cable: Junction Box to Data Converter/Combiner 1m 33-862-06
• Cable: Junction Box to Data Converter/Combiner 10m 33-862-02
• Cable: Junction Box to Data Converter/Combiner 15m 33-862-01
• Cable: Junction Box to Data Converter/Combiner 25m 33-862-03
• Cable: Junction Box to Data Converter/Combiner 35m 33-862-04
• Cable: Junction Box to Data Converter/Combiner 45m 33-862-05
Device &
Total length
of cable run
WeatherStation
Cable
Data
Converter
Junction
Box
Cable: J-box
to NMEA
display
Cable:
J-box to Data
Converter
Cable:14AW
G J-box to
power supply
NMEA display
< 20m 33-1167-XX — — — — —
NMEA display
>20m 33-1167-01 — 9 terminals
06-228
Length as
required
—Length as
required
PC < 20m 33-1282-XX 33-1081-01 — — — —
PC > 20m 33-1167-01 33-801-01 9
terminals —
33-862-XX
Length as
required
Length as
required

9
Mounts
CAUTION: Vehicles/boats traveling above 30MPH—Do not use the plastic
Cable Side-exit Adapter (part D) supplied. Purchase a stainless steel part. At high
speeds, the plastic adapter may break, causing the WeatherStation Instrument to
fall off.
CAUTION: 110WXS, 150WXRS, 150WXS—Do not use a ratchet mount.
Lowering the WeatherStation Instrument may damage the solar-radiation shield.
NOTE: The WeatherStation nut has standard 1"-14 UNS or 3/4" NPT threads.
Antenna mount with standard marine 1" -14 threads and pass-through for cable
(Figure 1)
Hardware to install antenna mount
Extension tube (some installations)
Parts
Humidity Sensor: 110WX, 150WX, 200WX 33-627-01
Humidity Sensor: 110WXS, 150WXRS, 150WXS 33-760-01
Where to Purchase Parts
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco USA
Tel: [phone]
email: [email protected]
Airmar EMEA Europe, Middle East, Africa
Tel: [phone]
email: [email protected]
Figure 1. Antenna mounts (not supplied)
extension
with cable
pass-through
ratchet mountdeck mount
cable
passes
through
center
deck mount
of mount
cable
pass-
with extension tubecenter pass-through side pass-through
through
Copyright © 2007 Airmar Technology Corp.

10
Tools & Materials
Safety glasses
Dust mask
Ear protection
Pencil
Level
Electric drill
Drill bits
Phillips screwdrivers
Teflon pipe-thread tape (optional)
Deck gland (some installations)
Grommets (some installations)
Cutting pliers (some installations)
Wire strippers (some installations)
Heat-shrink tubing (some installations)
Heat gun (some installations)
Multimeter (some installations)
Cable ties (some installations)

11
Choosing the Mounting Location
For accurate readings and a reliable GPS signal, selecting the best location for
the WeatherStation Instrument is very important. Easy access and appearance
should be secondary considerations. Since each installation is unique, the best
separation distances will vary depending on the surroundings and the particular
equipment and how it is configured. Choose a location that balances the
requirements below:
•The WeatherStation Instrument must be mounted in “clear air”, away from
obstructions in any direction that will interfere with air flowing through the unit. If
there is an obstruction, be sure to mount the WeatherStation Instrument at least
2m (6') away. On land, avoid obstructions such as roofs, chimneys, trees, etc.
• If possible, mount the WeatherStation Instrument higher than any other object.
Mount it a minimum of 500mm (20") above the surrounding surfaces.
NOTE: The higher the WeatherStation Instrument is mounted, the less accurate
the pitch and roll readings will be.
• To prevent interference to the internal magnetic compass:
- Mount a minimum of 0.3m (1') from other standard and steering compasses.
- Mount a minimum of 1m (3') from any structures or equipment that contains
ferrous metals.
- Mount a minimum of 1m (3') from anything that may create a magnetic field
such as magnetized materials, electric motors, electronic equipment,
engines, generators, power/ignition cables, and batteries. For distances,
follow the respective manufacturer’s recommendations.
• To prevent interference to the internal GPS (Figure 2):
- It must have a clear view of the sky to receive satellite signals. A 120° view is
optimal. Check for any obstructions such as other boats or buildings.
- Mount it as far as possible from high-powered transmitting antennas to avoid
mutual interference.
- Mount it lower than any Inmarsat communications antenna.
- Mount above or below any radar beam. Do not mount within a radar beam.
Min. 2m
antenna insulator
metal surface
1.5m
Min.
Min. 2m
WeatherStation
Figure 2. Antennas

12
Installing (Figure 3)
CAUTION: The reflector plate and the waterproof film found in the wind channel of
the WeatherStation Instrument are essential to its operation. Be careful not to
scratch the plate, puncture the film, or damage them in any way.
CAUTION: The WeatherStation Instrument must be installed upright and vertical,
not tilted to one side. It must be level and plumb. If the WeatherStation Instrument
is tilted from the horizontal plane, it may introduce errors in the compass and wind
readings.
CAUTION: To accurately measure the wind direction and heading, the alignment
notch on the WeatherStation Instrument must be pointed correctly.
• Moving vehicle/boat—The alignment notch must point forward and be
parallel to the centerline of the vehicle/boat.
• Stationary surface—It is recommended that the alignment notch point toward
true north.
CAUTION: Tighten or align the WeatherStation Instrument by grasping the lower
housing below the reflector plate. Hand tighten only.
• Do not rotate the cap. Turning it may sever internal connections and void the
warranty.
• 110WXS, 150WXRS, 150WXS—Do not grasp the solar-radiation shield. The
louvers may break.
CAUTION: If you use a thread lock, use Teflon pipe-thread tape. Do not use a
liquid thread lock as it may weaken the plastic, causing it to swell and crack.
reflector plate
waterproof film
wind channel
(where air travels
through the unit)
(heated)
Figure 3. WeatherStation Instrument with heater (120/220WXH shown)
cap
lower housing
alignment
notch
heater
Copyright © 2008 - 2018 Airmar Technology Corp.
side view bottom view
humidity sensor

13
Permanent Mounting
1. Place the mounting hardware at the selected location. Orient any cable exit in the
direction that you want the cable to travel (Figure 4).
2. Position the mounting hardware at a 90° angle to the mounting surface. If
necessary, use shims to make the mounting surface level.
3. Mark the holes for the mounting screws. If the cable will pass through the
center of the mount, also mark that hole.
NOTE: If you are using a ratchet mount, be sure you have purchased an
extension with a cable pass-through. Do not use a ratchet mount with the
110WXS, 150WXRS or 150WXS that has a solar-radiation shield.
4. Drill the holes for the mounting screws and the cable exit if necessary. If the
cable is to be fed through a deck, install a high quality deck gland.
5. Using purchased screws, fasten the mount in place.
6. Screw an extension tube onto the antenna mount if desired.
Figure 4. Installation (150WX shown)
nut assembly
extension tube
antenna mount
cable exit
alignment
(some installations)
(most installations)
(some installations)
notch
lower housing
Copyright © 2007 - 2018 Airmar Technology Corp.

14
Attaching the Cable to the WeatherStation Instrument
1. With the nut assembly on the cable near the WeatherStation connector, thread
the cable through the extension tube (if used), antenna mount, and the cable
exit. Be sure to leave several inches of cable extending beyond the nut assembly
(Figure 5).
2. Screw the nut assembly onto the top of the antenna mount /extension tube.
Hand tighten only. Do not over-tighten.
NOTE: If you use a thread lock, use teflon pipe thread tape only.
3. Remove the protective cover from the connector. (Save the cap to protect the
connector, when the WeatherStation Instrument is removed.) Plug the
connector into the WeatherStation Instrument. The alignment key on the
connector fits into a notch in the base of the WeatherStation Instrument.
4. To accurately measure the wind direction, be sure to orient the alignment notch
correctly. Grasp the lower housing of the WeatherStation Instrument below the
reflector plate and hold it in the proper position (Figure 3).
• Moving vehicle/boat—The alignment notch must point forward and be
parallel to the centerline of the vehicle/boat.
• Stationary—It is recommended that the alignment notch point toward true
north.
5. Slide the captive nut upward and screw it onto the lower housing of the
WeatherStation Instrument (Figures 4 and 5). Hand tighten only. Do not over-
tighten. Be careful not to rotate the WeatherStation Instrument, changing the
alignment or loosen the nut assembly from the antenna mount/extension tube.
Figure 5. Attaching the cable to the WeatherStation Instrument
WeatherStation
nut assembly
captive
nut
alignment
key
connector
antenna mount
or extension tube
Copyright © 2007 - 2011 Airmar Technology Corp.

15
Cable Routing & Connecting
Depending on the equipment you will be using, route the WeatherStation cable to
a Converter, Combiner, Splitter, an NMEA 0183 display, or an NMEA 2000
network. After reading the cautions below, go to the appropriate instructions.
CAUTION: Do not remove the waterproof connector(s) to ease cable routing.
Buy a cable without a connector. Instructions for wiring are supplied.
CAUTION: To reduce electrical interference from other electrical wiring and any
on-board equipment with strong magnetic fields such as: radar equipment, radio
transmitters, engines, generators, etc., separate the cables by at least 1m (3').
Ensure that all the cable shields are appropriately grounded.
CAUTION: Be careful not to tear the cable jackets when passing them through
compartments, bulkheads, or walls. Use grommets to prevent chaffing.
CAUTION: Use a multimeter to check the polarity and the connections to the
power supply before applying power to the WeatherStation Instrument.
CAUTION: Coil any excess cable(s) and secure it with cable ties to prevent
damage.
CAUTION: Heater model with cable run greater than 20m (60')—The power to
the heater is affected by the total length of the cable run. If the cable run is greater
than 20m (60'), additional hardware is needed to ensure that enough power will
reach the heater to function properly.
• PC—Connect through a Data Converter or Combiner. Follow the instructions
that are supplied with the hardware.
• NMEA 0183 display—Follow the instruction, “Connecting to an NMEA 0183
Display.”

16
Connecting to a Data Converter, Combiner, or Splitter
IMPORTANT: To connect to a PC it is necessary to install a Data Converter or
Combiner. Follow the installation instructions that are supplied with the unit.
Connecting to an NMEA 0183 Display
Cable Routing
Route the WeatherStation cable to the display. Do not fasten the cable in place at
this time.
Heater model with cable run greater than 20m (60')—Route the WeatherStation
cable to a junction box (Figure 6). Route a separate cable from the junction box to
the NMEA display. Route red and black 14AWG wires from the junction box to a
24VDC power supply. Do not fasten the cables and wires in place at this time.
Wire the junction box using the wiring diagram below (Figure 7) To prepare the
cables, follow “Preparing the Wires”.
11
22
33
44
55
66
77
88
99
Figure 6. Wiring the junction box (not to scale)
Copyright © 2016 Airmar Technology Corp.
[10m (30')]
power
supply
NMEA 0183
display
WeatherStation
junction box
Instrument
33-1167-01
06-228
red wire
(14AWG)
black wire
(14AWG)
(24VDC)
Figure 7. Heater models with a cable run greater than 20m (60')
Copyright © 2016 Airmar Technology Corp.

17
Connector on Display End
If the WeatherStation cable has a connector on the display end, and it can be
plugged into the port on the NMEA 0183 display; do so now. Coil any excess
cable and secure it with cable ties to prevent damage. Fasten the cable in place.
No Connector on Display End: Wiring
CAUTION: The WeatherStation Instrument has either an RS-422 or RS-232
standard. Follow the wiring diagram that matches the WeatherStation Instrument.
If it is wired for the wrong standard, it will not transmit and receive data properly.
CAUTION: The display power may be wired directly to the WeatherStation cable,
or it may be wired separately.
Heater models MUST be wired separately.
CAUTION: Heater models—It is recommended to use the same 24VDC power
supply for both the WeatherStation Instrument and the heater. If using separate
power sources, ensure that the supply grounds are common.
Preparing the Wires
NOTE: If the display does not have NMEA 0183 output connections, the yellow
and orange wires are not needed. Apply heat-shrink tubing to each unused wire.
Alternatively, the yellow and orange wires can be connected to an external sensor.
1. Allowing an extra 25 cm (10") for wiring ease, cut the cable to length.
2. Strip 60mm (2-1/2") of the outer jacket and foil shielding from the cut end of the
cable (Figure 8 or 9).
3. Strip 10 mm (3/8") of conductor insulation from the end of each colored wire.
4. Protect the cable’s foil shielding from causing a short by using heat-shrink tubing
around the jacket where the wires emerge from the cable. The tubing must
overlap the wires a minimum of 6mm (1/4"). Shrink the tubing using a heat gun.
5. Being sure the power supply is OFF, connect the wires to the display.
6. Fasten the cable in place.
7. The installation is complete. To begin receiving data, refer to the owner’s
manual that came with the display.

18
Connecting
Refer to the appropriate wiring diagram and the owner’s manual that came with
the display to connect the colored wires.
NO heater—(Figure 8).
Heater models—(Figure 9)
Figure 8. NMEA 0183 WeatherStation Cable—no heater
WeatherStation
BARE
x
10
10
RS422
connector RS232
V+
V-
TX OUT
RX IN
NO CONNECTION
NO CONNECTION
SHIELD
locator
V+
V-
A /+ OUT
A/+ IN
B/- IN
B/- OUT
SHIELD
Copyright © 2007 - 2014 Airmar Technology Corp.
or
optional optional
Figure 9. NMEA 0183 WeatherStation Cable—for heater models
WeatherStation
10
RS422
connector
RS232
locator
V -
TX OUT
RX IN
No Connection
No Connection
SHIELD
V +
V +
V -
A /+ OUT
B /- OUT
HEATERV + (24 VDC)
HEATER V - (GND)
A / + IN
B /- IN
SHIELD
V +
V -
A /+ OUT
B /- OUT
HEATER V +
HEATER V -
A / + IN
B /- IN
SHIELD
HEATERV + (24 VDC)
HEATER V - (GND)
Copyright © 2011 - 2019 Airmar Technology Corp.
or optionaloptional
GREY

19
Connecting to an NMEA 2000®Network
CAUTION: Models with a heater cannot be used with an NMEA 2000 network.
CAUTION: Only two termination resistors are required on an NMEA 2000
network. More than two will degrade the bus performance.
Route the WeatherStation cable to the NMEA 2000 network. Plug the NMEA 2000
connector into the network node (Figure 10). Coil any excess cable and secure
with cable ties to prevent damage.
NOTE: WeatherStation cables greater than 6m (20') have a termination resistor
built into the WeatherStation connector (Figure 11).
Figure 10. NMEA 2000 WeatherStation Cable [6m (20') shown]
10
WeatherStation NMEA 2000
network
connector
connector
locator
10
Copyright © 2008 - 2011 Airmar Technology Corp.
Figure 11. NMEA 2000 WeatherStation Cable [10m (33') shown]
10
WeatherStation
connector NMEA 2000
network
connector
locator
120Ω
termination resistor in connector
10
Copyright © 2009 - 2011 Airmar Technology Corp.

20
Calibrating the Compass
WARNING: The internal compass may need to be calibrated after the
WeatherStation Instrument is installed for maximum accuracy. Perform the pretest
below to determine if calibration is necessary.
CAUTION: Boat—The Pretest and AutoCalibration Procedure must be done in
calm seas in a 0.8 km (0.5 mile) open area away from other boats and ferrous
objects such as structures and aids to navigation. Avoid congested areas and
waters with strong currents as calibration will be difficult and possibly hazardous.
Pretest
Go to an appropriate site.
• Vehicle—Drive to an open parking lot or field, away from other vehicles and
ferrous objects.
• Boat—In calm seas, navigate to an open area of water, 0.8 km (0.5 mile) of
open space away from other boats and ferrous objects.
While making a full circle, compare the WeatherStation heading data to another
compass. Check all headings. If the data agrees, there is no magnetic influence
on the WeatherStation Instrument. The compass does NOT need to be calibrated.
If the data does not agree, continue with the calibration instructions below.
How to Calibrate
Calibration can be done in one of two ways.
• Calibrate the compass using the WeatherCaster™ software and a PC.
• Follow the AutoCalibration Procedure below.
AutoCalibration Procedure
IMPORTANT: Calibration requires the vehicle/boat to complete 2 to 3 circles.
IMPORTANT: In the event of a calibration failure, repeat the procedure.
1. At the site where the pretest was performed, select the display page on the
NMEA Instrument that shows Heading.
2. Shut OFF and then turn ON the DC power that is connected to the
WeatherStation Instrument.
3. Within 2 minutes of cycling power to the WeatherStation Instrument, start the
vehicle/boat in a slow [4.5 to 7 MPH (4 to 6 knots)] circular turn that takes about
2 to 3 minutes to complete.*
If the vehicle/boat completes 1.5 circles within 3 to 4.5 minutes, AutoCalibration
will begin. Heading will stop being reported on any NMEA 0183 or NMEA 2000
display until the calibration is finished.
4. Keep turning in the same circle for 1 to 2 more complete circles.
Do not change the speed or rate of turn through the circle.
5. When calibration is completed successfully, Heading will return to the display.
If calibration fails, the display will flash Heading ON and OFF in 10 second
intervals for 60 seconds. (Display times may vary by manufacturer.)
* The optimum rate of turn is 180°/ minute: 3°/second, 30°/10 seconds, 45°/15 seconds,
and 90°/30 seconds.