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Garmin Nexus Owner's manual

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MRC Sensor
Installation and Operation
Manual
MRC Sensor English
13-1
English MRC Sensor
13-2
This manual is written for MRC Sensor 1.20
Edition: April 2011
MRC Sensor English
13-3
1 Installation ......................................................................................................... 4
1.1 Location of the MRC Sensor .............................................................................. 4
2 Electrical installation ........................................................................................ 6
3 Setup and deviation .......................................................................................... 6
3.1 Set-up from a NX2 Multi Control Instrument ...................................................... 6
3.1.1 C35 Adjust the Roll and Trim .................................................................... 6
3.1.2 C34 Automatic compass deviation compensation (Auto DEV) ................. 7
3.2 Set-up from a NX2 Compass Data Instrument .................................................. 7
3.2.1 C34 Adjust the Roll and Trim .................................................................... 7
3.2.2 C33 Autodeviation..................................................................................... 8
4 Specifications ................................................................................................... 9
5 Warranty .......................................................................................................... 10
English MRC Sensor
13-4
MRC Sensor
Installation Manual
Thank you for choosing a Nexus product. Through this manual we would like to help
you to install your new Nexus product. Please read through this manual carefully before
starting your installation. The six axis electronic compass in the MRC measure the
magnetic course of the mast and compare that course to the course of the boat send
from the HPC Compass. The MRC Sensor then send out the Mast rotation on the
Nexus Network for the wind transducer to read. The wind transducer will then
compensate the wind angles accordingly.
An electronic compass is just as sensitive to magnetic disturbances as a magnetic
compass but has the benefits that the transducer can be mounted away from the
disturbances. From an instrument, the transducer can be automatic compensated.
1 Installation
1.1 Location of the MRC Sensor
The transducer should be mounted vertical (see pictures below). The surface may be
leaning ± 30 degrees from the horizontal or vertical plane.
It should be mounted perpendicular to the fore aft line (see picture on next page). Try to
mount the transducer reasonably well away from magnetic disturbances such as
objects containing iron, loudspeakers, etc. For safe distances, see page 3. If you have
magnetic objects inside the boat you can mount the MRC Sensor higher up the mast.
However, the optimum position for the transducer is as low as possible in the mast
since there is less movements there.
Vertical mounting
MRC Sensor English
13-5
English MRC Sensor
13-6
2 Electrical installation
The transducer is connected anywhere to the Nexus Network.
Connection in a Nexus Network
3 Setup and deviation
The MRC Sensor is adjusted and compensated from either the Multi Control or the
Compass Data instrument or the NX2 Race SW version 1.08 or later. The MRC Sensor
is compensated at the same time as the HPC Compass. If you already have a HPC
Compass installed, you still have to make the Autodeviation procedure once more.
3.1 Set-up from a NX2 Multi Control Instrument
3.1.1 C35 Adjust the Roll and Trim
In order to adjust mounting angle and set the Zero position of the
mast. Follow this procedure:
1. Make sure the boat is at 0° Roll and Trim
2. Make sure the mast is at it zero rotation position
3. Press SET for more than 2 sec.
4. Go to C30 with PAGE
5. Go to C35 with PLUS
6. Press SET.
7. Press SET again within 5 sec.
Now the Mounting angle and the zero position has been detected
Repeat step 5 and 6 above (press SET followed by SET) to fine
tune (set to zero) the Roll and Trim angles.
Nexus Network to
other NX equipment
Nexus Network to
other NX equipment
+12V
0V
OUTPUT A
OUTPUT B
GREEN
YELLOW
WHITE
SCREEN
+12V
INPUT A
INPUT B
0V
LIGHT ON
M.O.B.
SET STEER
BUZZER
NETWORK
NMEA GPS
AUXILIARY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NMEA
5
12V
+12V
0V
OUTPUT A
OUTPUT B
GREEN
YELLOW
WHITE
SCREEN
+12V
INPUT A
INPUT B
0V
LIGHT ON
M.O.B.
SET STEER
BUZZER
NETWORK
NMEA GPS
AUXILIARY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NMEA
5
12V
MRC Sensor English
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3.1.2 C34 Automatic compass deviation compensation (Auto DEV)
(Auto DEV) is performed by driving the boat in a circle up to 1¼ turn,
so that the magnetic deviation can be measured, and by that
compensated.
Set the mast in zero position.
Select calibration code C34 (Auto DEV).
Drive the boat in a circle for 1 1/4 turn in calm water. When you
start the circle manoeuvre, press SET.
The un-deviated compass course will be shown in the display as
you turn. Complete the circle up to 1 ¼ turn.
When the manoeuvre is ready, press SET to store the deviation
value.
If the deviation is corrected (Auto DEV) will be displayed.
If the deviation is not corrected, an error message will be
displayed.
Note: You will get the best result in calm water with a smooth turn
on the steering wheel independently of how the circle is
performed. When activated, you can stop the automatic compass
deviation at any time with a LONG press on SET.
3.2 Set-up from a NX2 Compass Data Instrument
3.2.1 C34 Adjust the Roll and Trim
In order to adjust mounting angle and set the Zero position of the
mast. Follow this procedure:
1. Make sure the boat is at 0° Roll and Trim
2. Make sure the mast is at it zero rotation position
3. Press SET for more than 2 sec.
4. Goto C30 with PAGE
5. Goto C34 with PLUS
6. Press SET.
7. Press SET again within 5 sec.
Now the Mounting angle and the zero position has been detected
Repeat step 5 and 6 above (press SET followed by SET) to fine
tune (set to zero) the Roll and Trim angles.
English MRC Sensor
13-8
3.2.2 C33 Autodeviation
(Auto DEV) is performed by driving the boat in a circle up to 1¼
turn, so that the magnetic deviation can be measured, and by that
compensated.
Select calibration code C33 (DEV Atd).
Drive the boat in a circle for 1 1/4 turn in calm water. When you
start the circle manoeuvre, press SET.
The un-deviated compass course will be shown in the display as
you turn. Complete the circle up to 1 ¼ turn.
When the manoeuvre is ready, press SET to store the deviation
value.
If the deviation is corrected (Auto DEV) will be displayed.
If the deviation is not corrected, an error message will be
displayed.
Note: You will get the best result in calm water with a smooth turn
on the steering wheel independently of how the circle is
performed. When activated, you can stop the automatic compass
deviation at any time with a LONG press on SET.
MRC Sensor English
13-9
4 Specifications
Type of compass sensor: Magneto resistive sensor (three axis)
Type of heel/trim sensor: Silicon sensor (three axis)
Dimensions: 102 x 57 x21mm
Weight (incl. cable): 40g
Enclosure: Water proof
Temperature range: -5 to +50 C (+40 to 122 F).
Voltage: 9-17V
Current consumption: 85mA
Power consumption @12V: 1,0W
Output signals: Nexus Network
Warranty period: 2 years, see separate conditions page 4
Maxim roll and pitch: infinite
Inaccuracy (after calibration) ±1
Vibration: 11G @ 60Hz 10min.
Magnetic field strength: 8-80uT
Safe distances to magnetic disturbing objects:
Object Safe distance
Main engine 2m (7ft.)
Radar magnetron 1.5m (5 ft.)
Horizontal and vertical steel plates and tanks 1m (3 ft.)
High power electric motors (bilge pump, refrigerators) 1m (3 ft.)
HF or VHF antennas 3m (10 ft.)
High current D.C. wires 1m (3ft.)
Magnetic meter movements and loudspeakers 1m (3 ft.)
Large bolts and fasteners 0,6m (2 ft.)
Ordinary steering compass 0,8m (2.5 ft.)
3
English MRC Sensor
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5 Warranty
MRC Sensor English
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English MRC Sensor
13-12
MRC Sensor English
13-13
Copyright ©:
Nexus Marine AB
Karlsbodavägen 20B, 161 67 Bromma, Sweden
Tel: +46 -(0) 8 – 506 939 00. Fax: +46 -(0) 8 – 506 939 01
www.nexusmarine.se
23106-1 Edition 1
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