Distributed by
Any reference to Raytheon or
RTN in this manual should be
interpreted as Raymarine.
The names Raytheon and RTN
are owned by the
Raytheon Company.
TOP BLEED
Position
for
SeaTalk
2 colour
logo
ST 30
COMPASS
Operation and
Installation
Raytheon Marine Europe, Anchorage Park, Portsmouth
P03 5TD, England
Telephone (01705) 693611. Fax (01705) 694642
ST30 Compass Installation and Operation Handbook
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D1790-1
Autohelm and SeaTalk are registered Trade marks of Nautech Limited
The technical and graphical information contained in this handbook, to the best of our knowledge,
was correct as it went to press. However, the Autohelm policy of continuous improvement and
updating may change product specifications without prior notice. Therefore, unavoidable differ-
ences between the product and handbook may occurr from time to time, for which liability
cannot be accepted by Autohelm.
Copyright Raytheon Marine Europe 1995
Printed in England
ST30 Compass Installation and Operation Handbook
Package Contents
Checking your ST30 Compass Package
The ST30 Compass package contains the following standard items:
1. Display head
2. Fixing studs (2)
3. Thumb nuts (2)
4. Fitting template
5. Sun cover
6. Fluxgate compass
7. Power cable
8. Daisy-chain cable
9. Self-tapping screws (4)
10. Installation and Operation handbook
11. Worldwide Service Centre booklet
12. Warranty document
Items Missing?
If any of the above items are missing or damaged, please contact your
Autohelm dealer or our Product Support Department to obtain replace-
ment parts. Please note that missing or damaged items cannot be
replaced without proof of purchase.
Registering this Product
Once you have checked that you have all of the listed components, please
take the time to complete the warranty document and return it to your
national distributor.
By returning this document you will receive prompt and expert attention
should you ever experience any difficulties with this product. Also, your
details are added to our customer database so that you automatically
receive new product brochures as and when they are released.
ST30 Compass Installation and Operation Handbook
Package Items
ST30 INSTRUMENT
MOUNTING TEMPLATE
2
4
3
1
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2-HOLES
DRILL 5mm
( .197in ) DIA
1-HOLE
DRILL 60.3mm
( 2,3/ 8in ) DIA
CO MPASS
5
6
Se a Ta lk
7
8
9
WARRANTY
Terms and Conditions
WORLDWIDE
SERVICE CENTRES
ST30
COMPASS
Operation and
Installation
10
11
12
D1789-1
ST30 Compass Installation and Operation Handbook
Contents
Contents
Chapter 1: Introduction ........................................................ 7
Chapter 2: Installation .......................................................... 9
2.1 Compass Installation Options .......................................... 9
2.1 Installing the Fluxgate Compass ..................................... 10
2.2 Siting of the Display Head ............................................. 12
2.3 Mounting the Display Head ............................................ 13
2.4 Flush Mounting the Display Head .................................... 14
2.5 Trunnion Mounting the Display Head ............................... 15
2.6 Power supply (Stand-alone operation) .............................. 15
2.7 Power supply & Data Transfer (SeaTalk system) ................ 16
Chapter 3: Calibration ........................................................ 17
3.1 About this Chapter ...................................................... 17
3.2 User Calibration .......................................................... 17
Manual Compass Linearisation ..................................... 17
Heading Alignment ..................................................... 19
Quitting Manual Linearisation & Heading Alignment ..... 19
3.3 Linearisation & Heading Alignment when used
with a SportPilot ............................................................... 20
3. 4 Extended Calibration ................................................... 20
Calibration ON/OFF .................................................... 21
Boat Show Mode ....................................................... 22
Heading Display Damping ............................................ 22
Off-Course Bargraph Damping ...................................... 23
Quitting Extended Calibration .............................................. 23
Quitting without Saving ......................................... 23
Quitting and Saving .............................................. 23
3.4 Master and Repeater Modes ......................................... 23
3.5 Software Version ........................................................ 24
ST30 Compass Installation and Operation Handbook
Chapter 4: Operation ......................................................... 25
4.1 General ..................................................................... 25
4.2 Heading Mode ............................................................ 25
4.3 Lock Mode ................................................................ 26
Reciprocal Locked Heading ......................................... 26
Adjusting the Locked Heading ...................................... 27
Lock Mode Heading Error ............................................ 27
4.3 Average Heading ........................................................ 28
Resetting the Average Heading ..................................... 28
4.4 LCD Illumination .......................................................... 29
4.5 No Data .................................................................... 29
Chapter 5: Fault Isolation & Maintenance .............................. 31
5.1 Fault Isolation ............................................................. 31
5.2 Maintenance .............................................................. 32
Chapter 6: Specification ..................................................... 33
Chapter 1: Introduction
7
Chapter 1: Introduction
Congratulations on the purchase of your Autohelm ST30 Compass.
The compass displays heading information directly from the fluxgate
compass or, if the unit is used as a repeater, via the SeaTalk bus using
data taken from another compass instrument or autopilot.
The compass can also be used as a steering indicator to maintain a
given course. Any helmsmans error, to port or starboard, is indicated by
a bargraph at the bottom of the display. This mode is known as “Lock”
mode.
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ST30 Compass Installation and Operation Handbook
8
Important Information
All Autohelm equipment and accessories are designed to the highest standard
for use in the leisure marine environment.
Their design and manufacture conforms to the latest Electromagnetic
Compatibility (EMC) standards, but good installation is required to ensure that
performance is not compromised. Although every effort has been taken to
ensure that they will perform under all conditions, it is important to understand
what factors could affect the operation of the product. To avoid the risk of
EMC problems, all Autohelm equipment and cables connected to it should be;
❏ At least 1m (3 feet) from any equipment transmitting or cables carrying
radio signals e.g. VHF radios, cables and antennas. In the case of SSB
radios, the distance should be increased to 2m (7ft).
❏ At least 20m (66 feet) from large vessels equipped with radar.
❏ More than 2m (7 feet) from the direct path of a radar beam.
The following points should also be noted;
❏ Genuine Autohelm cables should be used at all times. Cutting and rejoining
these cables can compromise EMC performance and so should be
avoided unless doing so is detailed in the installation manual.
❏ Autohelm equipment should be serviced only by authorised Autohelm
service engineers. They will ensure that service procedures and replace-
ment parts used will not affect EMC performance. There are no user
serviceable parts in any Autohelm product.
❏ Voltage drops below 10v in the power supply to our products can cause
the equipment to reset. This will not damage the equipment but will cause
the loss of some information and can change the operating mode. This
most frequently happens during engine starting, and so to reduce the risk
of this occurring, it is recommended that the equipment is supplied from a
different battery than the one used for engine start.
❏ Some products generate high voltages, and so never handle the cables/
connectors when power is being supplied to the equipment.
❏ Always check the installation before going to sea to make sure that it is not
affected by radio transmissions, engine starting etc.
❏ In some installations, it may not be possible to prevent the equipment from
being affected by external influences. In general this will not damage the
equipment but can lead to it resetting, or momentarily result in faulty
operation.
Please keep these notes for future reference.
Chapter 2: Installation
9
Chapter 2: Installation
This chapter covers installation of the fluxgate compass and the display
head. Please read these instructions thoroughly before you attempt to
install the display head and fluxgate compass.
2.1 Compass Installation Options
The ST30 Compass can be used in one of the following ways:
❏ as a stand alone system comprising of display head and fluxgate
compass with an independent power supply. Heading data is sent
directly to the compass display head.
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Stand alone compass system: 1 Master compass instrument 2 Power cable
❏ as a repeater head for a master compass instrument. Power and data
is received via SeaTalk.
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2
3
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1
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Master with repeater instrument: 1 Master instrument 2 SeaTalk daisy-chain cable
3 Repeater instrument 4 Power cable or SeaTalk cable
ST30 Compass Installation and Operation Handbook
10
❏ as a repeater for an autopilot compass. Power and data is received
via SeaTalk.
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1
2
3
4
D1806-1
ST30 Compass & autopilot: 1 SeaTalk cable 2 Repeater instrument 3 SeaTalk cable
4 SeaTalk autopilot
Important note...
When the ST30 Compass is used with a SportPilot the fluxgate compass
must be connected to the SportPilot and not the display head.
2.1 Installing the Fluxgate Compass
76mm (3in)
76mm (3in)
D729-2
The fluxgate compass should, ideally, be sited on a forward facing
bulkhead with the Autohelm logo facing forwards. The compass should
also be as close to the pitch and roll centre of the vessel as possible and
sited (at least 0.8m) away from iron masses that cause deviation.
Chapter 2: Installation
11
0.3L to 0.5L
L
0.3L to 0.5L
L
D194-1
1. With a hand bearing compass fixed to the proposed bulkhead, turn
your vessel through 360° and check that the difference between the
hand bearing compass and the ships compass does not exceed 10°
on any heading. If difference does exceed 10° you will have to select a
new location.
2. Once you have selected a suitable location, attach the fluxgate
compass to the bulkhead using the four self-tapping screws provided.
3. Make sure that the fluxgate compass is correctly orientated. That is,
the arrow and the word UP embossed into the compass flange is
pointing skywards and the top of the flange is level - the fluxgate
compass will not operate if it is installed incorrectly.
Vertical
D193-1
ST30 Compass Installation and Operation Handbook
12
3. Run the cable back to the display head, fixing the cable at regular
intervals with cable clamps/ties.
4. Crimp the spade connectors to the five wires from the
compass cable.
2.2 Siting of the Display Head
42mm (1.65in)
24mm (1.0in)
110mm (4.33in)
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The ST30 Compass should be installed above or below deck where it is:
❏ easily read by the helmsman (normally viewed at eye level)
❏ protected from physical damage
❏ at least 230mm (9in) from the ships compass
❏ at least 500mm (20in) from radio receiving equipment
❏ accessible from behind for ease of installation and cable running
Notes...
To prevent the build-up of moisture, the display head breathes through the
back cover. The display head must, therefore, be mounted where the
back cover is protected from direct contact with water.
The rear case is fitted with a foam gasket to form a water-tight seal
between the display head and the installation bulkhead. Under no circum-
stances must silicone sealants be applied to this gasket.
Chapter 2: Installation
13
2.3 Mounting the Display Head
6
5
4
3
2
1
D682a
1 Display head 2 Sealing gasket 3 Fixing studs 4 SeaTalk or power cable
5 Fluxgate compass cable 6 Thumb nuts
1. Make sure the bulkhead to which the display head (1) is to be mounted
is smooth, flat, and clean.
2. Use the fitting template (supplied) to mark the centres for the two
fixing studs and the display head cable boss.
Please note...
To allow for the fitting of protective covers, adjacent instruments
must have a 6mm (1/4in) gap between them (116mm centre to
centre min.).
3. Drill two 5mm (0.2in) diameter holes for the fixing studs (2).
4. Using a 60mm (2.375in) diameter cutter, drill a location hole for the
instrument connector boss.
5. Plug the moulded end of the power cable in to one of the SeaTalk
terminals.
ST30 Compass Installation and Operation Handbook
14
6. Connect the fluxgate compass cables, colour for colour, to the
display head (1) compass terminals (the black core goes to the grey
terminal).
+
+
SEATALK
+
+
1
2
3
4
5
D1807-1
Fluxgate compass to display head connections: 1 Red cable 2 Black cable 3 Blue
4 Green 5 Yellow
7. Attach the display head to the bulkhead using the fixing studs (2) and
thumb nuts (3).
2.4 Flush Mounting the Display Head
The ST30 Compass display head can be flush mounted to provide a “low
profile” installation. Full installation procedures are supplied with the flush
mounting kit (part number D217).
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Chapter 2: Installation
15
2.5 Trunnion Mounting the Display Head
The display head may also be trunnion mounted using the custom
Autohelm mounting kit (part number D219).
D1793-1
Note...
Because the ST30 Compass breathes around the integral connector pins,
trunnion mounted instruments must be sited in areas protected from the
weather and direct contact with water.
2.6 Power supply (Stand-alone operation)
Caution: The ST30 Compass is for use with 12V supplies only.
For stand-alone operation, use the supplied 1m power cable supplied.
1. Plug the moulded end of the power cable into to one of the 'SeaTalk'
connections in the rear of the display head. Run the free end back to
the vessels distribution panel.
2. Cut the cable to length and connect the red wire to 12V and the
screen to 0V. Protect the circuit with a 5A fuse/circuit breaker.
+
+
SEATALK
+
+
5A
+
Red
12v Supply
Screen
–
D1791-1
ST30 Compass Installation and Operation Handbook
16
2.7 Power supply & Data Transfer (SeaTalk system)
When the ST30 Compass is part of a SeaTalk system, power and data is
transmitted via the daisy-chain cable or one of the Standard Autohelm
SeaTalk Extension or Interface Cables.
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+
12v Supply
–
SeaTalk cable
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Chapter 3: Calibration
17
Chapter 3: Calibration
3.1 About this Chapter
Before the ST30 Compass system can be used as a navigational aid, the
fluxgate compass MUST be linearised to compensate for deviation and the
displayed heading MUST be aligned to a known transit bearing.
Other calibration features allow you to adjust the speed at which the
heading and heading error displays are updated.
3.2 User Calibration
User calibration contains features to perform compass linearisation and
heading alignment.
Manual Compass Linearisation
For first-time installation, the fluxgate compass must be manually
linearised to compensate for deviation.
1. Press
and LOCK together for 2 seconds to open the initial
calibration menu.
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ST30 Compass Installation and Operation Handbook
18
2. Press LOCK to advance to the manual linearisation display. The
magnetic North indicators rotate to indicate that you are in
linearisation mode.
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3. With a boat speed around 2 knots, start turning your vessel in a
very slow circle.
D919-1
Please note...
If you turn your vessel too quickly the display changes to read SLO and the
buzzer sounds.
4. Keeping turning your vessel until the display begins to alternate
between the heading and deviation displays and the magnetic North
indicators stop rotating.
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Chapter 3: Calibration
19
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Please note...
If the deviation exceeds 10° the fluxgate compass should be resited.
Heading Alignment
Once the compass has been successfully linearised, you must match the
displayed heading to a known transit bearing.
1. From the compass deviation display, simply press
advance to heading alignment.
or to
2. Press the
or key to adjust the displayed heading to match the
known transit bearing.
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Quitting Manual Linearisation and Heading Alignment
To quit manual linearisation and/or heading alignment and return to normal
compass operation, simply press
and LOCK for 2 seconds.
Quitting without storing changes!
You can quit Manual Linearisation and Heading Alignment without storing
any adjustments by simply pressing
.
ST30 Compass Installation and Operation Handbook
20
3.3 Linearisation and Heading Alignment when
used with a SportPilot
Because the Autohelm SportPilot does not have a digital read-out, the
ST30 Compass can be used to repeat heading information received from
SportPilot fluxgate compass.
To display accurate heading information, the SportPilot fluxgate compass
must be linearised and then aligned to a known transit bearing as de-
scribed in section 3.2.
Please note...
When the ST30 Compass is used with a SportPilot system, the SportPilot
must have a fluxgate compass connected to it.
3. 4 Extended Calibration
Extended calibration contains features to:
• restrict access to the user calibration menu
• start the dealer demonstration programme
• adjust the heading display damping
• adjust the off-course bargraph damping
1. At the heading or locked heading display, press and hold and
LOCK for 15 seconds. After 15 seconds the compass display
displays “CAL”.
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Chapter 3: Calibration
21
2. Press
and momentarily to enter extended calibration.
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Calibration ON/ OFF
This feature is used to restrict access to the user calibration menu
to prevent accidental adjustment of the linearisation and heading align-
ment features.
Calibration is toggled on and off by pressing the
or key.
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Press LOCK to advance to “Boat Show” mode or exit extended calibration
as described on page 23.
ST30 Compass Installation and Operation Handbook
22
Boat Show Mode
This is a programme that simulates heading information for dealer
demonstration purposes.
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Boat show mode is toggled on (S1) and off (S0) using the
or key.
Press LOCK to advance to “Heading Display Damping” or exit extended
calibration as described on page 23.
Heading Display Damping
The heading displayed by the ST30 Compass is the average reading taken
from the fluxgate compass. Damping controls the number of readings
used in each averaging calculation. The higher the value displayed at the
damping display the slower the screen update of heading information.
The default value is d4 which can, if so required, be adjusted using the
or key.
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Press LOCK to advance to “ Off-Course Bargraph Damping” or exit
extended calibration as described on page 23.
Chapter 3: Calibration
23
Off-Course Bargraph Damping
This feature controls the rate at which the off-course bargraph is updated.
The factory default setting is 4 which can, if so required, be adjusted using
the
or key. The higher the value displayed the slower the screen
update of the bargraph.
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Press LOCK to advance to “ Calibration ON/OFF” or exit extended
calibration as described below.
Quitting Extended Calibration
You can quit extended calibration and return to normal operation in one of
two ways:
Quitting without Saving
To quit extended calibration without saving, simply press
momentarily.
Quitting and Saving
To quit extended calibration and save any changes made to the extended
calibration features, simply press and hold and LOCK together for 2
seconds.
3.4 Master and Repeater Modes
As described in the installation chapter, the ST30 Compass can be used
as a master or repeater instrument. The selection of these modes is
performed automatically with no input required from the user.
ST30 Compass Installation and Operation Handbook
24
3.5 Software Version
During the key sequence to advance to extended calibration, the software
version is displayed. This can also be accessed by pressing
for 4 seconds.
and LOCK
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The compass will return to normal operation after 8 seconds.
Chapter 4: Operation
25
Chapter 4: Operation
4.1 General
This chapter describes the operational features of the ST30 Compass
using sample displays and text references.
Points to remember...
All key presses are confirmed by a single beep. This audible confirmation
cannot be turned off.
The ST30 Compass cannot receive or transmit NMEA data directly.
If linearisation has not been carried out, the small CAL legend flashes for 1
minute every time the ST30 Compass is powered up. The accuracy of the
heading display cannot be guaranteed until linearisation has been
completed.
4.2 Heading Mode
This is the default mode of operation and is always displayed in degrees
magnetic. North, relative to your compass heading, is displayed as a
graphic to the left of the heading.
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ST30 Compass Installation and Operation Handbook
26
4.3 Lock Mode
This mode allows you to lock onto a heading and then steer your vessel
using the off-course bargraph to maintain the locked heading, which is
stored as the datum as soon as you engage lock mode.
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The off-course bargraph consists of 5 port and 5 starboard segments plus
the arrow head, which indicates a course error of 2°. The 5 segments
indicate course errors of 4°, 7°, 11°, 16°, and 22°.
Auto Lock
If AUTO is engaged from an Autohelm autopilot, the pilot will override the
ST30 compass locked heading. The small “AUTO” legend is displayed
during this mode to indicate that AUTOLOCK has been engaged.
Reciprocal Locked Heading
If your course error exceeds +/-- 110° the compass automatically selects
the reciprocal locked heading.
Please note...
If the ST30 Compass is being used with an autopilot, the reciprocal
heading feature is disabled.
Chapter 4: Operation
27
Adjusting the Locked Heading
The locked heading can be adjusted at any time by simply pressing the
and key to increase or decrease the displayed heading.
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Lock Mode Heading Error
When you exit lock mode, the average heading error during lock mode
operation is displayed for 8 seconds.
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ST30 Compass Installation and Operation Handbook
28
4.3 Average Heading
The compass continuously calculates the average course steered. This is
independent of whether the compass is in Lock mode.
To display the average course, simply press
momentarily.
and together
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The average course is displayed for 8 seconds at which time the display
reverts to the lock display.
Resetting the Average Heading
With the average heading displayed, simply press and hold
and
together for 3 full seconds to reset the average (the compass beeps
once to indicate that the average heading is being reset).
Please note...
After 24 hours of continuous operation, the compass will stop calculating
the average heading and the display will flash.
Chapter 4: Operation
29
4.4 LCD Illumination
The ST30 Compass has four illumination settings: high (L3), medium (L2),
low (L1), and off (L0). The LCD is illuminated by simply pressing the
key. This key is also used to cycle the illumination settings.
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If the ST30 Compass is on the SeaTalk bus, the illumination can be
adjusted from any instrument. Likewise if the illumination is adjusted from
the compass the illumination of all the instruments on the bus will be
altered.
Please Note...
The compass returns to normal operation 8 seconds after the last
key press
4.5 No Data
If the compass fails to receive compass information, or if the transducer is
not connected when the compass is the sole compass unit on the bus, the
display will consist of just dashes.
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ST30 Compass Installation and Operation Handbook
30
Chapter 5: Fault Isolation & Maintenance
31
Chapter 5: Fault Isolation & Maintenance
5.1 Fault Isolation
In the unlikely event that a fault occurs with your ST30 Compass, the
following table should help you identify the most likely cause and provides
the action required to correct a fault.
Fault
Cause
Action
Compass display is
blank.
No power supply
Check the cables are
plugged in and are
secure.
Check the fuse/ circuit
breaker.
Displayed heading is
different from the
ships compass.
Deviation present.
Carry out the compass
linearisation
procedure.
Ships compass is
incorrect.
If your boat has dual
steering compass
stations, make sure
that both compasses
are displaying the
same heading. If they
are not you should
swing the ships
compass.
The ST30 Compass
has not been aligned
to a known transit
bearing.
Perform the heading
alignment procedure
described in the
calibration chapter.
No exchange of
heading information
between SeaTalk
instruments.
SeaTalk cabling
problem.
Make sure that the
SeaTalk cables are
plugged in correctly.
ST30 Compass Installation and Operation Handbook
32
5.2 Maintenance
Certain atmospheric conditions may cause condensation to form on the
display head window. This will not harm the instrument and can be easily
cleared by switching the lights on to level 3 (L3).
Chemical and abrasive materials must not be used to clean the compass
instrument; if it is dirty, clean it with a soft, damp cloth.
Examine all cables for chafing or damage to the outer shield and, where
necessary, replace with genuine Autohelm cables and resecure.
Important note...
Only genuine Autohelm cables and spare parts must be used.
CAUTION:
Cables that cannot be replaced by simply plugging them into the
appropriate equipment must be replaced by authorised Auto-
helm service engineers.
Chapter 6: Specification
33
Chapter 6: Specification
Dimensions:
110w x 88h x 42d mm
(4.3w x 3.4h x 1.6d in)
Power supply:
10 to 16.5V (12V nominal)
Current consumption:
45ma (normal) 90ma (Illumination on)
Operating temperature range: 0 to 70°C
Illumination:
3 selectable levels
Repeater capability:
Software programmable
ST30 Compass Installation and Operation Handbook
34
Raytheon Marine Europe, Anchorage Park, Portsmouth
P03 5TD, England
Telephone (01705) 693611. Fax (01705) 694642
Raytheon Marine Europe, Anchorage Park, Portsmouth
P03 5TD, England
Telephone (01705) 693611. Fax (01705) 694642
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