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ST40 Wind
Instrument
Owner’s
Handbook
Document number: 81160_3
Date: 1st May 2001
160_3cov.p65 01/05/01, 16:141
ii ST40 Wind Instrument Owners Handbook
160_3pre.p65 01/05/01, 16:142
2 ST40 Wind Instrument Owners Handbook
NORMAL OPERATION
Apparent
wind
D4753-2
Note: The High wind speed alarm screen is available
only on master instruments. It is a temporary screen and
will time-out to the previous permanent screen
(Apparent wind or True wind) after 5 seconds.
Switch on
WIND
CAL
True wind
High wind
speed alarm
STEER
Locked apparent
wind
Auto locked
apparent
wind
Increase locked
wind angle
Decrease locked
wind angle
Course computer
enters vane lock
WINDST40
Increase
Decrease
3 seconds
Alarm
on/off
Set high wind
speed alarm
threshold
ST40
WINDST40
WINDST40
WINDST40
WINDST40
Course computer
enters vane lock
+
With Set high wind speed alarm
threshold screen displayed, press the
to save the alarm level and return to
normal operation.
and keys simultaneously
Momentary
If boat speed information
(from SeaTalk) is not present,
true wind information is not
available and this screen is displayed
160_3c01.p65 01/05/01, 16:152
4 ST40 Wind Instrument Owners Handbook
1.3 Screen descriptions
Apparent and true wind screens
If apparent wind information is displayed,
bearing as the locked heading
D4792-2
Wind direction with
respect to boat
heading. Either
apparent or true.
Wind angle
Either A (apparent)
or T (true)
Wind speed
Either apparent
or true, as indicated
above.
Boat heading
to apply the current wind
press
Locked apparent wind screen
D4793-2
Note:
In auto lock mode, a similar screen is displayed with an A LOCK
annunciator, to indicate that the locked wind angle is controlled
by the course computer and cannot be changed manually.
STEER
Relative direction
of the locked wind
angle
Flashing segment
indicates the
divergence of the
apparent wind from
the locked wind
angle
Locked wind
angle
Apparent wind
speed
P = port,
S = starboard.
Direction to steer
indicator to achieve
locked wind angle
Use or
to change locked wind angle, as required.
Press
to return to the Apparent wind screen
1.4 High wind speed alarm
The high wind speed alarm threshold is set up at the Set high wind
speed alarm threshold screen and the alarm sounds if the alarm is
switched on and the wind speed exceeds this threshold.
160_3c01.p65 01/05/01, 16:154
6 ST40 Wind Instrument Owners Handbook
160_3c01.p65 01/05/01, 16:156
Chapter 3: Installation
11
Chapter 3: Installation
This chapter describes how to install the ST40 Wind instrument, and
associated Rotavecta wind transducer.
3.1 Planning your installation
Determine the best positions for both transducer and instrument, such
that the EMC installation guidelines and the Site Requirements (below)
are satisfied.
EMC installation guidelines
All Raymarine equipment and accessories are designed to the best
industry standards for use in the leisure marine environment.
Their design and manufacture conform to the appropriate
Electromagnetic Compatibility (EMC) standards, but correct
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.
The guidelines given here describe the conditions for optimum EMC
performance, but it is recognised that it may not be possible to meet all
of these conditions in all situations. To ensure the best possible
conditions for EMC performance within the constraints imposed by
any location, always ensure the maximum separation possible between
different items of electrical equipment.
For optimum EMC performance, it is recommended that wherever
possible:
All Raymarine equipment and cables connected to it are:
At least 1 m (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 2 m
(7 ft).
More than 2 m (7 ft) from the path of a radar beam. A radar
beam can normally be assumed to spread 20 degrees
above and
below the radiating element.
160_3c03 .p65 01/05/01, 16:1511
Chapter 3: Installation
13
57 mm
(2.25 in)
D4643-3
4 mm
(
5
/
32
inch)
2.5 mm
(
1
/
10
inch)
Note: If you intend fitting a nonstandard transducer, extra tools may
be required
Site requirements
Rotavecta wind transducer
The Rotavecta wind transducer can be either mounted on a flat surface
or clamped to a horizontal rail. Suitable rail diameters are from 23 mm
(
29
/
32
inch) to 25 mm (1 inch).
The Rotavecta must be fitted:
As high as possible and away from any equipment which may
shield the transducer or otherwise disturb the air flow.
In a position which allows reasonable access for installation and
servicing.
Instrument
D4644-2
Instrument dimensions
126 mm (5.0 in)
21 mm
(0.8 in)
17 mm
(0.67 in)
55 mm
(2.2 in)
70 mm
(2.8 in)
30 mm (1.2 in)
minimum cable clearance
ST40
160_3c03 .p65 01/05/01, 16:1513
14 ST40 Wind Instrument Owners Handbook
CAUTION:
The presence of moisture at the rear of the instrument could cause
damage either by entering the instrument through the breathing
hole or by coming into contact with the electrical connectors.
Each instrument must be positioned where:
It is easily read by the helmsman or navigator
It is protected against physical damage
It is at least 230 mm (9 in) from a compass
It is at least 500 mm (20 in) from radio receiving equipment
There is reasonable rear access for installation and servicing
The rear of the instrument is protected from water.
3.2 Procedures
Adapt these procedures as appropriate, to suit your individual
requirement.
CAUTION:
Where it is necessary to cut holes (e.g. for cable routing and
instrument mounting), ensure that these will not cause a hazard by
weakening critical parts of the vessel’s structure. If in doubt, seek
advice from a reputable boat builder.
Fitting Rotavecta transducer
On rail
Rotavecta mounting options
On flat surface
D4833-1
160_3c03 .p65 01/05/01, 16:1514
18 ST40 Wind Instrument Owners Handbook
SeaTalk connections
CAUTION
When instruments are connected to SeaTalk, ensure that the
power supply for the SeaTalk 12 V line is protected by a 5 A fuse
or circuit breaker.
5 A circuit breaker
Red (+ve)
12 V dc supply
(e.g. course
computer
or battery)
Uninsulated wire
(screen) -ve
D4826-2
Typical SeaTalk connections
SeaTalk bus
SeaTalk bus
SeaTalk interface
kit
Power cable
Note:
A 5 A fuse can be used in place of
the circuit breaker, if preferred.
Fitting the instrument
Fit your ST40 instrument as shown in the following illustrations.
1
D4759-1
Cutting centre
TO
P
Cut out
shaded area only
Cut out hole
57 m
m
(2.25 in)
diam
eter
ST40 Instru
m
ent Tem
plate
Remove template from handbook (immediately after index), apply to required location
and mark cutting centre.
160_3c03 .p65 01/05/01, 16:1518
20 ST40 Wind Instrument Owners Handbook
D4819-1
5
Screw stud into instrument
D4818-1
6
Feed cables through clamping bracket,
connect cables then secure instrument with
bracket and thumb nut
Desktop Mounting Bracket
An optional Desktop Mounting Bracket (Part No. E25024) enables you
to mount your ST40 instrument in locations where other forms of
mounting are impractical.
160_3c03 .p65 01/05/01, 16:1620
Chapter 4: Calibration
23
Chapter 4: Calibration
4.1 Introduction
The procedures in this Chapter must be carried out before the
equipment is used operationally, to optimise the performance of the
instrument with the vessel.
Calibration information is presented in flow chart form. The flow charts
show the various calibration screens and key presses necessary to carry
out calibration. All key presses are momentary unless otherwise stated.
EMC conformance
Always check the installation before going to sea to make sure that it
is not affected by radio transmissions, engine starting etc.
4.2 User calibration
User calibration enables you to:
Set the wind angle and speed response values. Use higher response
values for rapid updates in reasonable weather conditions (for
example, when you are trying to maintain a locked course). Use
lower response values in squally conditions to damp out unstable
readings.
Set the required wind speed units, either KTS (knots) or M/S (metres
per second).
Linearise and align the wind transducer.
Power up the instrument then follow the procedure in the User
calibration flow diagram.
160_3c04.p65 01/05/01, 16:1623
32


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