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' Autohelm Raymarine: St50 Speed St50 Wind Speed'




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Any reference to Raytheon or
RTN in this manual should be
interpreted as names Raytheon and RTN
are owned by the
Raytheon Company
ST50 SPEED
Installation and Nautech Limited Anchorage Park Portsmouth
Hampshire PO3 5TD England
Telephone 0705 693611 Telex 86364 NAUTEC 2
2 Control Head Installation 3
21 Siting 3
22 Mounting Procedure 3
23 Power Supply 4
24 Connection to Adjacent Instruments 4
25 Connection to Separated Instruments 4
26 Ring Connection 5
27 Connection to SeaTalk Compatible
Autopilots 5
3 Transducer installation 6
31 Connection to Transducer Selection
33 Transducer Installation 6
4 Fault Finding 8
5 Control Head
52 Through Hull Cabling
6 Operation 10
61 Set Up 10
611 Measurement Units 10
612 Display Contrast Adjustment 11
62 Illumination 11
63 Display Sequence SPEED 12
64 Display Sequence TRIP 12
65 Display Sequence TIMER 13
7 Log Calibration 14
71 Manual Calibration 14
72 Automatic Calibration 15
1 2 Control Head ST50 Speed can be used as a standalone
39mm Note Tlie back cover is designed to breath
0 Power Supply 1 lhtn 433111 15in through a duct in the cable boss to or when connected
to the SeaTalk
1
can supply information to a Multi Function 11V to 16V DC at 50ma illumination off 24mm
moisture a Tridata Repeater or any SeaTalk l Operating Autohelm Autopilot 0C to t70c
22 Mounting Procedure Fig 1
Both the Multi Function Display and Tridata 0 Size 1lOmm 433in x 1lOmm 433in x The
mounting surface must be smooth and have an NMEA standard output 24mm lin Overall depth 39mm 15in
0 Use the template provided to mark the
providing speed information to other onboard 0 Computer
centres of the two fixing holes and equipment 8 bit Intel t 8K Rom
boss
The timer functions operate independantly 0 Display
Note Adjacent units should have a 6mm boat speed and log information to be Custom dot matrix7 segment liquid
separation to allow room for the whilst the timer is running crystal display LCD
covers
l Boat Speed 0 Drill to 4mm 5132in It is not possible to use
the ST50 Speed as 0 to 60 knots depending on transducer 21 Siting 0 Use a 50mm 2in diameter cutter to
drill the
a repeater unit without a transducer input 0 Average Speed The ST50 speed instrument is designed for
hole for the central boss 1
When a dedicated repeater is required use 0 to 60 knots above or below deck installation 0
Screw the two fixing studs 2 into the back
the ST50 Multi Function Display l Maximum Speed Position where it is
cover
0 to 60 knots user resettable Resets on 0 Easy to read by the helmsman l Pass the cable tails through the central hole
powerdown 0 Reasonably well protected from physical and secure the instrument with the thumb
Log damage nuts provided 3 A sealing gasket 4 is already
0 to 99999nm promenantly stored 0 At least 230mm gin from a compass attached to the back cover
0 Trip Log 0 At least 500mm 20in from radio receiving
0 to 999nm user resettable Resets on equipment Bracket Mounting Fig 2
powerdown 0 Accessable from behind to secure in place As an alternative to surface mounting a bracket
0 Sea Temperature and run cables mounting kit Cat No 9130 is available to allow
10C to 40C 14 to 104F 0 Normally viewed straight on for best display the Instruments to be bracket mounted
l Timer legability
0 to 100 hours countup
10 minute countdown
5 minute countdown
0 Illumination
3 levels and OFF user selectable
0 Unit Selection
Speed in MPH or knots user selectable
Distance in NM or statute miles user
selectable
0 Distance Lost Function
Indicates distance lost during a Tack in
either feet or metres
3 Power Supply Fig 3 24 Connection to Adjacent Fig 5
26 Ring Connection
lnstruments Fig 4 insrarrarrons with a iarge number ot tnstruments
I 0 I ransducer
Fig 4 To Transduce1 To Transducer Cat No 0131 on the SeaTalk bus may require a second ring
cz1 9m 3011 supplied main connection to the Power Supply to avoid
excessive voltage drops This can be checked
using the table below
Ra lalk Tails SeaTalk Tails
The second connection should be made to the
All instruments receive both power and spare lead on the last instrument and led
back
information from the SeaTalk bus Each to the circuit breaker
instrument has two SeaTalk connectors 3 pm
on short 15Omm in tails to allow adjacent
units to simply plug together
27 Connection to SeaTalk
Compatible Autopilots Fig 6
Power y ce 25 Connection to Separated
If the vessels installation includes a SeaTalk
Compatible Autopilot the ST50 instruments may
2m 6ft htruments Fig 5
be connected into the SeaTalk bus at any point
Red s12v Separated instruments are connected using the
No separate connection to the 12V power supply
Screen ov SeaTalk Extension Cable Cat No 0131 This is Scre
is necessary as the instruments will receive
supplied with a SeaTalk connector fitted to each power via the bus from the autopilot course
end and with a junction box to rejoin the cable if computer
Jest installations only require one connection to it is cut to ease routing or for shortening
he 12V power supply If preferred any 2 core screen cable which
This is connected to the first SeaTalk has the following specification may be used in
nstrument using the 2 metre cable supplied the place of the SeaTalk cable
Plug the connector into the instrument and
ead the other end back to the vessels
Minimum Copper Area AWG
listribution panel Cut the cable to length
onnect directly to the distribution panel and Screen 05mm 22
jrotect with a 5A circuit breaker Connect the 2 Cores 05mm2 22
ed wire to t 12V and the screen to OV The Computer BUS
ellow wire should be cut back and insulated
Longer runs to the power supply can be made
rsing the SeaTalk Extension Cable Cat No
1131 which is 9m 3Oft long
To any fher
ST50 Instruments
or Autopilot
Control Units
3 Transducer Connection to instrument 33 Transducer Installation Installation
Fig 9
cl PTCn CA L A
Ucl113Llx
MSCJ A
tww L
LIC 1113LI LLllIzi IAL
3Jpllt Wllll n q d111111
I 111 3mt o tJllL
Ill La IIlC
LI 111
LIK 11J
tail with connector Each transducer is the transducer completely before proceeding position and check both
inside and out that
supplied with 14m 45ft of cable and the with the installation the siting is fitted on
the end simply plugs into the Installation of the through hull type is l Use a 50mm 2in diameter cutter to drill
cable tail Fig 7 described below hole from the outside
l Emery to remove burrs and roughen the
Siting Fig 8 surface to provide a good key Clean inside
and outside the hull removing any grease
Fig 8
with a weak solvent cleaner or household
Sailing Yacht
detergent
D
Semi
43 Speed
Planing 4 Hole Size c
50mm 2in Dia
SPEED 2095 and Transducer
q l Remove the paddlewheel assembly and nut
from the through hull fitting 2 and apply
32 Transducer Selection sealing compound 3 to
the mating flange and
up the thread 6mm 114in greater than the
The speed transducers are selected depending
For accurate readings the transducer should be hull thickness
on the hull material
positioned within the shaded area indicated l Assemble the through hull fitting making sure
where it will be in clear flow that the arrow points forward Do not
0 Be ahead of propellors 10 WL length overtighten the nut 1
min l Remove excess sealing compound
l Be at least 150mm 6in from the keel in a 0 Insert blanking plug ready for launch
sailing yacht ideally ahead of the keel l Check for leaks immediately the vessel is
l Be near the centreline launched Recheck within 8 to 24 hours
l Be clear of other through hull fittings or
projections Cabling
l Have sufficient clearance inside the hull to 0 Route the cable back to the instrument
allow the nut to be fitted 0 Avoid running the cable close to flourescent
l Have 1OOmm 4in headroom above the lights engine radio transmitting equipment
through hull fitting to allow it to be etc as these may cause
withdrawn 0 Keep the cable clear of the bilges and secure
at regular
7
4 Fault Finding 5 Autohelm products are subject
to a 51 Control Head 53 tact
I nrwnrm
y nrinr
rA tn
1 narkino
a In Ll
I 4 Ar Lcllll
LIIILIIIJ cNIlGl1XUII
CIJ I
AA lnl Kl
shipment In the unlikely event that a fault appear on the window This will not
harm the possible and secure any coiled lengths at
does arise the following check list should help instrument and can be cleared
by switching regular the problem on
the illumination to the brightest level 0 Avoid running cables close to flourescent
0 Never use any chemical or abrasive materials lights engine radio transmitting Course
Action to clean your ST50 Speed Instrument If the etc
instrument becomes dirty wipe clean with a l Check cabling for chafing or damage to Display Blank No Supply
Check Supply
damp cloth casing replace where necessary and
Check Cabling and security of SeaTalk
resecure
Connectors
Check FuseBreaker
52 Through Hull Transducers
0 Periodically check the throughhull fitting for Advice
Return ST50 Speed for repair Should any difficulties arise please consult
leaks
No Speed or Temperature Information Transducer Cabling Problem Check Cabling and security of 0 Keep the Orings of the SpeedLog
transducer Nautech Product Support Department in the
Transducer Connector and plug well covered with Vaseline ensuring UK or your own National Distributor who will
No Speed Information Transducer Paddle Wheel Clean Paddle Wheel plug is always attached to
transducer ready be able to provide expert assistance
fouled for immediate use
No exchage of information between SeaTalk Cabling Problem Check security01 SeaTalk Connectors 0 Always replace the SpeedLog
Instruments ie illumination Remove Instruments one by one to with the plug whenever the vessel is
isolate faulty unit hauled out or left for long periods
0 Frequently check SpeedLog transducer for
Failure of a groupof Instruments in SeaTalk Check security of SeaTalk Connectors
fouling or damage
the SeaTalk Chain problem between functioning and non
functioning Instruments
0 Clean the outside of the through hull fitting
flange or external transducer face with a stiff
brush and protect with a single coat of anti
fouling Clean the paddlewheel and exposed
end of SpeedLog transducer plug and apply
single coat of Operation
he ST50 Speed Instrument can be used as an 61 Set Up
62 mrAln
IIIWIG n
I WllllGLlci nLr
LLIlcil ihe Si30 Speeci is sei up ill iile iaciory io Control of
Illumination level is common to to provide part of a fully integrated display speed in knots distance in NM and
ST50 Instrument Modules The control is system which can be linked to distance lost in feet
These can be changed to selected using the lefthand push button
ny of the Autohelm SeaTalk compatible mph statute miles and metres to suit your
0 Push and hold down the Speed button for 1
utopilots preference as follows
second to switch ON if OFF or to display
l Push and hold down for 2 seconds Speed and 0 Push Reset to change display units between current illumination
level if already on
Trip together to select calibration mode feet and metres
l Push and hold down for 2 seconds Speed and
Trip together toexit calibration mode and
store the selected units
nulaheln SPEED 612 Display Contrast Adjustment
l The LCD viewing angle can be user set to
achieve optimum display legability
0 L
TRIP
l Momentarily push Speed and Trip together
611 Measurement Units 0 Push Speed button within
8 seconds to select
required illumination level
Lamp 3 High
Lamp 2 Medium
Lamp 1 Low
Push Reset to change display units between
I l Push Reset to increase and Timer to decrease
the contrast level
0 Adjust for optimum contrast
LampOFF O f f
The display will return to previous status after
knotsand mph 0 Momentarily push Speed and Trip together to 8 seconds
ntP store the display setting
Note Increasing the display setting will suit
Ll installations where the instrument is normally
viewed from below
Decrease
l i
1 i I i
y
j7 Kast
l Push Reset to change display units between
nautical miles and statute miles
TRIP
i 1
Level
0
11
63 Display Sequence SPEED l Tack
65 Display Sequence TIMER
i fIi i i I
IPCCD
n J
When in Tack mode the ST50 speed instrument l Timer
l Boat Speed l Trip Distance gives a measure
of lost distance during a tack
based on the average speed over the last 30 i j j j c i i
j j jj
j 1 seconds Push Reset just before starting the
I i a
tack to start the distance lost function 17 17
RtSlr Lrr r
Push Reset for 4 seconds to reset I 1 Push
Timer to startstop
TRIP i ip 3 ji Push Timer to freeze display indicated by
I
is i
y flashing colon
l Velocity Made Good II I
ie 1 1 jj i j II
0 Log l
Race Timer
jl y il f I p
I L
1 1 I
j J 1
a Tack the boat
The distance lost will now count up until
the boat reaches its average speed on the
only displayed if wind data available previous tack
l Average Boat Speed
0 Push Reset to reset the function ready for the Push Timer for 1 second to select 10
l Sea Temperature next tack
minute countdown
ii 1 1 j
jj Lj j
Push Timer for 3 seconds to select 5
Note The tack function should be reset at least minute countdown
B 87 30 seconds before tacking so that the average
a3 speed can be accurately calculated
0 Push Reset at anytime to reset
I
Push Reset to reset
Average speed is calculated over a max
24 hour period after reset and then flashes
I
j j j j j
I I L
l Maximum Speed
ILt rl
j j j j
p j
Note If timer is already running use Timer to
7 4
return to timer display
Push Reset to reset
Display returns to current boat speed after
8 seconds
12
13
2 Log supplied all ST50 Instrument Modules are 71 Manual Calibration Procedure 72 Automatic
Calibration l At the start of the measured run push Speed
Tested and Calibrated to factory standards It is l Calculate Correction FactorF Procedure
Display shows run number and I that
hafnrn 1tcino
D thic inctrlmxd fnr I A distance
WV I
F 6 Seieci an easiiy ideniiiied marked measureci purposes the following Log
distance on a procedures are carried out for your
Measured distance
Known distance 0 Carry out the calibration when tidal flow is I 1
specific installation least
There are two methods of log calibration From a chart
Measured distance 0 Complete a minimum of two runs one in each
0 Manual Calibration allows a calculated log direction to cancel tide
As recorded on speed instrument allowing
calibration factor to be entered manually
0 Automatic Calibration allows up to four for tidal flow as required
Procedure
measured runs to be entered and compared Procedure Push and hold down for 2
seconds Speed and
against a known distance The log calibration
factor is automatically calculated
l Push and hold down for 2 seconds Speed and Trip together to select calibration mode
SPIED
Trip together to select calibration mode
ii i
rl i l Push Speed at the end of the run
Display shows recorded distance for the
L I run and after 5 seconds the log
WEID calibration factor
l Push Speed to select log calibration
0 Push Speed to display log calibration factor
0 Calculate the new log Calibration Factor
Displayed calibration factor x F min 025 0 Push Speed to display distance
max 150
l Repeat last two stages to run the measured
distance in the opposite direction
0 If required repeat last two stages for up to 2
more calibration runs over the measured
0 Adjust the displayed calibration factor using
L I
distance
Reset to increase A or Timer to decrease T 0 Push and hold down for 2 seconds Speed and
l Push and hold down for 2 seconds Speed and Trip together to exit calibration and to
store
Trip together to exit calibration and to store the new log calibration factor
new calibration factor Note If the calibration factor is not within 025
0 Adjust displayed distance using Reset to and 150 a mistake has been made in the
increase A and Timer to decrease 7 calibration sequence and the previous
until it equals marked measured distance calibration factor will be retained when exiting
minimum 025nm maximum 250nm calibration mode
The trip distance will be lost whenever
automatic calibration is used
14
15

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