NKE TL25 User manual

nke – marine electronics
Z.I. Kerandré – Rue Gutenberg – 56700 HENNEBONT- FRANCE
http://www.nke.fr – After sale service n°0 892 680 656.
Multifunction
TL25
and its remote control
Product reference : 90-60-244 white / 90-60-256 black
USER GUIDE
and
INSTALLATION GUIDE
REV : 1

- 2 – TL25 User guide–- 33-60-021-000
TABLE OF CONTENT
1 USING...................................................................................................................................3
1.1 P RESENTATION .....................................................................................................................3
1.2 L IST OF CHANNELS CREATED .................................................................................................5
1.3 K EYPAD FUNCTIONS OF THE REMOTE CONTROL .......................................................................6
1.4 C HANNEL SELECTION ............................................................................................................6
1.5 W HAT IS A SUB - CHANNEL ......................................................................................................7
1.6 A LARMES SETTING ................................................................................................................8
1.7 F ILTERING OF THE CHANNELS ...............................................................................................10
1.8 L IGHTING SETTING ..............................................................................................................11
1.9 U NITS .................................................................................................................................12
1.10 Z ERO SETTING OF THE DAILY LOG ......................................................................................13
1.11 C HOICE OF LANGUAGES ...................................................................................................14
1.12 U SE OF THE CHRONOMETER .............................................................................................15
1.13 NMEA LINK ....................................................................................................................16
1.14 T ECHNICAL SPECIFICATIONS .............................................................................................18
1.15 V ERSION AND ADDRESS NUMBER OF THE DISPLAY ..............................................................18
1.16 D IAGNOSTIC FOR 1
ST
LEVEL TROUBLESHOOTING .................................................................18
1.17 TL25 INITIALISATION : SEE CHAPTER 4.8............................................................................18
2 SENSOR CALIBRATION....................................................................................................19
2.1 S ETTING PROCEDURE OF THE CALIBRATION COEFFICIENT :......................................................19
2.2 O FFSET SETTING PROCEDURE .............................................................................................19
2.3 A UTOCOMPENSATION OF THE FLUXGATE COMPASS ................................................................20
3 INSTALLATION ..................................................................................................................21
3.1 P ACKING LIST :...................................................................................................................21
3.2 L IST OF ACCESSORIES .........................................................................................................21
3.3 I NSTALLATION PRECAUTIONS ................................................................................................21
3.4 M OUNTING ON MAST FOOT SUPPORT ....................................................................................22
3.5 W ALL MOUNTING ................................................................................................................23
3.6 C ONNECTION TO THE T OPLINE BUS AND TO THE NMEA BUS OF THE INSTALLATION ...................24
3.7 I DENTIFICATION OF THE CABLE WIRES ...................................................................................24
3.8 TL25 AND REMOTE CONTROL INITIALIZATION .........................................................................25

- 3 – TL25 User guide–- 33-60-021-000
1 USING
1.1 Presentation
The Multifunction TL25 is a display from the TOPLINE range. Its three screens, with high
definition LCD technology, offer excellent readability and a wide angle of view of the data
displayed, whether by daylight or at night. It is connected to the TOPLINE bus of your
installation and displays all the channels available on the bus.
The TL25 is controlled using either a cable remote control or a radio remote control (not
included with the product).
Chanel name
Data value
Unit
Alarm signal

- 4 – TL25 User guide–- 33-60-021-000
Architecture of the installation
The presence of the equipment in the following diagram is for information only, and does not
represent the equipment of your installation.
Cable TOPLINE
20-61-001
GND
DATA black
12VDC white
Figure 1
log depth interface
90-60-450
log
speedomètre depth
connecting box
90-60-417
NMEA -
NMEA +
input NMEA
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105-
KNOTS
DEGRES
10.50
DEPTH
METERS

- 5 – TL25 User guide–- 33-60-021-000
1.2 List of channels created
The master display, whether it is the TL25 or any other TOPLINE display, and each TOPLINE
sensor, automatically create their respective channels when they are connected to the
TOPLINE bus.
Channels created
by the
TL25
when set as
master display
Channel designation
Magnetic heading
Apparent wind angle
Apparent wind speed
Depth
Boat speed
Maximum and average speed
Distance and bearing to man over
board
Configuration
Bus voltage
VMG
CMG
True wind speed
True wind angle
True wind direction
Corrected heading
Estimated distance
Estimated angle
Total log
Tip log
NMEA Performance
channels displayed
Target speed
Heading on other side
Optimum wind angle
NMEA channels
displayed
Optimum VMG angle
Optimum CMG angle
Efficiency at close-haul
Polar efficiency
Speed over Ground and Course over
ground
Cross-track error
Please note that the channels MAX SPD and AVERAGE SPD can be accessed when the TL25 is
master. In this case, these channels are displayed alternatively on one single screen. By default, this
channel is calculated using the surface speed, and in the absence of the latter it will be calculated using
the bottom speed. These average and maximum values are calculated from the last power-up of your
installation. You can reset these channels to zero, without switching off the bus : select the channel
MAX SPD and AVERAGE SPD then press the key for 2 seconds.

- 6 – TL25 User guide–- 33-60-021-000
1.3 Keypad functions of the remote control
-key
Press this key to select one of the three display screens of the TL25. The selected screen
flickers.
-Low key and High key
These keys allow to select a different channel to the one already displayed. They also allow to
increment or decrement a data which is in the process of being modified.
-key
The remote control also enables you to control the other displays of your TOPLINE installation,
the address of which is lower than the address of the remote control. Press this key to select
the TOPLINE display, which you wish to operate.
-
Ent
key
This key allows to access the sub-channels and to validate the settings you implement. Brief
pressure on this key also allows to set the level of lighting.
-
Mob
Man Over Board key
Press this key for 5 seconds, and the function «Man Over Board» is activated. When a
speedometer and a compass are connected to the TOPLINE bus, the displays then
automatically indicate the estimated heading and distance to reach the man over board. If your
installation only comprises a speedometer, then only the estimated distance will be displayed.
To disable the «Man Over Board» alarm, you must cut off the power supply of your TOPLINE
installation.
CAUTION : the calculation of the estimate, for the Man Over Board function, does not take into
account the drift of the boat caused by the current and the wind.
For more detailed information, please refer to the remote control user guide.
1.4 Channel selection
The three screens of the TL25 are independent. Using the remote control, configure the display
according to your requirements. Examples of configuration:
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105-
KNOTS
DEGREES
10.50
DEPTH
METRES
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105
274°
COMPAS HEAD
NOEUDS
DEGREES
DEGREES

- 7 – TL25 User guide–- 33-60-021-000
1.4.1 Procedure
1.4.2 List of channels displayed
The master display, whether it is the TL25 or any other TOPLINE display, and each TOPLINE
sensor, automatically create their respective channels when they are connected to the
TOPLINE bus. You will find the list of created channels in annex 1.
1.5 What is a sub-channel
The sub-channels are made to modify setting and display parameters of the channels. For
example, the sub-channels of the surface speed channel are:
-offset and calibration coefficient : setting parameters of the log-speedometer sensor,
-the measurement unit : in knots or in km/hr,
-filter setting,
-high alarm and low alarm setting.
The same applies to all channels present on the TOPLINE bus. The following chapters provide
detailed explanations on how to access the sub-channels and implement the settings.
CAUTION : if your installation is equipped with several TOPLINE displays, make sure that
the remote control controls the display which you wish to operate. Press the key
repeatedly, until the intended display blinks.
1
Using the key
from wich you wish to change the channel.
2
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105
274°
COMPAS HEAD
NOEUDS
DEGREES
DEGREES
, select the row
Figure 2
TL 25
DEPTH
The new display is save in memory
select in the list,
50.20
METRES
the channel you wish to display.
The selected row flikers.
Using the key

- 8 – TL25 User guide–- 33-60-021-000
1.6 Alarms setting
The setting of an alarm enables you to monitor the value of a channel. When the preset
threshold is exceeded, a warning message is displayed and an audible alarm is activated. For
example, you can set an upper threshold and a lower threshold on the surface speed channel.
High alarm is activated when the display is higher than the programmed threshold.
Low alarm is activated when the display is lower than the programmed threshold.
To cancel the alarm of a channel, enter the value 0in the upper alarm and the lower alarm.
Thus, the setting of the alarms will allow you to supervise your TOPLINE installation effectively
as well as the good operation of your boat.
Note that for angular channels such as magnetic heading or wind angle, the sub-channels of
alarms are the alarm base and the alarm range.
1.6.1 Setting procedure
CAUTION : if your installation is equipped with several TOPLINE displays, make sure that
the remote control controls the display which you wish to operate. Press the key
repeatedly, until the intended display flickers.
Ent
Ent
1
2
Press and hold the key
until the sub-channel ALARM appears. Release the key.
4
to select the sub-channel LOW ALARM ou HIGH ALARM
TL 25
16.85
BOAT SPEED
KNOTS
HIGH ALARM
Figure 3
0
Then successively press the key
TL 25
HIGH ALARM
5
The new value is saved in memory
Validate and exite the alarm menu by maintaining pressure on
Ent
TL 25
LOW ALARME
20
Using the keys set the new alarm value "
20"
0.25
3
Using the key , select the channel
The selected row flikers.
from wich you wish to set an alarm.
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105-
KNOTS
DEGRES
10.50
DEPTH
METRES

- 9 – TL25 User guide–- 33-60-021-000
1.6.2 Alarms activation procedure
After having set the alarms, you can activate or disable all the alarms. When alarms are
activated, the alarm symbol below appears at the bottom left of the display :
Ent
1
Using the keys
select the channel CONFIG
2
Press and hold the key
3
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105-
274°
COMP HEAD
KNOTS
DEGREES
DEGREES
VALID ALARME
Figure 4
TL 25
CONFIG
Ent
Using the keys
until the sub-channel valid alarme appears. Release.
select YES
Validate by maintaining pressure on the key
NO
YES
After 5 s, the TL25 automatically exits the setting mode

- 10 – TL25 User guide–- 33-60-021-000
1.7 Filtering of the channels
The level of filtering of a channel determines the frequency of update of the data displayed.
For example, in rough sea when the boat moves significantly, it is useful to increase the filtering
of the speed channel to stabilise the value displayed. Conversely, in calm sea, low filtering will
be preferable to obtain a fast response of the display.
Filtering is adjustable between 1and 32, and the default value is 8. The lower this value is, the
higher the frequency of update is.
Filter setting procedure
Ent
Ent
1
Using the key
select the channel you need to change the filtering.
2
Presse and hold the key
until high ALARM appears. Release.
3
4
to select the sub-channel FILTERING
TL 25
16.85
BOAT SPEED
TL 25
FILTERING
Figure 5
8
Then successively press the key
TL 25
HIGH ALARM
5
The new filtering value is saved in memory
Validate and exits the menu by maintaining a pressure un key
Ent
TL 25
FILTERING
10
Using the key set the new filtering value 10
0.25
The selected channel flickers
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105-
274°
COMP HEAD
KNOTS
DEGREES
DEGREES

- 11 – TL25 User guide–- 33-60-021-000
1.8 Lighting setting
The TL25, as well as the other displays of the TOPLINE range, have five levels of backlighting :
0 = no lighting, 1 corresponds to the minimum level of lighting and 4 to the maximum level.
You have the option to set the level of lighting, either on the TL25 only, or on every TOPLINE
display of your installation :
1.8.1 TL25 setting procedure
1.8.2 Setting procedure for every display of your installation
Follow the above procedure, then press on the
Ent
key to apply the setting to every display.
Ent
1
Press the key
2
of the remote control
nke
TL 25
1
REGL NIVEAU
VENT ANG/A
105
274°
CAP MAGN
LIMI7RE
DEGRES
DEGRES
Using the key set the lighting level from
0 to 4
After 5 second the TL25 exit automatically this menu.
The lighting level is saved un memory
Figure 6
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105
274°
COMPAS HEAD
NOEUDS
DEGREES
DEGREES

- 12 – TL25 User guide–- 33-60-021-000
1.9 Units
You have the option to choose the display units of the channels:
-in knots or in km/hr for the log/speedometer,
-in knots or m/s for the anemometer,
-in degree Fahrenheit or in degree Celsius for the temperature
-in meters or in feet for the sounder
Unit setting procedure
Ent
1
Using the key
select the channel for which you wish to change the unit
2
Press and hold the key
until the sub-channel UNIT appears. Release.
3
4
The new unit is saved to the memory. In approximataly 5 or 6
seconds, display will revert to value.
Using the keys select the UNIT
TL 25
16.85
BOAT SPEED
KNOTS
TL 25
UNIT
KM/H
TL 25
31.20
BOAT SPEED
km/h
Figure 7
Validate and exit the setting by maintaining the pressure on
Ent
The selected channel flickers
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105
274°
COMPAS HEAD
NOEUDS
DEGREES
DEGREES

- 13 – TL25 User guide–- 33-60-021-000
1.10 Zero setting of the daily log
The channels daily log and total log are at your disposal on your display.
You will use the daily log to count the number of nautical miles completed during a sailing leg.
The value is kept in memory when the power supply of your installation is cut off. Resetting the
daily log channel to zero will allow you to count the number of nautical miles of the following
sailing leg.
The total log indicates the number of nautical miles completed since the installation of your
depth-finder log interface. Only a complete initialisation of your depth-finder log interface
allows to reset the total log to zero. It is performed by initialising the surface speed channel.
Zero setting procedure of the daily log
1
Using the key
sélect the channel trip log
2
Press the key
3
TL 25
TRIP LOG
Figure 9
0
TL 25
TRIP LOG
1805
MILES
and hold (approx
6 sec) to set " 0"
MILES
The trip log is set to " 0"
nke
TL 25
1805
TRIP LOG
APP WIND A
105
274°
COMPAS HEAD
MILES
DEGREES
DEGREES

- 14 – TL25 User guide–- 33-60-021-000
1.11 Choice of languages
You can configure the TL25 in one of these six available languages : French, English, Italian,
Spanish, German and Dutch.
1
Using the keys
select the channel CONFIG
2
3
LANGUAGE
Figure 10
TL 25
CONFIG
Press once more the key
until the sub-channel valid alarm appears. Release..
to select Language
NO
FRENCH
LANGUAGE
Ent
Using the keys select english (for example)
Valid by maintaining pressure on the Key
ENGLISH
Ent
After 5s, the TL25 automatically exits this menu
Press the key and hold
Ent
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105
274°
COMPAS HEAD
NOEUDS
DEGREES
DEGREES

- 15 – TL25 User guide–- 33-60-021-000
1.12 Use of the race timer
The display includes a regatta race timer. Times by default are T1= 6min and T2 = 4min.
1.12.1 Starting the race timer
During countdown, the last 5 seconds are signalled by a BEEP, then the START signal is given
by the alarm.
Note that if you did not start the race timer exactly at the start signal, you can synchronise the
countdown at T2 by pressing the Ent key. During the procedure, you can also return to the
initialization value by pressing the Ent key for 2 seconds. The race timer displays T1 = 6.00
minutes for a new start.
1.12.2 Setting of T1 and T2
This setting can only be performed on the master display of your installation.
−select the race timer channel, using the and keys,
−press
Ent
until the message T1 setting appears,
−change the value of T1 using the and keys, then confirm with
Ent
,
−the message T2 setting appears,
−change the value of T2 using the and arrow keys, then confirm with the
Ent
key ,
−after 5 seconds, the TL25 will automatically leave the setting mode.
Ent
Ent
1
Using the keys
select the channel racetimer
2
Press the key and hold
3
4
TL 25
Press the key
TL 25
RACETIMER
TL 25
00.00
min / sec
RACETIMER
06.00
min / sec
The racetimer is ready
to start the racetimer
RACETIMER
GO
MIN / SEC
Figure 11
until the display 06:00 appears
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105
274°
COMPAS HEAD
NOEUDS
DEGREES
DEGREES

- 16 – TL25 User guide–- 33-60-021-000
1.13 NMEA link
The TL25 includes an NMEA input, allowing the connection of a GPS, a PC, meteorological
sensors, etc. After performing the NMEA initialisation of the TL25, the NMEA channels
corresponding to the frames transmitted by the instrument are available on the TOPLINE bus.
You can then display data.
Please note that if an instrument transmits an NMEA frame which is already created by an nke
sensor, then this frame will not be taken into account.
1.13.1 Connection of the NMEA link
The NMEA input of the TL25 only allows the connection of one instrument providing NMEA
frames (see chapter 16). If you wish to connect a second instrument (for example a GPS and a
PC), you must connect it either to the NMEA input of another display, or to a TOPLINE NMEA
INPUT INTERFACE box (ref : 90-60-055).
1.13.2 NMEA initialisation procedure
−Select the CONFIG channel on the upper display,
−Press and hold the key until the message «INIT NMEA» appears. Release the key.
The TL25 subsequently performs a sequence of NMEA data search for 20 seconds, then it
creates the new channels corresponding to the NMEA frames transmitted by the instrument.
The NMEA channels created are saved in the display memory and restored every time it is
powered up.
1.13.3 Characteristics of NMEA data
The NMEA frames identified by the TL25 are in conformity with the NMEA standard 0183 V2.30
(or lower version).
The NMEA input is insulated by an optocoupler.
The format of the frames is : 4,800 bauds / 8 bits with bit 7 at 0 / 1 start bit and 1 stop bit.
Distances are truncated to the lower value.
The other dimensions are rounded to the nearest unit (ex : degrees for angles).
A frame can be partially empty between commas.
The TL25 will take the missing data in another frame (ex : speedometer in VWH and compass
in HDG).
The depth in feet will be identified if it does not exist in meters for example.
A channel can be included in several frames (ex : the compass is taken in HDG in priority, if not
in HDM, if not in VHW).
If the bottom heading or the WP heading do not exist in magnetic, the true heading is taken.
Refreshing of the display of the NMEA channels is performed each time a new valid NMEA
frame is received. If the NMEA link is lost (example : loss of satellites on the GPS) the last
received data will remain on the display for 64 seconds. After that, the TL25 will signal the
breakdown.

- 17 – TL25 User guide–- 33-60-021-000
1.13.4 Frames identified by the TL25
NMEA
Frame Description TOPLINE channels created
$xxGLL
Latitude, longitude, time and quality index LAT_DEGMIN, LAT_MILMIN, LON_DEGMIN,
LON_MILMIN.
$xxGGA
Latitude, longitude and time LAT_DEGMIN, LAT_MILMIN, LON_DEGMIN,
LON_MILMIN.
$xx-ZDA
Date and time ANNMOIS, HEUJOUR, MINSEC.
$xxRMC
Latitude, longitude, date, time, SOG, COG
and magnetic variation : in minimum data ; ANNMOIS, HEUJOUR, MINSEC.
$xxVTG
COG, SOG CAP_FOND, V_FOND.
$xxXTE
Cross-track error ECART_ROUTE, B_PILOT, C_WP_OD.
$xxAPB
Automatic pilot in A format ECART_ROUTE, B_PILOT, C_WP_OD.
$--RMB
XTE, latitude, longitude and distance and
heading to destination (DTW and BTW) in
minimum data. A_WP, D_WP
$xxBWC
Bearing and Distance to Waypoint A_WP, D_WP
$xxXDR
Measurement transmitter : stays tension or
temperature TEN_ETAIS.
$xxHDG
Magnetic heading, deviation and variation COMPAS, R_COMPAS.
$xxVHW
Surface speed, magnetic and true heading COMPAS, R_COMPAS, SPEEDO
$xxHDM
Magnetic heading, deviation and variation COMPAS, R_COMPAS.
$xxVLW
Surface distance LOCHJ, LOCHT.
$xxDBT
Depth beneath transducer PROF
$xxDPT
Depth beneath transducer and offset PROF
$xxMTW
Water temperature TEMP_EAU.
$xxMWV
Wind speed and wind angle ANG_VENT_APP, R_ ANG_VENT_APP,
ANEMO.
$xxVWR
Apparent wind speed and wind angle ANG_VENT_APP, R_ ANG_VENT_APP,
ANEMO.
$xxMMB
Atmospheric pressure BARO_2.
$xxMTA
Air temperature TEMP_AIR
$PNKEP,01
Target speed VIT_CIBLE.
$PNKEP,02
Heading at next board CAP_AUTRE_BORD.
$PNKEP,03
Optimum upwind angle ANGLE_OPT_VENT, REND_PRES,
REND_POLAIRE.
$PNKEP,04
Angles to optimise the CMG and VMG and
gain ANGLE_OPT_CMG, ANGLE_OPT_VMG, GAIN_ROUTE_CMG, GAIN_ROUTE_VMG.
$PNKEP,05
Current direction and speed DIREC_COURANT, VITES_COURANT.

- 18 – TL25 User guide–- 33-60-021-000
1.14Technical specifications
-Power supply : 10 to 16VDC
-Consumption : 20mA without lighting and 70mA with lighting.
-Tightness : IP67
-Weight : 1.3kg including cable
-Dimensions : height = 260mm ; width = 156mm ; thickness = 45mm
-Operating temperature : -10°C to +50°C
-Storage temperature : -20°C to +60°C
-Horizontal viewing angle : superior to 120°
-Vertical viewing angle : superior to 90°
-Height of the characters displayed : 25 mm for the channel, and 10 mm for the identifier and
the unit.
1.15 Version and address number of the display
You can check the software version of the display and its address in the list. In order to do that,
select the CONFIGURATION channel, then press the Ent key for 5 seconds. The date, time
and version of the TL25 software are then momentarily displayed on the screen.
1.16 Diagnostic for 1
st
level troubleshooting.
Before contacting technical support, please check the troubleshooting table below.
Problem Possible causes and solutions
The Topline installation does not detect the TL25
The bus cable is not or is badly connected to the terminal box : check the
plugging and the connection inside the terminal box. Check the state of
the cables : they must not show any sign of wear or cut.
The remote control does not control the TL25 The address of the remote control is lower than that of the TL25 :
reinitialise the remote control, see chapter 17.
The TL25 is set at the address « 0» : perform its initialization, see
chapter 17.
The TL25 displays the message « data wire error » Check that the black data wire is connected at the right location in the
terminal box : see chapter 17
The TL25 displays the message « collision error » It is possible that there are two master displays (at address 1) on your
installation : check the addresses, if it is the case, reinitialize one of the
displays.
The TL25 does not display the NMEA data : that from the GPS
for example.
Has the NMEA link been initialized ? see chapter 16
The NMEA link is not or is badly connected to the terminal box : check
the connection of the TL25 and that of the NMEA transmitter (GPS).
Your display indicates battery fault. Check the voltage of your battery with a voltmeter : the operating voltage
must be higher than 10VDC. Check the charge behaviour of your battery.
If you do not manage to solve the problem, please contact your distributor.
1.17 TL25 initialization : see chapter 4.8

- 19 – TL25 User guide–- 33-60-021-000
2 SENSOR CALIBRATION
Every nke sensor is adjusted at the factory. However, a calibration is required to adapt the
sensor to the specificities of your boat and to obtain an optimum measurement accuracy.
Follow the calibration procedure below, by visualising the settings on a display.
Please refer to the installation notice of the TOPLINE sensor that you wish to calibrate
2.1 Setting procedure of the calibration coefficient:
2.2 Offset setting procedure
Follow the above procedure and select the OFFSET sub-channel.
Note that the offset default value is 0.
CAUTION :
-The calib coef parameter is a multiplier coefficient. This value must never be equal to
zero. By default this coefficient is set to 1.00. If it is not the case, before starting a
calibration enter the value 1.00.
Ent
Ent
1
Using the key
you wish to set the coefficient of calibration.
2
press and hold downthe key
In order to access to the list of sub-channel UNIT, CALIB COEF & OFFSET, .
3
4
to select CALIB COEF.
TL 25
16.85
BOAT SPEED
KNOTS
, select the channel,
TL 25
CALIB COEF
Figure 12
Press successively the key
TL 25
UNIT
KNOTS
The coefficient is saved in memory
Validate and exit by maintinning
Ent
TL 25
CALIB COEF
1.20
Using , set the new
coefficient 1.20
5
, until the sub-channel UNIT appears then release.
The selected channel flickers.
nke
TL 25
16.85
BOAT SPEED
APP WIND A
105
274°
COMPAS HEAD
NOEUDS
DEGREES
DEGREES

- 20 – TL25 User guide–- 33-60-021-000
2.3 Autocompensation of the fluxgate compass
It is possible that on some boats, the Fluxgate Compass may be strongly disrupted by its
environment. Despite a careful installation and an offset properly adjusted, an important
difference remains between the magnetic heading displayed and the true magnetic heading,
throughout the measurement range between 0and 359°. In this case, you must perform an
autocompensation of the Fluxgate Compass to achieve an acceptable level of accuracy.
Please refer to the installation guide of the Fluxgate Compass sensor.
2.3.1 Principle of autocompensation
The operation consists in executing, at a rigorously rotation constant speed, a perfect circle
with your boat, clockwise. While the boat describes this circle, the sensor will record the
measurement points of a deviation curve, every 10° with an accuracy of 0.25°. Thus, your
Fluxgate Compass will be accurately corrected between 0and 359°.
2.3.2 Autocompensation procedure
In order to achieve a successful autocompensation, you must navigate :
-On smooth sea, with no current and no wind.
-Away from large magnetic masses such as cargo boats.
-In an open area allowing the execution of a circle with a diameter approximately 5 times the
length of the boat.
-At a constant speed of about 2 or 3 knots.
1. Select, on the upper display, the magn head channel,
2. Select the middle display with the key
3. Start to describe the circle, then press the 8 seconds on the key ▼, to trigger the
autocompensation procedure.
4. One single circle * is sufficient to perform the autocompensation correctly, when its a
success, the message 3000 is indicated.
* For the previous generation of compass, referenced as 90-60-005, at least three circles
must be executed.
In case of problem during autocompensation, the TL25 displays the PAN message , plus one
code :
-Code 1 : cancellation at user request.
-Code 2 : detection of a gyration in the opposite direction. Start again clockwise.
-Code 3 : excessive variation between 2 heading measurements. Reduce the speed of your
boat to 2 or 3 knots.
-Code 4 : angle correction higher than 20°. Start t he autocompensation procedure over.
In case of autocompensation error, the measurements are not saved to the memory and the
sensor resumes its normal operating mode.
CAUTION : the autocompensation operation of the Fluxgate Compass requires precision
in the execution of the circle : constant speed of 2 to 3 knots and constant diameter of the
circle. If you cannot maintain these two criteria, the autocompensation will not be
successful.