Table of Contents
Advertisement
Log Calibration
Function
2. Press both arrow buttons briefly.
3. Adjust the calibration number "c" with the
left or right button. The calibration must be
made after installation, since the water speed
in vicinity of the sensor may deviate by +/-
20% from the boat speed, depending on the
sensor location.
Standard Calibration Factor:
Regatta Speed Sensor:
Cruise Speed Sensor:
Planing Speed Sensor:
Universal Speed Sensor:
Airmar Ultrasonic Speed
Sensor (CS 4500):
After modifying the calibration number, the
indicated boat speed will change by the same
relative amount (e.g. changing the calibration
number from 50 to 55 will modify the speed
indication from 10 to 11 knots).
An accurate calibration has to be done with
the Trip Distance counter. E.g. after running
9,0 NM, the Trip Distance shows 10,0 NM. In
this case, the calibration number has to be
reduced by 10%. If it was 50, it should be set
to 45 now.
If a weak set/current is present, the run
has to be made in two directions. Calibration
can not be done with a strong current.
If desired, calibration can also be made in
mph, km/h or m/s, except if a wind instrument
is connected to the bus, in which case the log
must be calibrated in knots.
Special case: should you wish to calibrate
two log sensors with different calibration num-
bers, then the other display with the other log
sensor should be disconnected from the bus
during the process.
The calibration
number can be en-
tered only at the
display(s) where a
log sensor is con-
nected (and the Sen-
sor Type Number has
been configured).
1. Select Speed
C 50
C 31
C 30
C 38
C 31
Log Speed received by NMEA:
Log Speed (water speed) may be received
from a different instrument system through
NMEA data on any Tecnautic NMEA input
(could be a Display unit, Fly-By-Wire unit,
Autopilot Drivebox or Engine FADEC-Box).
The received log speed will be displayed
and used in the same manner as if it were
coming from a log sensor. However it cannot
be recalibrated, and will not be used for the
log distance or trip counter.
Log Speed replaced by GPS-speed:
In the absence of Log Speed Data, Water
Speed will be substituted automatically by
GPS Ground-Speed.
This feature permits the use of the autopilot
True Wind Mode, even in the absence of a log
sensor.
Keep in mind, that True Wind data will be
affected whenever ground speed is not equal
to water speed. With water speed available,
true wind is shown relative to the water body.
When ground speed is substituting water
speed, true wind will be shown relative to
ground.
Remark: when NMEA-water speed data
are received on a different NMEA-input than
the GPS-speed, make sure that water speed
data are received first, BEFORE GPS-speed
data come into the system. The first source,
with valid data after power up, will be used
until next reset or power up of the unit.
4
GND-Speed and
GMD-Track
Ground Speed
Ground speed is
shown in knots, as
received from the
GPS.
Use right button
for ground track.
Ground Track
Magnetic ground
track, as received
from the GPS.
ATTENTION: the
ground track from the
GPS becomes inac-
curate at low speed.
Advertisement
Table of Contents
