DIGITAL YACHT LTD
HSC100 Quick Start Guide
NMEA-0183
There are two versions of the HSC100 and both output NMEA data at 4800 baud, no partity, 1 stop and start bit. The
NMEA 0183 data sentences that the HSC100 outputs, will depend upon the model you have;
HSC100
-
pre-configured to output
$HCHDG,xxx.x,,,,*yy
.
HSC100T
-
pre-configured to output
$HEHDT,xxx.x*yy
and
$HEROT,z.z,A*yy
Where XXX.X = the compass heading, Z.Z = the rate of turn and YY = the NMEA checksum.
For interfacing to some systems, it is necessary to re-configure the HSC100 to output different NMEA sentences. This is
possible and a Tech Note is available that explains this procedure. Please download Tech Note 00041-2012 from the
Support section of our
Furuno AD-10
The HSC100 has a separate, dedicated output in Furuno AD-10 format. This is a proprietary 4 character serial format,
which gives heading in degrees and tens of minutes. The string 0872 represents the heading 87° 20’ so that the precision
is to 1/6 of a degree. At the same time the HSC100 would be also sending the NMEA data to a precision of 1/10 of a
degree.
480µs
100ms minimum
Duration of data is 16 clocks each
high=low=30
µs. Total = 480µs.
Frequency of data packets is set by
the interval command. Max = 10Hz
Clock
Data
5. Calibrating the Compass
When any compass is installed the magnetic characteristics of the whole installation
affect the way the Earth’s field
reaches the detector inside the device. Each individual installation will be different and so the HSC100 is equipped with
an auto-calibration routine which corrects for these installation distortions of the magnetic field.
Calibration must always be done with the unit in its final mounted position. The essential point of the calibration is to
remove the influence of nearby pieces of iron and steel
–so it is essential that these remain unchanged after calibration.
If any significant iron component is altered
– such as the installation of new equipment or replacement of equipment such
as winches or engines
– then the calibration must be re-done.
Compass Calibration is best done in calm waters when no other vessels
are around and with minimum wind and tide;
1) Steer a straight course of around 180º and when safe to do so
2) Start a slow turn to starboard (clockwise).
3) As you pass through 270º press the push button Switch 1
4)
Continue your turn at a slow and constant speed, through a full
400º. It is important that the turn is completed at a constant rate,
taking no less than 60 seconds and no more than 180 seconds.
1
2
3
4
