Simrad HS50 User manual

INSTRUCTION MANUA
L
Simrad HS50
Heading Sensor

Note!
Simrad AS makes every effort to ensure that the information contained within this
document is correct. However, our equipment is continuously being improved and
updated, so we cannot assume liability for any errors which may occur.
Warning!
The equipment to which this manual applies must only be used for the purpose for which
it was designed. Improper use or maintenance may cause damage to the equipment or
injury to personnel. The user must be familiar with the contents of the appropriate
manuals before attempting to operate or work on the equipment.
Simrad AS disclaims any responsibility for damage or injury caused by improper
installation, use or maintenance of the equipment.
Copyright
© 2002 Simrad AS
The information contained within this document remains the sole property of Simrad AS.
No part of this document may be copied or reproduced in any form or by any means, and
the information contained within is not to be communicated to a third party, without the
prior written consent of Simrad AS.

INSTRUCTION MANUAL
20221081 / F i
Instruction Manual
HS50 Heading Sensor
This manual is intended as a reference guide for installing,
operating and maintaining Simrad HS50 Heading Sensor.

Simrad HS50 Heading Sensor
ii 20221081 / F
Document revisions
Rev Date Written by Checked by Approved by
A12.06.02 FOS/
B26.09.02
C06.11.02
D02.04.03 FOS/
E06.11.03 FOS/
F07.01.04
Document history
Rev. A Original issue.
Rev. B The manual updated and rewritten.
Rev. C Cable pair numbers for Sensor unit corrected (page 13). Optional documentation for
additional languages added.
Rev. D Updated to correspond with PU sw version 2.02.03 and DU sw version 1.02.
Rev. E Updated to correspond with PU sw version 2.02.04, DU sw version 1.03.and SU sw version
1.02 . Dim. drawing for Sensor unit updated to show mounting direction.
Rev.F Corrected part number for HS50 Display unit mounting bracket (page 16).
To assist us in making improvements to this manual, we would welcome comments and
constructive criticism. Please send all such -in writing to:
Simrad Egersund AS
Nyåskaien
P.O. Box 55
N-4379 Egersund, Norway
or by e-mail to:
[email protected]

INSTRUCTION MANUAL
20221081 / F iii
Contents
1. INTRODUCTION ................................................................1
1.1 HS50 System components............................................. 1
1.2 About this manual ........................................................ 3
1.3 Definitions, abbreviations and acronyms.......................... 3
Definitions .......................................................................3
Abbreviations and acronyms...............................................4
2. TECHNICAL SPECIFICATIONS ...........................................5
2.1 Health, environment and safety ..................................... 5
2.2 Restrictions in guarantee............................................... 5
2.3 Restrictions in use ........................................................ 5
2.4 Performance data......................................................... 6
2.5 Physical dimensions...................................................... 6
Sensor unit ......................................................................6
Display unit .....................................................................6
Processing unit .................................................................7
2.6 Power......................................................................... 7
Processing unit .................................................................7
2.7 Environmental specification ........................................... 7
Sensor unit ......................................................................7
Display unit .....................................................................7
Processing unit .................................................................8
2.8 Cable ......................................................................... 8
Processing unit to sensor unit cable .....................................8
2.9 Interface..................................................................... 8
3. INSTALLATION..................................................................9
3.1 General ...................................................................... 9
3.2 Cable connection.......................................................... 9
3.3 Grounding................................................................... 9
3.4 Sensor unit ................................................................10
Location of the unit ......................................................... 10
Mechanical installation..................................................... 11

Simrad HS50 Heading Sensor
iv 20221081 / F
Cable wiring................................................................... 13
Waterproofing the connectors ........................................... 14
3.5 Display unit ................................................................14
Location of the unit ......................................................... 14
Panel mounting .............................................................. 15
Bracket mounting (option) ............................................... 16
Display unit cable ........................................................... 17
3.6 Processing unit ...........................................................18
Cable connections ........................................................... 19
Connecting to Simrad equipment ...................................... 21
3.7 Software setup procedure.............................................24
Display Adjustments........................................................ 25
Differential corrections..................................................... 26
Data output ................................................................... 27
Ethernet ........................................................................ 28
General ......................................................................... 28
Expert setup .................................................................. 30
4. OPERATING INSTRUCTIONS ...........................................33
4.1 Overview ...................................................................33
4.2 Turning the system ON/OFF..........................................34
4.3 Performance monitoring ...............................................34
Navigation/HDT display ................................................... 36
Navigation/POS display.................................................... 36
Info displays .................................................................. 37
4.4 Alarms.......................................................................39
Invalid Position alarm ...................................................... 40
Invalid Heading alarm ..................................................... 40
Invalid Position and Heading alarm.................................... 40
4.5 Operation...................................................................41
Height aided GPS position ................................................ 41
5. MAINTENANCE ................................................................43
5.1 General .....................................................................43
5.2 Periodic maintenance...................................................43
Sensor unit .................................................................... 43

INSTRUCTION MANUAL
20221081 / F v
Processing unit ............................................................... 44
Display unit ................................................................... 44
Software upgrades .......................................................... 44
5.3 Repairs and modifications.............................................45
Replacing damaged cables ............................................... 45
Replacing damaged units ................................................. 45
5.4 Troubleshooting ..........................................................45
No response................................................................... 46
No valid data.................................................................. 46
No Differential corrections ................................................ 47
Invalid Heading .............................................................. 47
Reduced heading indication .............................................. 48
Simulated data ............................................................... 48
6. FIGURES AND DRAWINGS...............................................49
6.1 Sensor unit, dimensions ...............................................50
6.2 Sensor unit bracket, dimensions....................................51
6.3 Sensor unit pedestal, dimensions ..................................52
6.4 Processing unit, dimensions..........................................53
6.5 Display unit, dimensions ..............................................54
7. PARTS LIST .....................................................................55
7.1 Standard delivery........................................................55
7.2 Optional equipment .....................................................55
7.3 Documentation ...........................................................55

Simrad HS50 Heading Sensor
vi 20221081 / F
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INTRODUCTION
20221081 / F 1
1. INTRODUCTION
1.1 HS50 System components
Simrad HS50 is a GPS compass that provides true heading
output with position, velocity and rate of turn information in
addition. This product replaces several vessel instruments with
one compact navigation package: gyrocompass, GPS system,
speed log and Rate Of Turn (ROT) indicator.
The HS50 comprises the following units:
The Sensor unit contains two GPS sensors, electronic board
with I/O and an inertial rate element.
The Sensor unit is to be mounted in the vessel’s mast or flat on
a roof or deck.
The Display unit contains an LCD for navigation information,
mainboard with CPU, flash, power and I/O, and buttons for
setup and operation of the HS50 system.
The Processing unit contains the mainboard with CPU, flash,
power, I/O and a terminal list.
SENSOR UNIT
DISPLAY UNIT
PROCESSING
UNIT
1m
30m
POWER INPUT
15m

Simrad HS50 Heading Sensor
2 20221081 / F
High-precision heading is derived from the fixed-distance dual
GPS antenna arrangement in the Sensor unit, using carrier phase
data to generate heading information independent of latitude and
vessel dynamics. GPS position and speed are calculated from
both antennas, which give redundant position and velocity
sources in this product. DGPS signals may be input to the HS50
to improve position and velocity accuracy, but has no impact on
the heading accuracy. Refer Performance data, page 6.
The inertial rate element provides yaw/ROT information. In case
of short GPS outages, the inertial sensor automatically takes
over as the prime source for heading determination until the
GPS comes back on line. Working together seamlessly, the
inertial and GPS elements of the system insure accurate,
continuous and robust heading information.
The Processing unit includes configurable output serial lines
(three RS-232 and three RS-422) and Ethernet connections
making it easy to distribute HS50 data to multiple users on
board the vessel.
The HS50 requires no scheduled maintenance or re-calibration.
The system offers flexible configuration of the output variables
and interface setup, depending on the vessel and application. It
is easy to operate, install and align.
The HS50 system has the following features:
•True heading anywhere on earth
•Replaces several instruments with one robust, integrated
product
•Heading available in periods of GPS drop-outs
•20 Hz update rate on heading and rate of turn measurements
•80°/sec follow-up rate
•Three RS-232 and three RS-422 configurable output serial
lines
•Output data on Ethernet
•Only one cable (no coax) between the mast unit and the
Processing unit on the bridge

INTRODUCTION
20221081 / F 3
1.2 About this manual
This manual is intended as a reference guide for operating,
installing and maintaining the HS50 Heading Sensor. Please
take time to read this manual to get thorough understanding of
the operation and system components.
In this manual the following notations are used:
Caution! Used to make the user aware of procedures and operational
practice which, if not followed, may result in degraded
performance or damage to the equipment.
Note! Used to draw the user's attention to special features or behavior
of the equipment.
1.3 Definitions, abbreviations and acronyms
Definitions
Alignment The process of adjusting the current internal navigation frame
(sensor-frame) in the instrument to the true vessel body frame.
Heading The direction of the main axis (bow direction) of the vessel.
This is opposed to course, which is the direction of the vessel
motion.
Yaw A rotation about the vertical axis and is positive when turning
eastward when the vehicle cruises in north direction. Normally
yaw means the dynamic yaw motion.

Simrad HS50 Heading Sensor
4 20221081 / F
Abbreviations and acronyms
CEP Circular Error Probability
COG Course Over Ground
DGPS Differential GPS
DU HS50 Display Unit
EPE Estimated Position Error
GPS Global Positioning System
GSA A standard NMEA message including GPS satellite ID
numbers, PDOP, HDOP and VDOP
HDOP Horizontal Dilution Of Precision
HGT GPS Antenna Height above the WGS-84 ellipsoid
IEC International Electrotechnical Commission
IMO International Maritime Organization
I/O Input/Output
NMEA National Marine Electronics Association. NMEA 0183 is a
standard for interchange of information between navigation
equipment
PDOP Positional Dilution Of Precision. This is the sum of the VDOP
and HDOP figure
PSXN20 A proprietary NMEA message including position, height and
heading quality information
PU HS50 Processing Unit
RFI Radio Frequency Interference
RF Radio Frequency
RMS Root Mean Square
ROT Rate of Turn
RRE Range Residual Error, a proprietary format
RTCM Radio Technical Commission of Maritime Services
SOG Speed over Ground
SSB Single Side Band
UTC Universal Time Co-ordinate. This is the official time in the
world and has replaced GMT (Greenwich Mean Time) as the
official time
VDOP Vertical Dilution Of Precision
VHF Very High Frequency
WGS-84 World Geodetic System of 1984

TECHNICAL SPECIFICATIONS
20221081 / F 5
2. TECHNICAL SPECIFICATIONS
2.1 Health, environment and safety
Operation or troubleshooting of HS50 equipment will not imply
any risk for high voltages, explosions or exposure to gas. The
HS50 is type-approved according to IEC 950/EN60950
standards regarding product safety (low voltage), and IEC
945/EN60945 standards on electromagnetic compatibility
(immunity/radiation) and vibration.
2.2 Restrictions in guarantee
The liability of the manufacturer is limited to repair of the HS50
only, and excludes consequential damages such as customer's
loss of profit or damage to other systems traceable back to HS50
malfunction. The warranty does not cover malfunctions of the
HS50 resulting from the following conditions:
a) The customer has opened the Sensor unit
b) Over-voltage or incorrect power connection
c) The equipment has been exposed to extreme chock and
vibrations
2.3 Restrictions in use
Simrad HS50 is designed for use on board marine surface
operated vessels with roll and pitch motions up to ±30°.
The HS50 function is based on GPS signals and requires free
sight to the sky, minimum 4 visible satellites, PDOP value less
than 6 and otherwise normal conditions to operate.

Simrad HS50 Heading Sensor
6 20221081 / F
2.4 Performance data
Heading accuracy, static:...............................................0.3° RMS
Heading accuracy, dynamic:..........................................0.5° RMS
Heading resolution:............................................................... 0.01°
Heading operational measurement range: .Roll/pitch within ±30°
Rate of turn accuracy:................................................. 0.5º/s + 5%
Position accuracy:...................................................5 m 95% CEP
Velocity accuracy: ............................................ 0.1 m/s 95% CEP
Follow-up rate:...................................................................80°/sec
The performance figures are valid with a minimum of 4 visible
satellites, HDOP less than 4, PDOP value less than 6, high
quality DGPS corrections * and otherwise normal conditions.
Excessive multipath, GPS signal obstructions or interference
may reduce the performance.
The HS50 Sensor unit includes two 12 channels GPS receivers.
* Has no impact on heading accuracy.
2.5 Physical dimensions
Sensor unit
Width ................................................................850 mm (33.5 in.)
Height: ................................................................205 mm (8.1 in.)
Depth: ...............................................................262 mm (10.3 in.)
Weight: ................................................................. 8 kg (17.6 lbs.)
Color: ...................................................................................White
Dimensional drawing........................................................Page 50
Display unit
Width: .................................................................220 mm (8.7 in.)
Height: ................................................................110 mm (4.3 in.)
Depth: ...................................................................39 mm (1.5 in.)
Weight: ................................................................ 0.5 kg (1.1 lbs.)
Color: ................................................................................... Black
Dimensional drawing........................................................Page 54

TECHNICAL SPECIFICATIONS
20221081 / F 7
Processing unit
Width: ...............................................................287 mm (11.3 in.)
Height: ...................................................................203 mm (8 in.)
Depth: ...................................................................60 mm (2.4 in.)
Weight: ................................................................ 1.3 kg (2.9 lbs.)
Color: ................................................................................... Black
Dimensional drawing........................................................Page 53
2.6 Power
Processing unit
Voltage:.................................................................. 10 to 36 V DC
Power consumption: .............................................................15 W
2.7 Environmental specification
Sensor unit
Enclosure material, sensor housing: .........................Polyethylene
Enclosure material bracket: ..........................Anodized aluminum
Enclosure protection:............................................................. IP65
Operating temperature range: ........... -30 to +55ºC (-22 to 131°F)
Operating humidity (max.): ................................................. 100%
Storage temperature range:............... -30 to +70ºC (-22 to 158°F)
Storage humidity (max.):..................................................... 100%
Safe distance to compass: ........................................ 0.2 m (0.7 ft)
Display unit
Enclosure protection:.............. IP-56 from front, IP-43 from back
Operating temperature range: ................0 to +55ºC (32 to 131°F)
Storage temperature range:............... -30 to +80ºC (-22 to 176°F)
Safe distance to compass: ..................................... 0.35 m (1.1 ft.)

Simrad HS50 Heading Sensor
8 20221081 / F
Processing unit
Enclosure material: .......................................Anodized aluminum
Enclosure protection:............................................................. IP44
Operating temperature range: ................0 to +55ºC (32 to 131°F)
Storage temperature range:................. -20 to +60ºC (-4 to 140°F)
Safe distance to compass: ........................................ 0.2 m (0.7 ft)
2.8 Cable
Processing unit to sensor unit cable
Type: ......................................................2x2x0.5 mm2 with shield
Maximum length:................................................... 100 m (328 ft)
Diameter: ..............................................................10 mm (0.4 in.)
Flame retardation:.....................................................IEC 332-3/A
2.9 Interface
Configuration:....... Display unit connected to the Processing unit
Data outputs:........................................Three RS-232 serial lines,
Three RS-422 serial lines,
Ethernet UDP/IP
Data inputs:.................... One RS-232 and one RS-422 serial line
DGPS corrections: ..... RTCM 104 version 2.2 and SAPOS®EPS
Baud rate:...........................................................Max. 38.4 kBaud
HDT, ROT, GGA and GLL data update rates:.......... Up to 20 Hz
HDT, ROT, GGA and GLL data delay:...............Less than 50 ms
ZDA and VTG data update rate:....................................Max 1 Hz
VTG data delay:......................................................... Max 1.5 sec
ZDA data delay:..................................................................... 1 ms
Data output formats:
•NMEA 0183 ZDA, GGA, GLL, VTG, HDT, ROT, GSA,
GRS and proprietary messages PSXN,20. The PSXN,20
message include position, height and heading quality
information
•RD Instrument ADCP proprietary NMEA format, "PRDID".
•Radar clock data

INSTALLATION
20221081 / F 9
3. INSTALLATION
3.1 General
The following parts are supplied with a standard HS50 system:
−Sensor unit with 1 meter cable w/connector and 4
fastening bolts
−Display unit with 15 meters cable to the Processing
unit and flush mounting kit
−Processing unit including 4 fastening screws
−30 meters cable to be used between Sensor unit and
Processing unit
−Documentation
Caution!
The Sensor unit has to be mounted in a way that
avoids blocking of the GPS signal.
The Processing and Display Unit can be
mounted on the bridge or in the instrument
room.
No units should be exposed to heavy vibration,
transformers or similar.
3.2 Cable connection
Use only shielded cables for the installation. This includes
power input and signal cables. The cables should be of 0.5 mm2
(AWG20) twisted pairs.
The cable to the Display unit and other cables (NMEA
input/output, Ethernet) should not be run in parallel with other
cables carrying RF or high current, such as VHF and SSB
transmitters, battery charges/generators and winches.
3.3 Grounding
All units in the HS50 system use the Processing unit as a
common ground/shield connection. The Processing unit should
therefore have a proper ground connection to the hull/bonding
system.

Simrad HS50 Heading Sensor
10 20221081 / F
3.4 Sensor unit
Location of the unit
The Sensor unit is the most important part of the HS50 system,
and great care should be taken when deciding the mounting
location.
The space above the Sensor unit has to be free of obstructions of
any kind. A GPS compass is more sensitive for blocking and
reflections (multipath) of GPS signals than GPS sensors that are
only used for calculating position. This since HS50 also utilizes
carrier phase measurements for heading determination, and both
GPS antennas need to see at least two common satellites at the
same time.
The unit should be protected from direct illumination of radar
beams and other transmitting antennas such as Inmarsat
antennas.
The Sensor unit has to be mounted horizontally in the mast or
directly on deck, with 5° maximum allowed deviation angle
from the horizontal plane. If mounted in the mast, the distance
from the unit to the nearest deck should be as large as possible
to reduce problem due to the multipath effect.
The unit should also be mounted parallel to the vessel’s
centerline with the bow arrow pointing forward. The heading
offset feature will however compensate for a heading offset
caused by the orientation of the Sensor unit. An eventual offset
correction is performed after the calibration as described in
Software setup procedure, Heading offset, page 31.

INSTALLATION
20221081 / F 11
Mechanical installation
The Sensor unit may be mounted in the mast or directly on the
deck.
The dimensional drawing for the Sensor unit on page 50 shows
dimensions and internal distance for the mounting holes and the
cable outlet.
Holder
If necessary, a user-made holder may be used as
shown on the figure when installing the unit.
Bracket
Pedestal
A mounting bracket (part no. 20213039) or a
mounting pedestal (part no 20213021) can be
delivered from Simrad by request. Dimensions for
these optional mounting devices are shown on page
51 and page 52.
Refer Bracket mounting (option), page 12, and
Pedestal mounting (option), page 13.
Caution! Independent on which fastening method that is used, the
Sensor unit should not differ more than ±5° from the vessel’s
horizontal plane and the alongships axis. If the mounting is
not within this tolerance, the heading accuracy will be
degraded.
Connectors with
Cable duct
Cable ties
self-bonding tape
Connect the cable from the Processing unit to
the cable from the Sensor unit.
Caution!
The connector junction must be sealed with
self-bonding tape for waterproofing. After
coiling, make bonding by hard pressure.
Use the required number of cable ties to fasten
the cable to the mast.

Simrad HS50 Heading Sensor
12 20221081 / F
Bracket mounting (option)
An optional mounting bracket (part no. 20213039) can be
delivered from Simrad by request.
Assemble the mounting bracket to the Sensor unit with the four
screws with washers as shown in the figure below.
4
10
11
12
Cable ties
Holder
self-bonding tape
Cable duct
Connector with
Connect the cable from the Processing unit to
the cable as described in page 11.