AGCO Valtra Smart farming User manual

OPERATOR'S MANUAL
Smart farming
39 924 21 5 ( 01/2020 )
YOUR
WORKING
MACHINE

Smart farming
1 Introduction .............................................................. 11
1.1 About this manual .................................................. 13
1.2 Intended use ........................................................ 14
2 Safety ....................................................................15
2.1 Safety instructions .................................................. 17
2.1.1 Safety symbol .................................................. 17
2.1.2 Safety messages ................................................ 17
2.1.3 Information messages ............................................ 17
2.1.4 Safety signs .................................................... 17
2.1.5 A word to the operator ............................................ 18
2.1.6 Safety information ............................................... 19
2.1.7 Electrical components ............................................ 19
2.1.8 Correct disposal of waste .......................................... 19
2.1.9 How to disengage the automatic steering .............................. 20
2.1.10 Radio frequency exposure requirements ............................... 20
2.1.11 UHF radio ..................................................... 20
3 Signal definition and characteristics ........................................21
3.1 Defintions .......................................................... 23
3.1.1 GNSS and correction signal .........................................23
3.1.2 Satellite reception ............................................... 23
3.1.3 Signal interruption ............................................... 25
3.1.4 Static and dynamic accuracy (satellite drift) ............................. 25
3.1.5 Convergence time ............................................... 25
3.1.6 Accuracy and strength indicator ..................................... 25
3.1.7 Valtra Guide status ............................................... 26
3.1.8 Basic system features ............................................ 26
3.1.9 Restrictions .................................................... 27
3.1.10 Deactivation ....................................................27
3.2 Specifications .......................................................28
3.2.1 Overview of correction signals depending on the receiver ...................28
3.2.2 Available correction signals: NovAtel receiver ............................ 28
3.2.3 NovAtel: TerraStar frequencies and coverage ............................ 29
3.2.4 Available correction signals: Trimble receiver ............................ 30
3.2.5 Trimble: RTX frequencies and coverage ................................ 31
3.2.6 Trimble: RTX frequencies .......................................... 31
3.3 Correction source settings ........................................... 32
3.3.1 Valtra Guide receiver status .........................................32
3.3.2 Valtra Guide receiver info .......................................... 32
3.3.3 NovAtel receiver .................................................33
3.3.4 Trimble receiver ................................................. 36
3.3.5 Use Fallback ................................................... 40
3.3.6 NMEA output ...................................................41
3.3.7 Insert a SIM card ................................................ 42
3.3.8 Upgrade the receiver's authorization level .............................. 45
4 Valtra Guide operation .................................................... 47
4.1 Valtra Guide modes ................................................. 49
4.2 Map screen ......................................................... 50
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4.3 GO! mode .......................................................... 52
4.3.1 Start GO! mode ................................................. 52
4.3.2 Make a wayline ................................................. 54
4.3.2.1 Make a straight wayline (A-B) .............................. 54
4.3.2.2 Make a contour wayline .................................. 55
4.3.2.3 Make an angle wayline (A+ heading) .........................56
4.3.3 Engage Valtra Guide .............................................. 56
4.4 Field Mode ......................................................... 58
4.4.1 Pre-activate Valtra Guide ........................................... 58
4.4.2 Adjust the implement settings ...................................... 58
4.4.3 Manage fields .................................................. 60
4.4.3.1 Navigate to a field ...................................... 61
4.4.3.2 Use the automatic field detection ........................... 62
4.4.4 Record the field boundary .......................................... 63
4.4.5 Waylines ...................................................... 66
4.4.5.1 Make a straight wayline (A-B) .............................. 66
4.4.5.2 Make a contour wayline .................................. 67
4.4.5.3 Make an angle wayline (A+ heading) .........................69
4.4.5.4 Manage waylines ...................................... 71
4.4.6 Wayline assistant ................................................ 71
4.4.6.1 Record a single contour .................................. 72
4.4.6.2 Record a segmented wayline .............................. 73
4.4.6.3 Make a segmented wayline from boundary .................... 75
4.4.6.4 Make a segmented wayline from existing waylines .............. 76
4.4.6.5 Use the wayline configurator .............................. 77
4.4.6.6 Segmented wayline in Map screen .......................... 79
4.4.6.7 Adjust the segmented wayline oset ........................ 79
4.4.7 Wayline oset adjustment ......................................... 80
4.4.7.1 Use the manual wayline oset ............................. 81
4.4.7.2 Save wayline oset as new wayline ......................... 81
4.4.7.3 Automatic wayline oset ................................. 82
4.4.7.4 Use the mounting oset setting ............................ 83
4.4.8 Use the tramlines ................................................ 84
4.4.9 Record field boundary and wayline at the same time ...................... 85
4.4.10 Make a headland ................................................ 86
4.4.11 Obstacles ..................................................... 87
4.4.11.1 Make a small obstacle ................................... 87
4.4.11.2 Make an area obstacle ................................... 89
4.4.11.3 Manage obstacles ...................................... 90
4.4.12 Use the markers ................................................ 91
4.4.13 Do a check of the system information ................................. 93
4.4.14 Engage Valtra Guide .............................................. 94
4.5 Adjust the steering settings ..........................................96
4.6 Paint the worked area on the Map screen ............................. 97
4.7 Reset the painted area .............................................. 98
4.8 Adjust the alarm settings ............................................ 99
4.9 Use Valtra Guide with QuickSteer ................................... 100
4.10 Valtra Guide with TwinTrac and QuickSteer .......................... 102
5 Section Control operation ................................................ 103
5.1 Section Control .................................................... 105
5.1.1 Open the Section Control screen .................................... 105
5.1.2 Implement settings ..............................................106
5.1.3 Activate and deactivate Section Control ............................... 106
5.1.4 Activate and deactivate headland mode ............................... 107
5.1.5 Overlap settings ................................................ 108
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5.1.5.1 Adjust the in-field overlap ................................ 108
5.1.5.2 Adjust the boundary overlap .............................. 109
5.1.5.3 Adjust overlap for driving direction ......................... 109
5.1.5.4 Adjust the tolerance of the outer section of the implement ........110
5.1.6 Delay time for switch-on and switch-o ............................... 110
5.1.6.1 Adjust the switch-on time ................................ 111
5.1.6.2 Adjust the switch-o time ................................112
5.1.6.3 Reset the adjusted delay times ............................ 113
6 TaskDoc operation ....................................................... 115
6.1 TaskDoc and TaskDoc Pro ........................................... 117
6.1.1 Activate and deactivate Task Controller ................................117
6.1.2 Manage tasks .................................................. 118
6.1.3 Task elements ................................................. 118
6.1.4 Configure task ................................................. 119
6.1.5 Start and pause task ............................................. 121
6.1.6 Save and export task .............................................122
6.1.7 Data exchange information ........................................ 123
6.1.7.1 Pair the Bluetooth radio module with the SmartTouch display ...... 123
6.1.7.2 Operate the TaskDoc Manager software ..................... 124
6.1.7.3 Test the Bluetooth and internet connection ................... 125
6.1.7.4 Exchange data between tractor and PC through Bluetooth
connection .......................................... 126
6.1.7.5 Exchange information between tractor and PC through internet
connection .......................................... 128
7 Variable Rate Control .....................................................129
7.1 Variable Rate Control ............................................... 131
7.1.1 Use Variable Rate Control ......................................... 131
8 ISOBUS AUX ............................................................ 135
8.1 ISOBUS AUX ...................................................... 137
8.1.1 Functions types ................................................ 137
8.1.2 Add ISOBUS AUX function to SmartTouch ............................. 138
8.1.3 Clear all the ISOBUS AUX allocations ................................. 140
9 USB Device ..............................................................141
9.1 USB data transfer .................................................. 143
9.1.1 Export data to a USB device ....................................... 144
9.1.2 Import data from a USB device ..................................... 144
10 Troubleshooting ......................................................... 145
10.1 See the cause of Valtra Guide disengagement ........................ 147
10.2 Store diagnostic data for fault finding ............................... 148
10.3 Calibrate the navigation controller (GYRO) ........................... 149
10.4 Reset the Valtra Guide and QuickSteer steering valve ................. 151
10.5 Errors and faults ................................................... 152
10.6 Troubleshooting ....................................................154
11 Accessories ..............................................................159
11.1 Additional SmartTouch display ...................................... 161
11.1.1 Use the additional SmartTouch display ................................ 161
11.2 Base station ....................................................... 163
11.2.1 Scope of delivery and accessories ................................... 163
11.2.2 Base station overview ........................................... 166
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11.2.3 LEDs ........................................................ 167
11.2.4 Operating modes ............................................... 167
11.2.5 Charge battery ................................................. 168
11.2.6 Set up and connect the base station ................................. 168
11.2.7 Operate base station with external battery ............................. 169
11.2.8 Switch base station to ON mode .................................... 169
11.2.9 Switch base station to STANDBY mode ............................... 169
11.2.10 Switch base station to OFF mode ................................... 170
12 Index ................................................................... 171
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1 Introduction
1.1 About this manual ...................................................... 13
1.2 Intended use ........................................................... 14
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1.1 About this manual
This manual is the operator's manual for the Valtra Smart Farming systems. This manual is intended to be
used in conjunction with the Operator's manual of the tractor. The instructions here apply to the operation
of the Valtra Smart farming systems. For general instructions regarding the operation, safety, maintenance
and service of the tractor, see other user documentation of the tractor.
Valtra Guide is a satellite-based automatic steering system, which steers the tractor along predefined path.
Read this manual carefully before you use the Valtra Guide system. When you use the Valtra Guide system,
obey the safety instructions of this manual and those of the Operator's manual of the tractor.
Valtra Guide system is intended to be used only in a safe and suitable area. Even if the system makes
steering automatic, be careful when you use it. Stay alert in the cab and make sure that you are ready to
operate the steering yourself when necessary.
If the Valtra Guide system needs service, speak to your local Valtra dealer / workshop.
GUID-97F40818-5C9A-4AB5-A7BC-8520B7A02B4C [V3]
1. Introduction
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1.2 Intended use
Valtra Guide is designed solely for use in agricultural operations.
Do not use this machine for applications or purposes other than those described in this manual. The
manufacturer accepts no liability for damage or injury resulting from misuse of this machine.
Compliance with the conditions of operation, service and repair as specified in the manufacturer
instructions constitute essential elements for the intended use of this machine.
Only qualified persons who are familiar with Valtra Guide and its characteristics and relevant safety rules
and procedures can operate, service and repair Valtra Guide.
Obey all generally recognized safety regulations and road trac regulations.
Any unauthorized modifications performed on this machine will relieve the manufacturer of all liability for
any resulting damage or injury.
GUID-7D0C2530-180D-4D16-AE87-F3AFF088CDB0 [V2]
1. Introduction
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2 Safety
2.1 Safety instructions ...................................................... 17
2.1.1 Safety symbol ...................................................... 17
2.1.2 Safety messages .................................................... 17
2.1.3 Information messages ................................................ 17
2.1.4 Safety signs ........................................................ 17
2.1.5 A word to the operator ................................................ 18
2.1.6 Safety information ................................................... 19
2.1.7 Electrical components ................................................ 19
2.1.8 Correct disposal of waste .............................................. 19
2.1.9 How to disengage the automatic steering .................................. 20
2.1.10 Radio frequency exposure requirements ................................... 20
2.1.11 UHF radio ......................................................... 20
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2.1 Safety instructions
2.1.1 Safety symbol
The safety symbol tells you about an area that can
be dangerous!
Look for the safety symbol in this manual and on
the machine. The safety symbols tell you that
there are important safety instructions in the
manual.
GUID-087C8B07-BA1A-4AC8-93FF-E28F097F1E16-high.jpg [High]
Fig. 1
2.1.2 Safety messages
The words DANGER, WARNING or CAUTION are
used with the safety symbol. Learn these safety
messages and obey the recommended
precautions and safety instructions.
DANGER:
If you do not obey the recommended
precautions and safety instructions,
DEATH OR INJURY will occur.
WARNING:
If you do not obey the recommended
precautions and safety instructions,
DEATH OR INJURY can occur.
CAUTION:
If you do not obey the recommended
precautions and safety instructions,
INJURY can possibly occur.
GUID-73F05026-C37B-415A-8140-AD939A283378-high.jpg [High]
Fig. 2
2.1.3 Information messages
The instructions important and note are not related to personal safety. They give information about the
operation and maintenance of the machine.
IMPORTANT:
If you do not follow the special instructions or procedures, you can cause damage to the machine. You can
also cause damage to the process, or the area around the machine.
NOTE: Information to help you do the procedure, or help you to understand.
2.1.4 Safety signs
WARNING:
Do not remove the safety signs. Replace the safety signs that you cannot read, are
damaged, or are missing.
Clean the machine surface with a weak soap and water solution before you replace the safety signs. The
replacement safety signs are available from your dealer.
[V]
GUID-5D9F270E-D748-4741-82B1-BE49B78685F2 [V6]
GUID-E54F7740-C021-42A8-8784-4287BE4356C8 [V4]
GUID-9A909F52-D57E-4C30-8CC7-6FDB6D7E9982 [V4]
GUID-2FB17168-6A01-47C5-B298-234AF171520B [V8]
2. Safety
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Always make sure that the safety signs are in the correct locations and that you can read the safety signs.
The illustrations of safety sign locations are in this section.
Keep the safety signs clean. If necessary, use a weak soap and water solution.
2.1.5 A word to the operator
It is your responsibility to read and understand the
safety section in this manual and the manual for all
implements before you operate this machine. You
are responsible for your safety. Good safety
procedures prevent injury to you and the persons
around you.
Make the information in the safety section of this
manual a part of your safety procedure. This safety
section is written only for this type of machine.
Safety is your responsibility. You can prevent injury
and death.
This safety section gives basic safety examples
that can occur during the operation and
maintenance of your machine. This safety section
is not a replacement for safety instruction in other
sections of this manual.
Injury or death can occur if the safety instruction is
not obeyed.
Learn how to operate the machine and how to use
the controls correctly.
Do not operate the machine if you do not know
how to operate the machine. Do not let persons
operate the machine that do not know how to
operate the machine.
Follow all safety instructions in the manuals and on
the safety signs on the machine, the implements,
and the attachments.
Use only approved attachments and implements.
Make sure that your machine has the correct
equipment that is necessary by the local
regulations.
WARNING:
Do not use alcohol or drugs that can
have an eect on alertness or
coordination. If you use prescription
or 'over the counter' drugs, get
medical advice about the safe
operation of machines.
CAUTION:
If attachments or implements used
with this machine have a dierent
operator manual, see that operator
manual for other important safety
instructions.
GUID-AC91CCF6-1FF8-4A85-97A1-2D1562806825-high.jpg [High]
Fig. 3
GUID-F38BCC9A-5A98-41F3-BA3C-2C5AB224EDFB [V7]
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2.1.6 Safety information
Failure to obey basic safety rules and precautions cause most personal injuries that occur during product
operation, maintenance or repair work. You can usually avoid an injury when you recognize dangerous
situations before the injury occurs.
It is necessary that the operator is alert to the possible dangers at all times. The operator must have the
necessary training, skills and tools to use the equipment correctly.
Incorrect operation, maintenance or repair of this product can be dangerous and can result in injury or
death.
Do not operate, perform maintenance or do repair work on this product until you have read and understand
the operation, the maintenance and the repair information.
Safety precautions and warnings are included in this manual and on the product. Injury or death can occur
to the operator and other people if the operator does not obey the warnings.
It is not possible to anticipate all dangerous situations and conditions. The warnings in this publication and
on the product are, therefore, not all inclusive. If you use a tool, procedure or technique that we do not
recommend, you must make sure that it is safe for you and for others.
It is necessary to make sure that the operation, maintenance or repair work does not damage the product
or make it unsafe. Information, specifications, and illustrations in this publication come from information
available at the time of publication production.
Specifications, torques, pressures, measurements, adjustments, illustrations and other items can change
at any time. These changes can have an eect on the service that is given to the product. Before you start
to use the equipment, you can get the complete and most current information from approved Valtra
dealers.
If the (GNSS) satellites or dierential correction signal are lost, this system is momentarily disabled.
If this product is dropped, altered, transported or shipped without correct packaging or otherwise treated
without care, erroneous measurements can occur.
Periodically test this product to make sure measurements are accurate.
Contact AGCO immediately if this product does not operate correctly.
CAUTION:
Do not move a reference station when it is in operation. If you move a reference station
that is in operation, the controlled steering of a system that uses the reference station is
interfered. This can cause personal injuries or damage to property.
Do not erect the reference station below or near high-voltage power lines.
To avoid exposure to radio frequencies, stay at least 25 cm away from the modem.
When you use the portable reference station, it is necessary that the tripod is securely installed.
2.1.7 Electrical components
WARNING:
Incorrectly connected power can cause severe damage to people or the equipment.
Make sure all the power cables to the system components are correctly connected. See the machine
operator manual for safety information.
2.1.8 Correct disposal of waste
Incorrect disposal of waste can pollute the environment and ecology. As the product has a lithium battery
with perchlorate material, special handling is necessary. If the battery is dead, recycle the battery correctly.
GUID-9020B276-9052-4DA3-B946-1B537750BE5E [V1]
GUID-DA042C9A-E953-4756-ABFE-52E2A9D94789 [V3]
GUID-71B75D2D-A081-4CB5-B68B-535B64EE1AAE [V1]
2. Safety
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Dierent regional regulations can have an eect on how the battery is discarded or recycled. Inquire with
local environmental or recycling center on the proper way to recycle or dispose waste.
2.1.9 How to disengage the automatic steering
If the angle between the driving line of the tractor and the wayline is more than 75°, Valtra Guide
disengages. If the distance to the wayline is too much, Valtra Guide disengages. With the decimeter
precision, the maximum distance is 1.2 meters. With the centimeter precision, the maximum distance is
0.6 meters.
It is necessary to disengage the automatic steering and control the tractor manually in these conditions.
• The line of travel is blocked.
• The tractor does not stay on course.
Valtra Guide disengages also when you get up from the operator's seat. However, we do not recommend
that you disengage Valtra Guide with this procedure when the tractor moves.
Procedure
1. These manual procedures disengage the automatic steering:
a) Turn the steering wheel clockwise or counterclockwise for some degrees.
If the TwinTrac reverse drive system is not used, the steering wheel for TwinTrac does not
disengage the automatic steering. If the TwinTrac reverse drive system is used, the front steering
wheel does not disengage the automatic steering. But the front steering wheel does have an
eect on the steering.
b) Drive less than 0.1 km/h for at least 10 seconds.
c) Deactivate Valtra Guide from the master activation switch.
2. If these procedures do not disengage the automatic steering, push the Valtra Guide engage button.
2.1.10 Radio frequency exposure requirements
To comply with the radio frequency exposure requirements, maintain at least 25 cm (10 in) between the
user and the radio modem.
Handling the cord of this product, or cords associated with accessories sold with this product, will expose
you to lead, a chemical known to the State of California to cause birth defects or other reproductive harm.
Wash hands after handling.
2.1.11 UHF radio
A license is necessary if you use an Ultra High Frequency (UHF) radio. Fines and other penalties can be the
result if you use a UHF radio without a license. It is necessary to obey all local laws when you use a UHF
radio. Local authorities can give more information on what is necessary when you use a UHF radio.
Every country have their own individual UHF radio frequencies. Before the use of UHF radio, do a check of
the allowed frequencies from your local authorities and set the UHF radio frequency accordingly.
Because of the Real Time Kinematic (RTK) mode, UHF is the most common choice of communication
between a base station and a receiver. The quality and strength of the UHF signals have an eect on the
range for UHF communications.
1. Local conditions, such as topography, local communications and meteorological conditions, have an
eect on the range of the system and the RTK communications. If necessary, use a scanner to find
clear channels.
2. It is possible to increase the range of the system if you adjust the base station antenna in these
procedures:
• The radio modem of the base station must have a fully charged battery.
• Directional antennas and repeaters increase the system range. With the directional antennas, you
get the full signal power from a narrower direction and thus increase the range of the system.
GUID-735CC2A2-B31A-4884-9C8A-4B3455841B8B [V2]
GUID-F5471649-1510-49D7-BC62-EBDDE8633B83 [V3]
GUID-4A0E348D-8862-48F6-84BB-C8D98B081944 [V2]
2. Safety
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3 Signal definition and characteristics
3.1 Defintions .............................................................. 23
3.1.1 GNSS and correction signal ............................................ 23
3.1.2 Satellite reception ................................................... 23
3.1.3 Signal interruption ................................................... 25
3.1.4 Static and dynamic accuracy (satellite drift) ................................. 25
3.1.5 Convergence time ................................................... 25
3.1.6 Accuracy and strength indicator ......................................... 25
3.1.7 Valtra Guide status ................................................... 26
3.1.8 Basic system features ................................................ 26
3.1.9 Restrictions ........................................................ 27
3.1.10 Deactivation ....................................................... 27
3.2 Specifications .......................................................... 28
3.2.1 Overview of correction signals depending on the receiver ...................... 28
3.2.2 Available correction signals: NovAtel receiver ................................28
3.2.3 NovAtel: TerraStar frequencies and coverage ................................ 29
3.2.4 Available correction signals: Trimble receiver ................................ 30
3.2.5 Trimble: RTX frequencies and coverage .................................... 31
3.2.6 Trimble: RTX frequencies .............................................. 31
3.3 Correction source settings ............................................... 32
3.3.1 Valtra Guide receiver status ............................................ 32
3.3.2 Valtra Guide receiver info .............................................. 32
3.3.3 NovAtel receiver .................................................... 33
3.3.4 Trimble receiver ..................................................... 36
3.3.5 Use Fallback ....................................................... 40
3.3.6 NMEA output ...................................................... 41
3.3.7 Insert a SIM card .................................................... 42
3.3.8 Upgrade the receiver's authorization level .................................. 45
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3.1 Defintions
3.1.1 GNSS and correction signal
GNSS (Global Navigation Satellite System) is a global navigation satellite system designed for position
determination and navigation using satellite signals and signals received from pseudolites (terrestrial
transmitters which emit signals like those of a satellite).
GNSS satellites communicate their exact position and time via radio. For position determination a receiver
has to be supplied with signals from at least four satellites simultaneously. The four signal propagation
times (from the satellites to the receiving aerial) are then calculated in the receiving device. This is used to
determine the current position.
Stationary receiving stations improve positional accuracy by transmitting correction signals (DGPS) to
users:
• With geostationary satellites such as the European EGNOS, the American WAAS and various other
providers
• Terrestrially with a base station or RTK network
3.1.2 Satellite reception
It is possible that for example dense trees, copses,
buildings and high-voltage power lines block the
GNSS signal and the correction signal.
(1) A blocked signal
1
GUID-02BD1980-0148-4AC6-B380-3041E2813FD3-low.svg [Low]
Fig. 1
The GNSS signal and correction signal are not
available when the satellite is less than 5 to 8
degrees above the antenna level.
NOTE:
The correction signal satellite is geostationary
above the equator.
(1) Small signal angle
1
GUID-0EBD138B-4696-4A3D-822C-30E0A273D2A3-low.svg [Low]
Fig. 2
[V]
GUID-AF9BC585-62F3-4656-B531-687FA4CFF466 [V3]
GUID-A9DA2B32-4F5D-4306-86C5-AA6B330C38B4 [V3]
3. Signal definition and characteristics
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For example trees, copses, buildings and high-
voltage power lines can block the GNSS signal.
(1) GPS 1 is blocked
(2) GPS 2 is blocked
(3) GPS 3 is not blocked
(4) GPS 4 is not blocked
(5) GPS 5 is not blocked
1
2
3
4
5
GUID-D1622DC5-B9C6-4AC4-BEFD-3823A75B64D2-low.svg [Low]
Fig. 3
Valtra Guide can break the connection to certain
satellites, including the correction signal satellite, if
the vehicle is operated on slopes. Slopes can
cause the satellite to be out of the reception range
of the antenna.
(1) Angle 5-8°
(2) GPS 1
(3) Correction signal satellite
(4) GPS 2
(5) GPS 3
(6) GPS 4
1
2
3
4
5
6
GUID-2A6BB5F3-F0C6-4491-B933-7E41B226F2EE-low.svg [Low]
Fig. 4
Valtra Guide steers the machine but it does not
steer the implement.
If the implement does not run concentrically to the
vehicle because it is pulled downhill, for example,
the automatic steering is not as accurate.
GUID-5FFB845D-BA97-4D5A-ABCA-D3FCFC00FF98-high.jpg [High]
Fig. 5
3. Signal definition and characteristics
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• The wave angle and thus reception of the
correction signal decreases as the vehicle
moves north.
• Hills can make the reception of satellite signals
weaker.
• The GNSS system does not oer uniform
availability around the clock and for every
location.
GUID-D096BA8E-C107-4C0B-80E8-A486E76B3E4F-high.jpg [High]
Fig. 6
3.1.3 Signal interruption
Position determination takes a certain amount of time after activation before reaching the specified level of
accuracy. Temporary obstruction may cause the system to lose its connection to the satellite signal. This
may result in reduced levels of accuracy, the need to redetermine position, or failures depending on the
system.
3.1.4 Static and dynamic accuracy (satellite drift)
Satellite drift
A certain amount of drift occurs on satellite-based navigation systems. The accuracy is therefore defined
statistically and specified as a percentage of the operational period.
•Static accuracy: Measured position of the stationary machine over 1–3 days. The average value
determined states how close the measured value comes to the actual position.
•Dynamic accuracy: Pass-to-pass accuracy from wayline to wayline, which must be achieved when
crossing the field within 15 minutes. If a longer period of time passes between two passes, a certain
amount of drift will be noticeable.
3.1.5 Convergence time
The convergence time is the time necessary for the system to determine the position of the tractor after
you activate the system. It is necessary to give some time to the satellite-based correction signals to get
the correct level of accuracy. Signal interruptions, for example buildings, trees and other obstacles, make
this procedure slower. If there is an extended stop in the correction signal, the level of signal precision
decreases, and the system does the signal settings again.
3.1.6 Accuracy and strength indicator
NOTE:
Automatic wayline guidance can only be activated with the yellow bar displayed.
The accuracy of positioning is dependent upon the positions of the satellites relative to each other and the
position of the receiver, as well as the accuracy of time measurement and the runtime.
At favourable angles (~ 90°), the accuracy of measurement will be greater than at acute angles or angles of
approx. 180°.
HDOP (Horizontal Dilution of Precision)
The HDOP value is a measure of measured value scatter; the lower the value, the lower the degree of
measurement error.
SV
GUID-C3AD2D91-8A28-435D-B8F6-51E37A491962 [V1]
GUID-7CF2F5A9-3FE9-4108-BE7E-4AC31003BED3 [V3]
GUID-039C1E61-42EB-4B16-9DFC-3E8B189569C4 [V1]
GUID-9F5E9435-E526-407D-8604-BCC4AB3332D0 [V2]
3. Signal definition and characteristics
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