AGRA-GPS CRG Manuel utilisateur
CRG USER MANUAL
August 2022
AGRA-GPS Ltd. CRG User Manual
August 2022 ii
Contact information
Agra-GPS Ltd.
Box 2585
Stony Plain, AB
T7Z 1X9
CANADA
+1 (780) 990 4052
www.agra-gps.com
Release Notice: This is the August 2022 release of the CRG User Manual.
It is assumed that users of the products described herein have technical experience as well as an
understanding of the fundamentals of agricultural machinery.
In this manual, “CRG” may refer to the CRG-FENDT, CRG-CLAAS, or other variants.
This manual and others related to the CRG may be found on the CRG product page:
https://www.agra-gps.com/product/crg-chameleon-rtk-guidance
Disclaimer
While every effort has been made to ensure the accuracy of this document, Agra-GPS Ltd assumes
no responsibility for omissions and errors. Nor is any liability assumed for damages resulting from
the use of information contained herein. Agra-GPS Ltd shall not be responsible or liable for
incidental or consequential damages or a loss of anticipated benefits or profits, work stoppage or
loss, or impairment of data arising out of the use, or inability to use, this system or any of its
components.
DO NOT USE THE CRG IF YOU DISAGREE WITH THE DISCLAIMER.
AGRA-GPS Ltd. CRG User Manual
August 2022 iii
Important Safety Information
Read this manual and the machine operation & safety instructions carefully before installing the
CRG. Refer to Appendix A for Product Specifications.
•Follow all safety information presented within this manual.
•If you require assistance with any portion of the installation or service of your equipment,
contact Agra-GPS for support.
•Follow all safety labels affixed to the system components. Be sure to keep safety labels in
good condition and replace any missing or damaged labels. To obtain replacements for
missing or damaged safety labels, contact Agra-GPS.
When operating the machine after installing the CRG, observe the following safety measures:
•Be alert and aware of surroundings.
•Do not operate the CRG system while impaired.
•Always remain in the operator’s position in the machine when the CRG system is engaged.
•Determine and maintain a safe working distance away from other individuals. The operator
is responsible for disabling the CRG system when a safe working distance has been
diminished.
•Ensure the CRG is disabled prior to starting any maintenance work on the machine or parts
of the CRG system.
•Follow all safety instructions from the host machine as well as the John Deere system.
•The CRG must only be used in the field, never on public roads.
Electrical Safety
•Always verify that the power leads are connected to the correct polarity as marked.
Reversing the power leads could cause severe damage to the equipment.
•Verify that all cables and connectors are not in contact with sharp edges or anything that
could cause chafing, as this could result in power shorts and/or other malfunctions.
•Power is supplied to the CRG even when the key is off. Power can be removed in 3
different ways: 1) Remove the connector from the CRG, 2) Remove the fuse supplying
circuit power, or 3) Remove a battery lead while the machine is off.
Risk of Fire
•The circuit supplying 12 volt power for this product requires a fuse. The maximum fuse
rating is 5 amps, and the minimum is 1 amp.
AGRA-GPS Ltd. CRG User Manual
August 2022 Page 1 of 15
Introduction
Congratulations on your purchase of the CRG! The CRG is designed to bridge the communication
between agricultural machinery (of various makes) and a John Deere (JD) display (1800, 2600, 2630,
4240, or 4640). This allows a JD display to create maps in the John Deere format, and also provides
autosteer functionality. The operator uses the JD display to create AB-lines or field documentation,
or to handle any other GPS system input.
The CRG contains a) an RTK-capable GPS receiver, AND b) a full steering controller capable of
steering a non-JD machine with a John Deere display! The specific machine that can be controlled
by the CRG is dependent on the variant that was purchased: for example, a CRG-AGCO can control
a Fendt tractor, but cannot control a Claas tractor. To control a Claas tractor, you would need to
purchase a CRG-CLAAS.
This manual contains information generic to CRG setup and usage. For installation instructions for
your particular machine, please consult the relevant Installation Manual.
NOTICE
This manual is not intended to replace the manuals for the host machine nor the John Deere GPS
system. The operator must read and understand the manuals and instructions of these systems, before
using the CRG.
ISObus Apps
The CRG comes with at least 2 ISObus VT applications (ISO apps) that will be loaded onto the John
Deere monitor. The apps will automatically install themselves into the monitor after the first few
minutes of the initial start-up. On subsequent power-ups the apps will load themselves from monitor
memory much more quickly. The CRG apps include:
–Bridge/steering configurations
–Option to change work recording mode
–Option to change the machine type
–RTK configuration
–NMEA serial output configurations
AGRA-GPS Ltd. CRG User Manual
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Depending on the model of JD monitor, the
CRG ISO apps may be found in different
locations.
On a John Deere Gen-4 monitor the
application will be loaded in the ISObus VT
section on the main page of the display.
On John Deere 1800, 2600, & 2630 the
application will be shown in the side menu of
the John Deere display. The side menu (shown
below) is opened by pressing the button on the
bottom right.
NOTE: John Deere 1800 and 2600 monitors
do not show a loading bar for ISO
applications, while 2630 and 4640 monitors
do.
If the ISO application does not load:
•Try clearing the monitor's memory. On 2630 monitors this can be done in the Message Center
in the side menu. Go to the Cleanup tab, check controllers, then Begin Cleanup. On 4640
monitors this can be done in the info page of the ISObus VT. Navigate to the ISObus VT window
and press the info (i) button at the top of the page, then press Clean Up ISObus VT.
•Do a hard reset of the John Deere monitor (Unplug it, then plug it back in).
•Do a full restart of the machine. Remember, the app may take a few minutes to load.
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Switching Between ISO Apps
When accessing ISObus VT, the first page
viewed may be the CRG-Bridge app. Before
setting up the Bridge parameters, it is
necessary to setup the CRG-Receiver app. To
do this, pull up the app page using the button
circled.
Refer to page 10 for more information on
configuring the Bridge app.
In the image, the top item (yellow) selects the
CRG-Bridge app, and the bottom item (light
grey) switches to the CRG-Receiver app.
AGRA-GPS Ltd. CRG User Manual
August 2022 Page 4 of 15
Configuring the CRG
The main screen of the CRG-
Receiver app is the “CRG Info”
page, as shown.
The minimum initial setup require-
ments include specifying the mount
placement & completing the
calibration procedure (refer to Mount
Settings on page 6).
Refer to the following sections for more information:
MINIMUM SETUP →
SETTINGS
Page 5 ……… General Settings
Page 6 ……… Mount Settings
Page 7 ……… NTRIP Settings
Page 7 ……… Modem Settings
Page 8 DIAGNOSTICS
Page 8 SERIAL PORT
UPDATES
Refer to the CRG Firmware
Update Manual
Use this button to switch between
the CRG app and the Bridge app
AGRA-GPS Ltd. CRG User Manual
August 2022 Page 5 of 15
General Settings
Minutes On After Power Off: Delay for CRG
to power down after machine is turned off.
This will allow GPS satellite tracking to
continue and allows for getting back to work
quickly.
Bridge: Must be enabled to provide auto-
steering on any non-JD machine. Set
disabled if using the CRG as a receiver only.
If using the CRG on a JD machine, the Bridge
ISO app of the CRG is disabled
automatically, even if this selection shows
“Enabled".
Default Correction: Multiband allows the
CRG to use its preferred default correction
algorithms. SBAS restricts the receiver to
WAAS (for North America) or EGNOS (for
Europe).
Modem Type: If the CRG was purchased with an optional cellular modem, the make of the modem
is selected here. The “NTRIP Settings” and “Modem Settings” buttons are invisible if no modem is
selected.
Reset to Defaults: All parameters within the CRG Iso App are reset. The default settings take effect
after the CRG is rebooted.
Reset CRG: The CRG device is rebooted. WARNING: Resetting the CRG while it is engaged
will cause loss of machine control.
AGRA-GPS Ltd. CRG User Manual
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Mount Settings
Height: the height from the ground to the
bottom of the CRG.
Fore/Aft: the horizontal distance from the
turning point to the CRG. For a tractor,
usually the fixed/rear axle. For a combine, the
fixed axle would be the front axle. For an
articulated tractor, this would be the pivot
point. For most tractors, with the CRG
mounted at the front of the cab, the value is
positive because it is in front of the fixed axle.
Mount Direction: the direction of the front of
the CRG. For example, when facing forward
in the driver’s seat, if the CRG connectors are
to the left, the Mount Direction should be
specified as Right. For most machines,
Forward is the correct choice. An exception
would be newer Fendt tractors where the CRG
can be mounted inside the roof panel.
Calibration: the tractor should be parked on a spot that is as level as possible. After initial readings
are taken, you will be required to turn the tractor around (180°) and park it on the same spot. Follow
the on-screen instructions.
AGRA-GPS Ltd. CRG User Manual
August 2022 Page 7 of 15
NTRIP and Modem Settings
There are 3 options for connecting to an
NTRIP caster of your choice:
•You may have purchased the CRG
with an internal cellular modem.
This modem requires a SIM/data
card to be installed.
•If you don’t have a cellular modem,
you may use our Agra-GPS app on
your phone to connect to the CRG
via Bluetooth® and get the RTCM
correction data from an NTRIP
caster. In this case, the IP address
and other details of the NTRIP caster
are specified within the phone app.
•You may connect an external radio modem. Consult with Agra-GPS for options.
If your CRG is equipped with an optional
cellular modem, setup within ISObus VT is
required. The NTRIP settings page allows
you to connect to RTCM correction data via
cellular connection.
The CRG also works without correction data;
however, accuracy is not nearly as good as
with an RTCM correction source.
Refer to the CRG Modem Guide for further
instructions.
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