GRT Avionics Mini-X EFIS Mode d’emploi
Mini-X EFIS
Installation, Setup, and User Manual
Revision A9
14-January-2020
Mini-X Installation, Setup & User Manual GRT Avionics
Revision A9 2
3133 Madison Ave. SE
Wyoming, MI 49548
(616) 245-7700
www.grtavionics.com
Copyright© 2014
Revision A9 3
GRT Avionics Mini-X Installation, Setup & User Manual
Manual
Revision Date Software
Revision Change Description
A 06-Jun-2014 1 Initial Release
A1 16-Jun-2014 1a Appendix, A.1.5 and A.1.6- Corrected and clarified AHRS and Air Data
Software update instructions.
A2 16-Jul-2014 1b
Added & clarified wiring options for Trig TT21/TT22 remote transponder,
Section 2.5
Added TT22 to list of choices for RS-232 serial ports, Section 2.6
A3
27-Aug-2014
1d
Added information about PFD navigation options (Waypoint Balloons,
Course Ribbons, and Enroute Highway-In-The-Sky), Section 5.9
Updated image of North-Up map presentation with compass rose,
Section 6.4.
Added information about the Synthetic Approach, Section 7.4
A4
29-Aug-2014
1d Fixed typographical errors in Section 4.6 and 4.7.
A5 11-Feb-2015 1d Improved Magnetometer installation and calibration instructions.
A6
24-Sep-2015
1d Added Angle-of-Attack installation and calibration instructions.
A7 23-Feb-2016 2
Backup-Battery Instructions added.
Added setting magnetometer orientation before fine calibration and
validation of magnetometer location.
A8
17-Apr-2017
1d AOA Installation and calibration restored. Magnetometer wiring
updated to show both possible sets of wire colors.
A9
Tuesday
January 14
2020
2Added section covering Graphical Engine Monitoring with GRT
Engine Information System.
Mini-X Manual Revision Notes
Mini-X Installation, Setup & User Manual GRT Avionics
Revision A9 4
Thank you for choosing GRT Avionics!
We hope you enjoy your new avionics system for many years to come.
Warranty & Return Policy
All GRT products include a 2-year warranty starting on the day the instrument is put into service (or
three years after purchase, whichever comes first) against manufacturer defect.
Please contact Tech Support before returning a display unit or component to GRT for repair or
warranty work. Many issues are installation or software-related and can be resolved over the phone,
saving time and expense. Please keep in mind that the minimum bench charge for EFIS units is $100.
All returns for repair or upgrade must be accompanied by a Service Request Form, downloadable
from the GRT website Support section.
Satisfaction Guarantee– If for any reason you are unhappy with your GRT product, you may return
it for a refund anytime during the first 60 days you own it. Some restrictions apply. Please call GRT
Tech Support before returning any system or component.
Technical Support
Our tech support staff has many years of real-world experience installing, flying and
troubleshooting GRT equipment in many different types of aircraft. We are here to make sure your
project succeeds.
Tech Support Hours
Monday-Friday 9:00 AM-12:00 PM and 1:00 PM -4:00 PM Eastern Time
(616) 245-7700 (EFIS Support phone menu option) or [email protected]
24-Hour Tech Support: The GRT Online Forum
Many questions may already have answers posted in our Online User Forum. Join today for free!
www.grtavionics.com/forum
Mini-X Installation, Setup & User Manual GRT Avionics
Revision A9 5
Contents
Mini-X EFIS.................................................................................................................1
Warranty & Return Policy...................................................................................................................4
1.1 About the Mini-X........................................................................................................................8
1.2 Tools & References for Installation............................................................................................8
1.3 Mini System Requirements........................................................................................................8
1.4 AHRS Specifications and Limitations........................................................................................9
1.5 Basic Controls of the Mini........................................................................................................11
2.1 Mini-X Connector Definition....................................................................................................15
2.2 General Wiring Guidelines.....................................................................................................17
2.3 Power Connections..................................................................................................................17
2.4 Autopilot Source Switch (Optional).........................................................................................18
2.5 Magnetometer Wiring (Optional/Recommended) .............................................................18
2.6 Inter-Display Communication................................................................................................19
2.7 Trig TT21/TT22 Transponder Interface......................................................................................20
2.8 General Serial Port Wiring Information...................................................................................21
3.1 Placement of the Mini on the Instrument Panel ...................................................................22
3.2 Mounting Hardware................................................................................................................22
3.3 Pitot/Static Connections..........................................................................................................22
3.4 Cooling Considerations...........................................................................................................22
3.5 Remote Magnetometer Installation (Optional) ....................................................................23
4.1 Boot-Up Check.........................................................................................................................24
Mini-X Installation, Setup & User Manual GRT Avionics
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4.2 Explore the Set Menu Pages...................................................................................................24
4.3 Set Up Your General Preferences...........................................................................................25
4.4 Set Instrument Orientation.......................................................................................................26
4.5 External Magnetometer Location Validation .......................................................................27
4.6 Set Final Magnetometer and Instrument Orientation...........................................................28
4.7 Fine Magnetometer Calibration Procedure..........................................................................28
4.8 Altimeter Calibration...............................................................................................................32
4.9 Full Altimeter Calibration – Using Air Data Test Set................................................................33
4.10 Airspeed and Wind Calibration............................................................................................35
4.11 Angle of Attack (AOA) Installation and Calibration ...........................................................37
5.1 Primary Flight Display Overview.............................................................................................39
5.2 Airspeed Tape..........................................................................................................................40
5.3 Altimeter Tape...........................................................................................................................41
5.4 Vertical Speed Indicator.........................................................................................................43
5.5 Track/Heading Indicator..........................................................................................................43
5.6 Attitude Indicator/Artificial Horizon........................................................................................45
5.7 Flight Path Marker....................................................................................................................47
5.8 G-Meter.....................................................................................................................................47
5.9.7 Enroute HITS...........................................................................................................................52
6.1 Moving Map Overview............................................................................................................53
6.2 Moving Map Database ..........................................................................................................54
6.3 Map Screen Setup & Customization- Setup Menu................................................................54
Mini-X Installation, Setup & User Manual GRT Avionics
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6.4 In-Flight Map Setup..................................................................................................................56
6.5 Map Selection Tool..................................................................................................................58
7.1 GPS CDI Bar..............................................................................................................................59
7.2 Flight Planning with the Mini....................................................................................................59
7.3 Airport/Facilities Information & Radio Tuning.........................................................................65
7.4 Synthetic Approach (SAP)........................................................................................................66
8.1 Autopilot....................................................................................................................................68
8.2 Trig TT22 Transponder..............................................................................................................69
8.3 Graphical Engine Monitoring with the EIS...............................................................................71
8.4 Data Recording .......................................................................................................................85
A.1 Updating Mini Software...........................................................................................................91
A.2 Backup Battery Operation......................................................................................................94
Mini-X Installation, Setup & User Manual GRT Avionics
Revision A9 8
Section 1: Introduction
1.1 About the Mini-X
We designed the Mini with two main goals in mind: A small, lightweight, economical VFR EFIS
system for LSA and light kitplanes, and an affordable, high-quality backup to larger EFIS systems
for IFR operations. The Mini utilizes the same pilot interface as the popular Horizon and Sport
series; If you already use GRT avionics for your primary flight display, you will not have to remember
a different brand’s “buttonology” in an IFR emergency. The Mini has a built-in GPS for navigation,
so you will always know where you are.
In addition to the basic backup flight instruments, all models of the Mini can also serve as a serial
altitude encoder for any modern transponder, and serve as a control head for a remote Trig TT22
transponder. To top it off, the brilliant 1200-nit, high-resolution display shared by all three Mini
models ensures great visibility in all lighting conditions.
1.2 Tools & References for Installation
In addition to basic mechanical hand tools, a D-sub pin crimper is required in most installations.
A basic 4-way indent crimper is available from SteinAir for less than $35. We supply a few loose
male and female pins with your wiring harness, and we have them available for sale if you need
more.
If you are new to electrical systems and wiring, we highly recommend reading
by Bob Nuckolls. This book has been around for almost 30 years and covers everything
a homebuilder needs to know about how electrical systems work, how to design them, and how
to build them. There are also numerous online video tutorials by EAA, SteinAir and others in the
experimental aircraft community on wiring technique and electrical system design.
1.3 Mini System Requirements
The Mini utilizes the following systems for operation:
�Aircraft Power (12- or 28-volt system) - 0.25 Amp current draw at full brightness
�Pitot/static connection for flight instrumentation
�Built-in GPS with a remote “puck” antenna which must be within view of the sky at all times.
�Optional remote magnetometer is required for magnetic heading information and AHRS
independent of GPS track– see Section 1.4 for more information.
Revision A9 9
GRT Avionics Mini-X Installation, Setup & User Manual
1.4 AHRS Specifications and Limitations
�Maximum Angular Rate: 250 deg/sec
�Maximum G-Limit : 4G for unlimited time, 10G for up to 20 seconds. G-limit affects accuracy of
the readout, but exceeding it will not damage the instrument.
�Ambient Temperature Range for full accuracy: -10°F to +150°F
�Airspeed Range : 30-335 mph IAS (stock AHRS) or 50-600 mph IAS (High-Airspeed version)
�Altimeter Range : -2000 to +40,000 feet
�Magnetometer Type: Internal (Mini-B and stock Mini-X) or External remote (Mini-AP and optional
for Mini-X). When the External magnetometer is installed, it overrides the Internal, which is then
used only in the unlikely event of failure of the remote unit.
1.4.1 Mini-X AHRS and Loss of GPS Data
Normal Operation
Attitude data will be full accuracy when valid external magnetometer data or GPS ground track
data is available. If no valid external magnetometer is available, and the GPS ground track data is
lost (because the airplane is moving less than 4 mph, or the GPS is not able to provide position
data), and the AHRS will attempt to use its internal magnetometer. If the internal magnetometer
is too inaccurate due to magnetic disturbances near the instrument, the ground track display on
the PFD screen will show dashes. The AHRS will provide full accuracy attitude information for at
least 5 minutes.
CAUTION: If the EFIS is unable to provide any heading or track data (the heading/ground track
display on the PFD screen is shown as dashes) for extended periods of time (more than 5 minutes)
the attitude data could become less accurate.
Mini-X Installation, Setup & User Manual GRT Avionics
Revision A9 10
Figure 1-1: Mini Dimensional Drawing (all models)
GRT Mini
01-Mar-2014
Notes:
�Cutout dimensions 4.15” x 3.30”
�Unit is centered within the cutout.
�Mounting screws are #4
�Mounting bolt pattern is centered on
bezel outline.
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