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AX22 / Operation

Operating the AX22

Description of the plug/connections/lights etc on the AX22


Select Button

This is the "Select" button. In menu modes this buttons "Selects" the current mode. When setting values this button sets or enters the value.

Up Button

This is the "Up" button. When navigating the menus this moves up, when setting values this increases the value. Holding the button when setting a value increases the value in steps of 10.

Down Button

This is the "Down" button. When navigating the menu this moves down, when setting values this decreases the value. Holding the button when setting a value decreases the value in steps of 10. In continuous timing mode, the Down button is used to add track markers to the current run.

LCD display

20x2 character LED backlit LCD display, display's current AX22 status and results.

Compact Flash Slot

This is the slot for the compact flash card. There are more details here.


Serial Port

This single connector actually connects to 2 serial ports. The first port allows access to the AX22 processor for upgrading the internal firmware and streaming data. The second serial port allows direct access to the GPS module for either updating it's firmware or monitoring it's output directly - either for the purposes of checking the GPS functionality or for 3rd party applications e.g. navigation software.

+12v Power

ESSENTIAL! This is the power supply for the AX22, it needs 10v-15v and about 140mA minimum. Details here.

Lap Beacon

This input can be used with our "yet to be released" lap beacon product for specialist applications.

RPM input

This is the "low level" rpm input that triggers about 5v - this MUST NOT be connected to the ignition coil. Details here.


This is connected directly to the power supply and is intended to power external sensors, for example the lap beacon.

+12v Output

This is connected directly to the power supply and is intended to power external sensors. It can also be used as a power input.

GPS rf +3.3v

GPS antenna connection (gold SMA type). This feeds 3.3v out to the active GPS antenna and takes in the GPS rf signal.

"Warning:" To avoid any possible damage to the car paintwork, please take care when mounting magnetic GPS antennas. In particular make sure that there are no dust or grit under the antenna. In some cases it maybe required to add additional protection to the paintwork prior to mounting the antenna to avoid damage.

Sampling Data with the AX22

If used you are using a GPS antenna, connect it to the rear of the AX22. Once the GPS has been connected, connect the AX22 to a valid power supply.

Quick Start Guide

This section very briefly describes how to use the performance meter to do a timed run from 0-60mph. Please note that the power measurements will be inaccurate until the vehicle settings have been set. Also note that this is a very simple example of what the AX22 is capable of and is just intended to get you up and running. You can also follow this guide to test the unit. Please make sure you are performing this in a safe area, preferably a Drag Strip.

  • Attach performance meter to the car.
  • To turn the unit on press the select button. Race Technology will appear briefly before entering the main menu.
  • Press the up or down button until "Acceleration Timing" is displayed.
  • Press the select button.
  • Press the up or down button until "Time Between Speeds" is displayed.
  • With the car stationary, press select. Wait until the display changes to:
Ready to Start
0.00g 0.10g
  • Accelerate past 60mph.
  • Once past 60mph, the display will show the time taken to travel between 0 and 60mph, for example:
0.0 - 60.0mph
6.46s 370ft
  • After pressing select you will then be asked if you wish to store the data, pressing select again will return you to the main menu without storing the data.
  • Important notes about compact flash is here.
Page last modified on July 18, 2016, at 02:04 PM