Aim MyChron 3 XG Technical Documentation

TECHNICAL DOCUMENTATION
Notes: MyChron 3 XG technical documentation, dimensions and pinout

Introduction

MyChron 3 XG represents the new generation of Aim data acquisition systems for car racing.
MyChron 3 XG monitors and displays RPM, 4 fully configurable analog inputs (pressure,
temperature, potentiometers, Lambda sond and Pitot tube speed sensors), speed, current gear
number, lateral G-force and lap (split) times. It also has a backlight, which can be switched on
during night racing
The logger records the following parameters:
Data is stored in a huge 2 Mbytes internal flash memory and may be downloaded to a PC through
an USB cable.
Please, refer to the following drawing to get further information concerning the gauge's display.
Speed unit of measure
RPM graphical bar
Configurable RPM scaling
2nd displayed channel
Temperature unit of measure
1st displayed channel
Figure 1: MyChron 3 XG
•
4 analog inputs: the user may choose the analog inputs among pressure sensors,
temperature sensors (VDO, thermocouples, thermoresistances), potentiometers (linear
and circular), Lambda sond and Pitot tube speed sensors;
•
engine's RPM, sampled either from the ECU (square wave signal) or from the coil;
•
lap and split times;
•
engaged gear number: the gauge is able to sample the gear number either using an "on-
board" gear sensor or calculating them using the speed vs. RPM ratio;
•
1 speed input;
•
lateral G-force: the G-force sensor is mounted inside the "Junction box";
•
logger temperature;
Analog inputs: temperature or pressures
Figure 2: MyChron 3 XG display
01/04/2003 GAUGE
Internal lateral accelerometer
CH1 CH3
CH2 CH4
Gear display
10 fully configurable shift lights
USB port
Technical documentation:
MyChron 3 XG
Speed Power IN
RPM
Beacon GEAR
Low battery warning
Night vision
RPM digital value
Speed
Best lap time
Battery voltage
4 alarm led:
from "AL 1" to "AL 4"
Lap / Split times
MyChron 3 XG 1