TECHNICAL DOCUMENTATION
01/04/2003
GAUGE
Notes: MyChron 3 XG technical documentation, dimensions and pinout
MyChron 3 XG
Internal lateral accelerometer
CH2
CH1
CH4
CH3
Power IN
GEAR
Beacon
Speed
RPM
Figure 1:
MyChron 3 XG
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:
•
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;
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.
Analog inputs: temperature or pressures
10 fully configurable shift lights
Battery voltage
Best lap time
Speed
RPM digital value
Night vision
Low battery warning
2nd displayed channel
Speed unit of measure
Configurable RPM scaling
RPM graphical bar
Gear display
1st displayed channel
Temperature unit of measure
4 alarm led:
Lap / Split times
from "AL 1" to "AL 4"
USB port
Figure 2:
MyChron 3 XG display
Technical documentation:
MyChron 3 XG
1
