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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

Содержание MyChron 3 XG

Страница 1: ...a 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...

Страница 2: ...use the USB data download cable and plug it both in the gauge s USB port and in the PC s USB port as explained in Figure 4 Moreover it is reminded to use a 9 15 Volts external power source in order to be able to switch on the gauge CH2 CH1 CH4 CH3 Power IN GEAR Beacon Speed RPM Figure 4 How to connect your MyChron 3 XG to the PC Software Speed direction Lateral accelerometer Once the data logger h...

Страница 3: ...them you have to transmit the configuration to the instrument by pressing the Transmit button It is reminded that in order to transmit the configuration the gauge must be switched on and connected to the PC as shown in Figure 4 4 How to calibrate autocalibrate the sensors Once the configuration has been transmitted to the PC you have to calibrate autocalibrate the sensors The internal lateral acce...

Страница 4: ...ion 1 9 15 V power input 3 GND 2 GND RPM channel pinout Pin Function 1 RPM 150 400 V input coil 2 GND 3 RPM 8 50 V square wave ECU Note when connecting the RPM channel it is reminded to connect either the RPM signal sampled from the coil or the other one sampled from the ECU not both Moreover do not connect the RPM coil signal on the RPM ECU input 3 4 pins female Binder 712 connectors pinout exter...

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