AiM MyChron3 XG Log - Manual (Page 65)

• Number of pulses per wheel revolution: this function allows the user to
set the number of pulses per wheel revolution (i.e. the phonic wheel
teeth number), in order to measure the wheel revolution speed. When
the sensor passes by a gear tooth, it generates an electric pulse if the
phonic wheel is made up of just one tooth, the instrument will measure
one impulse per lap, while, if it is made up of more than one tooth, the
number of pulses per lap will be greater than one.
• Configuring the Shift light led: in the window’s middle part it is possible to
set 5 RPM values, each one corresponding to a coloured led. The five led
progressively turn on in order to indicate the pilot to shift gear.
To set the proper RPM value, you have to modify the values in the
different boxes.
The 10 led are so coloured: the first two on the left and the first two on the
right are green coloured, the middle ones are orange coloured and the
last four are red. When the engine reaches the RPM value set in the 5
th
box, all the five led start blinking, informing the pilot to change gear.
If a value is set to 0, the corresponding led will be disabled.
• Number of pulses per engine revolution: this option represents the
number of pulses, acquired from the coil or from the ECU, per engine
revolution. The user may choose the multiply factor among these values:
/1, /2, /3, /4, /6 and *2. For instance, the correct value for a 4 strokes 4
cylinders engine is /2.
• Maximum RPM value: this option allows the user to set the Maximum
RPM value acquired by the instrument.
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