Memotec mychron 3 User Manual page 29

Spark for This option represents the number of spark signals for every
Revs engine revolution. A two-stroke engine has one spark signal per
revolution, while a four-stroke engine has a spark every two
engine revolutions.
To set the Spark for Revs, after having entered the
CONFIGURATION MODE, push MENU/<< till when you don't
see
Then push MEM to enter EDIT MODE and use buttons
MENU/<< or >> to scroll between three standard values: x1, x2
and /2. For a two-stroke, one cylinder engine, the RPM ratio is
x1.
Press button MEM to save the changes or button VIEW to
discard the changes.
Temperature This function sets the temperature's measure unit; the user can
measure unit choose between Celsius [°C] or Fahrenheit [°F] degrees.
To run this function, after having entered the CONFIGURATION
MODE, push MENU/<< till when you don't see
Then push MEM to enter EDIT MODE and use button
MENU/<< till you don't see the proper Temperature unit of
measure, and confirm it pushing MEM. Press button VIEW to
discard the changes.
The symbols °C or °F will appear on the left of the display.
SPARK FOR REVS
FAHRENHEIT/CELSIUS
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