AiM MyChron4 660 - Manual (Page 22)

MyChron4 660
User Manual
Release 1.03
www.aim-sportline.com 21
Speed Setup function sets these parameters:
Wheel circumference: this function allows to set the wheel
circumference in inches. This parameter is fundamental to
correlate the wheel angular speed and the dragster speed.
To run this function select ‘Speed Setup’ and press MEM/OK.
Push MEM/OK to enter edit mode: use menu/<< or >>/OFF
to increase/decrease wheel circumference (¼” steps).
When the correct circumference value has been set, press
MEM/OK to save or ON/VIEW to quit without saving.
Drive gear (pinion) teeth number: select the second line;
push MEM/OK to enter edit mode: use menu/<< or >>/OFF
to increase/decrease teeth number.
The pinion teeth number value can be set in a range included
between a minimum value of 5 and a maximum value of 49.
When the correct number of teeth has been set, press
MEM/OK to save or ON/VIEW to quit without saving.
Driven gear (crown) teeth number: select the third line,
push MEM/OK to enter edit mode: use MENU/<< or >>/OFF
to increase or decrease the number of teeth.
The crown teeth number value can be set in a range between
a minimum value of 5 and a maximum value of 199. Once
set, press MEM/OK to save or ON/VIEW to quit.
Speed Setup