STACK ST8130 Series Road Car Display Systems
Chapter 4. Configuring the Display System
Users Guide
23
Wheel Pulses and Circumferences
Wheel Pulses and Circumferences
Calculations for the ST8130 (ST492 Pulse Amplifier)
Calculations for the ST8130 (ST492 Pulse Amplifier)
You must supply a value for the wheel circumference that you obtain
from one of the following calculations:
1.
If you know the number of pulses generated for one mile (US version
only):
63360
÷
pulses per mile = wheel circumference
(Set the number of pulses per rev to 1.)
Note: If the resulting circumference is less than 20.0 inches, double
this value and set the number of pulses per rev to 2. This is to make
the calculated speed and distance as accurate as possible.
Example:
Pulses per mile: 5000
Circumference = 63360
÷
5000 = 12.67 inches
Double the two values:
Wheel Cir (ins) = 25.3 inches
W.S. Pulses/Rev = 2
2.
If you know the number of pulses generated for one kilometre
(UK/EU version only):
1000000
÷
pulses per km = wheel circumference
(Set the number of pulses per rev to 1.)
Note: If the resulting circumference is less than 500mm, double this
value and set the number of pulses per rev to 2. This is to make the
calculated speed and distance as accurate as possible.
