Chapter 4. Configuring the Display System
STACK ST8130 Series Road Car Display Systems
24
Users Guide
3.
If you know the number of pulses generated for one mile (UK/EU
version only):
1609344
÷
pulses per mile = 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.
Example:
Pulses per mile: 5000
Circumference = 1609344
÷
5000 = 321.9mm
Double the two values:
Wheel Cir (mm) = 644mm
W.S.Pulses/Rev = 2
4.
If the pulses are coming from the wheel, i.e. you know the number
pulses for each revolution of the wheel. Enter the actual
circumference and the number of pulses per revolution (see the
following section)
Calculations for the ST8131 (ST670 Wheel Sensor)
Calculations for the ST8131 (ST670 Wheel Sensor)
You must supply a value for the wheel circumference that you obtain
from one of the following calculations:
1.
If the sensor is mounted on a wheel, set this value to the
circumference of the wheel and set the number of pulses per
revolution to number of targets on the wheel.
Note: If the circumference is less than 500mm or 20.0 inches, double
both this value and the number of pulses per revolution. This is to
make the calculated speed and distance as accurate as possible.
