STS400™ INSTALLATION MANUAL
30
2
In some cases the system can work with only one photocell.
If the minimum tire height (H
min
) is greater than the FOV
v
/2 at the maximum distance, then
only a single presence sensor is required and it must be mounted at the mid point of the field
of view as shown in the figure below:
Top Reading Station with Single Presence Sensor
NOTE:
This configuration requires modifying the Master default Reading
Phase OFF parameter to External Trigger Trailing Edge, Complete Read.
PS1
max distance
H
min
= minimum tire height (lowest profile tire)
W
min
= minimum tire width (narrowest tire)
PS1 = Reading Phase ON/OFF Photocell
FOV
v
@ max dist
H
min
Tire Height
Tire Width
W
min
