Starcom Systems Helios User's Manual Manual page 132

Helios Users Guide
Click Send to send the parameters to the unit.
Accumulating data and performing calculations
Drive the car for some distance. The unit will count a certain amount of pulses.
Check the mileage reading in the car. Take this number and divide it by the
actual number of kilometers that you've driven. For example, let's say that the
mileage in the car was shown as 125,000, and you've driven 50 km.
125,000 ÷ 50= 2,500
The result (in this case 2,500) will be your new Pulses per KM value.
Final settings
After this, go back to Installer > Helios parameters > General. Read the data
from the unit and change the following parameters:
Pulses Per KM: The value that you've calculated (for example 2,500).
Mileage: Actual mileage reading that you see in the vehicle.
Click Send to send the new parameters to the unit.
From that point on, the unit will show accurate mileage readings.
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