28 |
P a g e
6.9.2 Vehicle Speed Calibration
Default Settings
The "SPD CAL" plug is pre-programmed for use over 10 meters. This value can be changed using the FM
Dealer Utility software. During calibration, the LED will flash as speed pulses are received, and the unit will
beep in periods of one second. When the plug is removed, the unit will beep three times.
Disarm the system using the blue plug
Drive to the beginning of a measured 10 meter distance.
Insert the violet plug labelled "SPD CAL" into the code plug socket (the LED should flash once for
every 50 pulses received, and the buzzer should sound in a one second on, one second off cycle).
Drive the measured 10 meters.
Remove the violet plug from the vehicle interface.
The FM 3617i/FM 3717i/FM 3817i unit is now calibrated with the correct distance to pulse ratio.
Custom Settings
The “SPD CAL” plug can be programmed with custom calibration values.
Measure the exact distance to pulse ratio using the appropriate measurement tools
Set the speed calibration plug “SPD CAL” to the correct distance to pulse ratio using the FM
Dealer Utility software.
Disarm the system using the blue driver plug and turn the ignition on.
Insert the calibration plug into the code plug socket.
The unit will beep three times indicating that it has been calibrated successfully.
6.9.3 Speed and RPM Sensitivity calibration
The blue driver plug can be programmed as a Sensitivity Calibration Plug for adjusting the sensitivity of the
Speed and RPM input lines.The sensitivity setting cannot be read back from the OBC unit.
Default Settings
The default is set to Average Sensitivity, which should be compatible with a wide variety of signal sources.
The unit powers up with the last programmed setting.
Adjusting the Settings
The settings can be changed using the FM Dealer Utility software:
Select Code Plug->Format Plug->Calibration Plug->Speed & RPM Sensitivity.
Select which to change: Speed or RPM, or both. The unselected value will remain unchanged.
Select the sensitivity level:
o
Less Sensitive for large thresholds, requiring large amplitude signals to be detected, and
o
More Sensitive for small thresholds, requiring small amplitude signals to be detected.
Setting the sensitivity too high can cause erroneous reading of noisy signals embedded in the
required signal.
Setting the sensitivity too low may cause the required signal to be read intermittently, or not at all.
The recommended setting is on average. Adjust if the obtained readings during a calibration
and/or verification trip appear random (noisy).
