A reference lap is required for Performance Box Touch to calculate Delta-T and Delta-V lap timing values within the Lap Timing Mode.
Creating a Reference Lap
Performance Box Touch will automatically begin to create a reference lap once the Start/Finish line is crossed or movement is detected in Standing Start mode, and will complete when the Start/Finish line is crossed again or the separate Finish Line is crossed.
Requirements for creating a reference lap:
- Lap is longer than 20 seconds.
- Lap is greater than 100 m.
- Maximum speed achieved is greater than 40 km/h.
- Lap is over half the stored reference lap distance.
- Lap time does not exceed 43'40.00".
It is also possible to choose to ignore short laps from creating the reference lap by entering a Minimum Lap Time within the Settings.
When a reference lap is being created, a 'Creating a Reference Lap' message is displayed on the Main Lap Timing Screen within the Delta-T section and the reference lap section will show a rolling lap time. The LEDs will also illuminate blue during the creation process.
The reference lap will update if a faster lap is achieved or if the lap distance is more than double the stored reference lap, unless the Reference Lap has been Fixed.
The reference lap will be retained after each power cycle.
Fix the Reference Lap
It is possible to fix the current reference lap, meaning that the stored reference lap will not update if a faster lap is achieved. If there is no stored reference lap, the next complete lap will be used as the fixed reference lap.
There are two methods available to fix the Reference Lap:
- Enable the Fix Reference Lap option within the lap Lap Timing Settings menu.
- Triple tap on the main Main Lap Timing Screen.
Once initiated, a cancel timeout screen will display, allowing you to cancel the fixing within 5 seconds by pressing the screen.
When a reference lap has been fixed, a padlock icon will show to the right of the reference lap on the Main Lap Timing Screen. Unfix a reference lap by using the same methods.
Save the Reference Lap
If a reference lap has been created, you can save the lap for future use by pressing the Save Reference Lap option within the lap Lap Timing Settings menu (as long as the unit is not logging and the vehicle is not moving).
If an SD card is detected, it will be saved as a file named lap.ref within a REF LAPS folder on the SD card. A save success screen will briefly display to show that it was saved successfully. If a reference lap file already exists on the SD card, Performance Box Touch will display an overwrite cancel screen, which gives you 5 seconds to cancel the overwrite by pressing the screen.
Load a Reference Lap
You can load a previously saved or provided reference lap by pressing the Load Reference Lap option within the lap Lap Timing Settings menu (as long as the unit is not logging and the vehicle is not moving).
If an SD card is detected, the unit will display all .ref files located within the REF LAPS folder on the SD card. Select a file and then press the Confirm Button on the bottom right of the screen, or press the Cancel Button on the bottom left of the screen to return the Settings screen without saving.
If confirmed, a load success screen will briefly display to show that it was loaded successfully.
If there are splits stored within the file, these will also be uploaded to the unit, up to a maximum of 10 gates/splits.
Note: When a new reference lap is loaded, the Start/Finish gate stored within the .ref lap will be applied as the active Lap timing gate if it is different to the currently loaded gate. If the gates are changed, all existing lap timing values will be cleared and the new lap timing gates will be used.