The Acceleration Mode allows you to perform acceleration tests using pre-defined configurations, or using your own specified values. It is accessed by pressing the Mode Button at the bottom of the screen and selecting Accel.
The last selected Acceleration test will be displayed after each power cycle. It is possible to choose from either Speed or Distance parameters to start and end the test. Test results displayed on the screen of the VBOX Touch will remain on screen at the end of the test until the next start condition is met.
Speed units used are dependent on what is selected within the General Settings area.
Note: If the start condition is 0 km/h, VBOX Touch will use the Smoothed Speed Value to reset the test to avoid a test incorrectly resetting within noisy satellite reception areas.
Accel Mode Overview
The Acceleration screen displays current/completed test information.
The screen is split in two halves:
- Left hand side: This includes a live speed display which always show the current speed of the vehicle, irrespective of any test start or end conditions. If the vehicle is traveling less than 0.5 km/h or satellite lock is lost, the value will display as 000.0.
- Right hand side: This contains test information: time taken, run number, distance travelled, maximum speed achieved (Vmax), maximum acceleration achieved (g) and height difference. These values will start to populate once the start condition of the test is met. When the end condition is met, they will remain on screen until the start condition is met again. A test can be reset by pressing the Reset button at the bottom of the screen.
Selecting an Accel Test
An Accel Test can be chosen by pressing the Settings Button on the bottom left of the screen. Preset and custom test options are then available on the left hand side of the presented screen.
The currently selected test is highlighted on the screen and will be remembered for future use, even if another mode is chosen.
The VBOX Touch is supplied preset with 7 speed and 4 distance Accel tests, press a test to confirm. The 0 – 60 test is selected by default.
|Speed Tests||Distance Tests|
When a test is selected, the name will be displayed at the top right of the main Accel Mode screen.
You can choose your own test start and end conditions by pressing the Custom Test button on the bottom right of the test selection area.
Select the Test Type button to choose between Speed, Distance or 0-Speed-0 (e.g. 0 – 100 – 0). Parameters displayed will depend on the test chosen.
Custom Speed Test Parameters
Custom Distance Test Parameters
Custom 0-Speed-0 Test Parameters
|Speed||Start Speed (km/h or mph)||End Speed (km/h or mph)|
|Distance||Start Speed (km/h or mph)||End Distance (m or ft)|
|0-Speed-0||Target Speed (km/h or mph)|
You can then define the start and end conditions by pressing the corresponding buttons and using the keypad presented.
Start Speed Keypad Example
To save the value inputted, 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 Custom Test screen without saving.
- The maximum input value for speed is 999.9 and 9999 for distance.
- The minimum target value for a 0-Speed-0 test is 5 km/h/ 3.1 mph.
- Speed can be entered up to 1 decimal place.
To save the Custom Test, press the Confirm Button on the bottom right of the screen, or press the Cancel Button on the bottom left of the screen to go back to the Accel Mode screen without saving.
The name of the selected test is displayed at the top right of the main Accel Mode screen. The last defined Custom Test will be remembered for future use, even if a Preset Test or another mode is chosen.
The Accel Mode settings screen can be accessed by selecting the Settings Button on the bottom left of the screen. It enables you to choose the test parameters and also includes other test options. Settings can be changed by pressing on the corresponding button next to an option.
To return to the main screen, select the Exit Button on the bottom left.
Alert at End/Target
By default, an audible and visual alert signals when either the test end criteria, or the target speed is met within a 0-Speed-0 test. The VBOX Touch will beep and the 4 LEDs across the top of the device will flash green for 0.5 s. Tap the button to disable.
One Foot Rollout
If enabled, the test will not commence until 1 ft or 0.305 m distance has been covered. More information on one foot rollout can be found here.
If enabled, VBOX Touch will apply a DB Scanner slope correction method to speed to speed or speed to distance acceleration test results presented on the screen.
Selecting the Screenshot Button will save a full image of what is shown on screen to the inserted SD card. If the screenshot has been saved successfully, the LEDs will illuminate yellow in sequence from left to right to display the progress of writing to the SD card. When screen capture is complete, VBOX Touch will emit an audible confirmation notification. If the screenshot has been saved unsuccessfully, for example no SD card is inserted or the card is full, the SD Card Icon at the top of the screen will flash 3 times and VBOX Touch will emit an audible error notification.
A captured image is saved as a 1.5 MB bitmap image, orientated at 90° to the original screen image, with the prefix 'screenshot'.
IMPORTANT – NEVER remove the SD card when a screenshot is being taken, it could cause the unit to crash!
A history of the test results can be viewed by selecting the Results Button at the bottom of the screen.
Test results will display until a new test type is chosen or the Reset Button is pressed.
Sample results screen
Tests will be displayed in chronological order and the fastest will be highlighted in green. To scroll through the results, use the scroll bar on the right hand of the screen.
Each new session will have a separate header, displaying the time and date for the first completed test in that session.
- Test type
- Time of first completed run in session
- Date of first completed run in session
- Test run number
- Test completion time
- Test completion distance (km/h or mph)
- Maximum speed achieved during test run (km/h or mph)
- Maximum acceleration achieved during test run (g)
- Altitude difference between start of test and end of test (m or ft)
It is possible take a screenshot of the test history by pressing the Screenshot Button .
To return to the main screen, select the Exit Button on the bottom left of the screen.
IMPORTANT - Up to a maximum of 127 tests will be displayed in chronological order, however if more tests have been completed, they will still be recorded on the SD card. Once the limit has been reached, a warning message will be briefly shown, advising that further tests will not be saved to the Test History. The message will show again if the unit is power cycled. A 'TEST HISTORY FULL' notification will also be shown beneath the Live Speed display. To view new test history results, press the Reset Button.
You can also save the results as a .txt or .csv file (dependent on the option selected) to the SD card by selecting the Save Button on the bottom of the screen. When pressed, the unit will emit an audible confirmation notification. If the results have been saved unsuccessfully, for example no SD card is inserted or the card is full, the button will flash 3 times and VBOX Touch will emit an audible error notification.
If saved successfully, the file name will include the test type, the date and also the time, taken from the first completed run in that session. Along with the test history information described above, the results file also incudes average acceleration information, as well as the latitude and longitude position (in degrees and decimal degrees format) added to the session header.
Selecting the Reset Button on the bottom right of the screen will reset all test results shown on the current screen. When pressed, the LEDs will briefly flash green twice and the unit will emit an audible confirmation notification.