EPA Pass-By Noise

Start Line Offset (m)

Allows the user to set the distance between the reflective strip and the Start Line of the Test Area. As a recommendation, the reflective strip should be located at a distance of 30 m from the Start Line.

Channels

Allows the user to specify the channels to be used for the Microphones, RPM and Throttle. Microphone 1 and RPM channels are mandatory before the test can be run.

Temperature

Allows the user to specify the channel to be used for the Air temperature channel only when using a weather station otherwise it can be left blank. If a channel is selected, a pass/fail column for temperature appears in the results table to ensure during each test run that the ambient air temperature is within the specified range. The default values are 5°C to 40°C.

Reaction Delay

Reaction delay offset in seconds when using the 'WOT Countdown' timer gauge. Some PC’s have latency when displaying this particular gauge so this setting applies a reaction offset to the start of the test. The default value is 0.1 s which is adequate for most PCs.

GPS Start Lines

An alternative method to using the light barrier kit is for customers with an RTK enabled VBOX 3i to set up start lines, either while online to the VBOX or from a previously logged file. The Start line names can be renamed or deleted as required.

​Test Configuration with GPS Start Lines

Once the start lines have been created, Racelogic recommend the saving of test settings. This will allow the user to repeatedly recall these start lines without having to set them individually for each test.
 

 

Since the test can be conducted in both directions, test settings can be modified such that the start on lines can be configured for 1 or 2 lines in the drop down menu.

In order to prevent situations where the start line offset is less than the vehicle front offset to the antenna, the minimum value of the start line offset is 5 m. The default value of the start line offset is 30 m.

​Session Data

By pressing the 'Edit Data' button  next to the name of the file/run or in the ‘Test Setup' ribbon bar, a new window will be displayed whereby the user can add various different pieces of vehicle and test information, such as:-

• Vehicle
  • Vehicle Model
  • Vehicle Number
  • Driver Name
  • Engine Model
  • Engine Number
  • Engine Capacity (required)
  • Exhaust Model
  • Kerb Mass
  • Power
  • Idle RPM
  • Rated Engine RPM (required)

• Measurements
  • Enter the laser light barrier front and rear vehicle offsets (required)
    
• Wheels/Tyres
  • Wheel Dimensions
  • Tyre Make
  • Tyre Dimensions
  • Tyre Model
  • Tyre Pressures
• Test
  • Test Date
  • Test Track
  • Test Facility
  • Comments
• Conditions
  • Weather
  • Temperature
  • Track Temperature
  • Humidity
  • Wind Speed
  • Background Noise
     

When in 'Offline' mode, this information will be saved into the .vbo file meaning that this information will be recalled every time the file is loaded into VBOX Test Suite.

When in 'Online' mode, a newly-created session will be populated with session data from the previous session.

 

Note: The Engine Capacity, Rated Engine RPM and vehicle offsets measurements are mandatory, however the other data is purely optional and has no effect on the test or test result.
 

To save time, it is possible for the user to import and export the session information for use in other sessions.

Once the session information has been completed, it is possible to export the data to a .vbses file. This file will contain all the session information that can then be imported into the open session information field.
 

Before starting a test, please ensure that Vehicle Offset Measurements are entered or imported from a previously saved .vbses file.

Result Columns

 

Along the top of the Test results area are some default columns. These columns are:-

• Run – Indicates which run number the results relate to, with run one being the first run completed. There is also a selection box that, when ticked, includes that run in the graph and into the Average/Max/Min/Standard Deviation calculations. Once selected, a coloured square will appear to indicate which colour this run is displayed as on the graph.
  Note: If you are loading a file offline, all valid runs are ticked automatically.
• Entrance RPM – RPM value at the start of the test, If this value is outside the designated limit, this column will be highlighted red.
• Exit -1m RPM – RPM value at 1 m before the end of the test.
• Exit RPM – RPM value of the end of the test, defined by the value calculated within the Session Data.
• Exit +1m RPM – RPM value at 1 m after the end of the test.
• Exit Dist – Test distance covered.
• Mic1 Max – Maximum Sound Level value of Mic, If this value is outside the designated limit, this column will be highlighted red.

Along with the usual dashboard functionality, the ‘EPA Pass-By Noise’ test has some extra options which can be displayed to the user.

By selecting the 'Add Gauge' button from the dashboard tab, a drop down menu will appear whereby the user can select 'Test' and then the desired parameter to be displayed. On selection, a gauge will be automatically added to the dashboard. Any gauges displaying a result of a test, such as an average or maximum value, will have a 'Result' icon  to the left of the gauge name to indicate that it is either a result of the previous run if viewing live data, or the currently selected run if viewing a saved file.

All Result Column parameters are also available as a gauge.

WOT Countdown

Within the 'Test' parameters, a 'WOT Countdown' gauge can be added which provides a '3 - 2 - 1 - Go' countdown timer visual aid. It activates once the 'Start On' condition has been met and will indicate to start the test once the 'Start Line Offset' distance has been covered.