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6.6 Zero calibration
The internal pressure sensor should be calibrated once daily before use. Zero calibration is
used for this purpose. The sub-item "Zero calibration" contains the following options:
-
Type
-
Start 0kPa
The adjustment type is factory set to "one point" and cannot be changed in v1.00.
Perform one-point zero calibration:
First, please make sure that the control line is de-energised. The easiest way to achieve this
is by decoupling the two control lines (11) and (14) and keeping them at ambient pressure.
Secure the vehicle against "rolling away" beforehand! Select the sub-item "Start 0kPa".
Zero calibration is performed via "Enter" (3). If the calibration is successful, the message "Zero
calibration successful!" appears on the display, which must be acknowledged with "OK" (3).
6.7 Pressure adjustment in the supply line
To provide a defined air pressure in the supply line (17), the BTU is equipped with an adjustable
precision pressure regulator. This regulator can be used to set the required supply pressure
for supplying the test vehicle. A test connection (18) for measuring and recording by means of
external devices is available.
Additional information about the precision pressure regulator:
The system is set up to provide the precision pressure regulator with its own air consumption.
This means that some noise is audible at the vent outlet, depending on the set pressure value.
6.8 Measuring point "control pressure"
Via the test connection (23), the pressure in the control line is available for measurement and
recording using external devices.
6.9 Settings
In the settings you can define the system start-up state of the REC pin (VBox recording) to the
VBox. You can choose between the following states:
Rec ON: The REC pin is open at system start-up. The VBox is recording.
Rec OFF: The REC pin is closed at system start-up. The VBox does not record.
Furthermore, the language can be changed. The following languages are available:
DE (German)
EN (English)
To change an option, the desired point is selected using "arrow keys". Press "Enter" to change
the option. The changes are saved only when you exit the settings via "Exit".
Additionally, the real-time clock is displayed.
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