ADE WS 1908 Mode D'emploi page 52

‚ Calibrate the device via the USB interface
and do not disconnect it during calibration.
‚ Calibration should be carried out in a clean
and well-ventilated area.
Procedure:
1. Press and hold down the
display shows "CALI".
2. To start the process, press .
The calibration process lasts approx. 2 hours.
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button. The