Recalibrating the Measuring Tool

If the light-up ring (2) turns red continuously and the metal object indicator (5) lights up continuously, even though there is no metal object near the measuring tool, you can manually recalibrate the measuring tool.

• Ensure that the batteries are not weak or empty.
• Switch the measuring tool off.
• Remove all objects near the measuring tool that could be detected (including watches or metal rings).
  Hold the measuring tool up horizontally so that the rear side of the measuring tool is pointing towards the floor.
• To switch to calibration mode, simultaneously press the on/off button (7) and the audio signal button (6). Press and hold both buttons (for approx. 5–10 s) until the light-up ring (2) flashes red.
• To start recalibration, press and hold the audio signal button (6) (for approx. 5−10 s) until the light-up ring (2) lights up red.
• If the calibration was successful, the measuring tool will start automatically after a few seconds and will be ready for operation again.

Note: If the measuring tool does not start automatically, repeat the recalibration. If the measuring tool does not start, send it to an authorised Bosch after-sales service centre.