Errors – Causes and Corrective Measures

Cause

Remedy

No measurement possible, both object centre indicators (1) are flashing alternately and …

… the metal object indicator (5) and the live wire indicator (4) are not lighting up.

Measurements are impaired by electric, magnetic or electromagnetic fields (such as mobile phones, laptops or tablets near the measuring tool).

If possible, deactivate all tools whose radiation could interfere with the measurement and switch off the corresponding functions or tools.

… the metal object indicator (5) is flashing.

The measuring tool is outside of the operating temperature range, or has been subjected to large fluctuations in temperature.

Switch the measuring tool off and allow it to adjust to the ambient temperature before switching it back on. It is only possible to take exact measurements if the temperature inside the measuring tool remains constant.

… the metal object indicator (5) and the live wire indicator (4) are flashing.

The measuring tool has developed a fault and is no longer functional.

Send the measuring tool to an authorised Bosch after-sales service centre.

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.

The factory calibration is no longer valid (e.g. if the measuring tool falls from great height).

Manually recalibrate the measuring tool see Recalibrating the Measuring Tool.

The light-up ring (2) does not light up when it is positioned on the base material.

The surface cannot be detected because the sensor area (11) is dirty.

Clean the measuring tool with a soft, dry cloth and re-start the measurement.

Contact with the wall or surface may not be detected due to particular wall properties (e.g. a very dark surface).

Position the measuring tool on the surface. For manual wall detection, press and hold the audio signal button (6) until the light-up ring (2) lights up (for approx. 5 s) and an audio signal sounds. Then perform a measurement as usual.
Note: Before taking the next measurement on a different surface, you must reset the manual wall detection. To do this, switch the measuring tool off and on again.