Calibrating the NavVis M6

After you have powered up your device, you must calibrate it before you start scanning.

Note: Before starting calibration, make sure that the device is located at the desired start location and that no people are in the area.

Procedure

1. Tap Start Mapping to open the calibration wizard.

2. Specify a name for your Dataset.

3. Enter your geographic location.

4. Perform accelerometer calibration.

5. Perform magnetometer calibration.

6. Start scanning.

Geographic Location

You must select the geographic location of the Site to be scanned to compensate for the magnetic field of the Earth. A rough approximation is enough.

Select the country where you are located from the drop-down list and the city closest to your location.

Calibrating the Accelerometer

Accelerometer calibration is a mandatory step. If you cancel it, you cannot scan.

Users may be prompted to repeat accelerometer calibration if required for high data quality. However, if recalibration continues to fail, skip this step if necessary. This will result in slightly less accurate data.

Do not move the device during this procedure. If the device is moved during this step, Point cloud quality may be significantly reduced.

1. Position the device on level ground. Do not move the device during this procedure.

2. Tap Start Calibration.

3. Wait for the progress bar to reach 100%. This should take about 20 seconds.

Calibrating the Magnetometer

Calibrating the magnetometer ensures precise magnetic field readings.

Note: The magnetometer calibration only needs to be performed once a day. It is especially recommended if the device has not been used for a while or has been transported. If you do not need precise magnetic field readings for your site, you can skip this procedure without affecting the quality of the dataset.

1. Before you begin, prevent interference by ensuring that the device is not located near electromagnetic fields or metallic objects.

2. Tap Start Calibration.

3. Rotate the mobile mapping system slowly around its axis until both circles are outlined in blue. Keep the center of rotation close to the body of the device.

Magnetometer calibration can fail if rotation is not smooth enough, if it is performed too quickly, or if the rotational axis is too far from the body of the device. If it fails, you can retry until it is successful (recommended), or skip the procedure.

Recalibrating

If you have switched off your device, you will be automatically prompted to perform calibration once you power it up again. If you need to recalibrate your device during a project and have not switched it off since initial calibration, proceed as follows.

1. Tap Start Mapping on the main screen.

2. Enter a name for your dataset and tap Next.

3. Tap Recalibrate to open the calibration wizard.