This refers to the pairing with a new or another Bluetooth device (tablet, smartphone) in case of an existing pairing with a device.

Note: after the first connection has been established, the MARWIS sensor automatically tries to re-establish this Bluetooth connection.

The MARWIS sensor can only be connected to one mobile device!

When changing the mobile device, it is necessary to change the Bluetooth connection currently stored in the MARWIS sensor. To do this, the new mobile device initiates the connection one time.

The following steps must be done:

1. Make sure that the previous Bluetooth connection is deactivated or that the mobile device is out of range.
2. Make sure that a valid connection is established between your new Bluetooth device and the MARWIS sensor (see Chapter 1.1).
3. To initiate the connection, open the MARWIS app and go to the list of available sensors (device connection icon in the upper right corner ). Select the sensor you want to connect.

After initialization, the selected sensor should no longer have a grey background. If the grey background disappeared the previous connection was overwritten and the connection to the selected sensor is the new default connection.

The dashboard view is used for monitoring/outputting the measured values while you drive. The measured values of all selected channels as well as a „lane“ of the measurement run and its colour which symbolizes the road condition, are displayed.

This view shows the current measured values of the individual sensor channels. Scroll down if there are more values than can be displayed on the screen.

The symbol on the left represents the type of the measured value. Tap on the symbol to see a short description of the respective measured value.

Find the channel settings of a sensor by tapping on the icon on the bottom right . The first time a connection with a MARWIS sensor is established the list of channels is automatically initialized with default values (height of the water film, road temperature, road condition, friction, ice percent, dew point temperature).

In principle, all channels listed here are read out by the sensor. The checkbox to the left of channel name indicates whether the channel is displayed in the view or not.

Click on the channel symbol and hold to move the channel to another position in the list.

To delete or deactivate a measuring channel, wipe over the respective line to the left or right. This will not delete the channel completely but removes it from the recording of measured values. By clicking on the „add” icon  at the top right corner, a channel can be added to the channel list again.

For most applications the standard channels are sufficient. It is possible though, to create further channels. Manage the list of user defined channels via the  icon left to the „Add“ icon. The operation of this list of channels is similar to the list of channels described above. When creating a new channel, the individual channel details must be entered manually. The example shows the waterfilm height in „mil“, a US-American unit:

For the correct adaptation of the sensor to the conditions of the route to be travelled, an adjustment must be carried out during the commissioning of the MARWIS-UMB.

For this purpose, the MARWIS-UMB must be installed on the measuring vehicle in the planned position.

The adjustment must be carried out on a dry road section and at standstill!

By tapping the menu item “Adjustment profile”, a list of the adjustment profiles currently stored in the sensor opens. You can only select profiles with “valid” adjustment data.

By tapping on the pen symbol  an adjustment profile can be created or changed. The following dialog opens.

Before you “Start” the adjustment, the name and the duration of the adjustment must be specified. A minimum runtime of 10s is recommended.

Adjustment can only be started if the LED and housing temperature are within the specified range. This is indicated by the device status and the adjacent LED (in case of over/under temperature this is indicated by a yellow/orange LED and the “START” button is disabled).

Tap on “Start” to start the adjustment procedure. You can see the progress of the adjustment now.

Confirm with “OK” to return to the device settings.

To save the adjusted device settings, go to the standard view using the back function as described in chapter 3.3.2. A window opens where you must confirm the acceptance of the change.

After a short time, you get to the standard view and receive the message that the sensor is restarted:

The measured road temperature can be adjusted here.