Vaisala MD30 Setup Manual page 12

Setup Guide
Calibration step 3: dry road reference
Sensor needs a reference of how local dry road looks like. The reference setting is performed while
driving on the most common road surface type in the road network. This optimizes the sensor
performance on the road type in question.
Do one of the following:
• Option A: drive on local dry road with the most common surface type.
• Option B: use factory coefficients temporarily before local dry road becomes available.
• Option C: copy local dry coefficient values from another sensor.
Option A: driving on local dry road
Drive on dry road for 30 seconds to get an average reference from local road.
Requirement
Mobile sensor location
Vehicle position
Surface state
Surface condition
Surface material
Recommended for first-time use of sensor and first adaptation for the specific road surface type.
1. Select a location where the road surface type is representative of the most commonly existing
surface type in the area of interest.
2. Check that the mobile sensor is reporting data and there are no errors.
3. In RoadAI app, select Set Reference > Road Reference.
4. Drive for a minimum of 30 seconds on dry road. Check possible error messages.
If the RoadAI app indicates that the measurement is done, the calibration was successful.
5. When measurement is done, write down the surface coefficients to use later on with another
sensor. Scroll right in the Sensor View. If the adaptation was not successful, repeat the procedure.
12
Description
Installed on vehicle
Moving
Completely dry road surface
Old asphalt; avoid newly laid asphalt
Prefer asphalt over concrete unless concrete is the
most common surface material in the area of interest
30 s
M212169EN-D