Instruction Manual, Type 9195E - WIM

Commissioning of a WIM Station
10. Commissioning of a WIM Station
10.1 Mechanical and Electrical checking
10.2 Calibration
Testing of sensors after installation:
Mechanical checking
Checking of the sensor state: no cracks, correct geometrical
dimensions, etc.
Proper setting of resin (no subsidence when vehicles pass)
No deterioration around the sensors
Connecting cables correctly protected by electrical
sheaths, especially at corners
Sufficient resistance against bending moment, according
to the pavement deflection and the expected loads
to be supported
Electrical checking
Insulation resistance
Response per cable – this is read directly from an oscilloscope,
under the effect of an impact delivered by the
operator or the passage of a vehicle.
Once the WIM sensors are installed and the grout has
cured, retest the sensor (see installation instructions). In
addition, it is recommended that an oscilloscope be connected
to the sensors and typical wave form (signal form)
be collected for a truck and a car. These signals should be
printed out and saved for permanent record.
The calibration should not be performed within 72 hours of
the installation of the sensors. We suggest calibration
of the site after 2 weeks of traffic having passed the
WIM site.
The calibration procedure is depending upon the end-users
requirements. It should clearly state the type of vehicles,
the number of runs, the loads, the equipment to be used
and other relevant issues.
002-300e-07.04 (200-348e) Page 25