Site Maintenance

General Principles

To ensure that a WIM system performs throughout the established site design life, jurisdictions need to perform maintenance at each site. Maintenance can either be corrective or preventive. Corrective maintenance repairs or replaces any malfunctioning equipment or roadway deterioration. Preventive maintenance ensures that the site will function properly by periodically inspecting the system and roadway. Corrective maintenance. Corrective maintenance is…
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Culway Site Maintenance

It is recommended that each installation is checked at least once every six months. This should include: pavement integrity (depressions, potholes, cracks) piezoelectric sensor and strain gauge installation (e.g. exposed or broken sensors and/or cables) sensitivity and quality of signal from piezoelectric sensors and strain gauges (e.g. insulation resistance, inductance) cabinet and/or enclosure condition and security (clean if necessary) if…
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Bending Plate Site Maintenance

It is recommended that bending plate installations are checked every six months. Each check should include: pavement integrity (depressions, potholes, cracks) frame installation (look for loosened parts, pavement break-outs) weigh pad suspension (banging during passage of trucks indicates loose rail or bad support) drain outlet (clean if necessary) cabinet and cabling condition (clean if necessary) if necessary the lane needs…
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Capacitance WIM Site Maintenance

The highly durable polyurethane which totally encapsulates the capacitance weigh sensor provides excellent and durable protection to the sensor. As such, capacitance pads require relatively low maintenance. It is recommended that the bolts be regularly checked. After the first installation the bolts must be checked after three months to confirm that the sensor has settled in well under traffic (recommended…
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Piezoelectric WIM Site Maintenance

Maintenance procedures with piezoelectric sensor WIM systems are fairly minimal when compared to other systems utilising bending plates and single load cells. Regular inspections (monthly) are recommended and consist of: visual inspection of the road condition around the sensors measurement of the capacitance and resistance of the piezoelectric sensors measurement of the resistance (and inductance if possible) of the inductive…
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