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Publication Number:  N/A    Date:  February 2009
Publication Date: February 2009


Calibrating The Falling Weight Deflectometer Video


This video addresses the question "Why should you calibrate your FWD?" It is intended to educate FWD managers, engineers and operators on the need for calibrating FWD equipment in order to collect high quality data for durable pavement designs. The following topics are covered in the video:

The new calibration procedure is performed in accordance with AASHTO Designation: R 32-09, Standard Recommended Practice for Calibrating the Load Cell and Deflection Sensors for a Falling Weight Deflectometer.  It includes 3 steps:

The resulting adjusted gain factors are entered into the FWD data collection software. The process takes 2-3 hours, providing that the FWD is in good operating condition.

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FWD Calibration Video Script
Download Word Document: FWD Calibration Video Script