Standard Recommended Practice for
Calibrating the Reference Load Cell Used
for Reference Calibrations for Falling Weight Deflectometer
AASHTO Designation: R 33-03 (2008)1
1.1.The reference load cell is a precision instrument that requires regular and thorough calibration.
1.2.It is essential that the reference load cell be calibrated using a testing machine that is properly maintained and accurately calibrated.
1.3.The reference load cell and its cable and the associated signal conditioner are considered a system
of instruments which are to be calibrated together and used together.
1.4.This practice may involve hazardous materials, operations, and equipment.
It does not purport to address all of the safety concerns associated with its use.
It is the responsibility of the user of this practice to consult and establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
Click below to download AASHTO Designation: R 33-03 (2008) pdf free
Click here to download AASHTO Designation: R 32-03 (2008) pdf free download