As an accredited testing laboratory, SMRL performs internal calibrations of its scales, displacement sensors and force transducers. A set of reference standards with traceable calibrations to the U.S. National Institute for Standards and Technology (NIST) are available for mass (from 1 mg to 50 kg), displacement (suite of gage blocks from 0 to 500 mm and a Mitutoyo LH-600EG high accuracy linear height gage with a measurement range of 600 mm and an accuracy of better than 2 µm), and calibration standard load cells from (5 kN to 5,000 kN). The temperature and relative humidity sensors as well as the calibration standards are sent to accredited calibration labs for traceable calibration at regular intervals established by the Laboratory Quality Manual.