Test Weight Calibrations

NSM is ISO/IEC 17025:2017 accredited to calibrate ASTM Class 6 (previously Class F) mass or test weights from 1 mg – 25 kg (or 60lbs). ASTM Class 6 (previously Class F) weights are generally used as field standards for testing industrial scales and weighing devices and those used for Class III, Class IIIL and Class IIII applications. We also have limited ASTM class 3, 4 and 5 mass or test weight calibration capabilities depending upon tolerance requirements.

Our mass calibration services include cleaning, painting, adjusting and resealing certified test weights. We are approved by the State of Texas to seal ASTM Class F (now Class 6) test weights in both our Dallas and Houston labs. We offer a fast standard turnaround time of 3-5 business days as well as local pick-up and delivery.

NSM can calibrate metric or Avoirdupois (pound) weights, and stamped serial numbers can be added onto the weights as an optional service.