How often do Pile Driving Analyzer® (PDA-8G) sensors need recalibrated?


Pile Dynamics Inc.® (PDI) and the American Society for Testing and Materials (ASTM) D4945 recommend that sensors be recalibrated every two years despite how often they are used. Additionally, PDI suggests recalibrating sensors if they exhibit questionable data before two years. PDI’s policy is to recalibrate any sensor returned to its Maintenance Department for checkup or repair.