How often do the Pile Driving Analyzer® (PDA) sensors need to be recalibrated?


In accordance with American Society for Testing and Materials (ASTM) D4945 recommendation, Pile Dynamics recommends that all sensors be recalibrated every two years, regardless of how much they have been used during this period. If any sensor gives questionable data prior to two years, Pile Dynamics also recommends recalibration. It should be noted that Pile Dynamics has a policy of recalibrating any sensor that is returned to its Maintenance Department for check-up or repair.