How often does the Pile Integrity Tester (PIT) need to be recalibrated?


Even though American Society for Testing and Materials (ASTM) does not specify a period for recalibrating the PIT Main Unit, Pile Dynamics Inc. (PDI) recommends that it be recalibrated every two years. Besides checking the accuracy of the time base and of the internal circuits, during the calibration process the Main Unit is thoroughly checked for other problems that might affect its performance. Having the Main Unit recalibrated by PDI or by one of its authorized agents will help ensure that it is working properly.