Penetrometer Apparatus Calibration
Penetrometer Apparatus Calibration involves verifying and adjusting the device to ensure accurate measurements of soil strength and consistency. This process enhances the reliability of geotechnical data, supports precise engineering decisions, and ensures compliance with industry standards. Regular calibration minimizes errors and extends the lifespan of the equipment.
Penetrometer Apparatus Calibration
Penetrometer Apparatus Calibration involves verifying and adjusting the device to ensure accurate measurements of soil strength and consistency. This process enhances the reliability of geotechnical data, supports precise engineering decisions, and ensures compliance with industry standards. Regular calibration minimizes errors and extends the lifespan of the equipment.
Scale S/N
Timer S/N
Results
Procedure E-250/ASTM D5/AASHTO T49
Dial accurate to 0.1mm
Spindle readily detaches
Mass of Spindle: 47.45 to 47.55 g
Mass of 50 g weight: 49.95 to 50.05 g
Mass of 100 g weight: 99.95 to 100.05 g
Needle moves vertically and perpendicular to flat base
Device equipped with leveling indicator
Level indicator verified with handheld level
Automatic timer accurate to 5 seconds (+/- 0.1 second). Record the elapsed time
Dial reading for 0.0625 in (1.5 mm) gauge block: 15 +/- 1 dmm
Dial reading for 0.2 in (5.08 mm) gauge block: 50.8 +/- 1 dmm
Dial reading for 0.5 in (12.7 mm) gauge block: 127 +/- 1 dmm
Dial reading for 1.0 in (25.4 mm) gauge block: 254 +/- 1 dmm
Maintenance Items
Clean entire unit and make sure base is free of asphalt
Clean weights making sure they are free of asphalt prior to weight verification
Assure plunger moves freely when clutch is depressed. Clean and lube as necessary
Action Recommended
Comments
Source: AA - Roanoke (Community Member)