Sensors & Software PDP1000, User Manual

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PDP User’s Guide Appendix H:Glossary
H-2
Normalized density – sometimes called relative density or compaction,
expresses the density measured as a percentage of the site-specific maximum
density
Maximum Density – the maximum given density possible for a given sample of
asphalt, assuming there are no air voids (in other words 100% compacted)
Non-Destructive Testing (NDT) – using non-invasive technologies to examine a
specimen. The specimen is not altered or affected in any way by the testing
Profile collection mode – a mode of operation where PDP is moved along the
surface and data is collected. Data is displayed as some parameter (density,
permittivity) vs. permittivity
Relative Density – sometimes called normalized density or compaction, this
parameter expresses the density measured as a percentage of the site-specific
maximum density.
Relative Permittivity (K) – also known as the relative dielectric permittivity, this
is the initial value calculated by PDP. Relative permittivity is expressed as a
unit-less quantity relative to the permittivity of free space.
Stationary collection mode – a mode of operation whereby the PDP is kept
stationary, and data is collected and averaged over a time interval
Validation Test – on onboard test that ensures the PDP is operating properly
Validation Target – a cylindrical object that is used as part of the validation test