pomak nulte točke -
http://www.ndt.net/forum/files/thickm-w-us-nksv-presentation...
Manual Procedure using an artificial Zero Point (from a built-in
thickness gauge test block) and the first Backwall Echo of a test block of known thickness (Sound Velocity
-Meter (DM V DL))

http://www.metesco.nl/media/product/256/files/Krautkramer_DM...
This means that the acoustic zero point is dynamically
adjusted during the measurement process, compensating for
wear and “growth” during measurements.

Izraz se pojavljuje kod baždarenja mjernih instrumenata:

https://books.google.hr/books?id=JNXJCQAAQBAJ&pg=PA461&lpg=P...

http://uk.hach.com/asset-get.download.jsa?id=25593609943
str 18.
Instalacijski uvjeti u cijevima mogu uzrokovati refleksiju tla pri mjerenju mutnoće što zauzvrat može uzrokovati pomak nulte točke. Nadoknadite taj efekt ispravkom odmaka

pomak nulte točke ovisan o položaju ispravak nulte točke moguć na licu mjesta ili preko Setup-a (20% od nazivnog mjernog područja).