Endress+Hauser NRF81 - Page 72

Commissioning Tankside Monitor NRF81
72 Endress+Hauser
9.2.10 Tank calculation: Hydrostatic Tank Deformation (HyTD)
Hydrostatic Tank Deformation can be used to compensate the vertical movement of the
Gauge Reference Height (GRH) due to bulging of the tank shell caused by the hydrostatic
pressure exerted by the liquid stored in the tank. The compensation is based on a linear
approximation obtained from manual hand dips at several levels divided over the full
range of the tank.
A
B
C
D
A0028721
 33 Correction of the hydrostatic tank deformation (HyTD)
A "Distance" (tank nearly empty)
B Gauge Reference Height (GRH)
C HyTD correction value
D "Distance" (tank filled)
This mode should not be used in conjunction with HTG as with HTG the level is not
measured relative to the gauge reference height.
The Correction of the Hydrostatic Tank Deformation is configured in the HyTD
submenu (→  190)