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P1-605, P2-605 Volume Units 
This parameter determines the units that  you  wish  to display, for volume 
conversion.  It  is  used  in  conjunction  with  P1-607,  P2-607  (maximum 
volume),  and  the  units are  shown  on the  display (subject  to  P1-810, P2-
810). The choices are: 
 
P1-606, P2-606 Correction Factor 
This parameter is used to enter a correction factor, when required, such as 
the specific gravity of the material so that the volume calculated is relative 
to the actual amount of material that can be contained between empty level 
(P1-105, P2-105) and 100% of span (P1-106, P2-106). Default = 1 
P1-607, P2-607 Max Volume 
This  parameter  displays  the  actual  maximum  volume  that  has  been 
calculated  by the  Ultra  Twin,  i.e.  P1-604,  P2-604  Calculated Volume  x 
P1-606,  P2-606  Correction  Factor,  and  is  a  Read  Only  parameter.  The 
volume displayed will be shown in P1-605, P2-605 Volume Units and is 
the total volume available between empty level (P1-105, P2-105) and 100% 
of span (P1-106, P2-106).