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P*521 – P*523 Pump 2 
When Relay 2 is programmed as a Pump, these parameters contain the same 
information as above for Pump 2. 
P*531 – P*533 Pump 3 
When Relay 3 is programmed as a Pump These parameters contain the same 
information as above for Pump 3. 
P*541 – P*543 Pump 4 
When Relay 4 is programmed as a Pump These parameters contain the same 
information as above for Pump 4. 
P*551 – P*553 Pump 5 
When Relay 5 is programmed as a Pump These parameters contain the same 
information as above for Pump 5. 
P*561 – P*563 Pump 6 
When Relay 6 is programmed as a Pump These parameters contain the same 
information as above for Pump 6. 
Volume 
When P1-100, P2-100 = 6 (Volume)  
Your Ultra Twin provides a variety of volume calculation features, with 11 
pre-programmed  vessel  shapes.  See  Vessel  Shape  (P1-600,  P2-600)  for 
more information. For each vessel you will need to know the dimensions  
(P1-601 to 603, P2-601 to 603) in Measurement Units (P*104) which are 
required to calculate the volume (P1-604, P2-604) which will be displayed 
in the selected Volume Units (P1-605, P2-605).  
If your vessel shape does not correspond with any of the pre-programmed 
vessel shapes, then you can use the universal calculations. For this you will 
need a level/volume graph or chart provided by the vessel manufacturer or 
you can create one based on the dimensions of the vessel. You can enter up 
to 32 pairs of breakpoints, and the more you enter, the greater accuracy of 
the volume calculation will be.