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Dimensions 
P104 Measurement Units 
This parameter sets the units you want to use for programming and display 
All units of measure are METRES 
All units of measure are CENTIMETRES 
All units of measure are MILLIMETRES 
All units of measure are FEET 
All units of measure are INCHES 
 
P105 Empty Level 
This parameter is to be set to the maximum distance from the face of the 
transducer to the empty point, in P104 Measurement Units. Note this value 
affects  span  as  well,  (see  important  information below),  so  should  be  set 
before span. 
Important Information 
When changing the Empty Distance (P105) you can also recalculate the 
values for the Span so that it equals the empty distance (P105) minus Near 
Blanking (P107) and the Relay Setpoints, so that they remain at the same 
percentage values of the empty distance as they were before you changed 
the empty distance (P105). You will be asked the question “Recalculate 
Span?” if you choose yes (enter 1), then the span will be recalculated. Any 
other answer will leave the span at its original value. You will then be asked 
if you want to “Recalculate Setpoints?”, if you choose Yes (enter 1), then all 
Relay Setpoints will be recalculated as a percentage of the new empty 
distance. Any other answer will leave the setpoints at their original values. 
 
 
P106 Span 
This parameter should be set to the maximum distance from the Empty Level 
(P105) to the maximum material level. It is automatically set to be equal to 
the Empty Level (P105) less the Near Blanking distance (P107), when you 
set the empty level.