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Example 4 : Differential Control 
 
empty distance (P1-105 & P2-105), 11.0 
feet 
100%,  span (P1-106 7P2-106),  10.0 feet 
85% , Pt 1, high alarm on (P*213), 8.5 feet 
80% , Pt 1, high alarm off (P*214), 8.0 feet 
15% , Pt 2, low alarm off (P*254), 1.5 feet 
10% , Pt 2, low alarm on (P*253), 1.0 feet 
5%, Diff control, on, (P*223) 0.5 feet 
1%, Diff. control, off, (P*224) 0.1 feet 
Note 
In this example, the transducers are mounted at the same height. If 
the transducers are mounted at different heights, ensure that the 
empty levels are correct such that there is no differential present 
when the level is zero on both sides.