User Manual Owner's manual

Publication 1746-UM007C-EN-P - July 2004
5-8 Channel Configuration, Data, and Status
Proportional Counts to Engineering Units
Equation: Engr Units Equivalent = S
LOW
+ { (S
HIGH
- S
LOW
)
x [ ( Proportional Counts value displayed + 32768) / 65536 ] }
• Assume type E input type, proportional counts display type,
channel data = 21567.
• Want to calculate °F equivalent.
• From Channel Data Word Format table, S
LOW
= -454°F and
S
HIGH
= 1832°F.
Solution:
Engr Units Equivalent = -454°F + { [1832°F - (-454°F) ]
x [ ( 21567 + 32768) / 65536 ] } = 1441.3°F
Engineering Units to Proportional Counts
Equation: Proportional Counts Equivalent = { 65536 x [ ( Engineering
Units desired - S
LOW
) / ( S
HIGH
- S
LOW
) ] } - 32768
• Assume type E input type, proportional counts display type,
desired channel temp. = 1000°F.
• Want to calculate Proportional Counts equivalent.
• From Channel Data Word Format table, S
LOW
= -454°F and
S
HIGH
= 1832°F.
Solution:
Proportional Counts Equivalent = { 65536 x [ ( 1000°F -
(-454°F) ) / (1832°F - (-454°F ) ) ] } - 32768 = 8916.