Reference Manual

Reference Manual 
00809-0100-4102, Rev AA
Section2: Configuration
May 2013
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a. When configuring for level applications, select Linearunder SelectScaleddataoptions.
b. When configuring for flow applications, select SquareRootunder SelectScaleddata 
options.
DPLevelExample 
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Figure2‐3.Exampletank 
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A. 230in. 
B. 200in. 
C. 12in. 
D. 0.94sg 
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A differential transmitter is used in a level application. Once installed on an empty tank and taps
vented, the process variable reading is -209.4 inH2O. The process variable reading is the head
pressure created by fill fluid in the capillary. Based on Table 2-2 on page 2-17, the Scaled
Variable configuration would be as follows:
Table2‐2.ScaledVariableConfigurationforTankApplication 
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Scaled Variable units: inch
Scaled data options: linear
Pressure value position 1: 0 inH
2
O
Scaled Variable position 1: 12 in.
Pressure value position 2: 188 inH
2
O
Scaled Variable position 2: 212 in.
Linear offset: -209.4 inH
2
O
DPFlowexample 
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Configuration
A differential pressure transmitter is used in conjunction with an orifice plate in a flow
application where the differential pressure at ful l s c a l e f l o w i s 1 2 5 i n H 2 O . I n t h i s p a r t i c u l a r
application, the flow rate at full scale flow is 20,000 gallons of water per hour. It is highly
17
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D
C
A
B
H L