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Reference Manual
00809-0100-4102, Rev AA
Section 2: Configuration
May 2013
Configuration
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
Figure 2-3. Example tank
A. 230 in.
B. 200 in.
C. 12 in.
D. 0.94 sg
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
DP Flow example
A differential pressure transmitter is used in conjunction with an orifice plate in a flow
application where the differential pressure at full scale flow is 125 inH2O. In this particular
application, the flow rate at full scale flow is 20,000 gallons of water per hour. It is highly
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
H
L
A
B
C
D