Table of Contents
Advertisement
Reference Manual
00809-0200-4802, Rev BA
Note
If Scaled Variable is mapped as the primary variable and square root mode is selected, ensure
transfer function is set to linear. Refer to
Field Communicator v3.3
To configure the scaled variable with a Field Communicator, perform the following procedure:
1.
2.
3.
4.
5.
6.
8.
Configuration
From the HOME screen follow the fast key sequence "Scaled Variable Configuration."
Choose OK after the control loop is set to manual.
Enter the scaled variable units.
a. Units can be up to five characters long and include A — Z, 0 — 9, -, /,%, and *.
Default unit is DEFLT.
b. The first character is always an asterisk (*), which identifies the units displayed
are scaled variable units.
Select scaled data options
a. Select linear if the relationship between PV and scaled variable units are linear.
Linear prompts for two data points.
b. Select square root if the relationship between PV and scaled variable is square
root (flow applications). Square root will prompt for one data point.
Enter pressure value position 1. Pressure values must be within the range of the
transmitter.
a. (If performing a Linear Function) Enter the lower known value point considering
any linear offset.
b. (If performing a Square Root Function) Choose OK to acknowledge pressure value
is set to zero.
Enter scaled variable position 1.
a. (If performing a Linear Function) Enter the lower known value point; this value
must be no longer than seven digits.
b. (If performing a Square Root Function) Choose OK to acknowledge scaled variable
value is set to zero.
7.Enter pressure value position 2. Pressure values must be within the range of the
transmitter.
a. Enter the upper known value point.
Enter scaled variable position 2.
a.
(If performing a Linear Function) Enter custom unit equivalent to the upper
known value point; this value must be no longer than seven digits.
b. (If performing a Square Root Function) Enter custom unit equivalent to the value
in step 7; this value must be no longer than seven digits. Skip to step 10.
"Set transfer function" on page
Section 2: Configuration
May 2013
14.
19
Advertisement
Table of Contents
