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26
Reference Manual
00809-0200-4728, Rev RA
Section 2: Configuration
April 2015
The range of expected readings is defined by the Lower Range Value (LRV) and Upper Range
Value (URV). The transmitter range values can be reset as often as necessary to reflect changing
process conditions. For a complete listing of Range & Sensor limits, refer to
.
Note
The re-range functions should not be confused with the trim functions. Although the re-range
function matches a sensor input to a 4–20 mA output, as in conventional calibration, it does not
affect the transmitter’s interpretation of the input.
Select from one of the methods below to re-range the transmitter.
Re-range the transmitter with a Field Communicator
From the
HOME
screen, enter the Fast Key sequence.
Re-range the transmitter with AMS Device Manager
1.
Right click on the device and select
Configure”
2.
In the left navigation pane select
Manual Setup
.
3.
On the
Analog Output Tab
find the Primary Variable Configuration group box.
4.
Change the
Upper Range Value
and
Lower Range Value
to their desired settings.
5.
Select
Apply
when complete.
Re-range the transmitter with LOI
Reference the image below to find the range value configuration path on the LOI.
Figure 2-13. Re-ranging the Transmitter with LOI
2.8.2
Damping
The damping function changes the response time of the transmitter to smooth variations in
output readings caused by rapid changes in input. Determine the appropriate damping setting
based on the necessary response time, signal stability, and other requirements of the loop
dynamics of the system. The default damping value is 5.0 seconds and can be reset to any value
between 1 and 32 seconds.
Lower range value Upper range value
Device Dashboard Fast Keys
2, 2, 5, 5, 3
2, 2, 5, 5, 2
ENTER VALUES
ENTER VALUES
BACK TO MENU
EXIT MENU
LRV
LRV
URV
URV
BACK TO MENU
EXIT MENU
VIEW CONFIG
SENSOR CONFIG
UNITS
RERANGE
RERANGE
LOOP TEST
DISPLAY
EXTENDED MENU
EXIT MENU
Summary of Contents for Rosemount 644
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