Damping - Emerson Rosemount 644 Reference Manual

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
page
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.
Device Dashboard Fast Keys
Re-range the transmitter with AMS Device Manager
1.
2.
3.
4.
5.
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
VIEW CONFIG
SENSOR CONFIG
UNITS
RERANGE RERANGE
LOOP TEST
DISPLAY
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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.
26
98.
Right click on the device and select Configure"
In the left navigation pane select Manual Setup.
On the Analog Output Tab find the Primary Variable Configuration group box.
Change the Upper Range Value and Lower Range Value to their desired settings.
Select Apply when complete.
Lower range value Upper range value
2, 2, 5, 5, 3
ENTER VALUES ENTER VALUES
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Reference Manual
00809-0200-4728, Rev RA
Table A-2 on
2, 2, 5, 5, 2
LRV LRV
URV URV
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Configuration