Damping - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4101, Rev AA
July 2008
Figure 3-4. Zero and Span
buttons

Damping

To rerange the transmitter using the span and zero buttons, perform the
following procedure:
1. Loosen the screw holding the certifications label on the side of the
transmitter housing. Slide the label to expose the zero and span buttons.
See Figure 3-4.
2. Apply the desired 4 mA (1 Vdc) pressure value to the transmitter. Push
and hold the zero adjustment button for at least two seconds but no
longer than ten seconds.
3. Apply the desired 20 mA (5 Vdc) pressure value to the transmitter. Push
and hold the span adjustment button for at least two seconds but no
longer than ten seconds.
Span
NOTE
The span is maintained when the 4 mA point (1 Vdc point) is set. The span
changes when the 20 mA point (5 Vdc point) is set. If the lower range point is
set to a value that causes the upper range point to exceed the sensor limit,
the upper range point is automatically set to the sensor limit, and the span is
adjusted accordingly.
The "Damp" command introduces a delay in the micro-processing which
increases the response time of the transmitter; smoothing variations in output
readings caused by rapid input changes. Determine the appropriate damping
setting based on the necessary response time, signal stability, and other
requirements of the loop dynamics within your system. The default damping
value is 0.4 seconds and it can be set to any of ten pre-configured damping
values between 0 and 25.6 seconds. See list below.
• 0.00 seconds
• 0.20 seconds
• 1.60 seconds
• 12.8 seconds
The current damping value can be determined by executing the HART
Communicator fast keys or going to "Configure" in AMS Device Manager.
Rosemount 2051
Zero
• 0.05 seconds
• 0.40 seconds
• 3.20 seconds
• 25.6 seconds
• 0.10 seconds
• 0.80 seconds
• 6.40 seconds
3-13