Emerson Rosemount 2088, Справочное руководство

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17
Reference Manual
00809-0100-4108, Rev BA
Section 2: Configuration
March 2014
Configuration
Figure 2-8. Analog zero and span buttons
A. Zero and span buttons
Note

If the transmitter security is on, adjustments to the zero and span will not be able to be
made. Refer to
“Configuring transmitter security” on page 41 for security information.

The span is maintained when the 4mA/1V point is set. The span changes when the
20mA 5V 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.

Regardless of the range points, the Rosemount 2088 will measure and report all
readings within the digital limits of the sensor. For example, if the 4 and 20 mA(1-5 Vdc)
points are set to 0 and 10 inH
2
O, and the transmitter detects a pressure of 25 inH
2
O, it
digitally outputs the 25 inH
2
O reading and a 250% of range reading.
2.6.3 Damping
The damping command changes the response time of the transmitter; higher values can
smooth 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 damping command utilizes floating point
configuration allowing the user to input any damping value within 0.0-60.0 seconds.
Damping with a field communicator
Enter desired Damping Value and select APPLY .
From the HOME screen, enter the Fast Key sequence
Device Dashboard Fast Keys
2, 2, 1, 1, 5
A