Emerson Rosemount 2051 Reference Manual page 50

Configuration
March 2024
• Rerange with a Field Communicator or AMS Device Manager only.
• Rerange with a pressure input source and a Field Communicator or AMS Device
Manager.
• Rerange with a pressure input source and the local zero and span buttons (option D4).
Note
If the transmitter security switch is ON, adjustments to the zero and span will not be able
to be made. Refer to
Rerange with a Field Communicator or AMS Device Manager only
The easiest and most popular way to rerange is to use the Field Communicator only. This
method changes the range values of the analog 4 and 20 mA points (1 and 5 Vdc points)
independently without a pressure input. This means that when you change either the 4 or
20 mA setting, you also change the span.
An example for the 4–20 mA HART
If the transmitter is ranged so that:
4 mA = 0 inH
20 mA = 100 inH
And you change the 4 mA setting to 50 inH
settings are:
4 mA = 50 inH
20 mA = 100 inH
Note
The span was also changed from 100 inH
remained at 100 inH
To obtain reverse output, simply set the 4 mA point at a greater numerical value than the
20 mA point. Using the above example, setting the 4 mA point at 100 inH
point at 0 inH
Field Communicator
Table 3-8: Fast keys
4–20 mA Fast Keys
1–5 Vdc Fast Keys
From the HOME screen, enter the Fast Key sequence Rerange with a Communicator Only.
Rerange with AMS Device Manager only
Right-click on the device and select Configure from the menu. In the Basic Setup tab,
locate the Analog Output box and perform the following procedure:
Procedure
1. Enter the Lower Range Value (LRV) and the Upper Range Value (URV) in the fields
2. An Apply Parameter Modification screen appears, enter desired information and
3. After carefully reading the warning provided, select OK.
50
Configure security and alarm
O, and
2
O,
2
O, and
2
O
2
O.
2
O will result in reverse output.
2
1, 2, 3, 1
1, 2, 3, 1
provided. Select Apply.
select OK.
for security information.
output:
®
O using the communicator only, the new
2
O to 50 inH O, while the 20 mA setpoint
2 2
Reference Manual
00809-0100-4101
O and the 20 mA
2
Emerson.com/Rosemount