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Reference Manual
00809-0100-4808, Rev CA
June 2008
Rosemount 3051N
2-10
NOTE
If the transmitter security jumper is in the ON position, you will not be able to
make adjustments to the zero and span. Refer to Figure 2-1 for the
appropriate placement of the transmitter security jumper.
Rerange with a Pressure
Input Source and a
Communicator
Reranging using the communicator and a pressure source or process
pressure is a way of reranging the transmitter with a pressure input. When
specific 4 and 20 mA points are not known process input can be used. This
method changes the values of the analog 4 and 20 mA points.
NOTE
When you set the 4 mA point the span is maintained; when you set the 20 mA
point the span changes. If you set the lower range point 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.
To rerange using the communicator and a pressure source or process
pressure, enter the fast-key sequence above, select 2 Apply values, and
follow the on-line instructions.
NOTE
If the transmitter security jumper is in the ON position, you will not be able to
make adjustments to the zero and span. Refer to Figure 2-1 for the
appropriate placement of the transmitter security jumper.
Rerange with a Pressure
Input Source and the
Local Zero and Span
Buttons
Reranging using the local zero and span adjustments (see Figure 2-6) and a
pressure source or process pressure is a way of reranging the transmitter with
a pressure input and when a communicator is not available. When specific 4
and 20 mA points are not known process input can be used.
NOTE
When you set the 4 mA point the span is maintained; when you set the 20 mA
point the span changes. If you set the lower range point 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.
HART Comm. 1, 2, 3, 1, 2