Emerson manual Rosemount 3051N, Reference Manual

Rosemount 3051N

Reference Manual

00809-0100-4808, Rev CA June 2008

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 2-1for the appropriate placement of the transmitter security jumper.

Rerange with a Pressure Input Source and a Communicator

HART Comm. 1, 2, 3, 1, 2

Rerange with a Pressure Input Source and the Local Zero and Span Buttons

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 2-1for the appropriate placement of the transmitter security jumper.

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.

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