Emerson 3051N User Manual

Reference Manual 

00809-0100-4808, Rev CA
June 2008

2-9

Rosemount 3051N

FIGURE 2-5. Square Root 
Output Transition Point.

Rerange

The Range Values command sets the 4 and 20 mA points (lower and upper 
range values). Setting the range values to the limits of expected readings 
maximizes transmitter performance. In practice, you may reset the transmitter 
range values as often as necessary to reflect changing process conditions.

You may use one of three methods to rerange the transmitter. Each method is 
unique; examine all three closely before deciding which method to use.

Rerange with a 
Communicator Only

Reranging using only the communicator changes the values of the analog 4 
and 20 mA points independently without a pressure input.

NOTE
Changing the lower or upper range point results in similar changes to the 
span.

To rerange using only the communicator, enter the fast-key sequence above, 
select 1 Keypad input, and follow the on-line instructions. Or enter the values 
directly from the 

screen.

HART Comm.

1, 2, 3, 1, 1