Emerson manual Rerange with a Communicator Only, Rosemount 3051N, Reference Manual

Reference Manual

00809-0100-4808, Rev CA June 2008

Rosemount 3051N

FIGURE 2-5. Square Root Output Transition Point.

Full Scale Output
	Full Scale
(mA dc)	Flow (%)

Sq. Root

Curve

Transition Point

Linear Section

Sq. Root Curve

Transition

Point

Slope=42

Slope=1

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

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

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 ONLINE screen.

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