Emerson 249B Datasheet download pdf (Page 15)

2500-249 Controllers and Transmitters

D200037X012

Product Bulletin

34.2:2500

July 2012

Ordering Information

Application

When ordering, specify:

n Control (proportional, proportional‐plus‐reset, or

on‐off), or transmission mode

n Liquid level service (give type, pressure,

temperature and specific gravity)

n Interface level service (give specific gravity of both

liquids and minimum proportional band, differential

gap, or span required)

n Density service (give minimum and maximum

specific gravity required)

Construction

Refer to the specifications and the Options section.

Review the descriptions for each specification, under

each option, and in the referenced tables and figures;

specify the desired selection whenever there is a

choice to be made. Right‐hand mounting (with

position 1 if appropriate) will be supplied automatically

unless some other mounting method is specified.

Unless another length is specified, 305 millimeters

(12 inches) will be used as the standard cageless

sensor length from flange face—or displacer rod—to

displacer top.

Always specify the complete type number (including

the R suffix for reverse action) of the controller or

transmitter, sensor, supply pressure regulator, and

other desired equipment. On differential relief

controllers, specify whether relief is to occur with

excessive proportional or with excessive reset

pressure.

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Emerson 249B Datasheet Page 15