Rosemount 644

Reference Manual

00809-0400-4728, Rev AA June 2011

Standard FOUNDATION fieldbus Configuration

Unless otherwise specified, the transmitter will be shipped as follows for all sensors:

Sensor Type: 4-wire Pt 100 (α = 0.00385) RTD

Damping: 5 seconds

Units of Measurement: °C

Line Voltage Filter: 50 Hz

Software Tag: See “Tagging” on page A-14

Function Blocks Tags:

Resource Block: RB

Transducer Block: TB

LCD Block: LCD

Analog Input Blocks: AI1, AI2

Alarm Range: 0

Alarm Limits of AI1 and AI2:

HI-HI: 100 °C (212 °F)

HI: 95 °C (203 °F)

LO: 5 °C (41 °F)

LO-LO: 0 °C (32 °F)

Local Display (when installed): Engineering Units of Temperature

Custom Configuration

Custom configurations are to be specified when ordering. This configuration must be the same for all sensors. The following table lists the necessary requirements to specify a custom configuration.

 

Requirements/

 

 

 

Option Code

Specification

 

 

 

C1: Factory

Date: day/month/year

 

 

 

Configuration Data

Descriptor: 16 alphanumeric characters

 

(CDS required)

Message: 32 alphanumeric character

 

 

Analog Output: Alarm and saturation levels

 

C2:Transmitter –

The transmitters are designed to accept Callendar-Van Dusen

 

Sensor Matching

constants from a calibrated RTD. Using these constants, the

 

 

transmitter generates a custom curve to match the

 

 

sensor-specific curve. Specify a Series 65, 65, or 78 RTD sensor

 

 

on the order with a special characterization curve (V or X8Q4

 

 

option). These constants will be programmed into the transmitter

 

 

with this option.

 

 

 

C4: Five Point

Will include 5-point calibration at 0, 25, 50, 75, and 100% analog

 

Calibration

and digital output points.

 

 

 

 

Use with Calibration Certificate Q4.

 

F6: 60 Hz Line Filter

Calibrated to a 60 Hz line voltage filter instead of 50 Hz filter

 

 

 

 

 

 

 

 

 

 

Standard Block Configuration

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1

 

 

 

 

 

 

 

AI 1300

 

 

 

 

Tb

 

 

 

 

 

 

AI 1400

 

 

 

 

Note:

 

 

 

 

 

 

T1 = Sensor Temperature

 

 

 

Tb = Terminal Temperature

 

Final Station

AI Blocks are scheduled for 1 second. AI Blocks are linked as shown above.

A-16

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Emerson 644 Standard Foundation fieldbus Configuration, Custom Configuration, Final Station, Standard Block Configuration