Reference Manual
00809-0400-4728, Rev AA
June 2011
Rosemount 644
A-16
Standard FOUNDATION fieldbus ConfigurationUnless otherwise specified, the transmitter will be shipped as follows for all sensors:Custom ConfigurationCustom 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.Final StationAI Blocks are scheduled for 1 second. AI Blocks are linked as shown above.
Sensor Type: 4-wire Pt 100 ( = 0.00385) RTD
Damping: 5 seconds
Units of Measurement: °C
Line Voltage Filter: 50 Hz
Software Tag: See “Tagging” on pageA-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
Option Code Requirements/
Specification
C1: Factory
Configuration Data
(CDS required)
Date: day/month/year
Descriptor: 16 alphanumeric characters
Message: 32 alphanumeric character
Analog Output: Alarm and saturation levels
C2:Transmitter –
Sensor Matching The transmitters are designed to accept Callendar-Van Dusen
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
Calibration Will include 5-point calibration at 0, 25, 50, 75, and 100% analog
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
Tb
Note:
T1 = Sensor Temperature
Tb = Terminal Temperature
AI 1300
AI 1400