Sensor Transducer Block - Emerson Rosemount 644 FOUNDATION Reference Manual

Reference Manual
00809-0400-4728, Rev CA
Table 2-1. RB.RECOMMENDED_ACTION
2.4.2

Sensor transducer block

Note
When the engineering units of the XD_SCALE are selected, the engineering units in the Transducer Block
change to the same units. This is the only way to change the engineering units in the sensor transducer
block.
Damping
The damping parameter in the Transducer Block may be used to filter measurement noise. By increasing
the damping time, the transmitter will have a slower response time, but will decrease the amount of
process noise that is translated to the transducer block primary value. Because both the LCD display and
AI block get input from the transducer block, adjusting the damping parameter will effect both blocks.
Note
The AI block has it's own filtering parameter called PV_FTIME. For simplicity, it is better to do filtering in
the transducer block as damping will be applied to primary value on every sensor update. If filtering is
done in AI block, damping will be applied to output every macrocycle. The LCD display will display value
from transducer block.
Configuration
Failed/Maint/Advise
Alarm type
Active Event
None None
Advisory NV Writes Deferred
Configuration Error
Primary Value Degraded
Maintenance
Calibration Error
Secondary Value Degraded
Electronics Failure
HW / SW Incompatible
NV Memory Failure
Failed
Primary Value Failure
Secondary Value Failure
Recommended action
text string
No action required
Non-volatile writes have been deferred, leave the
device powered until the advisory goes away
Re-write the Sensor Configuration
Confirm the operating range of the applied sensor
and/or verify the sensor connection and device
environment
Retrim the device
Verify the ambient temperature is within operating
limits
Replace the Device
Verify the Hardware Revision is compatible with the
Software Revision
Reset the device then download the Device
Configuration
Verify the instrument process is within the Sensor
range and / or confirm sensor configuration and
wiring.
Verify the ambient temperature is within operating
limits
Configuration
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