Appendix
A-1
A
Transmitter Improvements
OVERVIEW
This appendix describes the additional features available in the
improved Model 3144 and 3244MV transmitters. Both the field device
and the software revision numbers have been changed. To determine
which Model 3144 or 3244MV transmitter version you have, first
establish communications with the Model 275 HART Communicator.
Select
1 Device Setup
, then
5 Review
. Scroll through the information
until you find the Field Device Revision screen and the Software
Revision screen. Compare the revisions named in the Model 275 HART
Communicator to those below.
REVISION DIFFERENCES
SUMMARY
See page B-1 for instructions on determining whether or not your
HART communicator contains the appropriate device descriptor for
communicating with the improved transmitter.
TABLE A-1. Model 3144 and 3244MV Transmitter Revision Differences.
Improved Model 3144 and 3244MV
Previous Model 3144 and 3244MV
Field Device Revision number 2
Field Device Revision number 1
Software Revision number 1
Software Revision number 4
Added sensor input types: Pt 1000
α
= 0.00385 and Pt 100
α
= 0.003916
NA
Platinum
α
= 0.00385 RTD curves reference
the ITS-90 standard (IEC 751, 1995)
Platinum
α
= 0.00385 RTD curves reference
the IPTS-68 standard (IEC 751, 1983, 1986)
Analog output and alarm levels can be
ordered to be NAMUR-compliant with option
codes A1 and CN
NA
EMF compensation is performed on 3-wire
and 4-wire sensors to improve measurement
accuracy
NA
Average Temperature is available as a
device variable
NA
Drift Alert feature is available
NA
Active Calibrator Mode is available for use
when certain calibration equipment is used
that requires steady current to function
properly
Both RTD Current and T/C Pulsing Mode
are available, providing the same
functionality that the single Calibrator Mode
command provides
The intermittent sensor detect algorithm can
be turned on or off, and the output response
threshold can be adjusted via HART
The intermittent sensor algorithm is always
on and the output response threshold is
always 2% of output range
The CJC Calibration Value command is no
longer valid
CJC Calibration Value command is utilized
when the electronics are replaced in the field