Rosemount Models 3144 and 3244MV Smart Temperature Transmitters
5-14
PARTS LIST
INTERMITTENT SENSOR
ALGORITHM
The electronics for the Model 3144 and 3244MV transmitters contain
an intermittent sensor algorithm that monitors the input signal during
operation. The signal diagnostics routine, which occurs at each
temperature update (every 500 milliseconds), eliminates output pulsing
in an intermittent open sensor condition. Further, it validates the input
signal before the digital-to-analog (D/A) conversion takes place.
If the process temperature changes, the intermittent sensor algorithm
causes the transmitter to respond according to one of the three possible
cases described below. The definition of threshold value is the maximum
change in reading (as a percentage of output range) within one update
cycle (500 ms). The default threshold value is 2% of output range and
can be specified in the field using a HART communicator.
Case 1: Open Sensor
If the algorithm detects an open sensor, the transmitter immediately
goes into alarm (high or low, depending on the position of the failure
mode switch).
TABLE 5-3. Models 3144 and 3244MV Parts List. (• = Applicable, — = Not Applicable)
Part Description Part Number 3144 3244MV
Model 3144 Electronics Module 03144-3011-0007 • —
Model 3244MV Electronics Module 03144-3012-1007 — •
M5 Meter Kit—Aluminum (includes meter display, captive mounting hardware, 6-pin
interconnection header, and cover kit)
03144-3020-0001 ••
Meter (includes meter display, captive mounting hardware, and 6-pin interconnection
header)
03144-3020-0002 ••
Aluminum Meter Cover (includes O-ring) 03144-1043-0001 ••
Stainless Steel Meter Cover Kit (includes O-ring) 03144-1043-0011 ••
B4 Mounting Bracket Kit 03044-2131-0001 ••
B5 Mounting Bracket Kit 03144-1081-0001 ••
Model 3144 Aluminum Housing Cover (includes O-ring and wiring diagram label) 03144-1042-3101 •—
Model 3144 Stainless Steel Housing Cover (includes O-ring and wiring diagram label) 03144-1042-3111 • —
Model 3244MV Aluminum Housing Cover (includes O-ring and wiring diagram label) 03144-1042-3201 — •
Model 3244MV Stainless Steel Housing Cover (includes O-ring and wiring diagram label) 03144-1042-3211 — •
O-ring for Cover (package of 12) 01151-0033-0003 ••
Model 3144 Aluminum Housing Kit (does not include covers) 03144-1041-3101 • —
Model 3144 Aluminum Housing Kit with External Ground Lug Assembly (does not include
covers)
03144-1041-3102 • —
Model 3144 Stainless Steel Housing Kit (does not include covers) 03144-1041-3111 • —
Model 3144 Stainless Steel Housing Kit with External Ground Lug Assembly (does not
include covers)
03144-1041-3112 • —
Model 3244MV Aluminum Housing Kit (does not include covers) 03144-1041-3201 — •
Model 3244MV Aluminum Housing Kit with External Ground Lug Assembly (does not
include covers)
03144-1041-3202 — •
Model 3244MV Stainless Steel Housing Kit (does not include covers) 03144-1041-3211 — •
Model 3244MV Stainless Steel Housing Kit with External Ground Lug Assembly (does not
include covers)
03144-1041-3212 — •
Screw/Washer Combination for Sensor/Power Terminals (package of 12) 03144-1044-0001 ••
Jumper (2-pin)—Security and Alarm (package of 12) 03144-1045-0001 ••
Jumper (6-pin)—Meter Interconnection Header 03144-1046-0001 ••
External Ground Lug Assembly 03144-1047-0001 ••
Integral Transient Protector Kit (includes terminal screws and transient protector) 03144-3040-0001 ••
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