Emerson Rosemount 3144P, Reference Manual

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Specifications and Reference Data
187
Specifications and Reference Data
April 2017
Reference Manual
00809-0100-4021, Rev JA
Alarms
The AI function block allows the user to configure the
alarms to HIGH-HIGH, HIGH, LOW, or LOW-LOW with a
variety of priority levels and hysteresis settings.
Transient protection (option code T1)
The transient protector helps prevent damage to the
transmitter from transients induced on the loop wiring by
lightning, welding, heavy electrical equipment, or switch
gears. The transient protection electronics are contained in
an add-on assembly that attaches to the standard
transmitter terminal block. The transient terminal block is
not polarity insensitive. The transient protector has been
tested to the following standard:

IEEE C62.41-1991 (IEEE 587), location categories B3.

Combinational wave,
6 kV/3 kA peak, 1.2
50 uS/8 20 uS.

Ring wave, 100 kHz, 6 kV/0.5 kA peak

EFT, 4 kV, 2.5 kHz, 5 50 nS

Loop resistance added by protector: 22 ohms max.

Nominal clamping voltages: 90 V (common mode),
77 V (normal mode)
Local display
Displays all DS_65 measurements in the transducer and
function blocks including sensor 1, sensor 2, differential and
terminal (body) temperatures. The display alternates up to
four selected items and can display up to five digits in
engineering units (°F, °C, °R, K,
Ω
, and millivolts). Display
settings are configured at the factory according to the
transmitter configuration (standard or custom), and these
settings can be reconfigured in the field using a Field
Communicator or DeltaV. In addition, the LCD display can
display DS_65 parameters from other devices. Besides the
configuration of the meter, sensor
Figure A-8 on page 193
diagnostic data is displayed. If the measurement status is
good, the measured value is shown. If the measurement
status is uncertain, “uncertain” is shown in addition to the
measured value. If the measurement status is Bad, the
reason for the bad measurement is shown.
Note
When ordering a spare electronics module assembly, the
LCD display transducer block will display the default
parameter.
Turn-on time
Specification performance is achieved less than 20 seconds
after power is applied to the transmitter when the damping
value is set to zero second.
Status
Device is compliant to NAMUR NE 107, ensuring consistent,
reliable and standardized device diagnosti.c information.
The new standard is designed to improve the way device
status and diagnostic information is communicated to
operators and maintenance personnel in order to increase
productivity and reduce costs
If self-diagnostics detect a sensor burnout or a transmitter
failure, the status of the measurement will be updated
accordingly. The status may also send the PID output to a
safe value.
F
OUNDATION
Fieldbus parameters
Backup Link Active Scheduler (LAS)
The transmitter is classified as a device link master, meaning
it can function as a Link Active Scheduler (LAS) if the current
link master device fails or is removed from the segment. The
host or other configuration tool downloads the schedule for
the application to the link master device. In the absence of a
primary link master, the transmitter will claim the LAS and
provide permanent control for the H1 segment.
Schedule entries 25 (max.)
Links 30 (max.)
Virtual Communications Relationships (VCR) 20 (max.)