Chemical Engineering January 2018 - 14

installation in SIL2 (safety integrity
level) applications and comes with a
range of safety approvals.
And, SOR's 815PT Smart Pressure
Transmitter is a rugged, compact,
loop-powered instrument suitable for
hazardous locations and hostile environments.
It is easily configured using
HART 7 Communication Protocol and
Modbus RTU Serial Communications.
" One of the benefits of the communication
capabilities is that it allows operators
to perform predictive maintenance
based on the data, " says SOR's
Wilson. " By monitoring the data they
get from the device, users can now
see when it is time for a product to be
replaced or maintained, as opposed to
just reacting to the failure of the instrument
after the fact. "
Similarly, many of Rosemount's
pressure measurement devices offer
intelligent features such as Power
Advisory Diagnostics, which has the
ability to monitor power supply and
electrical connection to the device.
If an incident occurs that could lead
to a fault condition or loss of signal,
the device can detect it and alert the
user before the signal is lost. Statistical
Process Monitoring is another
feature available on Rosemount devices.
SPM technology characterizes
the normal operation of a process
and continually monitors it to see if
the process signature has changed,
and does so at a much faster rate
than is possible in the process control
system. " This provides users with
the ability to monitor and detect abnormal
operating conditions and receive
early detection of any problems
that may be arising, not just in the device,
but in the process and physical
installation as well, " says Nelson.
Data, such as those available from
smart pressure devices and other
instruments, enable the shift from
reactive to predictive maintenance,
says Siemen's McNutt. Because
pressure transmitters have built-in
diagnostics and alarms and timers
and often provide realtime visualization
of related systems, they can
inform users about drifts in temperatures,
pressures or calibration
issues that need attention. In traditional
analog measurements, users
only received the process value and
wouldn't know anything was wrong
with the transmitter until it wasn't responding
or until the process was off
specification until it became obvious
in other ways. " With more data about
the instrument and the process available
from pressure instruments,
users can apply that to get a better
look into the process itself and start
to employ predictive maintenance instead
of reactive, " he says.
Nelson agrees that smarter transmitters
provide high value in and of
themselves as a measurement point
and as another way to monitor various
systems. He adds that recently
they are being used to feed the IIoT
with more process insight and actionable
information that has already
been analyzed. " This is no longer just
raw data, " he says. " It is usable information
and the digitalization of that
information is allowing us to enable
the industrial internet of things. " n
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Chemical Engineering January 2018

Table of Contents for the Digital Edition of Chemical Engineering January 2018
