Breakthrough adaptive sensing tech in new ST80 thermal mass flow meter

AMS Instrumentation and Calibration announces the launch of the new state-of-the-art
ST80 Series thermal mass flow meters from Fluid Components International (FCI),
featuring breakthrough Adaptive Sensor Technology (AST).

FCl’s innovative AST thermal mass flow technology for the ST80 flow
meters features an innovative hybrid sensor drive. This patent-pending
measuring technique combines, for the first time, both of the industry’s highly
proven constant power (CP) and constant temperature (CT) thermal dispersion
sensing technologies in the same instrument. Complementing this new measurement
drive technique are a choice of four different flow sensor element designs to
further ensure best installed performance, including FCI’s new wet gas
solution.

When operating in AST mode, the new ST80 flow meters measure in CT
during start-up and through the lower flow ranges, and will then seamlessly
shift into CP mode at mid-range and higher flow rates. The result is a ‘best of
both technologies’ performance level where the advanced ST80 meters deliver
extremely fast response with extended measuring ranges, at low power
consumption to maximise sensor reliability and reduce instrument energy
expenses.

The ST80 flow meters feature FCI’s rugged no-moving parts flow element
design, which provides direct mass flow measurement with just a single process
penetration. This approach saves the plant real estate space and eliminates
unnecessary installation labour and other expenses. It also prevents the
performance degradation encountered with other flow technologies, which require
the addition of expensive temperature and pressure sensors to compute an
inferred mass flow.

With no moving parts to plug or foul and clean, the ST80 flow meters
deliver extensive lifecycle cost savings over higher maintenance technologies.
The result is accurate and highly repeatable mass flow measurement at the
lowest total installed cost. In today’s complex process control schemes, the
ST80 flow meters provide the accurate air and gas flow measurements essential
for process consistency, quality, plant safety and environmental compliance.

Designed for performance, the ST80 flow meters are accurate to ±1% of
reading, ±0.5% of full scale and repeatability of ±0.5% of reading. The
turndown ratio is factory preset to meet the requirements of the application
from a minimum of 2:1 up to 100:1. This meter series operates over a wide flow
range; the insertion style configuration range is: 0,07 to 305 NMPS; the in-line
style configuration range is: 0,01 to 3140 NCMH.

While a single calibration is sufficient for many processes, the ST80
meters can optionally provide two unique calibration groups. Depending on the
application need, this feature can provide significant cost and time savings. For
example, the meter can be calibrated for two different compositions of mixed
gases or two completely different gases. This is especially helpful in
processes that are seasonally affected by environmental temperature changes, such
as wastewater treatment digester gas and landfill gas reporting or recovery
systems.

A three-point calibration drift self-test feature is built-in standard
with all ST80 flow meters. The tests, run at a low, mid and upper points across
the flow range, can be performed on demand from the front panel buttons or
programmed to run automatically based on day and time to save the user time and
maintenance expense. The self-test is performed in-situ – there is never a need
for the ST80 meter to be removed or retracted from process piping, or to
suspend the processes’ operation. There are no unnecessary spares sitting on
the shelf and shipping costs and lab fees for unneeded recalibration service.

The ST80 Series features multiple outputs to interface with control
systems and/or set-up or configuration devices. The standard ST80 meter
configuration includes: dual 4-20 mA, NAMUR NE43 compliant analogue outputs,
HART (version 7) and Modbus 485. Optionally available are: Foundation Fieldbus
and PROFIBUS PA. All digital bus communications are full two-way I/O.

The easy-to-use ST80 Series is offered in three styles: (1) no display,
(2) with display, or (3) with display and through-the-glass user programming
buttons. The display is a best-in-class, backlighted information LCD. It
provides users with both digital and bar graph readout of the processes flow
rate and temperature, totalised flow, alarm conditions, diagnostics feedback
and even a user defined label field.

The versatile ST80 flow meters are offered in a wide range of process
connection, mounting and installation options including compression fittings,
flanged and packing glands and with the transmitter/electronics integrally
mounted with the flow element or remote mounted up to 1000 feet (300m) apart.
They are suitable for a wide range of applications in pipe diameters from 1 to
99‚Äâinches (25 to 2500 mm) – from compressed air to hydrocarbon gases, single
process or speciality gases to biogas mixtures and more. The meter is available
for media temperature service up to 850¡F (454¡C). The ST80 transmitter
enclosure is NEMA 4X/IP67 rated, selectable for NPT or metric conduit port
threading and is available in both aluminium and stainless steel.

The ST80 can be ordered for either 24 Vdc or AC input power. The 24 Vdc unit is a fully isolated DC supply that operates over a wide 19.2 Vdc to 28.8
Vdc range. The AC powered unit will operate from 85 to 265 Vac to ensure
universal operation throughout the world. As with all FCI thermal flow meters,
the ST80 meter requires less than 10 Watts maximum power, which is typically
half that of other thermal flow meters, minimising plant energy cost and
enhancing the service life of the meter.

The ST80 Series flow meters feature extensive global HazEx agency safety
approvals for potentially dangerous environment installations. FCI products
undergo rigorous agency testing and obtain their approvals on the entire
instrument, not just the enclosure. Approvals include: FM, FMc, ATEX, IECEx,
and the meter is CE marked. CPA, NEPSI, EAC (TR CU) and CRN approvals have been
submitted and are pending. The ST80 meter also has been independently evaluated
to meet and comply as a SIL 1 device.

For further information, please visit the AMS Instrumentation and
Calibration website www.ams-ic.com.au
or call 03-9017 8225, or Freecall (NZ) 0800 442 743.

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