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MT91 Multipoint Air and Gas Mass Flow Meter
for Large Line Sizes and Stacks
Mass Flow Meter SummaryThe MT91 insertion type multipoint mass
flow meter combines FCI's highly reliable thermal dispersion,
no-moving parts flow element design with up to 16 flow sensing
points while operating over a wide temperature range up to 850° F
[454° C]. The electronics features continuous built-in testing and
calibration adjustment to prevent signal drift.
The MT91 multipoint mass flow meter is ideal for installation in air
ducts, stacks, or wherever irregular flow profiles reduce the
effectiveness of single-point metering.
Applications |
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Stack
monitoring for CEMS |
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Flue gas
recirculation monitoring |
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Primary air
flow monitoring |
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Scrubber
and precipitator balancing |
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Combustion
air flow monitoring |
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Air
monitoring to low NOX burners |
SpecificationsFlow Range: 0.25 to 150 sfps
[0.08 to 46 nmps] in
Air at standard conditions of 70° F [21.1° C] and 14.7 psia
[1.01325 bar (a)].
Flow Accuracy: (at calibrated conditions)
± 2% of reading or ± 0.2 sfps [± 0.06 nmps]
Temperature Coefficient:
With optional temperature compensation. Valid from 10% to 100% of full-scale calibration
Flow: Maximum ± 0.015% of reading/ºF up to 850ºF [±0.03% of reading/ºC up to 454 ºC]
Flow Repeatability: ± 0.5% reading
Temperature Accuracy:
From 32° to 212° F [0° to 100° C]: ± 0.9° F [± 0.5° C]
< 32° and > 212° F [< 0° and > 100° C]: ± 1.8° F [± 1° C]
Temperature Repeatability:
From 32° to 212° F [0° to 100° C]: ± 0.2 % reading.
< 32° and > 212° F [< 0° and > 100° C]: ± 0.5% reading.
Turndown Ratio: From 5:1 to 100:1 within the
calibrated flow range.
Temperature Compensation:
Standard: ± 30° F [± -1° C]
Optional: ± 100° F [± 38° C]
Enclosure: (Available in Remote Configuration Only)
Standard: Powder coated aluminum enclosure is rated
for NEMA/CSA Type 4 (equivalent to IP66). An optional
explosion-proof enclosure is available.
Optional: 19 inch rack in accordance with DIN 41494
Part 1, ANSI/EIA-RS-310C.
Agency Approvals: Contact FCI
N.I.S.T. Certified Test Lab Calibration: Standard
Flow ElementMaterials of Construction:
Standard: 316 stainless steel with nickel braze per
specification AMS 4777 for all wetted surfaces.
Optional: Hastelloy C with corrosion-resistant alloy
braze.
Number of Flow Sensing Points per System: Up to 16 points
total.
Process Connection:
Standard: 2 inch male NPT or 3 inch 150 lb. raised
face carbon steel flange.
Optional: Other flange sizes and material types.
Insertion Length: Variable insertion lengths, customer
specified.
Operating Temperature:
Standard: -50° to +350° F [-45° to +177° C]
Optional: -50° to +850° F [-45° to +454° C]
Operating Pressure: To 50 psig [3.4 bar(g)]; design
pressure to 500 psig [34 bar(g)].
Optional Coatings: Electroless nickel, chromium
carbide, Hastelloy C.
Flow TransmitterOperating Temperature:
With LCD Display Activate: 32° to 140° F [0° to 60°
C]
With LCD Display Inactive: 0° to 140° F [-18° to 60°
C]
Input Power: 85 to 265 Vac (47 to 63 Hz), 3.5 amp
fused; 20 to 32 Vdc.
Relay Outputs: 2 DPDT alarm relays rated at 2 amps
and field progammable for flow, temperature
or sensing point failure.
Digital Communication Port: RS-232C, RS-422 or RS-485
field selectable and programmable.
Display: 4 lines, 20 characters per line LCD display.
Keypad: 20 keys for input provide easy touch
programming to change zero, span, switch points, and units
of measurement for instrument verification, troubleshooting
and other critical instrument functions.
Interconnecting Cable: 10 ft. [7.6 m] PVC cable
(standard), custom lengths are available.
Optional Remote Enclosure: Powder coated aluminum
enclosure is rated for NEMA/CSA Type 4 (equivalent to IP66).
An optional 19 inch DIN rack is available.
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