MT91

MASS FLOW METER SUMMARY

The 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
	Stack monitoring for CEMS		Flue gas recirculation monitoring
	Primary air flow monitoring		Scrubber and precipitator balancing
	Combustion air flow monitoring		Air monitoring to low NOX burners

SPECIFICATIONS

Flow 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 ELEMENT

Materials 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 TRANSMITTER

Operating 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: 100 to 240 Vac (47 to 63 Hz), 3.5 amp fused; 24 Vdc (18 to 36 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.