Product Overview | Pressure Transmitter
The North American 8244B Furnace Pressure Transmitter is a highly accurate digital instrument, that converts differential pressure signals into a 4-20mA analog output signal. It is available in nine standard ranges between -3"w.c. to +3"w.c. (-7.5mb to +7.5mb). This unit features HART compatibility allowing quick easy commissioning and the ability to change settings effortlessly. The 8244B includes a 3 valve manifold, mounting bracket, calibration sheet and optional LCD display. The transmitter can be mounted in any orientation and only requires a zero trim prior to being commissioned. The 8244B is typically used in conjuction with a current input controller such as the 8200 North American Combustion Procss Controller or a PLC, and provides stable furnace pressure. Controlling furnace pressure accurately can result in: — Improved product quality — Improved emissions — Maintenance savings by preventing excessive fluing through cracks and doors — Elemination of cold air infiltration, preventing load cold spots — Prevention of furnace atmosphere contamination
Fluid Duty: Air and gas-fired process combustion products, fuel, corrosive gases, or liquids compatible with materials of construction. Output Signal: 4 to 20 mA dc (2-wire loop powered) linear Saturation: Low 3.9 mA, high 20.8 mA Alarm: User selectable by jumper low ≤ 3.75 mA, high ≥ 21.75 mA Temperature Limits: Blind model: Storage: -50 to 230°F Ambient: -40 to 185°F LCD model: Storage: -40 to 185°F Ambient: -40 to 176°F Supply Voltage (external power supply required): 10.5 to 42 Vdc with no load. Communication requires a minimum loop resistance of 250 ohms Materials of Construction: Transmitter: Polyurethane painted aluminum Manifold: 316 SST
Mounting: Bracket is supplied for mounting to pipe up to 2” diameter, Polyurethane painted Carbon Steel.
Product Certifications: FM explosion proof and dust-igniton proof, Class I, Division I, Groups B, C, D, Class II, Division I, Groups E, F, G, CE marked Enclosure Rating: NEMA 4X Electrical Conduit Entry Size: ½ " - 14 FNPT Process Connection: ½ " - 14 FNPT Sensor Fill Fluid: Silicone Wetted O-Rings : Glass filled PTFE Damping: Factory set at 3.2 seconds and adjustable betweeen 0 and 60 seconds Optional Display: LCD type, 2 line, 8 digit, first line is actual measured value. Second line is engineering units. Default alternates between engineering units and % of range. The second line is configurable to: 1. Engineering units only
FEATURES
— HART compatible — 3 valve manifold with test ports — Mounting bracket included — 2 wire, loop powered, 4-20mA output — NEMA 4X — FM explosion proof and dust-igniton proof — CE marked — LCD display optional
SPECIFICATIONS
Upper Range Limit (URL): 3"w.c. Lower Range Limit (LRL): -3"w.c. Calibrated (Reference) Accuracy: ±0.10% of span, for spans less than 2:1, accuracy = ± 0.05% of URL (span = 20mA setpoint - 4mA setpoint) URL = 3 Stability: ± 0.2% of URL for 1 year Minimum Span: 0.1"w.c. Temperature Effects: ±(0.25% URL + 0.05% span) per 50°F Mounting Position Effect: Zero shift only; corrected through digital zero trim by HART after unit is mounted Integral Zeroing Means: 3 valve manifold Overpressure and Static Pressure Limit: 750 psig.
2. % of range only 3. Custom display 4. Alternate engineering units and custom display 5. Alternate % of range and custom display
Weight: 11.2 lbs without LCD display 11.7 lbs with LCD display Units:
"w.c. (standard on 8244B), mbar (standard on M8244B) "Hg, ft w.c., mm w.c., mmHg, psi, bar, g/cm 2 , kg/cm 2 , Pa, kPa, torr, atm, "w.c. @ 4°C, mm w.c. @ 4°C.
Bulletin 8244B page 2
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