Dwyer Instruments AVUL Specifications

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SERIES AVUL

AIR VELOCITY TRANSMITTER

3% and 5% Models, Optional BACnet or Modbus® Communication Protocols

AIR QUALITY

The SERIES AVUL Air Velocity Transmitter quickly and accurately measures air

velocity or volumetric ow in imperial or metric units. Simultaneous current and voltage outputs on all models provide universal inputs to monitoring equipment while the output range, units, and 0 to 5/10 VDC output can be congured via local DIP switches. The optional integral display, or the portable remote display tool, provide a convenient way to locally monitor process values and congure the unit.

Models are available in 3% and 5% accuracy models to suit a variety of needs, and the optional BACnet MS/TP or Modbus to be daisy-chained while providing access to all of the velocity and ow data, as well as additional information such as air temperature.

FEATURES/BENEFITS

• Sensing elements have been coated with an engineered conformal coating to ensure durability and longevity

• Field selectable ranges can be quickly congured without power to the unit

APPLICATIONS

• VAV systems

• Building ducts

MODEL CHART Model Description AVUL-5DA1

Air velocity transmitter, 5% accuracy, duct mount, Universal current/voltage outputs

AVUL-5DA1-LCD

Air velocity transmitter, 5% accuracy, duct mount, Universal current/voltage outputs, with LCD

AVUL-5DB1

Air velocity transmitter, 5% accuracy, duct mount, BACnet

communications

AVUL-5DB1-LCD

Air velocity transmitter, 5% accuracy, duct mount, BACnet communications, with LCD

AVUL-5DM1

Air velocity transmitter, 5% accuracy, duct mount, Modbus

communications

AVUL-5DM1-LCD

Air velocity transmitter, 5% accuracy, duct mount, Modbus communications, with LCD

AVUL-3DA1

Air velocity transmitter, 3% accuracy, duct mount, Universal current/voltage outputs

AVUL-3DA1-LCD

Air velocity transmitter, 3% accuracy, duct mount, Universal current/voltage outputs, with LCD

AVUL-3DB1

Air velocity transmitter, 3% accuracy, duct mount, BACnet

communications

AVUL-3DB1-LCD

Air velocity transmitter, 3% accuracy, duct mount, BACnet communications, with LCD

AVUL-3DM1

Air velocity transmitter, 3% accuracy, duct mount, Modbus

communications

AVUL-3DM1-LCD

Air velocity transmitter, 3% accuracy, duct mount, Modbus communications, with LCD

RTU/ASCII communication protocol allows units

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SPECIFICATIONS Service: Clean air and non-combustible, compatible gases. Wetted Materials: Consult factory. Range: 1000, 2000, 3000, 4000 FPM (5, 10, 15, 20 m/s); Field selectable. Accuracy: ±(5% of reading + 0.2 m/s) or ±(3% of reading + 0.2 m/s) @ standard

conditions, depending on model.

Temperature Limits: 32 to 122°F (0 to 50°C). Power Requirements: 24 VDC ±20% or 24 VAC ±20%. Humidity Limits: 5 to 95% RH, non-condensing. Output Signals: 4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC. Response Time (90%): 10 s, typical. Zero & Span Adjustments: Digital push buttons. Output Load Resistance: Current output: 0 to 1100 Ω max.; Voltage output:

Minimum load resistance 1 kΩ.

Current Consumption: 60 mA max. Display (optional): 5 digit LCD. Electrical Connections (Analog): Power and output: four wire removable

European style terminal block for 16 to 26 AWG. Communication (optional): Connections: BACnet MS/TP or Modbus

RTU/ASCII: three wire removable European style terminal block for 16 to 26 AWG; Supported baud rates: 9600, 19200, 38400, 57600, 76800, 115200.

Device Load: 1/8th unit load. Electrical Entry: 1/2˝ NPS thread. Accessory (A-151): Cable gland for 5 to 10 mm

diameter cable.

Enclosure Rating: NEMA 4X (IP66). Mounting Orientation: Flow direction must be parallel to the sensor tip. Weight: 6.0 oz (160 g). Agency Approval: BTL, CE.

ACCESSORIES Model Description A-151 A-435-A A-AVUL-LCD A-AVUL-MTG SCD-PS

Cable gland for 5 to 10 mm diameter cable Remote display tool Field upgradeable display Replacement mounting ange 100 to 240 VAC/VDC to 24 VDC power supply

DWYER INSTRUMENTS, INC. | www.dwyer-inst.com

Air Velocity Transmitters

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