Dwyer Instruments SERIES AVLV Data Sheet

SERIES AVLV | LOW AIR VELOCITY TRANSMITTER

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

DESCRIPTIONAPPLICATIONS

• VAV systems

• Building ducts

• Clean room systems

The Series AVLV Low 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 0-5/10 VDC output can be congured via local DIP switches. The optional integral display, or the portable remote tool, provide a convenient way to local monitor process values and congure the unit.

Models are available in 1% and 2% accuracy models and low velocity ranges to suit a variety of needs, and the optional BACnet MS/TP or Modbus® RTU/ASCII communication protocol allows units to be daisy-chained while providing access to all of the velocity and ow data, as well as additional information such as air temperature. The lower ranges in these high accuracy units allow for applications in quality intensive environments, such as the pharmaceutical industry.

SPECIFICATIONS

Service Clean air and non-combustible, compatible gases.

Wetted Materials Consult factory.

Range 100, 200, 300, 400 FPM (0.5, 1, 1.5, 2 m/s); eld selectable.

Accuracy See chart.

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 4-20 mA, 0-5 VDC, 0-10 VDC.

ResponseTime(90%) 4 s, typical; 1 s at constant temperature.

Zeroand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 5 digit LCD (optional).

Electrical Connections Analog: Power and output: four wire removable European style terminal block for 16 to 26 A

Connections: BACnet MS/TP or Modbus® RTU/ASCII: three wire removable European style terminal block for 16 to 26 AWG.

SupportedCommunication

Baud Rates

Device Load 1/8 unit load.

Electrical Entry 1/2˝ NPS thread. Accessory: Cable gland for 5 to 10 mm diameter cable, A-151.

Enclosure Rating NEMA 4X (IP66).

Mounting Orientation Flow direction must be parallel to the sensor tip.

Weight 6.0 oz (160 g).

AgencyApprovals BTL, CE.

9600, 19200, 38400, 57600, 76800, 115200. (optional).

WG; Communication:

3-3/16

31/32

24.58

[11.84]

DIMENSIONS WIRING DIAGRAM

3-49/64 [95.71]

3-33/64

[89.13]

1/2 NPS

2-43/64

[67.92]

7-41/64

[194.07]

7-17/64 [184.60]

39/64

[15.32]

Ø15/32

[80.81]

1-19/32

[40.59]

2-5/32 [54.82]

HOW TO ORDER

Use the bold characters from the chart below to construct a product code.

AVLV -2 D A1 -LCD

SERIES

AVLV: Low air velocity transmitter

ACCURACY

-2: ± (2% of reading + 0.06 m/s)

-1: ± (1% of reading + 0.06 m/s)

MOUNTING

D: Duct mount

OUTPUT

A1: Analog universal (0-5 VDC, 0-10 VDC, 4-20 mA) B1: Analog + BACnet MS/TP M1: Analog + Modbus

RTU/ASCII

POWER

1234

ZERO

Current output

1234

ZERO

Voltage output

PWR

GND

IOUT

SW1

VOUT

D1(+)

D0(-)

COM

CURRENT RECEIVER

D0(-)

COM

VOLTAGE RECEIVER

SPAN

OPTIONS

-LCD: LCD display

-FC: Factory calibration certicate

ZERO

1234

SPAN

-NIST: NIST certicate

-GLD: Electrical cable gland

IOUT

VOUT

D1(+)

D0(-)

COM

VOLTAGE RECEIVER

ACCESSORIES

Model Description A-AVLV-LCD A-AVUL-MTG

Field upgradeable display Replacement duct mount plate assembly

POWER

CURRENT RECEIVER

PWR

GND

Simultaneous current and voltage output

Modbus® is a registered trademark of Schneider Automation, Inc.

DWYER INSTRUMENTS, INC.

Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.