Series AVUL Air Velocity Transmitter with Modbus
®
Communication
Specifications - Installation and Operating Instructions
Bulletin P-AVUL-M
The
Series AVUL
Air Velocity Transmitter
quickly and accurately measures air
velocity or volumetric flow 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 configured via local DIP switches.
The optional integral display, or the portable remote display tool, provide a convenient
way to locally monitor process values and configure 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
®
RTU/ASCII communication protocol allows units
to be daisy-chained while providing access to all of the velocity and flow data, as well
as additional information such as air temperature.
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 r 0.2 m/s) or ±(3% of r 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:
4-20 mA, 0-5 VDC, 0-10 VDC.
Response Time (90%):
10 s, typical.
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 (Optional):
5 digit LCD.
Electrical Connections (Analog):
Power and output: 4-wire removable European
style terminal block for 16 to 26 AWG.
Communication (Optional):
Connections: BACnet MS/TP or Modbus
®
RTU/ASCII:
3-wire removable European style terminal block for 16 to 26 AWG; Supported baud
rates: 9600, 19200, 38400, 57600, 76800, 115200.
Device Load:
1/8 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;
See Installation section for details.
Weight:
6.0 oz (160 g).
Agency Approval:
CE.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219-879-8000
Fax: 219-872-9057
www.dwyer-inst.com
e-mail: [email protected]
1/2 NPS
2-43/64
[67.92]
3-49/64
[95.71]
3-3/16
[80.81]
31/32 [24.58]
1-19/32
[40.59]
2-5/32
[54.82]
7-41/64
[194.07]
3-33/64
[89.13]
7-17/64
[184.60]
39/64
[15.32]
Ø15/32
[11.84]
MODEL CHART
Model
AVUL -3 D A1 -LCD AVUL-3DA1-LCD
Accuracy
5
3
±(0.2 m/s + 5% of reading) @ standard
conditions
±(0.2 m/s + 3% of reading) @ standard
conditions
Mounting
D
Duct mount
Output
A1
B1
M1
Analog universal (0-5 VDC, 0-10 VDC, 4-20
mA)
BACnet MS/TP
Modbus
®
RTU/ASCII
Options
LCD
FC
NIST
GLD
SF
LCD display
Factory calibration certificate
NIST certificate
Electrical cable gland
Silicone free
®
