Series AVLV Low Air Velocity Transmitter with Modbus
®
Communication
Specifications - Installation and Operating Instructions
Bulletin P-AVLV-M
The
Series AVLV Low 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 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 flow 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, 2.0 m/s; field 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 & 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 AWG; Communication: Connections: BACnet MS/
TP or Modbus
®
RTU/ASCII: three wire removable European style terminal block for
16 to 26 AWG.
Supported Communication Baud Rates:
9600, 19200, 38400, 57600, 76800,
115200 (optional).
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 Approval:
BTL, CE.
Do not dispose of as unsorted domestic or municipal waste. Consult
retailer or local authorities for recycling information.
Modbus
®
is a registered trademark of Schneider Automation, Inc.
ACCURACY CHART
Velocity Range
Accuracy Rating*
20 to 100 FPM (0.15 to 0.5 m/s)
20 to 200 FPM (0.15 to 1.0 m/s)
20 to 300 FPM (0.15 to 1.5 m/s)
20 to 400 FPM (0.15 to 2.0 m/s)
± (2% of r 0.04 m/s [7.9 FPM])
± (1% of r 0.04 m/s [7.9 FPM])
± (2% of r 0.04 m/s [7.9 FPM])
± (1% of r 0.04 m/s [7.9 FPM])
± (2% of r 0.05 m/s [9.8 FPM])
± (1% of r 0.05 m/s [9.8 FPM])
± (2% of r 0.06 m/s [11.8 FPM])
± (1% of r 0.06 m/s [11.8 FPM])
*Accuracy dependent on model selected when ordering.
®
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]
MODEL CHART
Model
AVLV -3 D A1 -LCD AVLV-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 to 10 VDC,
4-20 mA)
BACnet MS/TP
Modbus
®
RTU/ASCII
Options
LCD
FC
NIST
GLD
LCD display
Factory calibration certificate
NIST certificate
Electrical cable gland
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]
