Dwyer AVPT User guide

Series AVPT Pencil Style Air Velocity Transmitter

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16 [406]

Specications - Installation and Operating Instructions

Bulletin AQ-AVPT-A

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6˝ probe length 12˝ probe length

The Series AVPT Pencil Style Air Velocity Transmitter uses thermal anemometer
technology to provide high accuracy and stable air velocity measurements in imperial

and metric units. The Series AVPT can be congured with either a voltage output or

BACnet MS/TP communication to provide universal inputs to a variety of monitoring

equipment. Models are available with xed cable lengths of 20 or 78 inches with ying
leads or a 5-pin M12 connector on a 24 inch cable. Probes are available in lengths
of 6 or 12 inches. A mounting ange included with the product provides the ability to

vary insertion depth.

Models are available in 3% or 5% accuracy to suit a variety of applications, while the
optional BACnet MS/TP communication protocol allows units to be daisy-chained to

provide access to all of the velocity and temperature measurements.

MODEL CHART

Example AVPT -S 03 C1 A 06 127 -FC AVPT-S03C1A06127-FC
Series AVPT Pencil style air velocity

Accuracy S

H

Velocity

Range

Electrical
Connection

Output Type A

Probe
Length

BACnet

Address
Options FC

01
02
03
04
05
10

15

20

C1

C2

M1

B

06
12

127 000-127 whole integer

transmitter
Standard ±5% of reading

+40 FPM
High accuracy ±3% of
reading +40 FPM
1000 FPM
2000 FPM
3000 FPM
4000 FPM

5 m/s

10 m/s

15 m/s

20 m/s
Cable whip 20˝ (0.5 m)
Cable whip 78˝ (2 m)
M12 24˝ (0.6 m)
Analog 0-5 V and 0-10 V

BACnet MS/TP

6˝
12˝

with BACnet output
Factory calibration
certicate

NIST

NIST traceable certicate

16 [406]

SPECIFICATIONS

Service: Clean air.

Ranges: 1000, 2000, 3000, or 4000 FPM (5, 10, 15, or 20 m/s); Model specic.
Accuracy: Standard: ±(5% reading +40 FPM); High accuracy: ±(3% reading +40

FPM); Model specic.

Power Requirements: 24 VAC/VDC ±20%.
Current Consumption: < 50 mA.
Outputs: Analog: 0-10 V (0-5 V congurable).

BACnet MS/TP: Selectable at time of order.

Supported Baud Rate: 9600, 19200, 38400, 57600, 76800, and 115200.
Voltage Output Load Resistance: 10k Ω minimum (10 V output with AC supply);

1k Ω minimum all other conditions.
Electrical Connection: Cable: Plenum rated cable with 22 AWG conductors.

5-Conductor Cable whip: 20˝ (0.5 m) or 78˝ (2 m).
5-pin M-12: 24˝ (0.6 m); model specic.

Response Time (90%): 4 s, typical.

Operational Temperature Limits: -4 to 140 °F (-20 to 60 °C).
Storage Temperature Limits: -40 to 140°F (-40 to 60°C).
Probe Length: 6˝ or 12˝; model specic.
Enclosure Rating: NEMA 3.
Mounting Orientation: Flow direction must be parallel to the sensor tip; See

Installation section for details.

Weight: 1.4 oz (40 g); based on M12 connection with 12˝ probe length.
Agency Approvals: CE, RCM, BTL, UL plenum rated (UL tested).

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Phone: [phone]

Fax: [phone]

www.dwyer-inst.com

e-mail: [e-mail]

INSTALLATION

VCOM (BRN)

VCOM (BRN)

Included Duct Mount Flange:

The transmitter should be mounted away from fans, corners, heating and cooling
coils, and other equipment that will affect the measurement of the air velocity. It is
recommended that the AVPT is mounted at least 10 duct diameters downstream of any

disturbances and 5 duct diameters upstream of any disturbances, if possible.

1. Mark and drill a 0.750-0.938˝ (20-24 mm) diameter hole into the duct.

2. Insert and center the duct mount ange in the previously drilled hole and mark
location of the three mounting screw holes.

3. Remove the mounting ange and drill or punch the mounting holes in the marked

locations.

4. Fasten the ange to the duct using three #8 x 1/2˝ pan head sheet metal screws.
Do not over tighten screws.

5. Insert the AVPT probe into the duct mount ange and set the desired insertion

depth.

6. Note the ow direction and unit alignment as shown on sensor tip and product
label, tighten probe retention set screw on the duct mount ange to afx the probe

in place.

Voltage Output Operation:

CAUTION

RESULT.

The minimum receiver load for the voltage output model is 1 kΩ except when using
an AC supply and 10 V output, where 10 kΩ should be used. The resistance due to
the wire should be low compared to the receiver load resistance. While the voltage
at the device remains unchanged with a full load current ow, resistive losses in the
wiring do cause errors in the voltage delivered to the receiver. For example, a 1%
accurate gage, the resistance of the wires should be less than 0.1% of the value of

the receiver load.

The conguration wire may be left unconnected for default 0-10 V output operation as
seen in Figure 2, or connected to power supply common to congure a 0-5 V output
operation as seen in Figure 3.

DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS.
PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL

Electrical Connection:

The cable supplied with the analog voltage output version of the Series AVPT allows
access to the device power and the voltage output signal. An additional signal is also
provided to congure the voltage output (0-10 V/0-5 V) .

Power Supply:

Choose a power supply with a voltage and current rating sufcient to meet the power
specications under all operating conditions. If the power supply is unregulated, make
sure the output voltage remains within the required voltage range under all power line
conditions. Ripple on the supply should not exceed 100 mV.

When using an AC supply with the analog output, be sure that the supply common
is adequately grounded or DC referenced to allow minimum of ripple or noise on the

analog signal.

DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS.

CAUTION

RESULT.

PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL

PWR (RED)GND (BK)

+

POWER

-

Figure 1: Power supply wiring

PWR (RED)

GND (BK)

POWER

Figure 2: 10 V output wiring

PWR (RED)

GND (BK)

CFG (WH)

+

POWER

For models ordered with optional M-12 electrical connections. Reference Table 1 for
wiring color and pinout designation.

-

Figure 3: 5 V output wiring

Wire Color M-12 Pin
White

Black

Green

Brown

Red

Table 1: M-12 wiring pinout

VOUT (GRN)

CFG (WH)

VOLTAGE
RECEIEVER

VOUT (GRN)

+

-

1

2

3

4

5

VOLTAGE
RECEIVER

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

MAINTENANCE/REPAIR

Upon nal installation of the Series AVPT, no routine maintenance is required; though
sensor should be kept clean and free of dirt or debris.

This symbol indicates waste electrical products should not be disposed
of with household waste. Please recycle where facilities exist. Check with

your Local Authority or retailer for recycling advice.

WARRANTY/RETURN

Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact
customer service to receive a Return Goods Authorization number before shipping the
product back for repair. Be sure to include a brief description of the problem plus any

additional application notes.

Printed in U.S.A. 12/19 FR# 444543-00 Rev. 1©Copyright 2019 Dwyer Instruments, Inc.

Phone: [phone]

Fax: [phone]

www.dwyer-inst.com

e-mail: [e-mail]