Fieldpiece AAV3 User Manual
Fieldpiece
Air Velocity and
Air Temperature
Accessory Head
Model: AAV3
OPERATOR’S MANUAL
Description
The model AAV3 accessory head is designed to
measure air velocity and air temperature. It can be
used to estimate CFM (cubic feet/minute). You can
measure air velocity in feet/minute, miles/hour,
meters/second, or kilometers/hour. The AAV3 also
measures temperature in ºC or ºF.
How to use
1. Connect to COM and Volts jack. Slide AAV3 air
velocity and temperature accessory head onto
Fieldpiece "stick" meter, data logger, electronic
handle or connect to most other meters using
Fieldpiece ADLS2 deluxe test leads.
2. Set meter to 200mVDC or 2000mVDC range.
3. Power on the AAV3 and select English or met-
ric along with desired unit of measure.
4. Select display mode. Average shows a steady,
average of the last 16 seconds of readings.
Real time shows every reading and will change
immediately if there is a change in air velocity.
(Note: temperature readings are always in real
time regardless of the setting.)
5. If the green “LCD x 100” LED lights up on the
AAV3, you must multiply the LCD reading by
100 to get the true value.
Use it your way
EHDL1 AHDL1 w/ Meter DL3 HS30
Specifications
Range (wind velocity): 60-5900 Ft/min, 0.7-67.0
mph, 0.3-30.0 M/s, 1-108 KM/hr
Accuracy (wind velocity): ±3% + 1digit @
73ºF±5ºF (23°C±2°C), <95% relative humidity
Range (temperature): -20ºC to 60ºC, -4ºF to
140ºF
Accuracy (temperature):
±1ºF at 32ºF to 113ºF;
±2ºF at -4ºF to 32ºF, 113ºF to 140ºF
(±0.5ºC at 0ºC to 45ºC;
±1ºC at -20ºC to 0ºC, 45ºC to 60ºC)
Resolution: ±0.1ºF/C
Operating temperature: 32 to 120 ºF (0-49°C)
Operating relative humidity: <95%RH
Storage temperature: -4 to 140ºF (-20 to 60°C),
0 to 80% R.H. with battery removed from meter.
Sensor type: Thermistor temperature sensor
Battery life: 200 hours typical. No measurable
current draw when in "off" position.
Low battery indication: Red LED
Battery: 9V
Auto off: Approx. 10 minutes.
Volumetric Flow
There is no substitute to using a hood to measure volumetric flow (CFM or L/s). The AAV3 can,
however, be used to estimate volumetric flow.
Volumetric flow equals air velocity (in feet/minute or
meters/second) multiplied by the free area (in
square feet or square meters). The AAV3 measures
air velocity. Then all you need is the size of the
opening or "free area" to find volumetric flow.
Air velocity: Because the air velocity is different
at different points of the register, it may be best to
estimate the average air velocity by averaging the
readings from several spots. A common method is
to take readings from nine different spots and average them. The DL3 data logger can make finding
the average very easy. Just take several data points
by pressing a button on the data logger then read
the average from the LCD.
Free area: Free area is the area of the register
that air can move through. Estimate free area by
measuring the open area of the register in feet or
meters (including the fins, excluding the border).
For CFM: Multiply the free area by the air velocity to get CFM. For example a register that has an
open area that is 12 inches (one foot) by 6 inches
(one half foot) has a free area of 1ft x 1/2ft = 1/2 ft2.
If the average air velocity is 600 ft/min, then the
CFM is 600 ft/min x 1/2 ft2 = 300 CFM.
For L/s: Multiply the free area by the air velocity
to get L/s. For example a register that has an open
area that is 0.3 meters (30cm) by 0.15 meters
(15cm) has a free area of 0.3m x 0.15m = 0.045 m
2
.
If the average air velocity is 3 m/s, then the L/s is 3
m/s x 0.045 m2x 1000 L/m3= 135 L/s.
Make it easy with the data logger
Use your AAV3 with the DL3 data logger. Press
the RECORD button a few times on the DL3 data
logger to log a few readings and then just press
AVG to find your average air velocity.
One year limited warranty
This head is warranted to the original purchaser
against defects in material and workmanship for a
period of one year from the date of purchase.
During the warranty period, Fieldpiece will replace
or repair the defective unit, subject to verification of
the defect.
Any damage to the sensor from dirt, mechanical
abuse, or overexposure to damaging chemicals,
including overexposure to carbon monoxide, are
not covered under this warranty. Also not covered
are defects resulting from abuse, neglect, accident,
unauthorized repair, alteration, or unreasonable
use.
Any implied warranties arising out of the sale of
a Fieldpiece Instrument, including but not limited to
implied warrenties of merchantacility and fitness for
a particular purpose, are limited to the above.
Fieldpiece shall not be liable for loss of use of the
instrument or other incidental or consequential
damages, expenses, or economic loss, or for any
claim or claims for such damage, expense, or economic loss.
Local laws vary. Above limitations or exclusions
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights
which vary by location.
Service
Return any defective AAV3 to Fieldpiece for warranty service along with proof of purchase. Contact
Fieldpiece for out of warranty repair charges.
Fieldpiece Instruments, Inc.
California, U.S.A.
www.fieldpiece.com
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Free area length
Free area width
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