User Guide

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 DL2 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, <95% relative humidity
Range (temperature): -20ºC to 60ºC, -4ºF to
140ºF
Accuracy (temperature):
±0.5ºC at 0ºC to 45ºC;
±1ºC at -20ºC to 0ºC, 45ºC to 60ºC;
±1ºF at 32ºF to 113ºF;
±2ºF at -4ºF to 32ºF, 113ºF to 140ºF
Resolution: ±0.1ºF
Operating temperature: 32 to 120 ºF
Operating relative humidity: <95%RH
Storage temperature: -4ºF to 140ºF, 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.
Air Velocity
& Temperature
Head
English
READLO BATT
ON
LCD X
100
Average
(16 sec)
Metric
Real
time
AAV3
AUTO-
OFF
English Metric
Ft/min M/s
KM/hrMPH
ºF ºC
OFF
OFF
2000
Air Velocity
& Temperature
Head
English
READLO BATT
ON
LCD X
100
Average
(16 sec)
Metric
Real
time
AAV3
AUTO-
OFF
English Metric
Ft/min M/s
KM/hrMPH
ºF ºC
OFF
Air Velocity
& Temperature
Head
English
READLO BATT
ON
LCD X
100
Average
(16 sec)
Metric
Real
time
AAV3
AUTO-
OFF
English Metric
Ft/min M/s
KM/hrMPH
ºF ºC
OFF
Air Velocity
& Temperature
Head
English
READLO BATT
ON
LCD X
100
Average
(16 sec)
Metric
Real
time
AAV3
AUTO-
OFF
English Metric
Ft/min M/s
KM/hrMPH
ºF ºC
OFF
Air Velocity
& Temperature
Head
English
READLO BATT
ON
LCD X
100
Average
(16 sec)
Metric
Real
time
AAV3
AUTO-
OFF
English Metric
Ft/min M/s
KM/hrMPH
ºF ºC
OFF
CFM = (air velocity) x (free area)
There is no substitute to using a hood to meas-
ure cubic feet per minute (CFM). The AAV3 can,
however, be used to estimate CFM. CFM equals air
velocity (in feet/minute) multiplied by the free area
(in square feet). The AAV3 measures air velocity.
Then all you need is the size of the opening or "free
area" to find CFM.
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 aver-
age them. The DL2 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. You can estimate free
area by measuring the open area of the register in
feet (including the fins, excluding the border).
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 ft
2
. If the
average air velocity is 600 ft/min, then the CFM is
600 ft/min x 1/2 ft
2
= 300 CFM.
Make it easy with the data logger
Use your AAV3 with the DL2 data logger. Press
the RECORD button a few times on the DL2 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
PRODUCT, INCLUDING BUT NOT LIMITED TO
IMPLIED WARRANTIES OF MERCHANTABILITY
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, EXPENSES, OR
ECONOMIC LOSS.
Local laws vary. Above limitations or exclusions
may not apply to you. This warranty gives you spe-
cific legal rights, and you may also have other rights
which vary by location.
Obtaining service
Call Fieldpiece for an RMA# and send freight
prepaid to Fieldpiece.
For warranty service, include proof of purchase
date. For out of warranty service, include a check or
money order for $45. We will pick up the shipping to
you using the same method used to send it to us.
Fieldpiece Instruments, Inc.
580 West Central Ave. Suite A
Brea, CA 92821
Phone: [phone] Fax: [phone]
www.fieldpiece.com
OFF
Air Velocity
& Temperature
Head
English
READLO BATT
ON
LCD X
100
Average
(16 sec)
Metric
Real
time
AAV3
AUTO-
OFF
English Metric
Ft/min M/s
KM/hrMPH
ºF ºC
OFF
600.0
AVG
mV
f/s
# 0009
R9C
OPTICAL
INTERFAC
E
RS232C
OFF
mACV
mDCV
200
2000
SEND
READ
200
2000
TIME
SPAN
PER
PARA
MULT
9 pin serial port
You can even upload
your data sets to a PC.
Free area length
Free area width