User manual | AVT55

Air Monitoring
General Purpose (AVT55)
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Protected probe tip
Rugged ceramic sensor
Wide range of measurement applications
Fast response time
Windowless (AVT65)
Model AVT55
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Less flow blockage
Ideal for measuring in confined spaces
Fast response time
Omnidirectional (AVT75)
AVT55
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AVT65
AVT75
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Omnidirectional probe tip
Accurate at low velocities from 10 to 100 ft/min
(0.05 to 0.5 m/s)
Ideal for unknown or varying flow direction
Applications
Air Velocity Transducers
Models AVT55, AVT65, and AVT75
The AVT55, AVT65, and AVT75 Air Velocity Transducers are ideal
for both temporary and permanent installations for air velocity
measurements in research and development labs, manufacturing
processes, and other applications. The full–scale range, signal output,
and time constant are user selectable and can be easily changed to
meet the needs of your application.
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Rugged. Reliable. Professional.
Comfort and draft studies
Critical environment installations (e.g., clean rooms
and hospitals)
Diffuser design analysis
Monitoring drying processes
Monitoring air flows in tunnels and subways
Used as a standard in wind tunnels and calibration facilities
Environmental monitoring in greenhouses and
IAQ applications
General engineering applications
Air Monitoring
Air Velocity Transducers
Models AVT55, AVT65, AVT75
All models contain on-board electronics and calibration curves
that provide a linear signal output. This linear signal is sent out as
either a current (mA) or a voltage (V) signal, allowing output to a variety of data loggers or data acquisition systems. In addition,
the current and voltage output ranges are user-selectable for
your convenience.
2.35 in. (6.0 cm)
Cable
16.4 ft (5.0 m)
Specifications
Models AVT55, AVT65, AVT75
Accuracy
AVT55
AVT65
AVT75
3.16 in.
(8.0 cm)
±2.0% of reading1, ±0.5% of full scale of selected range
±2.0% of reading1, ±0.5% of full scale of selected range
±3.0% of reading2, ±1.0% of full scale of selected range
4.95 in.
(12.6 cm)
Field Selectable Range
AVT55 and AVT 65 25 ft/min to 200, 250, 300, 400, 500, 750, 1,000, 1,250,
1,500, 2,000, 2,500, 3,000, 4,000, 5,000, 7,500,
10,000 ft/min (0.125 m/s to 1.0, 1.25, 1.50, 2.0, 2.5, 3.0,
4.0, 5.0, 7.5, 10.0, 12.5, 15.0, 20.0, 25.0, 30.0, 40.0,
50.0 m/s)
AVT75
10 ft/min to 100, 125, 150, 200, 250, 300, 400,
500 ft/min (0.05 m/s to 0.5, 0.75, 1.0, 1.25, 1.50, 2.0,
2.5 m/s)
Repeatability
AVT55 and AVT 65
AVT75
<±1.0% of reading3
N/A
Response to Flow
AVT55 and AVT 65
AVT75
0.2 sec4
0.2 sec5
8465/8475
.25 in.
(6.4 mm)
0.180 in.
(4.6 mm)
3 in. (7.5 cm), 6 in. (15.0 cm)
9 in. (22.5 cm), 12 in. (30.0 cm)
1.25 in.
(3.2 cm)
8455
.25 in.
(6.4 mm)
1.33 in.
(3.4 cm)
3 in. (7.5 cm), 6 in. (15.0 cm)
9 in. (22.5 cm), 12 in. (30.0 cm)
AVT55/AVT65
AVT75
Temperature Range
Compensation
32 to 140°F (0 to 60°C)
Operating (electronics)
32 to 200°F (0 to 93°C)
Operating (sensor) 32 to 200°F (0 to 93°C)
Storage
32 to 200°F (0 to 93°C)
Range
25 to 10,000 fpm (0.127 10 to 500 fpm (0.05 to
to 50.8 m/s), selectable
2.54 m/s), selectable
Accuracy
Resolution (minimum)
0.07% of selected full scale
±2% of reading at 64.4 to ±3% of reading at 68.0 to
82.4°F (18 to 28°C ) 82.4°F (20 to 26°C) +1%
+0.5% of full scale of
of full scale of selected
selected range)
range)
Response time
Input power
Input Power
11-30 VDC or 18-38 VAC, 350 mA max6
0.2 seconds
11 to 30 VDC or 18 to 28 VAC, 350 mA maximum
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Output
Impedance
Resistance
Signal
Time Constant
Voltage mode: less than 1 ohm, 20 mA max source current
Current mode: 500 ohms maximum load
Field selectable 0 to 5V, 0 to 10V, 20 to 10V, 0 to 20 mA,
4 to 20 mA,
Field selectable 0.05 to 10 seconds
Probe Length
3 in., 6 in., 9 in., 12 in. (7.5 cm, 15 cm, 22.5 cm, or 30 cm)
P/N 2980557 Rev A
Copyright © 2007 by TSI Incorporated
Printed in U.S.A.
5.0 seconds
From 64.4 to 82.4°F (18 to 28°C), outside this range and within temperature compensation
range add 0.4% per °F (0.2% per °C).
2 From 68 to 78.8°F (20 to 26°C), outside this range and within temperature compensation range
add 0.9% per °F (0.5% per °C). Directed sensitivity of the Model AVT75 is a +5%/-20% of
reading +0/-10 ft/min (+0/-0.05 m/s) over 270° solid angle regardless of flow direction.
3 Standard deviation based on one minute average from 100 to 1000 fpm (0.5 to 5.0 m/s).
4 For 63% of final value, tested at 1500 fpm (7.5 m/s).
5 For 63% of final value, tested at 500 fpm (2.5 m/s).
6 Input voltage must be maintained within specifications at the transducer.
Specifications subject to change without notice.

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