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Specifications
Accuracy
Repeatability
Response Time to Flow
Common specifications to all models
Field Selectable Velocity Ranges
AVT 55/65
25 fpm to 200, 250, 300, 400, 500, 750, 1000, 1250, 3000, 4000,
5000, 7500, 10000 fpm (0.125m/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)
AVT 75
10 fpm to 100, 125, 150, 200, 250, 300, 400, 500 fpm
(0.05 m/s to 0.5, 0.75, 1.00, 1.25, 1.50, 2.0, 2.5 m/s)
Minimum Resolution .. 0.07% of selected full scale
Input Power ................ 11-30 VDC or 18-28 VAC, 350mA max
Output Impedance...... Voltage mode: less than 1 ohm, 20 mA max source current
Output Resistance ...... Current mode: 500 ohms maximum load resistance
Output Signal (field selectable).....0-5V, 0-10V, 1-5V, 2-10V, 0-20mA, 4-20mA
Output Time Constant (field selectable).......... 0.05 to 10 seconds.
Probe Length .............. 3 in, 6 in, 9 in or 12 in (7.5 cm, 15 cm, 21.5 cm or 30 cm)
Temperature
1
from 64.4 to 82.4°F (18 to 28°C), outside this range add 0.11% per °F
(0.2% per °C), within temperature compensation range.
2
from 68 to 78.8°F (20 to 26°C), outside this range add 0.28% per °F
(0.5% per °C), within temperature compensation range.
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 1000 fpm (7.5 m/s).
5
Input voltage must be maintained within specifications at the transducer.
Calibration occurs with sensor oriented horizontally in a horizontal air flow.
Uncertainty increases in downward vertical flow at velocities less than 50 fpm
(0.25 m/s). Directional sensitivity of the AVT 75 is +5%/-20% of reading
+0/-10 fpm (+0/-0.05 m/s) over 270° solid angle regardless of flow direction.
AVT- 55
±2.0% of
1
reading
±0.5% of full
scale of selected
range
<±1.0% of
3
reading
4
0.2 sec
Compensation Range: 32 to 140°F (0 to 60°C)
Sensor Operation: 32 to 200°F (0 to 93°C)
Electronics Operation: 32 to 200°F (0 to 93°C)
Storage: 32 to 200°F (0 to 93°C)
AVT 65
±2.0% of
1
reading
±0.5% of
selected full
scale range
<±1.0% of
3
reading
4
0.2 sec
19
AVT 75
±3.0% of
2
reading
±1.0% of
selected full
scale range
NA
4
5 sec
5
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