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Specifications
Models 8455, 8465, 8475
Accuracy.........................
Repeatability...................
Response Time to Flow...
Common specifications to all models
Field Selectable Velocity Ranges
Model 8455/8465
Model 8475
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, 0-20 mA, 4-20 mA
Output Time Constant (field selectable)............ 0.05 to 10 seconds.
Probe Length ............... 7.5 cm, 15 cm, 21.5 cm or 30 cm (3 in, 6 in, 9 in or 12 in)
Temperature
1
from 18 to 28°C (64.4 to 82.4°F), outside this range add 0.2% per °C (0.11% per
°F), within temperature compensation range.
2
from 20 to 26°C (68 to 78.8°F), outside this range add 0.5% per °C (0.28 % per
°F), within temperature compensation range.
3
Standard deviation based on one minute average from 0.5 to 5.0 m/s (100 to 1000
ft/min).
4
For 63% of final value, tested at 7.5 m/s (1000 ft/min).
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 0.25 m/s
(50 ft/min). Directional sensitivity of the Model 8475 is +5%/-20% of reading
+0/-0.05 m/s (+0/-10 ft/min) over 270° solid angle regardless of flow direction.
8455
±2.0% of
1
reading
±0.5% of full
scale of selected
range
<±1.0% of
3
reading
4
0.2 sec
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 (25 ft/min to 200,
250, 300, 400, 500, 750, 1000, 1250, 3000, 4000, 5000,
7500, 10000 ft/min)
0.05 m/s to 0.5, 0.75, 1.00, 1.25, 1.50, 2.0, 2.5 m/s
(10 ft/min to 100, 125, 150, 200, 250, 300, 400, 500 ft/min)
Compensation Range: 0 to 60°C (32 to 140°F)
Sensor Operation: 0 to 93°C (32 to 200°F)
Electronics Operation: 0 to 93°C (32 to 200°F)
Storage: 0 to 93°C (32 to 200°F)
8465
±2.0% of
1
reading
±0.5% of selected
full scale range
<±1.0% of
3
reading
4
0.2 sec
21
8475
±3.0% of
2
reading
±1.0% of selected
full scale range
NA
4
5 sec
5
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