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Specifications
Models 8455, 8465, 8475
8455
8465
8475
Accuracy.........................
±2.0% of
reading
1
±2.0% of
reading
1
±3.0% of
reading
2
±0.5% of full
scale of selected
range
±0.5% of
selected full scale
range
±1.0% of
selected full scale
range
Repeatability...................
<±1.0% of
reading
3
<±1.0% of
reading
3
NA
Response Time to Flow...
0.2 sec
4
0.2 sec
4
5 sec
4
Common specifications to all models
Field Selectable Velocity Ranges
Model 8455/8465
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)
Model 8475
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)
Minimum Resolution .. 0.07% of selected full scale
Input Power ................ 11-30 VDC or 18-28 VAC, 350mA max
5
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 .............. 7.5 cm, 15 cm, 21.5 cm or 30 cm (3 in, 6 in, 9 in or 12 in)
Temperature
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)
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.
