TSI 8455 Manuel D'utilisation page 27

Specifications
Models 8455, 8465, 8475
Accuracy ...........................
Repeatability .....................
Response Time to Flow ...
Common specifications to all models
Field Selectable Velocity Ranges
Model 8455/8465 ........... 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,
Model 8475 .................... 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, 350 mA 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 .................. Compensation Range:
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. 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.
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
For 63% of final value, tested at 2.5 m/s (500 ft/min).
6
Input voltage must be maintained within specifications at the transducer.
Calibration occurs with sensor oriented horizontally in a horizontal air flow.
8455
±2.0% of reading
±0.5% of full scale
of selected range
<±1.0% of
3
reading
4
0.2 sec
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, 1500, 2000, 2500,
3000, 4000, 5000, 7500, 10000 ft/min)
(10 ft/min to 100, 125, 150, 200, 250, 300, 400, 500 ft/min)
Sensor Operation:
Electronics Operation:
Storage:
21
8465
1
±2.0% of reading
±0.5% of selected
full scale range
<±1.0% of
3
reading
4
0.2 sec
0 to 60°C (32 to 140°F)
0 to 93°C (32 to 200°F)
0 to 93°C (32 to 200°F)
0 to 93°C (32 to 200°F)
8475
1
±3.0% of reading
±1.0% of selected
full scale range
NA
5
5 sec
6
2