Calibrate air velocity
The air velocity measurement devices are calibrated by comparison with a laser Doppler anemometer in a homogeneous, reproducible wind tunnel flow.
The E+E accredited calibration laboratory employs two tunnels for the air velocity range up 40m/s (8000 ft/min) and up to 2 m/s (400 ft/min) respectively.
E+E Elektronik maintains also the designated NMI laboratory responsible for the Austrian national standard for air flow velocity.
Scope of Accreditation E+E Calibration Laboratory
| Calibration | Calibration object | Measurement conditions | Measurement range | Calibration uncertainty | |
|---|---|---|---|---|---|
| NMI | Labor | Special calibration of air velocity measuring instruments in the designated lab BEV/E+E | |||
| AA 0608 | Labor | Measuring instruments for recording air velocity | (23 ± 3) °C | (0.04 to 2) m/s | (0,004 + 0,0047*MW) m/s |
| AA 0608 | Labor | Measuring instruments for recording air velocity | (5 to 80) °C | (0.3 to 40) m/s | (0,004 + 0,0047*MW) m/s |
Calibration procedure
For the calibration of air velocities of 0.04 m/s to 2 m/s, a vertical wind tunnel is used with an Eiffel design (open circuit). The measurement path with a closed design is square, with a side length of 25 cm and produces a very homogeneous low-turbulence flow profile.
For the calibration of air velocities of 0.3 m/s to 40 m/s, a horizontal wind tunnel is used with an Göttinger design (closed circuit). The measurement path is round, with a diameter of 25 cm and produces a very homogeneous low-turbulence free steel profile.
The temperature in the wind tunnel can be regulated via a heat exchanger in the measurement volume in a temperature range of 5 °C to 80 °C.
A Laser Doppler Anemometer (LDA) is used as a reference for the measurement of the flow velocity.
Order / Inquire Calibration
| Downloads | Kategorie |
|---|---|
Brochure Calibrationservice1437.75 kb |
General |
Accompanyslip AA0608 Calibrationservice32.4 kb |
General |