Flow Calibration
The E+E accredited calibration bench is unique in Europe and offers flow and volumetric flow calibrations for inline and immersion flow meters at standard conditions in the range from 0.6 to 2300 m³/h (0.35 to 1354 SCFM) in pipes from DN15 to DN80 (1/2 to 3“). The pressure in the calibration bench can be set between 1 and 10 bar (14.5 and 145 psi), which allows for highly accurate calibration under the real conditions in compressed air networks.
The E+E calibration laboratory operates also an accredited low flow calibration bench in the range from 0.06 l/min to 245 l/min at standard conditions. Calibrations can be performed in pipes from DN15 to DN50, at pressures between 1 and 10 bar (14.5 and 145 psi) and for air and non-air gases.
Scope of Accreditation E+E Calibration Laboratory
| Calibration | Calibration object | Measurement conditions | Measurement range | Calibration uncertainty | |
|---|---|---|---|---|---|
| AA 0608 | Lab | Flow sensor/ Flow transmitter | 0.1...1 MPa (1...10 bar) at (23 ±3) °C | Flow rate at standard conditions (0 °C / 1013 mbar) 0.6...2300 m3/h | 0.003 m3/h + 0.9 % of m.v. |
| AA 0608 | Lab | Flow sensor/ Flow transmitter | 0.1...1 MPa (1...10 bar) at (23 ±3) °C | 0.06...245 l/min 1) | 0.12*Q0^2-0.48*Q0+1.66 (for range: 0.06...2.7 l/min) 0.008*Q0^2-0.14*Q0+1.86 (for range: 1.9...9.3 l/min) 0.0007*Q0^2-0.052*Q0+2.4 (for range: 9...46 l/min) 0.00004*Q0^2-0.0018*Q0+1.8 (for range: 45...245 l/min) |
1) also for non-air gases
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.
Inquire Calibration
Accompanying Slip
For efficient processing of your calibration order, please also send us a fully completed accompanying slip with the measuring device to be checked.
