Calibration procedure:

For the calibration of shear sensors, a special shear probe calibration system is used (left). The probe rotates about its axis of symmetry at 1Hz under an angle of attack in a water jet of a constant velocity. At different angles of attack the rms. voltage output of the probe is measured.

The probe sensitivity is the slope of the regression (best fit of a cubic approximation) obtained from the equation:

E is the rms. voltage output of the probe

q is the density of water

U is the velocity of the water jet

α is the angle of attack

S is the shear sensor sensitivity in (Vms2)/kg.

Intercomparison with shear probe calibration systems in U.S.A. and Canada have shown

the accuracy and reliability of the ISW shear probe calibration system. The customer gets a calibration sheet containing the following information:

• Shear sensor sensitivity (in Vms

• Measured shear sensor rms. voltage output at various angles of attack

• Graph og regression as described above

Our News

Download Area

**ISW WassermesstechnikDr. Hartmut Prandke**Am Park 1

D-17213 Fünfseen / OT Petersdorf

Tel.: +49(0) 39932 13189

Copyright © 2010 ISW Wassermesstechnik - All Rights Reserved