
1-32
Operation Manual
The document includes analysis and discussion of the sources of error / measurement eects due to:
Balance system calibration.
Absorbing (or reecting) target suspension mechanisms.
Linearity of the balance system.
Extrapolation to the moment of switching the ultrasonic transducer (compensation for ringing
and thermal drift).
Target imperfections.
Absorbing (reecting) target geometry and nite target size.
Target misalignment.
Ultrasonic transducer misalignment.
Water temperature.
Ultrasonic attenuation and acoustic streaming.
Coupling or shielding foil properties.
Plane-wave assumption.
Environmental inuences.
Excitation voltage measurement.
Ultrasonic transducer temperature.
Eects due to nonlinear propagation and saturation loss.
The overall ndings of the analysis give a rough Acoustic Power accuracy gure of +/- 10% for
the frequency range of 1 - 10 MHz.
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