Samsung ACCUVIX XG Manual de usuario Pagina 53

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 374
  • Tabla de contenidos
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 52
1-35
Chapter 1 Safety
Acoustic Measurement Precision and Uncertainty
The Acoustic Measurement Precision and Acoustic Measurement Uncertainty are described below.
Quantity Precision Total Uncertainty
PII.3 (derated pulse intensity integral)
3.2 % +21 % to - 24 %
Wo (acoustic power)
6.2 % +/- 19 %
Pr.3 (derated rarefaction pressure)
5.4 % +/- 15 %
Fc (center frequency)
< 1 % +/- 4.5 %
Systematic Uncertainties.
For the pulse intensity integral, derated rarefaction pressure Pr.3, center frequency and pulse
duration, the analysis includes considerations of the effects on accuracy of:
Hydrophone calibration drift or errors.
Hydrophone / Amp frequency response.
Spatial averaging.
Alignment errors.
Voltage measurement accuracy, including.
X
Oscilloscope vertical accuracy.
X
Oscilloscope offset accuracy.
X
Oscilloscope clock accuracy.
X
Oscilloscope Digitization rates.
X
Noise.
The systematic uncertainties Acoustic power measurements using a Radiation Force are measured
through the use of calibrated NIST acoustic power sources.
We also refer to a September 1993 analysis done by a working group of the IEC technical committee
87 and prepared by K. Beissner, as a first supplement to IEC publication 1161.
Vista de pagina 52
1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 373 374

Comentarios a estos manuales

Sin comentarios