Samsung SONOACE R5 Manual do Utilizador Página 47

  • Descarregar
  • Adicionar aos meus manuais
  • Imprimir
  • Página
    / 172
  • Índice
  • MARCADORES
  • Avaliado. / 5. Com base em avaliações de clientes
Vista de página 46
1-31
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 eects 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 oset 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 rst supplement to IEC publication 1161.
Vista de página 46
1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 171 172

Comentários a estes Manuais

Sem comentários