Huntleigh Sonicaid FM800 Series, Инструкция по эксплуатации, Страница: 125 / 130

Sonicaid FM800 Encore Series Instructions for Use
125
281B
Acoustic Output
The ultrasound transducer used with the Sonicaid FM800 Encore series fetal monitors
has a single mode of operation, with fixed acoustic output parameters that are not user
adjustable.
Acoustic Output Reporting Table for Track 1 – Non-Auto-scanning Mode
Sonicaid FM800 Encore Series
Operating Mode: PWD
Application(s): Fetal Monitoring
Acoustic Output MI
I
SPTA.3
(mW/cm
2
)
I
SPPA.3
(mW/cm
2
)
Global Maximum Value* 0.013 1.2 (Note 1) 5.8 (Note 1)
Associated
Acoustic
Parameters
Pr.
3
(MPa) 0.013
W
o
total (mW) 2.5mW 2.5mW
f
c
(MHz) 1.0 1.0 1.0
Z
sp
(cm) 2.4 2.4 2.4
Beam
Dimensions
x-
6
(cm) 0.066 0.066
y-6 (cm) 0.067 0.067
PD (µS) 70 70
PRF (Hz) 3000 3000
Overall EBD (cm
2
)
(all eight crystals)
7.95
Definition of Terms
I
SPTA.3
The de-rated spatial peak temporal average intensity
I
SPPA.3
The de-rated spatial peak pulse average intensity
I
SATA
The spatial average temporal average intensity
MI The mechanical index
Pr.3 The de-rated peak negative pressure
Wo The ultrasonic power
fc The acoustic centre frequency
Z
sp
The axial distance at which the reported parameter is measured
X
-6
Y
-6
respectively the in-plane (azimuth) and out-of-plane (elevation) -6dB
dimensions in the x-y plane where Z
sp
is found
PD Pulse duration
PRF Pulse repetition frequency
EBD Entrance beam dimensions for the azimuth and elevation planes