Uncertainty Of Measurement; Reference Literature For Sound Power And Its Safety; Transducer Surface Temperature - Youkey Q7 Instructions For Use Manual

9.8 Uncertainty of measurement

I spta
I sppa
center frequency (f c )
Total power (W)
Peak negative pressure(pr)
9.9 Reference literature for sound
power and its safety
"Bio-effects and Safety of Diagnostic Ultrasound" issued by AIUM in 1993
(1)
"Medical Ultrasound Safety" issued by AIUM in 1994
(2)
"Acoustic Output Measurement Standard for Diagnostic Ultrasound Equipment,
(3)
Revision 3" issued by AIUM/NEMA in 2004
"Standard for real-time display of thermal and mechanical acoustic output indices on
(4)
diagnostic ultrasound equipment, Revision 2" issued by AIUM/NEMA in 2004
"Information for Manufacturers Seeking Marketing Clearance of Diagnostic Ultrasound
(5)
Systems and Transducers" issued by FDA in 2008.
"Medical electrical equipment - Part 2-37: Particular requirements for the basic safety
(6)
and essential performance of ultrasonic medical diagnostic and monitoring equipment"
issued by IEC in 2007.

9.10 Transducer surface temperature

EN60601-2-37:2008 according to the requirements of clause 201.11, the transducer surface
temperature was measured under two conditions: transducer suspension in the absence of air
circulation environment (Still Air) and probe contact phantom (Method B).
The maximum surface temperature and maximum temperature rise of the transducer are listed
below：
test method
Transducer
C5-2Fs TMM
31.2%
30.4%
2%
30.1%（5.6% Scan mode and combination mode）
15.5%
Operation Ambient
mode ( )
°C
Normal(B 25.554
Final Radiating
Initial
Surface temp.(TF)
temper
and/or
ature
Temp.Rise(TR)
( )
°C
(
25.261 TF=30.020 TR=4.759
)
°C
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