Q9 Digital Color Doppler Ultrasound System
190
APPENDIX D Transducer Maximum Surface Temperature
According to the requirements of the section 42.3 in the standard IEC 60601-2-37:2007,the transducer surface
temperature has been tested in two kinds of conditions: the transducer suspended in still air or transducer contacting
human-tissue mimicking material. The calculation of the expanded uncertainty is based on the ISO Guide tout ye
Expression of uncertainty in measurement. Three transducer samples have been tested and the confidence coefficient is
at 95%,the value of t.975 is 4.30.
The measurement data were obtained under the test conditions employed at CHISON.
Transducer
model
Ambient
(℃
℃℃
℃)
Maximum surface
temperature(℃
℃℃
℃)
Contacting human-tissue
mimicking material
Maximum surface
temperature(℃
℃℃
℃)
Suspending in air
D3C60L
25 33±
±±
±1 47±
±±
±1
D7L40L
25 32±
±±
±1 39±
±±
±2
D6C12L
25 29±
±±
±1 45±
±±
±2
D6C15L
25 33±
±±
±1 43±
±±
±2
D3C20L
25 33±
±±
±1 46±
±±
±2
V4C40L
25 31±
±±
±1 39±
±±
±2
Note: Values following the “ ±
±±
± ”mark indicate the expanded uncertainty with a confidence lever of
95%,t.975=4.30.
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