Mindray DP-8300, Operator'S Manual

Page: 91 / 101

Appendix A Transducer Maximum
Surface Temperature
According to the requirements of the section 42.3 in the standard EN60601-2-37: 2001+A1:
2005+A2: 2005, 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 to the Expression of uncertainty
in measurement. Three transducer samples have been tested and the confidence coefficient is at
95%, the value of
is 4.30.
975 .
t
*
The measurement data were obtained under the test conditions employed at Mindray.
No. Transducer model
Maximum surface
temperature (°C)
1
*
30 min suspending in air
Maximum surface
temperature (°C)
1
*
30 min contacting TMM
1
35C20EA 34.60 ± 0.71 40.73 ± 0.68
2
35C50EA/35C50EB 35.20
±
0.57 41.53
±
0.47
3
65C15EA 34.07
±
0.40 40.87
±
0.40
4
65EC10EA 32.27
±
0.31 42.23
±
0.47
5 65EL60EA
29.87
±
0.40 41.67
±
0.47
6 75L38EA 34.63 ± 0.47 41.03 ± 0.59
7 75L53EA 34.47 ± 0.68 40.20 ± 0.57
8
75L60EA 30.10
±
0.51 37.77
±
0.68
9
75LT38EA 31.23
±
0.68 41.27
±
0.47
*1: Values following the "
±
" mark indicate the expanded uncertainty with a confidence level of
95%, = 4.30.
975 .
t
Transducer Maximum Surface Temperature A-1