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
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