Transducer Maximum Surface Temperature A-1
Appendix A 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 to the 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.
Transducer model Maximum surface temperature
(°C)
*1
Contacting TMM
Maximum surface temperature
(°C)
*1
Suspending in air
75L53EA
39.17±0.59 32.64±0.57
75L38EA
40.43±0.47 34.34±0.47
65EB10EA
41.83±0.81 32.57±0.47
65C15EA
40.50±0.37 38.80±0.57
35C50EA
40.33±0.59 36.27±0.68
10L24EA
37.50±0.57 33.27±0.47
50L60EAV
39.17±0.59 32.64±0.57
75L50EAV
40.43±0.47 34.34±0.47
*1: Values following the "r" mark indicate the expanded uncertainty with a confidence level of
95%, t
.975
= 4.30.
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