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11.6 Electromagnetic Emissions and Electromagnetic Immunity
Chapter 11
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Essential performance of this system
• Free from noise on a waveform or artefacts or distortion in an image or error of a displayed numerical value which cannot be at-
tributed to a physiological eect and which may alter the diagnosis.
• Free from the display of incorrect numerical values associated with the diagnosis to be performed.
• Free from the display of incorrect safety-related indications.
• Free from the production of unintended or excessive ultrasound output.
• Free from the production of unintended or excessive TRANSDUCER ASSEMBLY surface temperature.
Notice1: "artifact" means "noise" that generates acoustically.
Notice2: "incorrect" in the sense that the displayed value diers from what is calculated (having been altered during
data transfer), or the calculation itself is not correct.
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List of transducers for conformance standard of EMC
Transducer name Shielded/Unshielded Length
C5-2 Shielded < 3 m
L18-4 Shielded < 3 m
S4-2 Shielded < 3 m
L14-4 Shielded < 3 m
EC9-3 Shielded < 3 m
L11-3 Shielded < 3 m
HL18-4 Shielded < 3 m
MC10-3 Shielded < 3 m
WL13-3 Shielded < 3 m
S4-2A Shielded < 3 m
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List of cables for conformance standard of EMC
Cable name Shielded/Unshielded Ferrite core Length
Power supply cord
(Hospital Grade)
Unshielded Not exist ≤ 3.5 m
USB cable Shielded Exist ≤ 2.0 m
LAN cable Shielded Not exist ≤ 10 m
DVI cable Shielded Exist ≤ 2.0 m
ECG cable Shielded Exist ≤ 3.5 m
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