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IRECTION GB091046, REVISION 2 VIVID E9 / VIVID E7 BT’13 SERVICE MANUAL
Chapter 2 - Site preparations 2 - 7
2-2-3 EMI limitations
Ultrasound machines are susceptible to Electromagnetic Interference (EMI) from radio frequencies,
magnetic fields, and transients in the air or wiring. They also generate EMI. The VIVID E9 / VIVID E7
complies with limits as stated on the EMC label. However there is no guarantee that interference will not
occur in a particular installation.
Possible EMI sources should be identified before the unit is installed.
Electrical and electronic equipment may produce EMI unintentionally as the result of a defect. These
sources include:
• medical lasers,
• scanners,
• cauterizing guns,
• computers,
•monitors,
• fans,
• gel warmers,
• microwave ovens,
• light dimmers
• mobile phones
• in-house wireless phones (DECT phones)
• wireless computer keyboard and mouse
• air conditioning system
• High Frequency (HF) surgery equipment
• general AC/DC adapters
The presence of a broadcast station or broadcast van may also cause interference.
See Table 2-3 on page 2-8 for EMI Prevention tips.
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