Emi Limitations - GE Vivid 7 Service Manual

GE M S
EDICAL YSTEMS
D FC091194, R
IRECTION
2-2-2-6 Power Stability Requirements
Voltage drop-out
Max 10 ms.
Power Transients
(All applications)
Less than 25% of nominal peak voltage for less than 1 millisecond for any type of transient, including
line frequency, synchronous, asynchronous, or aperiodic transients.
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 7 / Vivid 7 PRO
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
• portable phones.
The presence of a broadcast station or broadcast van may also cause interference.
See Table 2-5 on page 2-5
2 - 4
02
EVISION
for EMI Prevention tips.
Section 2-2 - General Console Requirements
V 7 / V 7 PRO S
IVID IVID ERVICE
M
ANUAL