GE M
EDICAL
S
YSTEMS
D
IRECTION
FC091194, R
EVISION
02
V
IVID
7 / V
IVID
7 PRO S
ERVICE
M
ANUAL
2 - 4
Section 2-2 - General Console Requirements
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
for EMI Prevention tips.
Содержание FC091194
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