Site Preparations
2-6
Invenia ABUS 2.0 – System Setup and Basic Service Manual
4700-0043-00 Rev. 4
EMI prevention/abatement
Table 2-3: EMI prevention/abatement
EMI RULE
DETAILS
Be aware of Radio
Frequency sources
• Keep the Invenia ABUS 2.0 at least 5 meters (15 feet) away from other EMI
sources.
• Special shielding may be required to eliminate interference problems caused by
high frequency, high powered radio or video broadcast signals.
Ground the
Ultrasound
instrument
Poor grounding is the most likely reason an Ultrasound system will have noisy
images. Check grounding of the power cord and power outlet.
Replace all screws,
Radio Frequency
gaskets, covers,
cores
• After you finish repairing or updating the Ultrasound system, replace all covers
and tighten all screws.
• Any cable with an external connection requires a magnet wrap at each end.
• Install all covers. Loose or missing covers or Radio Frequency gaskets allow
radio frequencies to interfere with the ultrasound signals.
Replace broken
Radio Frequency
gaskets
If more than 20% or a pair of the fingers on an Radio Frequency gasket are
broken, replace the gasket. Do not turn on the Ultrasound system until any loose
metallic part is removed.
Do not place labels
where Radio
Frequency gaskets
touch metal
Where applicable, never place a label where Radio Frequency gaskets meet the
Ultrasound system. Otherwise, the gap created will permit Radio Frequency
leakage. Or, if a label has been found in such a position, move the label.
Take care with
cellular phones
Cellular phones may transmit a 5 V/m signal; that could cause image artifacts.
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