Emi Limitations - GE LOGIQ 5 PRO Service Manual

GE M S
EDICAL YSTEMS
D 2380207, R
IRECTION EVISION
2-2-2-5 Unit Power Plug
If the unit arrives without the power plug, or with the wrong plug, you must contact your GE dealer or
the installation engineer must supply what is locally required.
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 transient in the air wiring. They also generate EMI. The LOGIQ™ 5 complies with
limits as stated on the EMC label. However there is no guarantee that interface 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 defect.
These sources include:
• medical lasers,
• scanners,
• cauterizing guns,
• computers,
• monitors,
• fans,
• gel warmers,
• microwave ovens,
• light dimmers,
• portable phones.
The presence of broadcast station or broadcast van may also cause interference. See for EMI
Prevention tips.
See Table 2-5 for EMI Prevention tips.
Table 2-5
Be aware of RF sources
Ground the unit
2-4
7
EMI Prevention/abatement
EMI Rule
Keep the unit at least 5 meters or 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.
Poor grounding is the most likely reason a unit will have noisy images. Check grounding of
the power cord and power outlet.
Section 2-2 - General Console Requirements
LOGIQ™5 PRO S
Details
M
ERVICE ANUAL