GE
D
IRECTION
5573152-100, R
EV
. 2
LOGIQ E9 S
ERVICE
M
ANUAL
Chapter 2 Site preparations
2 - 5
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. Ultrasound machines also generate EMI. The
LOGIQ E9 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 LOGIQ E9 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.
for EMI Prevention tips.
Table 2-5
EMI prevention/abatement
EMI RULE
DETAILS
Be aware of RF sources
Keep the LOGIQ E9 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.
Ground the LOGIQ E9 Poor grounding is the most likely reason a LOGIQ E9 will have noisy images. Check
grounding of the power cord and power outlet.
Replace all screws, RF
gaskets, covers, cores
After you finish repairing or updating the LOGIQ E9, replace all covers and tighten all
screws. Any cable with an external connection requires a magnet wrap at each end.
Install the Card Rack cover over the Card Rack. Loose or missing covers or RF
gaskets allow radio frequencies to interfere with the ultrasound signals.
Replace broken RF
gaskets
If more than 20% or a pair of the fingers on an RF gasket are broken, replace the
gasket. Do not turn on the LOGIQ E9 until any loose metallic part is removed.
Do not place labels
where RF gaskets touch
metal
Never place a label where RF gaskets meet the LOGIQ E9. Otherwise, the gap
created will permit RF leakage. Or, if a label has been found in such a position, move
the label.
Use GE specified
harnesses and
peripherals
The interconnect cables are grounded and require ferrite beads and other shielding.
Also, cable length, material, and routing are all important; do not change from what is
specified.
Take care with cellular
phones
Cellular phones may transmit a 5 V/m signal; that could cause image artifacts.
Properly dress
peripheral cables
Do not allow cables to lie across the top of the Card Rack or hang out of the peripheral
bays. Loop the excess length for peripheral cables inside the peripheral bays. Attach
the LCD cables to the frame.
Содержание LOGIQ E9
Страница 1: ...12 13 18 GEHC_FRNT_CVR FM LOGIQ E9 SERVICE MANUAL VERSION R6 Part Number 5573152 100 Revision Rev 2 ...
Страница 2: ......
Страница 11: ...GE DIRECTION 5573152 100 REV 2 LOGIQ E9 SERVICE MANUAL xi ZH CN KO ...
Страница 140: ...DIRECTION 5573152 100 REV 2 LOGIQ E9 SERVICE MANUAL 4 50 Section 4 8 Site Log This page was intentionally left blank ...
Страница 753: ......
Страница 754: ......