CLARIUS HD3 - Page 70

Clarius Scanner HD3 Safety Topics
revision 9 63
type and level of electromagnetic phenomena. Electromagnetic phenomena may be
intermittent, making it difficult to identify the source.
If you experience EMI, use caution if you continue using the system, or consider relocating
your system.
The following table describes typical interferences seen in imaging systems. It is impossible to
describe all manifestations of interference because it depends on many parameters of the
transmitting equipment, for example, the type of modulation used by the signal carrier, the
source type, and the transmitted level. It is also possible for the interference to degrade the
imaging system's performance and become invisible on the image. If the diagnostic results are
suspicious, confirm the diagnosis using other methods.
Separation Distance
Recommended Separation Distance
The following table shows recommended separation distances for the system to be kept away
from any RF-transmitting equipment. To reduce the risk of interference, when using portable
and mobile RF communications equipment, follow the recommended separation distance
(calculated from the equation applicable to the frequency of the transmitter). Ensure that field
strengths from fixed RF transmitters, as determined by an electromagnetic site survey, are less
than the compliance level in each frequency range as noted in the table.
Field strength is difficult to predict theoretically with accuracy if they come from fixed
transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile
radios, amateur radio, AM and FM radio broadcast, and TV broadcast. To assess the
electromagnetic environment from fixed RF transmitters, consider conducting an
electromagnetic site survey. If the measured field strength in the location in which the system
Imaging Mode
ESD
1
1. Electrostatic discharge caused by discharging of electric charge buildup on insulated
surfaces or persons.
RF
2
2. Radio frequency energy from RF transmitting equipment such as portable phones,
hand-held radios, wireless devices, commercial radio and TV stations, and so on.
Power Line
3
3. Conducted interference on power lines or connected cables caused by other equipment,
such as switching power supplies, electrical controls, and natural phenomena such as
lightning.
B-Mode Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded image.
For sector imaging scanners,
white radial bands or flashes in
the center lines of the image.
For linear imaging scanners,
white vertical bands, sometimes
more pronounced on the sides
of the image.
White dots, dashes, or
diagonal lines near the
center of the image.