Ultrasonix SONIX Series, Service Manual

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3.1.2.1 Instrument Input Power Rating
An instrument input power rating has been established to clarify the maximum power
requirement of the system with all accessories. Depending upon the accessories and
options installed, the system may not draw the full amount of power listed below:
Table 3-3: Instrument Input Power Rating
System
Voltage, VAC
Nominal System Power
Usage, including isolated
accessory power
SONIX System
Power Usage
Isolated Accessory
Power Available
115V 7A Continuous 5.5A Continuous 1.5A Continuous
220V 4A Continuous 3.25A Continuous 0.75A Continuous
For optimal system performance, use a dedicated, interference-free, isolated, grounded
wall outlet. To ensure grounding reliability, use a hospital-grade power cord and connect it
only to an equivalent hospital-grade socket. The specifications of the hospital-grade power
cord as follows:
Table 3-4: Hospital-Grade Power Cord Specifications
Input Voltage Hospital Grade Power Cord Specifications
100-120V ~, 47-63Hz
125Vac, 15A, 3 wire, 18 AWG, grounding type, 5-15P Hospital
Grade plug cap, less than 6 m long, CSA & UL approved
200-240V~, 47-63Hz
250Vac, 15A, 3 wire, 18 AWG, grounding type, 6-15P Hospital
Grade plug cap, less than 6 m long, CSA & UL approved
3.1.3 Electrostatic Discharge
During normal operation, the presence of electrostatic discharge (ESD) can cause system
reliability issues. The following are the most common causes for ESD:
•
Moving people
•
Low humidity
•
Improper grounding
•
Unshielded cable
•
Poor connection
•
Moving machines
ESD is most likely to occur during periods of low humidity. If the relative humidity is below
50%, static charges can easily accumulate. ESD generally does not occur when the
humidity is above 50%. Any time the charge reaches approximately 10,000 volts, it is likely
to discharge to grounded metal parts.
Although ESD will not hurt humans, it will destroy certain electronic devices. The high-
voltage pulse can burn out the inputs of many integrated circuit (IC) devices. This damage
might not appear instantly, but it can build up over time, eventually causing the device to
fail.
Chapter 3: System Installation SSM – 001, Revision F SONIX Service Manual
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