User's Manual

Appendix
7-6
Vscan Air
–
User Manual
Direction GP092020-1EN
Rev 08
Probe surface temperature safety mechanisms
The system has an Probe Surface Temperature Control
Algorithm to ensure that each probe is set up and run within
temperature limits given by the harmonized safety standard
IEC60601-2-37. The Control Algorithm is implemented in the
software and calibrated by laboratory measurements of surface
temperature on each probe type. A Control Algorithm Input
Parameter check is performed during setup of each new scan,
and any detected error in the input, and/or malfunction are
protected by software error handling that aborts setup and
prevents start of scanning. The system has monitoring of
voltage and power used by the ultrasound transmits circuitry and
probe. If transmit voltage or power exceeds expected values,
the transmit voltage will be set to zero and scanning will stop.
This mechanism will protect against illegal setup and/or probe
defects.
These safety mechanisms are designed to ensure that the lens
surface temperature of the two transducers, is kept within values
listed in the table ‘Maximum Vscan Air CL temperature’ on
page 2-23 section in this user manual. The Vscan Air probe is
equipped with internal temperature sensors and mechanisms to
monitor and limit the probe temperature so that the lens surface
temperature is kept <43°C.
No particular user actions are required for the proper functioning
of the described safety mechanisms.