Interacoustics Callisto Gebrauchsanweisung Seite 12

Callisto™ Instructions for Use - EN Page 6
To establish conformity with the IEC 60645-2 standard, it is important that the
speech input level is adjusted to 0VU. It is equally important that any free field
installation is calibrated at the site where it is used and under the conditions that
exists during normal operation.
Great care should be exercised by the handling of earphones and other
transducers, as mechanical shock may cause change of calibration.
The specification for the instrument is valid if the instrument is operated within
the environmental limits specified in technical specifications.
Supply voltage: USB-powered (USB Type B connector).
To prevent system faults take appropriate precautions to avoid PC viruses and
similar.