Northern Digital Polaris Vicra User Manual page 29

large reflective surface. It can be draped with non-reflective material to eliminate
reflections.
• Make sure that the tools do not have flat reflective surfaces. Certain tool shapes and surfaces
can cause reflections that may interfere with the Polaris Vicra System. For more
information, see the "Polaris Tool Design Guide".
• The system requires a warm-up time from storage temperature to operating temperature
equivalent to 10 minutes plus one minute for every 1°C of difference between storage
temperature and operating temperature. (If the temperature difference is within 5°C, the
warm-up time will be 10 minutes.)
For example, if the system is stored at -10°C and moved to a location at +30°C, the warm-
up time will be 10 minutes, plus an additional 40 minutes to account for the difference in
temperature.
• The operating environment is as close as possible to 20ºC. The Polaris Vicra System is
characterized at 20ºC and is therefore most accurate at this temperature.
• If the system is to be used in an MRI environment, contact NDI for information on response
of the system.
Polaris Vicra User Guide - Revision 2
Setting Up the Polaris Vicra System
17