Northern Digital Polaris Vicra User Manual page 22

Polaris Vicra System Overview
• The API command BEEP can be used to set up to nine tones as required. Refer to the
"Polaris Application Program Interface Guide" for further details on setting the BEEP
command.
Bump Sensor
The Position Sensor houses a bump sensor that detects when the Position Sensor has been bumped
above a shock limit broadly equivalent to a 200 mm to 254 mm drop onto a vinyl tiled concrete
surface. If a bump is detected above this threshold, the error LED on the Position Sensor will flash,
indicating that a non-critical error has been detected.
You can check the bump sensor status using NDI ToolBox application software. For further
information on NDI ToolBox, refer to the online help.
Because a bump can affect the calibration of the Position Sensor, the system will not report
transformations if the bump sensor has detected a bump, unless:
• the bump sensor has been cleared, or
• reply option 0x0800 is used with the TX or BX command.
Note
See the "Polaris Application Program Interface Guide" for details on checking and clearing the bump sensor, and
using the TX, BX and GET commands.
If a bump has been detected, NDI recommends that you perform an accuracy assessment procedure
with the NDI Accuracy Assessment Kit (AAK), to ensure that the Position Sensor is still calibrated.
For information on the accuracy assessment procedure and AAK, contact NDI or visit the support
site at http://support.ndigital.com.
The bump sensor circuit derives its power from an internal battery that has an operational life of
approximately 10 years. As the battery begins to lose power, the battery alert flag (in the
Info.Status.Alerts parameter) will be set intermittently. This will cause the error indicator LED on
the Position Sensor to flash. The intermittent indication is caused by the battery voltage fluctuating
about the fault threshold level. (The Position Sensor must be returned to NDI to have the battery
replaced.)
Note
The bump sensor battery is a Lithium battery. If you dispose of the Position Sensor locally, make sure that you
adhere to all applicable legislation and regulations relating to the disposal of Lithium batteries.
Ingress Protection
The Position Sensor is designed to an ingress protection level of IP 54. The "5" denotes that the
Position Sensor is protected against dust. The "4" denotes that the Position Sensor is protected
against liquid sprayed in all directions. To maintain an ingress protection level of IP 54, the Position
Sensor cable (attached to the Host USB Converter) must be plugged in. For details on connecting
the system, see
10
"Connecting the Hardware" on page 19.
Polaris Vicra User Guide - Revision 2