ELLIPSE2 AHRS & INS
– Hardware Manual
ELLIPSE2HM.1.3
2.1.3. Device mechanical alignment
For best measurement accuracy, a good mechanical alignment is required. During manufacturing, the Ellipse
measurement frame has been carefully aligned to 0.05° with the base plate for roll, pitch and yaw angles.
To ease the yaw alignment (X axis), the base Ellipse A, E and N plate features two alignment holes Ø 2mm
H8 that guarantees with two taper pins Ø 2mm h7 a yaw alignment better than ±0.05°. The Ellipse-D
provides similar alignment holes but with 3mm diameter.
2.1.4. Origin of measurements
The center of measurement for acceleration, velocity and position is represented on the mechanical outlines
by the symbol. It is referenced to the base plate fine alignment hole.
2.1.5. Device labels
SBG Systems manufacturing process is based on EN-9100 system with individual and full traceability of
every component and operation. Each Ellipse is identified by a unique serial number that can be used to
trace all operations during the product lifetime such as manufacturing, calibration, tests and repairs.
In addition to a unique serial number, a product code + hardware revision number are used to define exactly
the device hardware and options.
You can find on the back side of the Ellipse a laser printed label that hold all these identification
information. This label also includes a data-matrix code that encodes the device unique serial number.
In addition, the Ellipse packaging includes a second label that provides other useful information such as
installed firmware version or GNSS options in the case of an ELLIPSE-D.
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Figure 2.1: Ellipse device label sample
Figure 2.2: Ellipse packaging label sample
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