47
Revision 3
Janvier 2015
Owners manual
ENGLISH
Center of mass adjustment
The adjustment of the center of mass is really
important. It will affect the stability of the chair as
well as the force needed to tilt the chair. The following
table is for reference only. It was established according
to the mass distribution of the dummy define in the
ISO 7176-11:2012 standard. This distribution is a
representation of an average person for a specific
weight. However, the specific anthropometry may
be very different and the proposed table may not be
adapted.
Center of mass location
The center of mass location should be adjusted
according to Figure 2. Distance A should be around
50 mm (2 inches)
To achieve this, you can use Table 2 as guidelines. This was established considering the mass
distribution of the ISO 7176-11:2012 standard and a 90 to 95 degree backrest angle.
Figure 2: Center of mass adjustment
Table 2: Center of mass adjustment according to seat depth and patient weight
Gas cylinder adjustment
With the proper center of mass adjustment, the gas cylinder
can be adjusted in the central position for every user (see
Figure 3). Here is some situation where a technician may
decide to install the cylinder at a different position:
• For a light user (less than 75 kg), you may use the -1
position to ease the tilt maneuver.
• If the backrest has a large angle with the seat and it is not
possible to adjust the center of mass as specified, you
may use the 1 position to lower the force to return tilted
seat to upright position. This position however limits the
tilting from 3 to 44 degrees.
Figure 3: Gas cylinder adjustment
