V1.1
MEMS Digital Portable Horizontal Inclinometer
09/02/2022
13
6.3. Zone of Influence
The
Geosense®
Horizontal Inclinometer measures absolute angle, however the
system as a whole is relative when referring to a measurement of displacement over
a profile. This means that movement (displacement as a result of heave or
settlement) in the vertical plane must be measured in relation to a fixed end of the
system.
One end of a Horizontal Inclinometer installation MUST
always be outside of the Zone of Influence for the
expected heave or settlement event
Without a fixed end, it would not be known in which way either end of the profile had
moved, as a heave at one end could also be construed as a settlement at the
opposite end.
The end that is presumed with a high confidence to be outside of any zone of
influence of settlement or heave is used as the “fixed” point. This can be either end
of the installation, though it is recommended that this is the “Access End” as further
precise level surveys can be conducted to confirm the stability of the reference end.
