Theory Of Operation - Geosense MEMS DPI I Instruction Manual

MEMS Digital Portable Horizontal Inclinometer
V1.1
09/02/2022
compared with each other to detect changes.
2.2.

Theory of Operation

Special tubes, commonly referred to as Casing or Access Tubes, are installed into or
fixed onto the structure or formation to be monitored. (see Geosense® Inclinometer
Casing Installation Manual).
Inclinometer casing is a specially machined ABS tube that has 4 equally spaced,
parallel 'keyways' in its inner surface and a reference 'rib' on its outer surface. The
inclinometer casing is designed to move with the structure/formation into which, or
onto which it is fixed, if the structure changes.
Casing for the Horizontal Inclinometer MUST
be installed so that one pair of keyways is VERTICAL
The Portable Inclinometer System is used to detect and quantify any changes in the
'shape' of the installed casing. For horizontal casing, changes in the vertical
direction can be detected. The inclinometer probe, connected to its cable, is inserted
into the inclinometer casing with its wheels located in the A+ / A- keyways (Figure 1:
Schematic of inclinometer casing keyways).
A+
B- B+
A-
Figure 1: Schematic of inclinometer casing keyways
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