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AC-23 Accelerometer User Manual
11.08.2022 / V17
8.4 Inclinometer casing assembly
The borehole must have a casing or the soil must insure that a free path for the inclinometer tube is warranted.
It is recommended to insert the inclinometer tube as soon the borehole is ready.
The free path for the inclinometer tube should be 10 to 15 cm, 12 cm typically.
It could be required to insert some water in the casing to sustain the water pressure at the bottom of the
borehole.
The inclinometer tube should be mounted with a maximum deviation of ±1° / 3 meters and with a maximum
deviation from vertical at sensor location of ±3°. The functional limit for the sensor is ±9°.
The water level in the inclinometer tube should be maximum 50 meters, including fast elevation due to heavy
rain.
It is recommended to use the optional assembly kit that GeoSIG can provide (optional) with the inclinometer
tube. It will insure a perfect sealing of the tube elements and would avoid concrete mix to enter the tube.
The dimensions of the inclinometer tube are:
INCLINOMETRIC CASING (3 m section)
A
Inner diameter 76.1 mm
B
Groove outer diameter 86.4 mm
C
Thickness
D
Groove inner diameter 82.0 mm
Length 3 meters
Weight 1.4 Kg/m
Borehole diameter
Figure 11 – Inclinometer tube dimensions
2.2 ±0.1 mm
> 120 mm
Table 3 – Inclinometer tube dimensions
COUPLING ELEMENT
A
Inner diameter 81.0 mm
B
Outer diameter 92.0 mm
C
Thickness
D
Groove inner diameter 87.6 mm
Length 300 mm
Weight 0.5 kg
13 / 15
2.2 mm
GS_AC-23_UserManual_V17
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