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3. INSTALLATION
Two styles of installation are available: - pedestal mounted and pipe mounted.
3.1 Pipe Mounted
The Transducer enclosure can be mounted on a three-inch steel pipe threaded at its upper end to
mate with the flange on the underside of the sensor enclosure. In the case of an unstable slope the
enclosure will probably be at the up-hill point and the three-inch pipe will be grouted or firmly
wedged into a borehole drilled perpendicular to the slope. The second moving point should
consist of a similar three-inch pipe grouted or wedged in place at the desired distance from the
first mounting point. Figure 3 shows a typical set-up
Figure 3 - Pipe Mounted Long Range Displacement Meter
3.2 Pedestal Mounted
At locations where drilling a hole is not possible the readout enclosure can be mounted on a
pedestal. Here the Transducer Enclosure is bolted to a steel Mounting Plate which is then bolted
to a flat surface measuring approximately nine-inch square. Ideally, the plane of this surface
should be inclined to be parallel to the plane of the extension wire; (in the case of measurements
down a slope this would mean parallel to the slope). Once this surface has been created, in wood
or concrete then four bolt holes need to be drilled in it with the same bolt pattern as the four 3/8-
inch holes drilled in the Mounting Plate, these holes are then used to install 1/4-inch Rawl drop
in anchors for concrete, (available through Geokon), or 1/4-inch lag screws in wood. A typical
set up is shown in Figure 4 on the following page. Instructions for the Rawl drop-in anchors are
as follows:
Using a masonry drill or other suitable equipment, drill two 3/8 inch, (10 mm), diameter holes
1.25", (32 mm), deep at the proper locations.