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--- en:monitoring_and_warning:lcostext [2023/01/24 12:24] – [Introduction] m-gamperl
+++ en:monitoring_and_warning:lcostext [2023/01/24 14:17] (current) – m-gamperl
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 This page deals with the construction and installation of the Inform@Risk Extensometer. It is a low-cost variation of commertial wire extensometers for geotechnical measurements. To achieve this, it is based on 3D printed parts and a sensor by Waycon Positionsmesstechnik GmbH (though any other wire sensor also works).
-The concept can be applied to both vertical extensometers in boreholes as well as horizontal ones in trenches. No matter which of those is installed, a concrete shaft with minimum dimensions of 60x60x100 (LxWxD) is needed. This guide will not go into detail about the installation of extensometer cables, but only deal with the installation of the necessary infrastructure at both cable ends. In this manual, all material relations are marked **bold**. The following figure gives an overview of the measurement concept for a horizontal extensometer measurement.
+The concept can be applied to both vertical extensometers in boreholes as well as horizontal ones in trenches. No matter which of those is installed, a concrete shaft with minimum dimensions of 60x60x100 (LxWxD) is needed. This guide will not go into detail about the installation of extensometer cables, but only deal with the installation of the necessary infrastructure at both cable ends. In this manual, all material relations are marked **bold**. The following figures give an overview of the measurement concept for a horizontal extensometer measurement.
 {{shaft.jpg|Top view of extensometer shaft for a horizontal installation.}}
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 ==== Tools and Parts ====
+The necessary tools are only a standard array of screwdrivers, pliars, hexagon wrenches and so on. A professional drill with big (8-12 mm) concrete drill bits is necessary for attaching the parts to the shaft. Additionally, a big hammer can help in putting the threaded rods into the shaft walls.
 ==== Preparation of Weights ====
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 ==== 3D Printed Parts ====
+The necessary/useful 3D printing designs that we used in the test installation are to be found in the [[en:resources:3dprints|3D prints section]].
 ===== Installation =====
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     - Lift weight (approx. 10 centimeters) and secure with rope stopper
-{{ext_assembly.jpg|Assembly of extensometer in a shaft. a) Lid with holes for the sensor and the extensometer wire. b) Inside of pipe with pulley, weight and cutout on the right. c) Finished pipe on the shaft wall with indication of the optimal height of the extensometer under the shaft lid. d) Prepared pipe with holes for pulley and extensometer wire. e) Preparation of EXT Pipe-Mount to the shaft wall f) Underside of the lid with the sensor attached and the sensor wire going through the cutout. g) Mounted pipe on the shaft wall.}}
+{{ext_assembly.jpg|Assembly of extensometer in a shaft.}}
+Explanation of figure: a) Lid with holes for the sensor and the extensometer wire. b) Inside of pipe with pulley, weight and cutout on the right. c) Finished pipe on the shaft wall with indication of the optimal height of the extensometer under the shaft lid. d) Prepared pipe with holes for pulley and extensometer wire. e) Preparation of EXT Pipe-Mount to the shaft wall f) Underside of the lid with the sensor attached and the sensor wire going through the cutout. g) Mounted pipe on the shaft wall.
 ===== Attaching Measurement Node to Sensor =====
+For attaching the Waycon sensor to the measurement node, the wires from the sensor have to be attached to GND, power (12 V) and the analog port of the measurement node. The chosen analog port has then to be selected when programming the node for extensometer operation (see [[software|Software Installation for Measurement Nodes]]).