Connecting your structure/material to be tested securely to the device is critical to the safe and proper use of Go Direct Structures & Materials Tester (GDX‑VSMT). The VSMT Tackle Kit comes with a variety of components that are used to secure the structure/material to the Tester cross bars and connect to the GDX-VSMT force sensor. All structures and materials are generally supported by the crossbars that can be adjusted from 0 cm to over 40 cm. The bars can be secured in place by tightening the hex head screws.
The primary methods of attaching the tackle to the structure/material are to use a U-bolt in combination with quick links (and chain, as needed), or by using a threaded rod and load plate.
Once the structure or beam is secured in place with the appropriate tackle, launch Graphical Analysis 4 and connect the Go Direct Structures & Materials Tester as described in the Getting Started section. Turn the displacement wheel counter clockwise and the force sensor travels down, applying a force to the structure or beam via the tackle. The GDX-VSMT force sensor registers the force while the GDX-VSMT displacement sensor tracks how far the structure has been deflected, bent, or stretched.
Zeroing the Sensors
Zero both of the sensors before any data collection. The VSMT displacement and force sensors should be zeroed with the tackle just in contact with the structure or beam immediately before applying a force.
If a structure is attached to the GDX-VSMT force sensor by means of a rigid connection (e.g., a threaded rod), the tackle is supported by the force sensor. Zero the force sensor with the tackle attached so that the sensor will register only the force actually applied to the structure.
If a structure is attached to the GDX-VSMT force sensor by means of a non-rigid connection (e.g., U-bolt, quick link and chain) then the weight of the tackle is an additional force that is applied to the structure. If necessary for your investigation you can account for the weight of the tackle by adding a new calculated column.
Force Sensor Overload Warning
If the force applied to the force sensor exceeds its rated load of 1,000 N (225 lbs) a red light will appear on the face of the sensor electronics box. This is the indication that no additional force should be applied in order to avoid damaging the sensor.