The quality of a measurement made with a strain gauge essentially depends on the type of installation and design of the measuring point. A thorough preparation of the installation surface, correct connection, and protective covering are important factors for problem-free results.
Immediately after completing the installation of a strain gauge, the measuring point on the surface of the component must be carefully protected from environmental influences by a covering material. In the selection of the covering material, the following factors are to be considered:
- Environmental conditions during the measurement
- Duration of the measurement
- Required service life
- Measuring accuracy
- The measuring object must not be stiffened in an impermissible manner; and
- The material that comes in contact with the measuring point, including the connection cable, must also have a very high insulation resistance and not be capable of triggering any chemical reactions or corrosion.