The instrument consists of up to six axially configured base length strain gauges. The strain gauges are encapsulated within an epoxy resin and are designed to withstand the rigors of bolt installation using a standard procedure.
Each instrument is subjected to a multipoint calibration. The coefficients are written into a microcontroller memory, and a precise linear function is used to enhance linearity, the output signal and applied strain. Each bolt is individually calibrated.
Data Sheet: Instrumented Rock Bolt