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2. INSTALLATION
2.1 Preliminary Tests
Before installing the Instrumented Rockbolt, it should be checked by connecting it to the readout
box and taking a no-load reading. This reading, when compared with that given in the calibration
data provided with the load cell, will show if the sensor is functioning properly. The two
readings should agree within about
±
50 digits. See Section 3 for readout instructions.
Before installing the Instrumented Rockbolt be sure to take the no-load reading. This reading is
very important since it is the reading that will be subtracted from all subsequent readings to
calculate the load. Note that each Instrumented Rockbolt has a different no-load reading, which
is not zero. See Section 3 for operation of the Readout Boxes.
2.2 Instrumented Rockbolt Installation
Connect the instrumented section to the rest of the rockbolt using the coupler provided make sure
that the electrode end points out of the end of the bolt. Tighten the connector then install the bolt
in the normal manner being sure to position the nut and bearing plate so that the strain gauge
inside the Instrumented Rockbolt is positioned inside the borehole so that it will experience the
full load in the bolt. Do not run the nut up so far that it lies over the strain gauge.
