Sensor I® Expert User Manual
Dynamic Audit:
The Dynamic Audit feature of the Expert wrench audits residual torque currently on the fastener after relaxation and other effects have taken place. On a very hard joint that is audited soon after tightening, this will consistently equate to installation torque. On a very soft joint or a joint audited long after the initial tightening, it may be considerably reduced.
Standard methods are open to variance from operator influence. Experienced auditors try to overcome these difficulties by watching the socket very closely and moving very cautiously. Other operators may have a tendency to pull the wrench until the expected value is reached. Although that specific bolt may end up with the correct torque, it does not tell Quality Control about any possible problems that are occurring with the fastening equipment on line.
The Expert wrench helps eliminate this operator influence by capturing the residual torque after a very small angle is turned regardless of how far or fast the wrench is pulled. In other words, all that is required is a quick pull and the processor takes a "snapshot" of the dynamic torque at the
To Dynamically Audit Residual Torque:
A table of audit angle values is provided for your convenience. The guiding principle is to set a sufficient angle of turn to ensure the bolt threads are moving when the torque snapshot occurs. The longer the fastener, the greater the required angle.
To ensure that an accurate reading is received, the following procedure should be followed:
