| 摘要 |
Apparatus for precision tensioning of threaded fasteners and the like comprising a drive head having a shaft for applying turning torque to a threaded fastener, a strain gage mounted on the drive shaft for providing a torque signal as a function of torque applied to the fastener, and an optical encoder for providing an angle signal as a function of angle of rotation of the fastener. An electronics package includes a microprocessor-based controller, an alphanumeric display for displaying either torque or angle as well as additional operating mode information, and a membrane switch panel for operator selection of angle-monitoring mode, torque-monitoring mode, measurement or setup operating modes, torque display in Newton-meters or foot-pounds, and for programming desired torque and/or angle thresholds into the control microprocessor.
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