Sturtevant Richmont Programmable Torque Verifier FM II, Руководство пользователя

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Diagram 5 shows the signal from a
wrench that was pulled past the click,
most likely overtorquing the fastener.
The time the wrench spent in the
clicked position exceeds the maximum
allowable time for that joint. This fas-
tener is rejected for overtorque.
The PTV-FM works with the FM Switch Wrench to bring systematized control to the use of manu-
al torque wrenches. The control is applied as follows:
1. The FM Switch Wrench is a preset clicker-type torque wrench. The torque is preset using a
torque tester to assure the wrench is accurately set, then the torque setting is locked in.
2. The joint is tested with the FM Switch Wrench and an indicating torque wrench to determine
the proper duration of a click on the joint.
3. The maximum and minimum duration of a click is programmed into the PTV-FM.
4. The FM Switch Wrench is used to tighten a fastener. As soon as the wrench clicks, an FM
radio signal is sent to the PTV, and a timer starts. The signal is continuous for as long as the
wrench is in the clicked position.
5. When the pressure is released on the wrench, it resets, turning off the FM signal. This stops
the timer and the PTV compares the time to the minimum (TMIN) and maximum (TMAX)
allowable times for signal duration.
6. The PTV-FM communicates immediately to the operator the acceptability of that use of the
wrench. Front panel LED’s and a buzzer inform the operator whether or not the fastener was
accepted.
7. If the fastener was properly tightened, the PTV-FM advances the count of fasteners tightened
in the batch by one. This assists the operator in keeping track of wherever they stand in a
multi-fastener assembly.