ISO 6789-2:2017 parameters

The ISO 6789-2:2017 inspection is available only for tools Type I - Peak wrench and Type II - Click wrench.

General category

  • Name: type the name of the inspection.

  • Barcode identifier: it identifies the inspection. If left blank, the identifier corresponds to the inspection name.

  • Measuring device type: STbench is the only measuring device type available for this test strategy.

  • Measuring device S/N: type the serial number of the measuring device connected to the device.

  • Tightening direction: from the drop down list select the tightening direction. The available items are:

    • Clockwise

    • Counterclockwise

  • Disable manual insert: if selected, the wrench torque readings are automatically populated with the Target torque value of the test. If unselected, the wrench torque readings must be typed manually.
    Available only for Type I wrenches.

  • Relaxation time: in case of wrenches that do not save the torque peak, type a value greater than the mechanical relaxation of the wrench. In case of wrenches that do save the torque peak, leave this parameter at 0.
    The maximum value is 5 s. Available only for Type I wrenches.

  • End cycle time: if Relaxation time = 0, the End cycle time starts when the torque goes and remains below the Cycle complete for the given time. If Relaxation time > 0, the End cycle time starts when the Relaxation time expires.
    The default value is 0.4 s. Available only for Type I wrenches.

  • Expected measurement error (as): type the expected measurement error.

  • Expected relative uncertainty interval (W'): type the expected relative uncertainty interval.

  • Preload: select the checkbox to enable the preload measurements.

Measurement sequence 1 category

  • Target torque: this parameter is defined in the ISO 6789-2:2017 standard. For Type I wrenches and for classes A, C, D, F and G of Type II, the target torque is equal to the tool minimum capacity; for classes B and E of Type II, the target torque is equal to the tool maximum capacity.
    The target torque field is available only for classes C and F of Type II.

  • Maximum deviation: unavailable value. The percentage of maximum deviation is equal to 4%. This value is defined in the ISO 6789-2:2017 standard.

  • Number of samples: unavailable value. The number of results to do it is equal to 5. This value is defined in the ISO 6789-2:2017 standard.

  • STbench channel: select the STbench channel to use to do the test. The available options are:

    • Manual selection.

    • Number of the STbench channel (from 1 to 8).

  • Transducer S/N: type the serial number of the transducer linked to the measuring device connected to the device.

Measurement sequence 2 category and Measurement sequence 3 category are available for Type I wrenches and for the classes A, D and G of Type II and have the same structure of the Measurement sequence 1 category, only the target torque changes.
In Measurement sequence 2, the target torque is set to the 60% of the tool maximum capacity.
In Measurement sequence 3, the target torque is set to the 100% of the tool maximum capacity.