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.

  • Wrench full release: select the checkbox to enable the motorized cell to fully release the wrench back to its null position after each tightening.
    This option is available only for tools with Tool type set to Peak or Click Wrench.

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.

  • Slip torque: The device manages the default value, which is indicated as Automatic value. Enter a slip torque value that is less than or equal to the target torque.

  • End Cycle Time: Enter the value for the end cycle time. This timeout defines the end of the test. The end cycle time must be between 0.1 seconds and 5.0 seconds.

  • 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.