Hilti Nuron SI-AT-22 Manual De Instrucciones página 37

6.8 Tightening the threaded fastener in "Tightening" operating mode
1. Select the "Tightening" operating mode.
2. Determine the tightening setting for the threaded fastener to be tightened → page 29 and select this
setting.
3. Set the forward/reverse switch to the "Forward" position.
4. Install a suitable accessory tool on the impact wrench and engage the product to be tightened.
5. Press the control switch and hold it down until the torque module returns one of the following feedback
signals:
Result 1 / 2
•
The message indicating "Tightening completed successfully" is displayed:
• The LEDs show green.
• The confirmation tone sounds.
The fastener was tightened correctly. You can continue directly to the next fastener of the same type.
Result 2 / 2
•
The message indicating "Tightening not completed correctly" is displayed:
• The LEDs flash red.
• Warning tone 2 sounds.
▶ Use a calibrated torque wrench to apply the correct tightening torque to the fastener.
6.9 Checking fastener
All Hilti fasteners are subject to a process of constant updating, which means that fasteners not described
in this documentation might also be supported by the SI-AT module. Keep the software and the parameter
versions up to date at all times.
Current operating instructions and instructions for testing can be found online at: www.hilti.group
6.9.1 Checking the fasteners of stud anchors
To ensure that the specified pretension as per the approval / operating instructions has been correctly
applied when the "Adaptive" operating mode is used to tighten stud anchors, the first stud anchor and
the last stud anchor always have to be checked with a calibrated torque wrench. This check of the
applied installation torque has to be carried out immediately after tightening (installation) of the stud
anchor.
The check torque to be applied corresponds to 75 % of the installation torque specified for the stud
anchor in question; obtain this information from the operating instructions for this anchor.
▶ Check the fastener of the stud anchor with a calibrated torque wrench and application of the correct
check torque. In this process, observe the angle through which the fastener can be turned in the
tightening direction.
Result 1 / 2
The fastener of the stud anchor was not turned farther than through the specified maximum angle of
rotation (< 180 °).
The fastener was tightened correctly.
Result 2 / 2
The fastener of the stud anchor was turned farther than the specified maximum angle of rotation (> 180 °).
The fastener was not tightened correctly. The threaded fasteners tightened since the previous check are
to be regarded as faulty and must be checked. Have the impact wrench checked by Hilti Service.
6.9.2 Check of the fasteners of threaded rods with chemical anchors
To ensure that the specified pretension as per the operating instructions has been correctly applied
when the "Adaptive" operating mode is used to tighten fasteners of threaded rods with chemical
anchors, the first fastener and the last fastener always have to be checked with a calibrated torque
wrench. This check of the applied installation torque has to be carried out immediately after tightening
of the fastener of the threaded rod (after expiry of the setting time necessary for the chemical anchor).
The check torque to be applied corresponds to 100 % of the installation torque specified for the
fastener of the threaded rod in question; obtain this information from the operating instructions for this
threaded rod.
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