Tool Calibration
Tool calibration is used to control how well a tool corresponds to a reference transducer.
The calibration value stored in the tool memory is used to adjust the torque value given by the tool’s torque transducer so that the correct torque value is displayed on the tool. The web-HMI displays the date when the tool was last calibrated.
Field | Description |
|---|---|
Last calibrated | Date and time when last calibration was performed. |
Calibration value | Torque value to calibrate against. |
Next calibration date | Date when the next calibration of this tool is needed. |
Preparing the Calibration
Make sure the tool is set up to perform tightening.
Set up the tool with a torque reference transducer (such as the STa6000, STpad or JSB Bench).
Refer to the torque reference transducer User Guide for set-up instructions.
Select a Tightening program with a target torque corresponding to a tightening normally used with your tool.
Calibrating the Tool
The calibration value used for the tool is calculated from the torque readings read from the tool, and the torque reference transducer through the equation below:
New calibration value = Old calibration value × Mean (Reference values / tool values)
On the home view, go to the Management tab and to the Calibration window.
Take note of the old calibration value found in the Calibration value text box.
Make at least three tightenings and use the torque values read from the tool and the reference transducer (ACTA or similar) for calculating the mean torque values.
Calculate the new calibration value using the New calibration value equation.
Store the new calibration value in the tool memory by entering the calculated value in the Calibration value text box and selecting Apply.
After calibration is completed, perform a tightening to verify that the new values are correct.
