Automatic torque calibration

An apparatus comprising:

• a communications interface configured to establish a wireless communications link between a rotational tool and a calibrator to communicate one of a tool torque measurement or a calibrator torque measurement via the communications link;
• and
• calibration processing circuitry configured to:
• receive the tool torque measurement measured by a tool torque sensor of the rotational tool;
• receive the calibrator torque measurement associated with the tool toque measurement, the calibrator torque measurement being measured by a calibrator torque sensor of the calibrator;
• compare the tool torque measurement to the calibrator torque measurement to determine a difference value;
• aggregate the difference value with previously determined difference values to determine an updated torque calibration factor;
• and
• cause a torque calibration factor associated with a torque sensor of the rotational tool to be automatically replaced with the updated torque calibration factor in the memory of the rotational tool.

A method comprising:

• receiving a tool torque measurement measured by a tool torque sensor of a rotational tool;
• receiving, via wireless communications, a calibrator torque measurement associated with the tool toque measurement, the calibrator torque measurement being measured by a calibrator torque sensor of a calibrator;
• comparing the tool torque measurement to the calibrator torque measurement to determine a difference value;
• aggregating the difference value with previously determined difference values to determine an updated torque calibration factor;
• and
• causing a torque calibration factor associated with a torque sensor of the rotational tool to be automatically replaced with the updated torque calibration factor in the memory of the rotational tool.