# RTP - Residual Torque/Peak

This step guides the user in measuring the residual torque on a joint by detecting the peak torque necessary to rotate the screw further.

Parameter | Description
--- | ---
Target angle | If = 0, the residual torque result is the detected peak torque value, regardless of the angle value. If > 0, the residual torque result is measured at the specified Target angle value (starting from the Trigger torque) instead of taking the peak torque value.
Trigger torque | Defines the torque value from which the angle measurement starts (usually set to 50% of the Target torque). If Trigger torque = 0, its value is automatically set to the smartHEAD Min torque value.
Ratchet time | Starts when the torque goes below the Rundown complete torque without reaching the 3rd percentage value. This allows the operator to release the torque for a while and recharge during the tightening operation. Default value: 5 sec. Minimum value: 0.1.
Torque correction coefficient | When extensions are used, the wrench measurement might be compensated to show a more accurate torque value. To calculate the correction coefficient, please refer to How to calculate the Torque Correction Coefficient. The parameter is stored in the RFID TAG of the end fitting tool. When extensions are not used, Torque correction coefficient = 1.
Angle correction | When extensions cause additional wrench bending, the wrench angle measurement can be compensated to show a more accurate angle value. To calculate the correction value, please refer to How to Calculate the Angle Correction. The parameter is stored in the RFID TAG of the end fitting tool. When extensions are not used, Angle correction = 0.