MTS Series 793 - Manual (Page 129)

Shunt Calibration
MTS Series 793 Tuning and Calibration Calibration Procedures 129
8. Remove the shunt.
Standalone FlexTest SE Controllers:
Set the Shunt State (+) control to Off.
Automated Controllers:
In the Shunt tab, click the button with one white bar to remove the shunt.
The bar in the button will turn red .