MTS Series 793 - Manual (Page 176)

MTS Series 793 Tuning and Calibration
Force Sensor Calibration
Calibration Procedures 176
B. Verify that your force transducer feedback signal is 80% of the full
scale range.
Automated Controllers:
A. Adjust the Manual Cmd slider for a tensile force command that is
80% of the full scale range.
B. Verify that your force transducer feedback signal is 80% of the full
scale range.
During the initial calibration and tuning of your system, it may require
repeated adjustment for the tensile force command and feedback values to
match.
Note If the actuator response is sluggish and/or the signal value does not
match the command, you will need to adjust the tuning of this control
mode. Increase the proportional gain (P Gain on the Tuning menu) to
correct sluggish actuator movement. Increase the integration value (I
Gain) to help the feedback match the command.
At this point, unless the conditioner is already in calibration, the tensile
force applied to the force transducer will not equal your commanded value.
You will adjust gain in the next step so that the actual tensile force and your
commanded tensile force match.
Example: Suppose your actuator has a 100% tensile force rating of -10 kN.
In this step you would apply -8 kN of command, and even though the station
signals would read -8 kN of feedback, the force standard may only read -4
kN. This shows the conditioner/sensor pair are out of calibration.
10. Adjust the Post-amp Gain control to increase the tensile force reading on
the load standard until it equals your tensile force command.
Standalone FlexTest SE Controllers: Select Setup > Force > Calibration
> Cal Type > Gain/Linearization > Post-Amp Gain
Automated Controllers: Adjust the Post-amp Gain control on the
Calibration tab of the Inputs panel.
11. Apply a compressive force command that is 80% of the full scale range.
Standalone FlexTest SE Controllers:
A. Using the Dial, adjust the Setpoint for a compressive force command
that is 80% of the full scale range.