MTS Series 793 - Manual (Page 172)

MTS Series 793 Tuning and Calibration
Force Sensor Calibration
Calibration Procedures 172
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.
4. 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.
5. Apply a compressive force command that is 80% of the full scale range.
Standalone FlexTest SE Controllers:
A. Using the front panel Dial, adjust the Setpoint for a compressive 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.
Automated Controllers:
A. Adjust the Manual Command slider for a compressive force
command that is 80% of the full scale range.
B. Use the Station Signals panel to verify that the compressive force
signal is approximately equal to 80% of the full scale range.
6. Record force standard and conditioner feedback readings at predetermined
tensile force command points.
Note After shutting down system hydraulics, you will enter these recorded
readings on the Linearization Data window.
Standalone FlexTest SE Controllers: