Calibrating a Force Sensor
Model 493.02 Controller Service
Calibration
143
B. Using the Dial, adjust the Setpoint for a tensile force
command that is 80% of the full scale range.
C. Verify that your force transducer feedback signal is 80% of the
full scale range.
Automated:
A. Open the Manual Command window, and then click on the
Enable Manual Command.
B. Adjust the Manual Cmd slider on the Manual Command
window for a tensile force command that is 80% of the full
scale range.
C. Use the Station Signals panel to verify that your force
transducer signal equals 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 Tu n i n g
menu) to correct sluggish actuator movement. Increase the reset
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.
Stand-Alone— Path: Setup > Force > Calibration > Cal Type >
Gain/Linearization < Post-Amp Gain
Automated— Adjust the Post-amp Gain control on the
Calibration tab of the Inputs panel.
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