MTS Systems FlexTest SE Service Information

Model 493.02 Controller Service
Calibrating an LVDT
Calibration
124
7. Reset Linearization Data window to default values.
Stand-Alone—Path: Setup > Disp > Calibration > Cal Type >
Gain/Linearization > <<Reset>>
Automated— Click Reset on the Linearization Data window.
8. Apply a retraction command that is 80% of the full scale range.
Stand-Alone:
A. Use the front panel Dial to adjust the Setpoint for 80% of the
full scale range. Path: Status > Setpoint
B. Verify that your LVDT displacement signal equals 80% of the
full scale range.
Automated:
A. Adjust the Manual Cmd slider on the Manual Command
window for 80% of the full scale range.
B. Use the Station Signals panel to verify that your LVDT
displacement signal equals 80% of the full scale range.
During the initial calibration and tuning of your system, it may
take repeated adjustment for the two 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 reset
integration value (I Gain) to help the feedback match the command.
At this point, unless the conditioner is already in calibration, the
actuator’s physical retraction will not equal your commanded
value. You will adjust gain in the next step so that the actuator’s
physical retraction and your commanded retraction match.
Example: Suppose your actuator has a 100% retraction of -10 cm.
In this step you would apply a -8 cm command, and even though
the station signals would read -8 cm of feedback, the actuator may
retract only -4 cm. This shows the conditioner/sensor pair are out
of calibration.

MTS Systems FlexTest SE Specifications

General

Brand	MTS Systems
Model	FlexTest SE
Category	Controller
Language	English