MTS Systems FlexTest SE Service Information

Calibrating an Extensometer
Model 493.02 Controller Service
Calibration
181
During the initial calibration and tuning of your system, it may
require repeated adjustment for the negative strain command and
feedback values to match.
At this point, unless the conditioner is already in calibration, the
negative strain applied to the extensometer will not equal your
commanded value. You will adjust gain in the next step so that the
actual strain and your commanded strain match.
4. Adjust gain until the actual strain equals your strain command.
Adjust the Post-amp Gain control to increase the negative strain
reading on the calibrator until it equals your negative strain
command.
5. Apply a positive strain command that is 80% of the positive full
scale range.
A. Using the Dial, adjust the Setpoint (Stand-Alone) or the
Manual Cmd slider (Automated) for a positive strain
command that is 80% of the full scale range.
B. Verify that your extensometer feedback signal is 80% of the
full scale range.
6. Record conditioner feedback readings at predetermined negative
strain command points.
Note After shutting down system hydraulics, you will enter these
recorded readings on the Linearization Data window.
Stand-Alone:
A. Use the Dial to adjust the Setpoint for a 0% command.
B. Record the calibrator’s readout value and the corresponding
conditioner feedback reading in the 0% row of your record
sheet.
C. Use the Dial to adjust the Setpoint for a -2% strain command.
D. Record the calibrator’s readout value and corresponding
conditioner feedback reading in the -2% row of your record
sheet.
E. Repeat steps C and D for other negative strain commands
(typically at -4, -6, -8, -10, -20, -40, -70, and -100 percent of
full scale).

MTS Systems FlexTest SE Specifications

General

Brand	MTS Systems
Model	FlexTest SE
Category	Controller
Language	English