MTS Series 793 - Manual (Page 206)

MTS Series 793 Tuning and Calibration
Extensometer Calibration
Calibration Procedures 206
7. Verify that your extensometer feedback signal is 80% of the full scale range.
8. Record conditioner feedback readings at predetermined negative strain
settings.
A. Set the calibrator micrometer to a value that is 0% of the
extensometer’s full scale range.
B. Record the calibrator’s readout value and the corresponding
conditioner feedback reading in the 0% row of your record sheet.
C. Set the calibrator micrometer to a value that is -2% of the
extensometer’s full scale range
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 settings (typically at -4, -
6, -8, -10, -20, -40, -70, and -100 percent of full scale).
F. Reset the calibrator micrometer to a value that is 0% of the
extensometer’s full scale range. Ensure that the conditioner feedback
reading is zero. If necessary, use Auto Zero to achieve this zero reading
9. Record conditioner feedback readings at predetermined positive strain
settings.
A. Set the calibrator micrometer to a value that is +2% of the
extensometer’s full scale range
B. Record the calibrator’s readout value and corresponding conditioner
feedback reading in the +2% row of your record sheet.
C. Repeat steps A and B for other positive strain settings (typically at +4,
+6, +8, +10, +20, +40, +70, and +100 percent of full scale).
10. On the Linearization Data window, enter the calibrator readout values and
corresponding conditioner feedback readings for all command points
previously recorded on a separate sheet.
Standalone FlexTest SE Controllers: Select Setup > Strain > Calibration
> Cal Type > Gain/Linearization > Linearization Data
Automated Controllers: Click Linearization Data on the Calibration tab.
11. Save the sensor file
12. Reassign the sensor file to ensure that the new sensor settings take effect.
13. Repeat steps 8 and 9.