MTS Series 793 - Manual (Page 209)

Extensometer Calibration
MTS Series 793 Tuning and Calibration Calibration Procedures 209
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).
11. Record conditioner feedback readings at predetermined positive strain
calibrator 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).
12. On the Linearization Data window, enter the calibrator values (Standard)
and its corresponding conditioner feedback readings (Conditioner) for all
command points previously recorded on a separate sheet.
13. Verify linearization data.
A. Set the calibrator micrometer for each strain setting on the
Linearization Data window.
B. At each setting, verify both the calibrator readout value (Standard) and
its corresponding conditioner feedback value (Conditioner).
C. Check validity before entering each pair of values on a new Calibration
Data sheet.