MTS Series 793 - Manual (Page 202)

MTS Series 793 Tuning and Calibration
Extensometer Calibration
Calibration Procedures 202
5. Use Auto Zero to zero transducer output.
Standalone FlexTest SE Controllers:
Select Setup > Strain > Offset/Zero > <<Auto Zero>>
Automated Controllers:
Click Auto Zero on the Calibration tab to set transducer’s amplified output
to 0.000 V DC.
Calibrate the negative
output (tension)
This task calibrates the extensometer negative output using the calibration Gain
controls. Since the Gain setting will affect your Delta K setting, you should
always calibrate the negative side first.
To calibrate the negative extensometer output:
1. Set an initial nominal Gain setting of 500.
2. Adjust the calibrator between zero and -100% of the extensometer’s full-
scale range three times. This exercises the extensometer to remove any
hysteresis.
3. Use Auto Zero to zero transducer output.
Standalone FlexTest SE Controllers: Select Setup > Strain > Offset/Zero
> <<Auto Zero>>
Automated Controllers: Click Auto Zero on the Calibration tab to set
transducer’s amplified output to 0.000 V DC.
mechanical input
Indicated output
Δ K > 1 Δ K = 1
Δ K < 1
Gain