MTS Axial Extensometers - Manual (Page 45)

Calibration 45
C. Adjust the gain control to set the extensometer signal to -8 V
DC (or 80% of your calculated output).
4. Readjust the zero and compression.
Repeat Step 2 and Step 3 until the zero and gain outputs can be
measured without readjustment.
5. Adjust tension.
.
Since a true measurement is from the middle of each extensometer
arm knife edge, you must add the thickness of one of the knife
edges.
A. Measure the extensometer arms as shown. You will need to
pinch the extensometer arms to contact the caliper.
B. Adjust the caliper for a 80% tension displacement (or the
maximum positive travel). Remember to add the thickness of
one arm.
C. Check the meter reading.
• If the extensometer signal is above +8 V DC (or 80% of your
calculated output), adjust delta K for an extensometer signal
of +8 V DC.
True
Measurement
m