MTS Series LX Laser Extensometer - Manual (Page 54)

LX Laser Extensometer
Calibration
Operation 54
9. The Set Upper Length screen is now displayed on the LCD display. This
value sets the displacement of the upper calibration point from the zero
reference position of the calibration fixture; 1.0000 is the default value.
10. Press the Select button to accept this value, or, use the Scroll button (as
described earlier) to change it. Press the Select button to continue.
11. The Set Zero Offset screen is now displayed on the LCD display.
12. After the reading on the LCD display of the laser extensometer has
stabilized, press the Zero button on the laser extensometer. The reading on
the LCD display of the laser extensometer is now at 0.0000 and if the lower
length calibration point was set to a number other than 0.0000 (in steps 6
and 7), the
move to __ . _____ in screen is displayed (lower length calibration point).
Otherwise, the MOVE TO __ . _____ in screen is displayed (upper length
calibration point).
13. Set the digital micrometer head of the calibration fixture exactly to the value
requested on the LCD display.
14. After the reading on the LCD display of the laser extensometer has
stabilized, press the Select button.
15. If the lower length calibration point was set to a number other than 0.0000
(in steps 6 and 7), the MOVE TO __ . _____ in screen is displayed. You
must set the digital micrometer head of the calibration fixture exactly to the
value requested on the LCD display, and, after the reading on the LCD
display has stabilized, press the Select button. Otherwise, skip over this step
and go directly to step 16.
16. The Calibrate Done screen is now displayed.
17. To save this new calibration and exit to Run mode, press the Run button. To
go through the calibration procedure again press the Select button.
To Defeat the Calibration Constants
At the CALIBRATE screen, hold the Scroll button in and press the Select button
to defeat the slope calibration constants. This procedure sets the Y=Mx
calibration constants as follows: M, the slope correction factor, is set to 1.0.
Consult MTS for further information regarding calibration.