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Strain Calibration
Note
(h) On the keypad, key in the value set on the calibrator
(i) Press ENTER. After about 6 seconds, the STRAIN
(j) Remove the extensometer from the calibrator and
(k) Press the STRAIN BAL key. The STRAIN BAL
5-24
full scale. For example: If using an extensometer
with a 1-inch gauge length and a 10% maximum
strain, adjust calibrator to 0.100 inches.
(2) To calibrate the extensometer over a range of in-
terest (most accurate method), adjust the calibra-
tor to the maximum displacement value required.
For example: If using an extensometer with a 1-
inch gauge length and a 10% maximum strain,
and a 1% strain is the range of interest (refer to
Note below), adjust calibrator to 0.010 inches.
Do not calibrate a 2630 Series strain gauge
extensometer below 10% of its full scale range.
Otherwise, the accuracy will not be within speci-
fications.
in Step g, part 1 or 2 above. If the strain operating
mode is displacement, enter the value in millimeters
or mils. If the strain operating mode is percent, enter
the percent strain corresponding to the displacement
of the calibrator (10.00 for 10%, 1.000 for 1%, etc.).
CAL LED goes out, the display goes blank and cali-
bration is completed.
clamp it onto the specimen at gauge length, as de-
scribed in the manual supplied with the extensometer.
LED lights.
M10-94400-1
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