Model 493.02 Controller Service
Calibrating an Extensometer
Calibration
190
6. Perform shunt calibration.
Stand-Alone:
Path: Setup > Strain > Calibration > Select Cal Type >
A. Select required Shunt Display units.
B. Ensure that Shunt State (+) is set to On. Polarity is always
positive.
Note the Shunt Reference (+) value, it should be 60%–90%
(80% is ideal) of the calibrated range of the sensor.
C. Click Update to copy the current shunt reference value into
the Shunt Reference box.
D. Set Shunt State (+) to Off.
Automated:
A. In Station Setup select the appropriate strain channel on the
navigation panel., click the Channel Input Signals icon, and
then click the Shunt tab.
B. Select the shunt type. Use (+) polarity if you are not sure
what to select.
C. In the Current Shunt Value box, click the On button. Note
the Current Shunt Value, it should be 60%–90% (80% is
ideal) of the calibrated range of the sensor.
D. Click Update to copy the Current Shunt Value into the
Shunt Reference Value box, and then click Off.
Task 7 Save the calibration settings
It is important that you save your sensor calibration values.
Path: Setup > Open/Save Parameters > <<Save>>