Model 493.02 Controller Service
Calibrating an Extensometer
Calibration
186
12. Record conditioner feedback readings at predetermined negative
strain command points.
Note After shutting down system hydraulics, you will enter these
recorded readings on the Linearization Data window.
Stand-Alone:
A. Use the Dial to adjust the Setpoint for a 0% command.
B. Record the calibrator’s readout value and the corresponding
conditioner feedback in the 0% row of your record sheet.
C. Use the Dial to adjust the Setpoint for a -2% strain command.
D. Record the calibrator’s readout value and the conditioner
feedback reading in the -2% row of your record sheet.
E. Repeat steps C and D for other negative strain commands
(typically at -4, -6, -8, -10, -20, -40, -70, and -100 percent of
full scale).
Automated:
A. Adjust the Manual Cmd slider for a 0% command.
B. Record the calibrator’s readout value and the corresponding
conditioner feedback in the 0% row of your record sheet.
C. Adjust the Manual Cmd slider for a -2% strain command.
D. Record the calibrator’s readout value and the conditioner
feedback reading in the -2% row of your record sheet.
E. Repeat steps C and D for other negative strain commands
(typically at -4, -6, -8, -10, -20, -40, -70, and -100 percent of
full scale).