Calibrating an LVDT
Model 493.02 Controller Service
Calibration
121
F. Repeat steps D and E for other retraction 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 dial indicator value for the 0% command.
C. Enter the corresponding conditioner feedback reading in the
Conditioner column at the appropriate row in the window.
D. Adjust the Manual Cmd slider for a -2% retraction command.
E. Record dial indicator value and conditioner feedback at the -
2% row of your record sheet.
F. Repeat steps D and E for other retraction commands
(typically at -4, -6, -8, -10, -20, -40, -70, and -100 percent of
full scale).
5. Record dial indicator and conditioner feedback readings at
predetermined extension command points.
Stand-Alone:
A. Use the Dial to adjust the Setpoint for a +2% extension
command.
B. Record the dial indicator and conditioner feedback values at
the +2% row of your record sheet.
C. Repeat steps A and B for other extension 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 +2% extension
command.
B. Record the dial indicator value and conditioner feedback at
the +2% row of your record sheet.
C. Repeat steps A and B for other extension commands
(typically at +4, +6, +8, +10, +20, +40, +70, and +100 percent
of full scale)
6. Turn off system hydraulics.