Model 493.02 Controller Service
Calibrating an LVDT
Calibration
102
10. Check hydraulic and program interlock indicators.
Stand-Alone — If the Hydraulic Interlock or Program
Interlock indicator is lit on the front panel, determine the cause,
correct it, and then click Reset.
Automated — If the Interlock or Program indicator is lit on the
Station Controls panel, determine the cause, correct it, and then
click Reset or Reset/Override.
If either interlock indicator lights again, you will need to
determine the cause of the interlock and correct it before
proceeding.
Do not place any part of your body in the path of a moving actuator.
A crush zone exists between the actuator and any equipment in the
path of its movement. Immediate and unexpected actuator response is
possible when you apply hydraulic pressure to your system. If
servovalve polarity and/or conditioner polarity are set incorrectly, the
actuator may move with full force.
Stay clear of the actuators when applying hydraulic pressure.
11. Apply power to the hydraulic service manifold (HSM).
Stand-Alone — Click the HSM Low button, and then HSM High.
Automated — In the power selection box, click the Power Low
button, and then Power High
12. Check the movement of the actuator.
Perform this step to verify that the actuator moves as you want.
Stand-Alone— Enable the front panel Dial, and then use the Dial
to increase the Setpoint adjustment for a positive command.
Automated — Open the Manual Command window, and then
click on the Enable Manual Command check box to enable
manual command. Increase the Manual Cmd adjustment for a
positive command.
Note The following conditions assume you want a positive command to
extend the actuator.