MTS Series 793 - Manual (Page 95)

How to Perform Advanced Tuning Techniques
MTS Series 793 Tuning and Calibration Tuning Procedures 95
A. For Meter Type, select Timed.
B. For Signal, select Spool Position.
C. For Display Mode and Display Units, select Volts.
D. Set a Display Resolution.
Automated Controllers:
A. On the Station Manager window’s toolbar, select Create Meters on
the Meters icon pull-down menu.
B. Select Create Meters again to display a second Meters window.
C. In the Meters window, click the Meter Setup button. Use the Meter
Setup window to define the meter
D. For Meter Type, select Timed.
E. For Signal Selection, select the desired Channel name and Spool
Position for Signal type.
F. For Display Mode, select Volts.
G. Set a Display Resolution.
7. Produce a Spool Position output signal of -10 V DC with the spool driven
into the end cap.
Standalone FlexTest SE Controllers:
A. Reverse the Conditioner > Polarity setting to drive the inner loop
spool into one of the end caps.
B. Adjust Conditioner > Gain until the Meter reads approximately -8 V
DC.
C. Adjust Conditioner > Phase until the Meter displays maximum
voltage.
The phase adjustment matches the phase of the inner loop LVDT
feedback with the 10 kHz demodulator reference signal. This
adjustment provides a maximum output for the maximum LVDT spool
position offset.
Note This adjustment must be set for the initial calibration, servovalve
replacement, cable replacement, or valve driver replacement. Once the
phase is correctly set, readjustment is not necessary during routine
calibration.