MTS Series 793 - Manual (Page 52)

MTS Series 793 Tuning and Calibration
Tuning for the First Time
Tuning Procedures 52
Tuning for the First Time
If you are unfamiliar with the tuning controls, review the following guidelines.
Before you start tuning you should:
• Define upper and lower limits for the displacement and force sensor before
you start tuning.
• Tune the displacement control mode first since no specimen is needed.
• Note the value of the tuning control before adjusting it so you can return it to
that value if necessary.
• Make small initial tuning adjustments. If the waveform does not appear to
change, increase the adjustments.
What if you adjust
something wrong?
If you make an inappropriate adjustment, the system will go unstable or shut
down. An unstable system produces a humming or screeching sound. A system
shutdown will display an error message.
If an adjustment causes the system to go unstable, quickly readjust the control
until the noise stops. If you cannot eliminate the sound, shut down the system by
pressing the Station Stop or Emergency Stop switch.
Important In multi-station configurations, pressing Emergency Stop will shut
down the HPU and all stations in the interlock chain. If your system
is equipped with a Remote Station Controller, pressing Station Stop
shuts down the HSM for the specific station only.
If an adjustment causes the system to shut down, readjust the control to the level
where the system was last stable. Then reset the system and continue tuning.
Saving the tuning
parameters
The tuning values are saved as part of the controller parameter set. The parameter
set can save one set of tuning values for each control mode.