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Prior to performing any Auto-Tune functions in an effort to improve the
controller performance, confirm that the system is a leak free system and
the volume attached to the test port is within the recommended range
(see Appendix A). Additionally, assure that the system has adequate
pressure and vacuum supply (when required).
To perform these Auto-Tune functions, the instrument must be connected to a pressure
supply with the pressure supply set to the proper supply pressure (please refer to the
specifications in Appendix A). On absolute instruments, a vacuum pump must be
connected to the exhaust port.
Disconnect any device under test from the test port. The test port must be connected to a
sealed volume of 5 to 15 cubic inches (80 to 240 cc's).
Use the Rotary knob to select which Auto-Tune procedure is to be performed and then
press the enter key. Select Full to perform the complete Auto-Tune sequence. If selected,
you are not required to run any of the other Auto-Tune functions. Press the enter key.
The ADTS with go through a sequence of controlling to various pressures and
automatically adjusting the control parameters of the valves. The ADTS will display a
message indicating when it is complete with the Auto-Tune procedure. The time required
to complete the Auto-tune procedure can range anywhere from 1 to 2 hours.
If any control valves or the high speed inner loop pressure sensor has been replaced, the
Auto-Tune should be run to characterize the new hardware.
Fan Operation
When operating the system within the ambient conditions listed in the specification, the
fan defaults to the "on" condition when the instrument is powered up. It has a direct
impact on the chassis temperature, and an indirect effect on the sensor oven temperature.
System Software Update Procedure
Calibration and other stored constants are not affected by program updates.
The update procedure requires a PC connected to the RS-232 port on the RUSKA 7750i.
Note
Figure 6-10. Auto-Tune Screen
Note
6
Maintenance
Fan Operation
gme37.bmp
6-13
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