© Edwards Limited 2012. All rights reserved. Page 27
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Operation
A591-40-880 Issue A
4.8.3 Auto Tune configuration
The target chamber pressure and other Auto Tune parameters can be configured using the PDT by the Auto Tune
configuration menu. From the Auto Tune menu, use the up and down arrows to scroll to Auto Tune Cfg... - press
ENTER.
To set the target pressure
1. Select Target Pressure on Auto Tune Cfg… Menu.
2. Press ENTER.
3. Use up and down arrows to set target pressure.
4. Press ENTER to confirm.
All other parameters are set to factory defaults. Please contact Edwards for advice on setting these values for your
application.
4.8.4 Starting the Auto Tune process
From the Auto Tune menu on the PDT:
1. Scroll down to Run and Stop – press ENTER.
2. The message displayed will be YES (press ENTER).
3. Press ENTER to confirm.
The Auto Tune process will start automatically and will run until completion. This will normally take several minutes.
The running speed determined during the process will be saved as the normal speed for the pump.
4.8.5 Monitoring Auto Tune progress
While the Auto Tune process is running it is possible to monitor progress by the Status option on the Auto Tune menu.
Information such as current pressure reading from the gauge, the current speed setting and the time left until the
next step in the process is available. There are two status pages available – use the up and down arrows to view them.
4.8.6 Cancelling the Auto Tune process
To cancel the Auto Tune process while it is running:
1. Select Run and Stop from the Auto Tune menu.
2. Use the up and down arrows to display STOP and Reset.
3. Press ENTER to confirm.
The Auto Tune process will stop and the normal running speeds will be set back to untuned default values.
4.8.7 Returning the pump to factory default speeds
To return the pump to factory default speed select STOP and Reset from the Run and Stop menu. This command will
always reset the pump and booster speeds back to their untuned defaults, even if the Auto Tune process is not
running.
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