© Edwards Limited 2011. All rights reserved. Page 19
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Operation
D395-93-880 Issue A
4.3.1 Turbo screen
When the Turbo screen is selected, the Turbo LED is lit and the speed of the turbomolecular pump is displayed in
percentage of full speed. If no turbo pump is connected the display shows "---".
4.3.1.1 Starting the pumps
When the START/STOP key is pressed, both the turbo and backing pumps start. The display shows the turbo pump is
accelerating by flashing the top left portion of the percentage sign. When the turbo reaches normal speed (>80%
default) the percentage sign stops flashing and remains steady.
If a Turbo Set-point has been set, only the backing pump starts when the START/STOP key is pressed. The TSP LED
flashes until the set-point has been reached. Once the set-point has been reached the turbo pump starts and the
TSP LED turns OFF. If no Turbo Set-point has been set, the TSP LED remains OFF.
4.3.1.2 Stopping the pumps
To stop the pumps press the START/STOP key; the display will show "Stop" for three seconds. Press the ENTER key
within that time to stop the pumps. If the ENTER key has not been pressed, or the START/STOP or NEXT keys are
pressed, the display returns to Turbo speed and the pumps remain running.
When the Turbo is decelerating the bottom right portion of the percentage sign flashes until the turbo pump has
completely stopped.
4.3.1.3 Turbo screen key actions
Keys Short Press Long Press
START START the Turbo, or
Initialise Turbo STOP sequence, or
Cancel Turbo STOP, or
force Turbo STOP when in Error
-
ENTER Acknowledge Turbo STOP Fault code display when in Error
NEXT Go to Gauge Screen, or
Cancel Turbo STOP
Scroll through menu screens
Turbo
Started
Stop Turbo Turbo
Or
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