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Operation
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GA10218_002_A7 - 9/2015 - © Oerlikon Leybold Vacuum
3.2.2 The Display in Run-Up Mode
In run-up mode the display shows:
Speed of the turbomolecular pump
Fore-vacuum pressure
State of emission
Active filament
A bar graph which shows the run-up progress
If the display is too bright or too dark you can change the contrast. Please see
Chapter 3.4.6. During run-up phase the menu button can be pushed to get to the
selection menu.
3.2.3 The Display in Standby Mode
In standby mode the conditions are shown in the upper edge of the display (Fig.
12). Furthermore calibration (Please refer to Chapter 3.13) can also be started in
standby mode and purging, too (Fig. 1/1)
3.2.4 Gas Ballast/Purge
In standby mode the gas ballast of the forepump can be switched on/off manually
or via soft key 7. The gas ballast is for abolishing a too huge helium background.
Additionally a condensation of water vapor in the pump will be avoided. After 20
minutes the machine closes the gas ballast valve automatically to limit the loss of
oil.
This function can be chosen automatically for the PHOENIX L300i MODUL. Every
time the unit changes into standby mode the purge starts automatically for 20 sec-
onds. During this time the scroll pump will be purged by the valve V6.
In case there was a large quantum of water vapor pumped with the machine
please activate the gas ballast for about 20 minutes before running the machine
down.
3.2.5 The Display in Measurement Mode
In measurement mode the leak rates can be displayed in two different modes:
- Numerically, combined with a bargraph 10. Fig. 10.
- As trend: numerically, combined with a diagram (leak rate versus time) Fig. 11.
In the lower right corner of the display (next to the Soft Key no. 8, Fig. 10 and Fig.
11) you will find a symbol that allows to switch between the display modes by
pressing Soft Key no. 8. See chapter 3.2.9 and 3.2.10 for explanations of the dif-
ferent display modes.
Access to calibration (Soft Key no. 5, Fig. 10 and Fig. 11) and access to the
speaker volume (Soft Keys no. 2 and no. 3, Fig. 10 and Fig. 11) is the same in all
modes. Also the status icons in the upper line are in common in both display
modes.