96 1260 Infinity Micro Degasser Service Manual
12 Hardware Information
Operating Principle
Operating Principle
The micro vacuum degasser has a startup mode, 2 standard operation
modes and not ready / error modes:
• In startup mode the vacuum pump constantly works at maximum
speed, while the pump is being tested and cleaned for a 2 minutes time
period, with the proportional valve being open. After the testing phase,
the proportional valve is closed and the instrument is brought to
vacuum. The “NOT READY” mode (yellow status indicator) is activate
during the degasser’s startup phase.
• In the normal operation mode the vacuum degasser is constantly
operated at a pressure of 60 +/- 3 Torr. The speed of the vacuum pump
is kept at a constant level, while the “bypass- leak” the proportional
valve is varied in order to keep the pressure/degassing level inside the
vacuum chambers constant. If the set vacuum level cannot be
maintained, while the pump is operated at a constant voltage of 12 V
(pump rate 1), the pump is switched to a constant voltage of 24 V
(pump rate 2).
• The ERROR mode (red status indicator) is activated in case the
degasser cannot achieve a vacuum level of 180 Torr.
(1 Torr = 1.33x10
-3
bar)
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