Operation of the ul5000, Display 41, The screen in run-up mode – INFICON UL5000 Dry Helium Leak Detector User Manual
Page 41: Display in stand-by mode, 1 display, 2 the screen in run-up mode, 3 display in stand-by mode
Operation of the UL5000
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Operation of the UL5000
The UL5000 is switched on by pushing the mains switch (See Chapter
). After about 2.5 min the run-up procedure is finished; the unit is in
Stand-by-mode and ready to measure.
Please connect the part to be tested to the inlet port and press START. The UL5000
starts to evacuate the part. The evacuation time depends on the volume of the test
part. During evacuation the screen shows the inlet pressure online.
Once the pressure of 15 mbar (11 Torr or 1500 Pa) is reached the unit switches to
measurement mode. The corresponding leak rate is displayed. For further explana-
tions of the screen please refer to
The displayed leak rate corresponds to the helium background concentration in the
part under test. Since the UL5000 continues to pump down the part this background
leak rate will further reduce. As soon as the leak rate is low enough in respect to your
requirements you may start spraying Helium to search for possible leaks.
When you are finished please press STOP and hold the button a few seconds to vent
the part under test.
5.1
Display
The display is used to either show leak rate signals or program specific set-ups and
get information by means of the software menu (See Chapter
). In addition messages and maintenance instructions are displayed on the
5.2
The Screen in Run-Up Mode
In run-up mode the display shows:
•
Speed of the turbo molecular pump
•
Foreline pressure
•
State of emission
•
Active filament
•
A bar graph which shows the run-up progress
Notice: If the display is too bright or too dark, please refer to Chapter
.
5.3
Display in stand-by mode
In stand by mode the states are shown in the lower edge of the display (See Chapter
). Furthermore calibration (See Chapter
) can also be started in stand by mode
and purging, too (See Chapter