Operation of the ul1000 and ul1000 fab, Display 48, The screen in run-up mode – INFICON UL1000 Helium leak detector User Manual

Page 48: 1 display, 2 the screen in run-up mode

Operation of the UL1000 and UL1000 Fab

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Operation of the UL1000 and UL1000 Fab

The UL1000 and UL1000 Fab is switched on by pushing the mains switch (Please
refer to Chapter

3.2.1

Start up and Measure

). After less than 3 minutes, the start up

is completed; the leak detector is then ready to be used for measurements (Standby
mode).

Please connect the part to be tested to the inlet port and press START. The UL1000
and UL1000 Fab 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
explanations of the screen please refer to

Fig. 5-1

The displayed leak rate corresponds to the helium background concentration in the
part under test. Since the UL1000 and UL1000 Fab 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 (Please refer to Chapter

Description of the Menu

). In addition messages and maintenance instructions are

displayed on the screen (Please refer to Chapter

Error And Warning Messages

5.2

The Screen in Run-Up Mode

In run-up mode the display shows:

•

Speed of the number of revolutions

•

Foreline pressure

•