Inficon ULTRATEST UL3000 Fab, Translation Of The Original Operating Instructions

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INFICON Operation | 6
UL3000-Fab-Operating-instructions-iina73en1-08-(1910) 57 / 140
ð
"Leak rate proportional": The frequency of the audible signal is proportional to
the bar graph display or diagram height. The frequency range is 300 Hz to
3300 Hz.
ð
"PINPOINT": The sound of the acoustic signal changes its frequency within a
specific range of leak rates. This range extends from a decade below the
selected setpoint value to a decade above. Below this leak rate range, the
sound is constantly low, above the sound is constantly high.
ð
"SETPOINT": The pitch is proportional to the leak rate. The signal sounds if
the leak rate exceeds the set setpoint 1. See also "Setting setpoints [ } 62]".
ð "TRIGGER": If the set setpoint 1 is exceeded, then a two-pitch signal is
issued. See also "Setting setpoints [
}
62]".
5 If you want to suppress the alarm for some time after pressing the START
button, then set “Audio alarm delay“. For example: Time period during the pump
down of a test chamber system.
ð After pressing the START button the audible signal is activated as soon as
the leak rate falls below the setpoint value 1 or the alarm delay time expires.
This setting is only for the audible alarm type “SETPOINT“ and “TRIGGER“.
6
If you wish to have notification beeps, activate the option "Notification beep".
7
Save .
6.2.10 Change the protection settings
You can protect the device from Helium contamination with gross leaks and from the
penetration of particles. Furthermore, you can change the maximum evacuation time.
ü Supervisor - rights
1 > Setup > Measurement > Protection
2 If you want to switch-on the gross leak protection, activate the option "Gross
leak protection" and set under "Gross leak protection limit" a shut-down
threshold.
ð The device closes the inlet valve as soon as the measured leak rate exceeds
the shut-down threshold. This will prevent an excess amount of helium from
entering the mass spectrometer. Consequently, the leak detector is prevented
from becoming contaminated by Helium. The helium entering the specimen
can be pumped out using an external pump. If no external pump is being
used, we recommend that the test object is vented before continuing with the
measurement.
3 If you want to prevent particles from being sucked into the device make sure
that the test object is first pumped down with another parallel running pump.
Activate the option "Particle protection" additionally.
ð The leak detector only starts with the pump down once the inlet pressure has
fallen below 1 mbar.