Inficon UL3000 Fab ULTRA - Change Leak Rate Filter; Change Background Suppression

INFICON Operation | 6
UL3000-Fab-ULTRA-Operating-instructions-iinb73en1-09-(2109) 75 / 152
6.3.12 Change leak rate filter
The leak rate filter “I•CAL” is preset. I•CAL ensures that the averaging time is optimally
adapted to the leak rate range.
The abbreviation I•CAL stands for “Intelligent Calculation Algorithm for leak rates”.
This ensures that the signals are averaged at optimal time intervals and this is based
on each leak rate range. I•CAL also determines interference spikes, which bear no
relevance to the leak rate signals and delivers unusually short reaction times even
with low leak rate signals. The algorithm used offers excellent sensitivity and response
time.
With the leak rate filter "Fixed" there is also a filter with a fixed time constant available.
Procedure
ü
Supervisor
rights
1
> Setup > Measurement > ZERO and filter
2
Make a selection between “I•CAL“ and “Fixed” under “Leakage rate filter”.
3
Save .
6.3.13 Change background suppression
The internal background suppression is preset.
The measurement system of the leak detector contains a residual amount of helium
and hydrogen even without connection to a test chamber. This creates an internal
measurement signal component already before pressing the START button.
After activating "Background suppression" the internal background and selectably also
the background in the inlet area is deducted from the leak rate. This happens after
pressing the START button automatically.
ü
Supervisor
rights
1
> Setup > Measurement > ZERO and filter
2
Make your selection in the field “Background suppression“ between “Internal
only”, “Inlet area” and “Switched off“.
ð Internal only
Factory setting. With every measurement the internal measurement signal
component of the device is deducted by pressing the START button. The
accuracy of the measurement results are no longer impaired by the internal
background.
At the time of pressing the button START:
In order to determine a new internal background, the leak detector must be in
standby mode for at least 20 seconds and the flushing or gas ballast valve
must not have been open during this time. If you want to make sure that a
current internal ground is used in the following measuring operation, do not
press START, until the background display in standby has changed from low