Inficon ULTRATEST UL3000 Fab, Translation Of The Original Operating Instructions

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INFICON Operation | 6
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ZERO is switched off. After switching on HYDRO•S the ZERO can be used again.
See "Set and use the function ZERO [ } 67]".
► Switch HYDRO•S by pressing on or off on the measurement screen. By means
of Stop you always switch off HYDRO•S.
HYDRO•S automatic
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HYDRO•S is set to “Automatic”, see “Set HYDRO•S (UL3000 Fab PLUS) [
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64]”.
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The other requirements for the above-mentioned manual operation are also fulfilled.
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The leak detector is in the current measurement range for at least 5 s.
► HYDRO•S switches on automatically.
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HYDRO•S is switched on only once in a measurement cycle (stop / start).
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You can always switch HYDRO•S on and off, even if the automatic
function is activated.
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Manual switching of HYDRO•S deactivates the automatic operation until the
next measuring cycle (stop / start).
6.3.7 Setting the machine factor
If you are measuring in the operation mode "Vacuum" and using an external pump in
parallel, the measured leak rate would be too small in comparison to the leak rate
based on an internal calibration.
If you would like to compensate for this you can multiply the measured leak rate with
the suitable machine factor and then have the value shown. This factor is used only in
the vacuum mode and not in the sniffing mode.
When taking into consideration the Helium pumping speed of the device, the machine
factor can also be estimated. The measurement of the leak rate is more accurate
using an external calibration leak with the test object - once with the external pump
switched and once without. The difference between the results determines the
machine factor.
The machine factor can also be used to correct the leak rate display with respect to
the air equivalence. The machine factor for this correction is 0.37.
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Operator or Supervisor rights
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The operation mode "Vacuum" is set.
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> Setup > Measurement > Calibration leak
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The field “Machine factor helium” is shown.
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Set up.
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Save .