6 | Operation LINXON
52 / 90 LX218-Operating-Manual-en1-04-(1908)
Option Comments
No The calibration request is not carried out.
6.4.10 Calibrating
In order to be able to measure leak rates correctly, the leak detector has to be
adjusted at regular intervals by calibration. The mass spectrometer is adjusted
automatically.
You can perform the calibration using the device internal calibration leak or using an
external calibration leak. Normally, calibration should take place on a daily basis or if
there is some doubt as to the measurement ability of the device.
NOTICE
When using hydrogen or helium-3 (
3
He) as tracer gas an internal calibration is not
possible. In this case, use an external calibration leak.
The operation modes "Vacuum" and "Sniffing" must be separately calibrated when
using an external calibration.
A calibration should only take place when the device is at operating temperature.
Calibrate at least 20 minutes after switch-on.
6.4.10.1 Calibrating in the operation mode "Vacuum"
Faulty calibration with a cold device
Let the device run for at least 30 minutes before you carry out the calibration.
Observe the recommended test interval for the calibration leak used! See the
associated product description.
In the "Vacuum" operation mode, the device is calibrated with an internal or external
calibration leak. An internal calibration is only possible for mass 4. The calibration
mode is defined in the "Calibration settings" menu.
Internal calibration leak
For calibrating with the internal calibration leak, there are two variants.
• Internal automatic: For calibration with the internal calibration leak without volume
at the inlet flange. The inlet flange must be empty.
• Internal manual: For calibration with the internal calibration leak with volume at the
inlet flange. By pressing "Signal stable", it must be confirmed that a stable
measurement signal is present.
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