4 | Description LINXON
14 / 90 LX218-Operating-Manual-en1-04-(1908)
4 Description
4.1 Function
The device is a leak detector for detecting and measuring leaks in test objects. The
device is suitable for leak detection using the vacuum method and the sniffer method.
• When using the vacuum method the test object is evacuated and subjected to
helium or forming gas from the outside. To do this it is necessary to establish a
vacuum connection between the device and the test object.
• When using the sniffer method an overpressure is established in the test object
using helium or a forming gas. The test object is then inspected on the outside
using a sniffer line.
4.2 Operation modes
4.2.1 Operation mode "Vacuum"
The inlet flange is located on the upper side of the device.
To be able to calibrate using the vacuum mode a suitable external calibration leak
must be mounted on inlet flange. See also "Calibrating in the operation mode
"Vacuum" [}52]".
To be able to perform leak detection using the vacuum method the inlet flange must
be connected to the desired test object.
If the pressure in the specimen is less than the surrounding pressure, then helium
(which is sprayed over the specimen) can penetrate into the specimen if there is a
leak. Helium can be detected in the leak detector using a mass spectrometer.
4.2.2 Operation mode "Sniffing"
You can connect a sniffer line to the device.
Using a sniffer line, you can suck gas into the device to be used for detection.
To scan test objects under overpressure, use the sniffer line.
Connect the sniffer line to the back of the device, see "Connections for accessories
and control signals [}22]". This connector is used both to connect the sniffer line
and to connect the ventilation line.
To Next Page
Loading...