Linxon LX218 - Setting Gross Leak Protection

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Options Value range (min./max.) Comments
With STOP The inlet flange is
automatically vented after
STOP.
Deactivated Venting for the inlet flange
in the "Standby" window is
deactivated.
System venting Start/stop cycles with short
intervals for removing an
increased helium
background.
Activated (factory settings) The following functions are
activated:
Switch off: TMP is flooded
Switch on (only dry
compressing pump):
Diaphragm pump is
flooded
6.4.5 Setting gross leak protection
Standby > Configuration > Test settings > Gross leak protection
At the earliest, activate the gross leak protection after the expiration of the alarm delay
time. See also Setting the setpoint and alarm [}50].
When the gross leak protection is activated, the device closes all inlet valves as soon
as the measured leak rate exceeds the limit value. In this way, only a small amount of
helium will get into the mass spectrometer, so that the device is not contaminated by
helium.
An external pump can pump out helium that has entered the test object. If no external
pump is available, vent the test object before the next measurement.
Options Value range (min./max.) Comments
Protection On Gross leak protection is
switched on
Off Gross leak protection is
switched off
Limit value 1E-9 ... 1E+3 mbar*l/s) Switch-off limit for the
gross leak protection
function