Operation
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GA10218_002_A7 - 9/2015 - © Oerlikon Leybold Vacuum
Maximum evacuation time
Main menu > Settings > Monitoring functions > Maximum evacuation time
This menu item is used to define when the gross leak message is to occur. The
gross leak detection process operates in two steps and the limits can be adapted
as required.
This menu item is particularly useful in series testing under the same conditions at
all times.
After pressing the start button the test sample is evacuated. If the pressure condi-
tions (p1 < 100 mbar) are not attained, or if the pressure does not drop low enough
within the periods of time specified here, the pump down process is terminated
and the display will indicate a message (see Ch.Trouble shooting, W75 and W76).
The periods which are selected in each case depend firstly on the desired reaction
time for the gross leak message, and secondly on the volume of the test sample
and the effective pumping speed.
If the evacuation time was set to endless, the oil level of the mechanical pump
should be checked more often.
Contamination Protection
Main menu > Settings > Surveillance > Contamination Protection
If enabled, this mode will cause the PHOENIX to close all inlet valves as soon as the
measured leak rate exceeds the programmed limit. Once the START key is
pressed, the value must drop below the limit once as the function will otherwise be
Softkey No. 7: Pressure limits for sniff mode
Definition of the upper and lower limit of the sniffer pressure
Softkey No. 2:
Decreasing maximum evacuation time until p1 < 100 mbar. Within this
period of time the inlet pressure at the test flange must have dropped
below 100 mbar. The duration may be selected freely between 1 second
and 9 minutes or can be set to endless. The default is 30 seconds.
Softkey No. 3:
Decreasing maximum time until measurement. Within the period of this
time the status of measurement readiness must have been attained, i.e.
the inlet pressure must have dropped below 15 mbar. The duration may
be freely selected between 5 seconds and 30 minutes or can be set to
endless.
Softkey No. 5:
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Help text
Softkey No. 6:
Increasing maximum evacuation time until p1 < 100 mbar
Softkey No. 7
Increasing maximum time until measurement.
Maximum evacuation time
Contamination Protection
