For some columns the max delta-column pressure (media) is significantly lower than
the max pre-column pressure (hardware). To protect the media if a delta-column pressure
measurement is not available (that is, when column valve V9-C or V9H-C is not used),
the pre-column pressure alarm must be manually set to the value in the column list that
is the lowest of the max pre-column pressure and the max delta-column pressure.
Delta-column pressure alarms
If column valve V9-C or V9H-C is installed the delta-column pressure will be measured,
but the alarm must be set manually if needed.
Set pressure alarms
Pressure alarm limits may be set manually in System Control. The example below de-
scribes how to set the high pressure limit for the column. Other alarms are set in a cor-
responding way.
ActionStep
Select Manual:Execute Manual Instructions... in the System Control module.1
Result: The Manual instructions dialog opens.
•
Select Alarms
and
•
select Alarm pre column pressure.
2
Select Enabled in the Mode field.3
•
Type the high pressure limit in the High alarm field.
•
Click Execute.
4
116 ÄKTA pure Operating Instructions 29022997 AF
5 Prepare the system for a run
5.5 Pressure alarms
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