Cedex HiRes - Performing an SST; Performing an SST with Measurements

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Cedex HiRes Analyzer Operator’s Guide
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12.2 Performing an SST
All procedures related to the System Suitability Test can be controlled via the System Suitability Test List. To
access the list, open the Functions menu in the Cedex Control Center and click on SST or directly click on the
SST button in the Cedex Control Center.
The System Suitability Test List provides an overview of all SST checkpoints and their current status. Valid
SST checkpoints are displayed in black while red indicates an invalid checkpoint. SST checkpoints should be
performed at regular intervals; the length of these intervals is specified in the Days Valid column. To confirm a
checkpoint, either manual checks have to be done or measurements need to be performed.
Checkpoints should be confirmed in the daily/weekly work routine and not left until the validity period of a
checkpoint has expired.
12.2.1. Performing an SST With Measurements
If the SST to be performed requires a measurement or series of measurements, do the following:
1
Select SST from the Functions menu on the Cedex Control Center. Alternatively, click on the SST button in
the Shortcuts area of the Cedex Control Center. The System Suitability Test List dialog box will appear.
2
Select the SST checkpoint to be confirmed by clicking on the field to the left of the appropriate line.
3
Click on RUN SST to start the SST procedure. The System Suitability Test Measurement Run dialog box will
appear. The parameter settings can be viewed but not altered.
4
Whether or not the Target Value can be changed depends on the configuration. If the Fixed Target Value
option is not activated, the user will be able to change the target value. However, if the Target Value Check
is activated, the user will have to enter a value within the defined limits (Max. Target Value, Min. Target
Value).
5
Click on RUN to start the SST measurement. The Measurement dialog box will appear and the measurement
will be carried out automatically.
6
Close the Measurement dialog box.
7
Depending on the setting for Measurements required for passing, repeat Steps 1 to 6 as often as re-
quired for this checkpoint (see note below).
The Measurements required for passing value given in the System Suitability Test Measurement Run
dialog box indicates the number of measurements that have to be carried out for a particular checkpoint.
The average value will be calculated from all of the measurements required for a particular SST
checkpoint.
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The average value of all test measurements needs to be within the acceptance range. The acceptance range is
defined by the target value and the Valid Range (in %). In the event of an invalid SST measurement, the system
will immediately be locked. Once in SSTLock, the system needs to be unlocked manually by authorized users
before any further SST or other types of measurements can be carried out.
If the average result of all test measurements for an SST checkpoint is valid, the checkpoint will automatically
be displayed in black.
The System Suitability Test (SST)
Performing an SST