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7.3 Transfer Exception Handling
Thus far, it has been assumed that the processing of the samples has not experienced any
issues. A summary of the potential issues that could arise during the sample transfer phase
are listed below:
1. The barcode of the sample being transferred does not match the barcode that was
detected during sample verification
2. The sample could not be found from within the sample tube
3. The tip being used to pick up and transfer the sample has a blockage
When any of the situations listed above arise, the instrument will retry the transfer
2 additional times (making a total of 3 attempts), each time using a new tip. If the initial
issue is not resolved after the third attempt, the instrument will pause, sound an alarm
and bring up a pop-up window as shown in Figure 34.
Figure 34:
The options that become available in the transfer issue pop-up
If the transfer issue states [TipBlocked], the user should check the condition of the tips
being used. Fresh tips should always be used on each run. If the user can find no fault with
the tips, they should check the target sample tube for clots or any other debris that might
result in a blocked tip.
If the transfer issue states [SampleNotFound], the instrument is unable to detect any
meniscus. In this scenario, the user’s first action should be to ensure that there are tips in
the tip rack. If tips are available, the user should ensure there is enough sample volume in
