RR Mechatronics STARRSED RS, User Manual

Page: 153 / 259

15.7.2 - Sample probe fails to go down
Under normal circumstances, the sample probe goes down.
If sample probe fails to go down check the following:
• Sample probe depth wrong. Check the correct sample depth:
Settings - General settings
-
Sample probe
depth
▪ If the sample probe has being set too deep, it will touch the bottom of the sample tube. The
sample probe then pushes the sample tube slightly downwards, and the aspiration cycle will be
aborted.
▪ A broken outer needle may cause a similar fault.
• Check for mechanical obstructions.
• Electronic failure.
▪ Fatal error, call distributor.
• Mechanical failure.
▪ Fatal error, call distributor.
See the Error list for other sample probe errors.
15.8 - Air bubbles
After a normal aspiration, the Westergren pipette must be free of air bubbles. In the following examples
different patterns of air bubbles which can appear in the pipettes are shown. Air bubbles can affect the
sedimentation and are mostly reported as errors and no ESR result is reported.
Usually bubbles are caused by a leakage at the bottom of the pipette. If air bubbles are visible in the pipette,
check the following :
Troubleshooting
MRN-071-2-EN version 7.02 Starrsed RS
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