Beckman Coulter UniCel DxC 600, Instructions For Use Manual

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A13914AF
10-6
System Status and Commands
Cuvette Water Blank Status
Cuvette Water Blank Status
Introduction
As a maintenance and troubleshooting aid, the Cuvette Status feature shows the absorbance values
for all 125 cuvettes at each of the 11 wavelengths available on the system (10 for the Photometer and
1 for the LPIA Module). The system derives the data from absorbance values obtained during
automatic water blank tests, which are part of cuvette washing.
From the Status Summary screen, a summary of the cuvette status appears under the Cuvettes Out
of Limit option.
None indicates all cuvettes are clean. One or more dirty and a red highlight indicates
that at least one cuvette has failed the water blank test. Additional information is available under
Show the Cuvette Water Blank Status .
The current values are kept after the system goes to Standby but are lost when the system is reset
or powered off. When absorbance values are lost, the absorbance value will be zero until a water
blank test is run.
Show the Cuvette Water Blank Status
1
Select
Status
from the menu bar. From the
Summary
tab, under
Cuvettes out of limit
either None
or 1 or more dirty appears.
2
Select the
CuvStat
tab.
3
Use the scroll bar to view the various cuvettes.
If any of the absorbances are out of limit, the cuvette number is highlighted in red, indicating the
cuvette has been marked as dirty and are not used for analysis.
The right-most column is the Failed Count (Fcnt). It keeps track of the number of consecutive times
a cuvette has failed the water blank.
What to Do if a Cuvette is Dirty
A cuvette that is marked as dirty is not used for sample analysis but continues to be washed,
attempting to get it clean. If a cuvette repeatedly fails the water blank test, refer to CHAPTER 9,
Maintenance , As-Needed/As-Required Maintenance .
NOTE
If only 940 nm wavelength cuvettes are dirty, the problem is only associated with the LPIA Module. You
can still continue to run chemistries that use the Photometer.