• The graph shows the value of the 36 light
scattering detectors. The red line is the factory
values, the black line is the current measurement
and the solid bars are the average of all 20
measurements. If the background is close to
factory levels the message displayed will indicate a
pass or acceptable background. Even if your new
background passes, but is significantly higher than
factory, clean the windows and repeat to verify you
have acquired the best possible result.
• If the water or windows are not clean or if there is a
problem with the instrument, error messages and
suggested actions will be displayed. Dirty water or
windows will generally cause higher values across the
middle rings. Large bubbles or particles in the water
can cause higher values on the inner rings or left hand
side of the display. High values on the inner rings
combined with a lower transmitted laser power value
can also be an indication of optical misalignment. If
needed you can update the background, such as after
cleaning the windows or replacing the water, by
pressing the BEGIN Collect button again.
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