Sequoia LISST-200X, Руководство пользователя

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LISST-200X Operation Details 30 LISST-
200X User’s Manual
•
The graph shows the value of the 36 light
scattering detectors. The red line is the factory
values, the blue line current background saved on
the instrument. A newly collected background will
be displayed as a solid black line. 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.
Acceptable Background
•
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
Collect New Background button again.
Unacceptable
Background
4
•
In general, the lower the background values the better
the background. The goal is to get values that are at
the same values as factory line. However, as the
instrument is used the background may increase due
to small scratches and slight alignment changes. It
may not be possible to get the background down to
the original factory values.