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reflectance, using a fiber probe, hold at 45 deg to your
white standard about 1/4 inch away. For cuvette holders,
use cuvette in place with no sample. For dip probes,
use your solvent solution for reference.
The curve MUST NOT touch the top of the graph. If the
slider bar on the toolbar is already max (for fastest
detector integration rate), then you must reduce the
input signal by using a smaller fiber or insert a filter.
For reflectance, just move the tip back from the white
standard (reference) surface. For others, you may test
this out by backing out the SMA 905 fiber optic connector
from either the light source or spectrometer.
2. We recommend you start with (and setup) the following
configuration until you are familiar with the options.
Use the Setup menu:
Detector integration rate = 50 millisec
Number of Scans to average = 5 (if below 100 ms)
Pixel resolution (smoothing) = 0 (NONE)
Temperature Compensation = 1 (ON)
Note: if the first 3 items are changed, then you
MUST AGAIN save a new "dark" and "reference" scan.
3. Adjust the detector integration until the bell curve
fills 90 percent of the graph. The longer that the
detector integrates, the larger the input signal.
Perform a File ->Save-> Reference from the menus or
click the yellow light bulb icon on the toolbar.
4. Now block the light at your light source. If you
can't then you will have to turn it off for a moment.
Perform a File ->Save ->Dark or click the dark light
bulb on the toolbar.
5. At this point you are ready to view Absorbance or
Transmission using the View menu selection.
Absorbance and Transmission should appear as flat
lines. Insert your sample and observe the response
in realtime. You may now save to disk or print the
sample graph.
////////////////////////////////////////////////////////////////
ToolBar Icons //////////////////////////////////////////////////
Move Data Cursor [picture of graph with arrow left/right]
left <- "After" placing the data cursor by pointing
right -> and clicking the right button, each
subsequent click here (using the left button)
will move 1 pixel in direction selected.
To remove data cursor click to left of graph.
>>> Clicking the right button on these icons
will seek to the next peak in the selected
direction, and place the data cursor there.
File save [picture of diskette]
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