June 11, 2015, 715004752 Rev. A
Page 62
You can change the ending time parameter to any number from 1 to 60. You can
use the Scale function to “zoom” in on a particular section of the trace.
To display the Scale parameters after you press the Scale key:
1. Press Next to display T2 (starting time).
Tip:
The default is 0.
2. Press Next again to display AU1 (starting or low absorbance).
Tip:
The default is Auto.
3. Press Next again to display AU2 (ending or high absorbance).
Tip:
The default is Auto.
By entering appropriate times and absorbance numbers in the four scaling
parameter boxes, you can zoom in on one section of the current absorbance
trace:
•
For AU1 and AU2, press CE to reset to auto.
•
T1 represents the left-hand side of the trace, or ending time to be
displayed. The default is –30.
•
T2 represents the right-hand side of the trace, or starting time. The default
is 0.
The figure below shows a 60-minute trace of continuous injections of caffeine
and propyl paraben in 1:1 methanol/water.
Figure 3–6:
Scaled trace of continuous injections, with T1 changed to –60
The figure below shows a 5-minute, scaled trace (or an enlarged, zoomed, image) of
the 60 minutes of continuous injections shown in the previous figure. T1 is changed to
–5. T2 is changed to 0. AU1, and AU2 remain as “auto.”
Figure 3–7:
Scaled trace for 5 minutes of continuous injections, with T1
changed to –5
The figure below shows a 60-minute scaled trace similar to that shown in the
preceding figure, with the starting absorbance or AU1 changed from auto to 1. T1
remains at 60. T2 remains at 0.
Summary of Contents for 2489
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