Scanning Spectra - Waters 2487 Dual A Operator's Manual

Clearing Events
You may want to clear only timed or threshold events without resetting any other operating
parameters. To clear all active timed or threshold events:
1. Return to the Method choice list by pressing
2. Press
A message screen appears
active events.
3. If you press Enter:
3
4. When you return to the Absorbance screen by pressing HOME, the method
number icon displays an asterisk.

3.4 Scanning Spectra

Overview
The 2487 Detector must make two types of scan to produce an absorbance spectrum:
• Zero scan – A reference scan that characterizes the absorbance spectrum of the
solvent in the cuvette or the flow cell.
• Sample scan – An absorbance scan of the analyte in solvent (after subtracting out
the zero scan of the solvent) to provide the actual spectrum of the sample.
The 2487 Detector can measure the spectrum of a sample using either the cuvette or the
flow cell. See
Using a Static Flow
126 Using the 2487 Detector
6, Clear events.
Figure 3-25 Clear Events Message
• All timed and threshold events in the method are cleared
• All other operating parameters of the method (λ, AUFS, etc.) are unaffected
If you press Cancel (Shift
Section 3.4.7, Scanning Using the
Cell, for scanning procedures.
METHOD (Shift
(Figure 3-25) asking you if it is okay to clear all
0), the display returns to the Method choice list.
Cuvette, and
A/B).
Section 3.4.8, Scanning