Waters 2998, Overview And Maintenance Manual

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December 5, 2017, 715004753 Rev. B
Page 54
5. Click Close.
4.1.2 How to read lamp energy
Recommendation:
Impurities in the flow cell can affect the reading of lamp energy. Ensure that
the flow cell is clean before you read the lamp energy.
To read the lamp energy:
1. In the console, select 2998 PDA Detector from the system tree.
2. In the PDA detector information window, click Maintain > Read energy > Read.
Result:
The Read Energy dialog box appears.
3. Click Close.
4.1.3 Performing the erbium calibration
Recommendation:
Impurities in the flow cell can affect wavelength calibration. Ensure that the
flow cell is clean before you perform calibration.
Before you begin this procedure, your detector must be set up and configured, as described in
Chapter 2 .
During the start-up verification sequence, the 2998 PDA detector performs an erbium calibration.
You can also start this procedure manually.
Notes:
• This procedure can adversely affect spectral library matching and peak purity calibrations.
• You might need to reacquire spectral libraries each time you perform any calibration
procedure. See
Chapter 5 for more information.
To start a manual erbium verification:
1. In the console, select 2998 PDA Detector from the system tree.
2. In the PDA detector information window, click Troubleshoot > Erbium calibration.
3. In the Erbium Calibration dialogue box, click Optimize Exposures, and then click start.
Result:
The detector moves the filter into the erbium position, locates the 256.5, 378.9 and
521.4 nm erbium absorbance peaks, and locates the 656.1 and 486.1 nm deuterium
emission lines.
Requirement:
The maximum deviation must be within

/

nm.
4. Click Stop.
Result:
The erbium filter moves back to original position.
5. Click Save > OK > Close.
4.1.4 How to read the calibration values
To read the calibration constants:
1. In the console, select 2998 PDA Detector from the system tree.