Filter

Chromeleon distinguishes three types of filters:

Data Acquisition Filters

You can set these filters on the Control Panel if the Device Driver of the detector supports this option.

Data Reprocessing Filters

Smoothing filters are often used to improve the Signal-to-Noise Ratio. They allow smoothing chromatograms that have already been recorded. The following smoothing filters are available:

Data Display Filters

  1. Audit Trail Filters: You may specify the filter level for displaying messages on the control panel, in the Report, and in the Printer Layout. This is to avoid that the Audit Trail includes messages that are not relevant to you and thus becomes unnecessarily long. (Refer to Basic Operation  Audit Trails for more information) Errors, warnings, and system messages are always indicated. However, commands and properties are displayed only from the specified level on. The color codes are as follows:

    Errors and Warnings: Only error messages and warnings but no commands are displayed.

    Normal:  green (only the most important commands are displayed)

    Advanced:  yellow (Normal and Advanced level commands and properties are displayed.)

    Expert:  red (Normal, Advanced, and Expert level commands and properties are displayed.)

  2. Commands Filters: Similar to the Audit Trail filters, you may specify the filter level for displaying commands in the Commands dialog box. Select Normal, Advanced, or Expert on the Context menu.

  3. MS Filter: In case of Mass Spectra, you can define the ionization polarity and the ionization voltage for the mass spectrum plot.

    If several ionization settings are used in Full-Scan mode, you may enter an MS filter index on the mass spectra plot of the control panel. This is to display those mass spectra of the TIC signal that correspond to a specified group of settings. For example, index 1 refers to the first line in the Simultaneous acquisitions table (= TICF_1 - in the following example: polarity "+ve", maximum voltage 100 V):