Waters 2489, Operator'S Manual

Page: 80 / 234

3-12 Preparing the Detector
Navigating the user interface
To operate the detector:
1. Press the Enter key or the up and down arrow keys to navigate among
editable fields on a display.
Tip: A thick border appears around the active field.
2. Press Enter to advance the active field once you have completed an
entry.
3. When you make an error, press CE (Clear Entry) to undo any changes
and return to the active entry field.
Tip: An active field containing a choice list is indicated by a number to
the right of the field within the thick border.
4. To display a choice list, press Enter. Then do one of the following:
• Press the corresponding number key to select an item immediately.
• Use the up and down arrow keys to scroll through the list, then
press Enter.
Tip: If you know the number corresponding to the desired choice, you
can press that number without pressing Enter first.
Rule: The up and down arrow keys do not increment or decrement numerical
field entries. Use the numerical keypad.
Navigating to and from the absorbance screen
Pressing HOME from most screens brings you to the absorbance screen. From
the absorbance screen, you can access several secondary functions. To move to
the secondary function screens of the absorbance screen, press Next. The
secondary functions include:
• Analog output specifications
• Time constant
• Absorbance offset
• Voltage offset
• Chart polarity
• Enable/disable inputs
• Enable/disable external events