Waters 2489, Operator'S Manual

Page: 81 / 234

Using the operator interface 3-13
Tip: The parameters you enter into the secondary function fields become part
of the current method conditions and are stored when you store the method
(see
“Programming timed events, threshold events, and methods” on
page 3-35 ).
When in single wavelength mode, the detector displays three additional
screens labeled 2 of 4, 3 of 4, and so on. When in dual wavelength mode, the
detector displays four additional screens, labeled 2 of 5, 3 of 5, and so on (see
page 3-18 ).
Setting up a run
Once you press HOME to return to the absorbance screen and select a
wavelength mode (
λ
or
λλ
), you are ready to set up the detector for a run. In
addition to wavelength mode, you must program the following parameters
before beginning a run:
• Operating wavelength
• Sensitivity
• Time constant
• Analog output sensitivity
Depending on other functions you may want to perform during a run, there
are several other parameters you need to program. The section
“Primary and
secondary functions” on page 3-14 , and the Table titled “Primary and
secondary function (method) parameters” on page 3-19 contain the function
descriptions, fields, screen number, type of function, display units, allowable
ranges, and the default settings for the absorbance screen and the secondary
function screens, for both single and dual wavelength operation.