Waters 2489, Operator'S Manual

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Detector description 1-3
The detector has the following capabilities:
• Stand-alone programmability – Stores up to five user-defined programs
(or methods) consisting of up to 50 programmable timed events and two
threshold events each.
• Single or dual wavelength – Monitors absorbance at one or two discrete
wavelengths.
• Wavelength verification reference filter – Ensures wavelength accuracy.
• Automatic second order filter – Automatically engaged for wavelengths
370 nm and greater and removed for wavelengths 369 nm or less.
• Spectrum scan and storage – Supports spectrum scan, display,
subtraction, storage, and playback, in addition to standard absorbance
and UV/Vis functionality.
• Cuvette qualification – Facilitates qualification of the detector by
insertion of a standard in a cuvette without breaking any fluid line
connections. Waters qualification kits are available in cuvette form to
support this feature. This feature also allows you to use the detector as a
benchtop spectrophotometer.
• Cuvette sample analysis – Allows the spectrum of any sample placed in
the cuvette to be recorded.
• Method editing and storage – Supports basic method programming,
storage, and retrieval from the front panel.
• Full diagnostic capability – Supports built-in diagnostic tools to optimize
functionality and performance.
• Two contact closure outputs – The detector has two configurable
switches, each of which can accommodate a maximum of +30 Vdc, 1.2-A
current carry, and 0.5-A current switching. The switches (SW1 and
SW2) can trigger fraction collectors and other external devices, as well
as activate based on time, absorbance threshold, or ratio criteria.
• Improved thermal wander management– To mitigate thermal
instability caused by ambient temperature changes, the detector has
improved insulation (for better air flow across the optics bench) and a
variable speed fan that will run at higher or lower speeds as needed.
• Median Baseline Filter (MBF) - A variation of the data mode, the MBF is
intended to decrease the effects of gradient separations on the
chromatographic baseline. The MBF enhances the UV detector's
baseline stability by decreasing its curvature, making the development
of integration methods easier.