Waters 2475, Operator'S Manual, Page: 142 / 228

3-70 Using the Detector
Using a timed event method to program the lamp
You can conserve lamp life by programming it to light and extinguish (for
example, overnight) using a timed event method. To program the lamp, select
Timed events in the Method list, or program it through one of the external
contact closures. See “Programming methods and events” on page 3-43 and
the table titled “Timed event parameters” on page 3-44 for more information
on programming the lamp to turn on or off using a timed event. See
“Configuring event inputs and contact closures” on page 3-25 for more
information on programming the lamp through the external contact closure.
Shutting down the detector
Before you shut down the detector, you must remove any buffered mobile
phase present in the fluid path.
To shut down the detector:
1. Remove buffered mobile phase from the fluid path, replace it with 100%
HPLC-quality water, and flush the system for 10 minutes at 3 mL/min.
2. Replace the water mobile phase with a solution of 90:10 methanol/water,
and flush the system for 10 minutes at 2 mL/min.
3. Follow the manufacturer’s recommended procedures for injector purging
and pump-priming.
4. To shut down the detector, press the on/off switch on its front,
lower-right-hand corner.
Caution:
To avoid damaging to your column, remove it before you
perform the following procedure.