Waters 2475, Operator'S Manual, Page: 116 / 228

3-44 Using the Detector
and message screen icons” on page 3-5 ) indicates that conditions are not
stored.
If you edit a parameter such as wavelength or EUFS, you are editing the
current conditions (Method *). You may store the method in one of the 10
available method storage slots, or you can replace the current method with
one previously stored. When you retrieve a previously stored method, you
replace the existing method conditions with those of the stored method.
The method number displayed on the home screen is that of the retrieved
method until you make a change. Any parameter change (for example,
wavelength or EUFS) alters conditions so that the original recalled method is
no longer in effect, causing the method number to change to an asterisk.
On startup, the operating parameters at the time the detector was last shut
down are restored. However, any timed events or thresholds associated with
the method are deactivated when power is restored. Thus, on startup, an
asterisk always appears inside the method icon on the home screen.
When the detector is operating under remote control by Empower or
Millennium
32
software, the remote icon appears (see the table titled “2475
detector home and message screen icons” on page 3-5 ).
Programming timed events
You can program up to 48 timed events to the nearest 0.01 minute. As you
enter timed events, each new event appears at the end of the timed event list.
You can specify a time that is not in sequence with the events specified
previously, and the timed event list is sorted automatically when you press
Next. The following table lists the twelve timed events.
Timed event parameters
Number Event Units
Range or
default Specify
channel
1 Excitation
wavelength
nm 200 to 890 Yes
2 Emission
wavelength
nm 210 to 900 Yes
Tip:
The emission
λ
setting must always be at least 10 nm above the
excitation
λ
setting.