Waters 2489 - Timed Events

3-36 Preparing the Detector
The method number displayed on the absorbance screen is that of the
retrieved method until you make a change. Any parameter change (for
example, wavelength or AUFS) alters the current conditions so that the
original recalled method is no longer in effect, causing the method number to
change to an asterisk.
The operating parameters at the time of system shutdown are restored;
however, any timed events or thresholds associated with the method are
deactivated when power is restored. On startup, you always see an asterisk
inside the method icon on the absorbance screen.
When the detector is operating under remote control, that is, control by
Empower or MassLynx software, the remote icon containing the letter E
appears (see the table on page 3-4).
Timed events
You can program up to 50 timed events to the nearest 0.01 minute. As you
enter timed events, each new event is appended to the end of the timed event
list. If you enter a time that is not in sequence with the events entered
previously, the timed event list is sorted automatically when you press Next.
The detector allows programming of the timed events shown in the table
below.
Caution: Changing the sensitivity (AUFS) setting affects the 2-V
output. For example, 1 AU gives 0.5 AU/V and 2 AU gives 1 AU/V.
Timed event parameters
Number Event Units Range or Default
Specify
Channel
1 Wavelength nm 190 to 700 Yes
2 Filter time
constant
Seconds 0: Disable filter
λ: 0.0125 to 5.00
λλ: 0.5 to 5.0
Yes
3 Sensitivity AUFS 0.0001 to 4.0000 Yes
4 Chart mark
(10% of full
scale)
Does not
apply
Does not apply Yes
5Polarity1. +
2. –
+Yes