Waters 2489, Operator'S Manual

Page: 108 / 234

3-40 Preparing the Detector
To program a threshold event:
1. Press the METHOD (Shift A/B) key on the detector keypad. The Method
choice list appears (
Figure “Method choice list” on page 3-37 ).
2. Press 2, Threshold events. An active field (AU) for entering the
threshold appears. When you begin to enter a number in the AU field,
additional fields appear.
Threshold events screen
3. Press Enter to advance to the next (Set) field, or press the
▲
and
▼
keys
to move among the three fields on the threshold events screen.
4. When the Set field is active, press Enter to display the threshold events
choice list, or press the number corresponding to the event you are
programming (see the table above).
5. When the To field is active, press Enter to display the options in the
table shown above or press the number corresponding to the threshold
parameter you are programming.
6. Press A/B to set the threshold on the other channel.
Storing a method
A method consists of all programmable parameters on the absorbance and
associated screens, as well as timed and threshold events. You can store the
current method by selecting a location from 1 to 5.
To store a method:
1. Press METHOD (Shift A/B) to return to the Method choice list (see the
figure on
page 3-37 ).
2. Press 4, Store method *. A method number field appears.