Waters 2489, Overview And Maintenance Manual

Page: 75 / 150

June 11, 2015, 715004752 Rev. A
Page 75
To define the pulse period, or the frequency of a wave, see “Configuring the detector”
on page 63 .
To program a threshold event:
1. Press the METHOD (Shift A/B) key on the detector keypad.
2. Press 2, Threshold events.
Figure 3–19: Threshold events screen
3. Press Enter to advance to the next (Set) field, or press the
s
and
t
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. To set the threshold on the other channel, press A/B.
3.2.10.6 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 73 ).
2. Press 4, Store method *.
Result:
A method number field appears.
3 Pulse Off
4 Rect wave
(rectangular
wave)
Off
Table 3–13: Threshold events “To” parameters (continued)
Number Set to
Below
threshold
switch state