Waters 2414, Обзор и руководство по обслуживанию

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June 11, 2015, 715004754 Rev. A
Page 76
2. From the Method choice list, press 1, Timed events.
Result:
An active field for entering the time of the event is displayed.
3. Enter the time for the event. When you begin entering the time, additional fields
appear.
Figure 5–8: Timed events screen
4. Press Enter to enter the time.
5. To advance to the Set
field (Events choice list), press the
t
key.
6. Press Enter to display the choice list, or, if you know the event number, press
the number for the event you are programming.
7. Enter the appropriate selection in the To field, if the To field is displayed.
8. Press Next to advance to a new timed event.
9. To delete a timed event, press CE when the time field is active to change it to
Off.
10. Press HOME to return to the RIU mode home screen, and then press Run/Stop
to start the current method or METHOD to return to the method choice list to
store the method.
11. Press Reset to reset the run clock to 0.
If the 2414 RI detector is configured with another external device, the inject start
event programmed from that device starts the method.
Note:
If you are working in real time, under current conditions (method *), in the
event of a power failure or shutdown, you lose all timed or threshold events that were
not previously stored as a method. See “Storing a Method” later in this section.
5.2.4.2 Threshold events
Using threshold events you can control the switch contact closure output to trigger,
for example, a fraction collector. You can program the switch to change its status on
the detector whenever the detector output exceeds a specified threshold RIU value.
This threshold detection ability is available in addition to actuating the switch by time,
as described in the section above. Below the specified threshold, the switch is set as
shown in the following table.
Note:
Threshold events can be programmed only for positive values of µRIU.