Waters 2414, Overview And Maintenance Manual

Page: 103 / 130

June 11, 2015, 715004754 Rev. A
Page 103
lower value). The oven’s actual temperature and its set point are displayed. You can
edit the set point in this screen. The presence or absence of an external column
heater module is also indicated.
7.2.5.3 Simulate peak
From the Other diagnostics choice list, press 3, Simulate peak to generate test peaks
on the chart, trace, or other output.
Note:
When the simulate peak diagnostic function is enabled, the wrench icon
appears in the Home screen.
To specify the exact peaks:
1. Enter a peak height, in µRIU, from 1 to 999.
Note:
In 410 mode, the peak height is converted from RIU to the
corresponding value, depending on the sensitivity setting.
2. Enter a peak width in seconds.
Requirement:
The width must be greater than 0 or less than or equal to the
period of peak repetition.
3. Enter a period for repeating the peaks, in seconds, from 1 to 99.
4. Press the Run key.
Result:
The generation of the peaks is indicated by the real-time display of the
change in peak height in µRIU within the simulate peak diagnostic window.
5. Press Run/Stop to disable peak generation.
The detector generates the peaks on the trace, chart, or data system display until you
disable the Simulate peak diagnostic function. The amplitude of the test peaks is
affected by your choice of filter time constant.
When it is enabled, the choice list changes to read “Disable test peaks”. To disable this
diagnostic, press 1, “Disable test peaks from the other diagnostics choice list”, or
press Run/Stop.
7.2.5.4 Valve
From the other diagnostics choice list, press 4, Valve, to display status of the purge
and recycle valves.
Note:
This diagnostic function also allows you to change or test the on/off position in
both the purge and recycle valves.
Figure 7–8: Purge and Recycle Valve screen