Waters 2414, Обзор и руководство по обслуживанию

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June 11, 2015, 715004754 Rev. A
Page 74
• Autozero delay - Invoked only on autozeros requested from an event input or
remote interface, not from the front panel. The delay range is 0 to 30 seconds
(default is 10 seconds), and the front panel counts down the delay in seconds.
• Enable keypad chart mark - Selected by default, this parameter results in a
chart mark each time one is requested via contact closure or through the front
panel. You can disable this parameter by pressing any numerical key to clear
this box.
5.2.3 Setting up a run in RIU mode
After you press HOME to return to the home screen and select a Detector Output
mode ( “Configuring the detector” on page 84 ), you can set the detector up for a run.
In addition to Detector Output mode, you must program the following parameters
before beginning a run:
• Attenuation (RIU-FS)
• Filter type
• Time constant
• Detector oven temperature
• Column heater module temperature (if available or present)
Depending on other functions you can choose to perform during a run, it can be
necessary to program several other parameters. The table on page 69 contains the
function descriptions, fields, screen number, type of function, display units, allowable
ranges, and the default settings for the home screen and the secondary function
screens.
5.2.4 Programming timed events, threshold events, and
methods
Note:
Programmed methods are available in RIU mode only.
You can store and retrieve up to 10 methods. The detector references stored methods
by assigning them numbers 1 through 10. An asterisk in the method number icon
indicates the current conditions are not stored. If you are operating using a stored
method, then the method number is displayed on the RIU mode initial home screen.
If you edit a parameter setting such as RIU-FS or temperature, you are editing the
current conditions (Method *), which you can store as a method. You can store the
method in one of the 10 available method storage slots, or you can replace the
method with one of the previously stored methods. When you retrieve a previously
stored method, you replace the existing method conditions with those of the stored
method. The method number displayed on the home screen is that of the retrieved
method until you make a change. Any parameter change (for example, RIU-FS or
temperature) alters the current conditions so that the original recalled method is no
longer in effect, causing the method number to change to an asterisk.
If the detector is powered-off, for any reason, and the restarted, the settings of the
operating parameters in effect at the time of system shutdown are restored.
On startup, an asterisk always appears inside the method icon on the RIU mode Home
screen.