184 Creating Gradient Controller Time-Based Tables
Hint for Event 5
To program a beeping alarm, specify Pulse instead of On.
If you turn on the alarm, include another step to turn off the alarm. Otherwise, manually
turn off the alarm by pressing the Cancel Alarm screen key on the Operate Gradient screen
(see Figure 11-4).
Hints for Events 8 and 9
Note: Do not program events 8 and 9 in the same table.
Program events 8 or 9 at the end of the table to initiate the use of new tables.
Event 8 maintains the initial conditions of the new table until the next injection occurs.
Event 9 executes the new table without waiting for an inject signal. Use Event 9 to execute
a table that changes conditions and equilibrates the system before the next injection
occurs. Event 9 is useful in automated separations development.
Hints for Event 10
Note the following considerations when using Event 10:
• Event 10 is designed to turn the lamp off at the end of an unattended (e.g.,
overnight) run. You should physically turn the lamp on (not use event 10) prior to
the next analysis to assure sufficient lamp warm-up and baseline stability.
• Waters 486 lamp status is checked at the beginning of each run. If the lamp is turned
off via Event 10 at the start of a run, the system returns to IDLE and the error
message
Unable to Set Up Detector appears.
• Do not program event 10 to use a Pulse action.
Event Actions
The action selections for events 1 through 5 are:
• 0 = Off
• 1 = On
• 2 = Pulse (generates 600 millisecond pulse)
Event 6 (sparge) requires specification of a sparge rate between 0 and 100 mL/min.
Event 7 requires that you specify a column heater temperature value in °C that is greater
than ambient temperature but less than the maximum temperature (99 °C for the standard
heater) permitted by the column heater.
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