Starting a Run 195
In addition to the current system conditions, the Operate Gradient screen displays the
screen keys described in Table 11-1.
11.3.2 Running a Gradient
Setting Initial Conditions
To start the pump at the initial conditions of the gradient table you want to run, press the
Initial screen key from the second Operate Gradient screen (see Figure 11-4).
Using the Rheodyne 7725i Manual Injector
To begin a run with the Rheodyne 7725i manual injector:
1. Load the injector loop with sample. See Section 11.1.1, Using the Rheodyne 7725i
Manual Injector.
2. Turn the injector handle to the Inject position to make the injection. The injector
sends an Inject signal to the controller.
Using a Non-PowerLine Autoinjector
Note: If you are using an autoinjector, see the documentation provided with that product
for information on sample loading.
Table 11-1 Second Operate Gradient Screen Keys
Key Function
Start Run Starts the gradient and the run-time clock at 0.00 minutes.
Initial Starts the pump at the initial conditions of the table. Press the key
to ensure that the system is at the initial conditions of the
gradient table you want to run before starting the run or making
an injection.
Stop Flow Sets the pump flow to zero and suspends the run time.
More Displays an additional set of screen keys associated with the
Operate Gradient screen.
Hold Holds conditions at the current state and suspends the run time.
Alarm Cancel Shuts off the reminder alarm.
Resume Run Allows the run-time clock to continue after you press the Hold or
the Stop Flow key.
Help Displays the Help screen for the Operate Gradient screen.
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