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Chapter 5
Running PowerLine in Direct
Control Mode
Once you have familiarized yourself with your system and prepared your system
according to the procedures in Chapters 1 through 4, you can run your Waters 600E
Multisolvent Delivery System in the direct control mode.
Direct Control
All direct-control operations are isocratic. Isocratic operations keep flow rate, eluent
composition, or other time-dependent conditions, constant. To change flow rate or eluent
composition, or to switch output states, you must manually program new values to
override the original parameter settings. The system implements these changes
immediately.
Direct control mode is useful for preparing the system to make a run. You program
direct-control operation through the Direct Control screen (see Section 5.1, Setting Run
Conditions).
By setting parameters on the Direct Control screen, you can do the following without
making an injection:
• Sparge eluents
• Prime the system with new eluent
• Equilibrate the system
• Monitor the baseline
• Set external switch parameters
Before You Begin
This chapter assumes that you have:
• Installed your system and all external devices according to the procedures in the
Waters 600E Multisolvent Delivery System Installation and Maintenance Guide
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