Agilent Technologies 1290 Infinity User Manual page 212

4
Appendices
DLW Principles and Operating Details
Additional Valve Toggle Step to DLW Standard Cycle
Considerations for additional Stator Wash Cleaning Step
The DLW Standard Cycle has the built-in option for the user to toggle the
injection valve at the end of the chromatographic run before equilibration of
the column to the start conditions. If the method variable Stator Wash is set to
1, the extra cleaning process for the valve, with Valve Toggle, is part of the
standard cycle.
If the method variable is deactivated (setting 0), the DLW Standard cycle ends
as shown in
The macro (cycle) is written such that the optional valve toggle steps can be
executed before re-equilibration of the column. The time to switch the valve
needs to be synchronized with the chromatographic method by the user,
method variable Delay Stator Wash. The two wash solvents are timed by the
method variables Stator Wash Time Solvent 1 and Stator Wash Time Solvent 2. After
these wash times have elapsed, the valve is switched back to the start position.
Figure 94
Wash or Valve Toggle times.
Figure 94
212
Figure 93 on page 211
on page 212 illustrates the recommended retention time for Stator
Timing for Stator Wash Step
Agilent 1290 Infinity LC Injectors HTC/HTS User Manual