32 Performing a Direct Control Run
Table 3-1 Status Screen Parameters
Parameter Description
Method Indicates the current separation method. When you change
any parameter in the Status screen, this field changes to
<direct>.
Flow Indicates the current flow rate of the solvent management
system.
System Indicates the current system pressure in psi, bar, or kPa.
Sample: Set Indicates the user-specified sample compartment temperature.
Sample: Current Indicates the current actual sample compartment temperature.
Composition Indicates the current solvent composition.
S1 – S4 Indicates the status of the event switches on the I/O connector.
Degasser
•Mode
• Vac pump
• Pressure
Indicates the status of the in-line vacuum degasser (if
installed).
Selects the mode of operation: Normal, Continuous, or
Disable
Indicates whether the vacuum pump motor is active or idle.
Current vacuum level in psi, bar, or kPa.
Sparge Indicates the sparge rate cycle for each solvent (if sparge is
installed)
V1 – V4 Indicates the position (open or closed) of each of the valves in
the sample management system. See the
Waters 2690
Separations Module Operator’s Guide
, Section 1.3, Sample
Management System Overview, for a description of the valves.
Pressure Ripple
• Max psi
•Min psi
•Delta psi
Indicates pressure readings in the solvent management system
for the last minute.
Maximum pressure.
Minimum pressure.
Peak-to-peak pressure difference.
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