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.