Waters Prep series
1-7
sample forced past the pump seal from the discharge side of the pump. Wash
solvent flows from a reservoir to the wash pump and then to a cavity behind
the main pump seal of one pump head. From there, it flows to the cavity
behind the second head’s seal. It then returns to the reservoir or proceeds to
waste, depending on your choice.
The wash pump runs whenever the controller is on, circulating solvent by
pushing a small volume along the flow path, one pulse per minute.
PrepLC controller
The figure below shows the Waters PrepLC controller, which controls solvent
composition, flow rate, sparging, and external events, during a run.
PrepLC controller front panel
The controller’s rear panel, shown below, provides connection terminals and
communication ports for operating with external devices.
Liquid crystal
display
Screen keys (4)
Function
keys (4)
HOME key
Cursor movement keys
Number keys (11)
CLEAR key
Contrast
keys (2)
ENTER key
On/off
switch
Summary of Contents for HPLC
Page 34: ...1 24 Overview...
Page 84: ...2 50 Installing the System...
Page 130: ...3 46 Troubleshooting Testing and Maintenance Test results with all valves working...
Page 174: ...A 14 Safety Advisories...
Page 190: ...D 10 Solvent Considerations...
Page 198: ...Index 8 Waters Technical Service contacting 3 2 Workstations Empower 2 15 MassLynx 2 15...