Waters 515 HPLC - Page 11

Table of Contents xi
Powering off the pump .................................................................................. 3-26
4 Maintaining and Troubleshooting the Waters 515 Pump ............. 4-1
Maintenance considerations .......................................................................... 4-2
Safety and handling......................................................................................... 4-2
Proper operating procedures ........................................................................... 4-2
Spare parts....................................................................................................... 4-2
Contacting Waters technical service............................................................... 4-2
Diagnostic tests ................................................................................................. 4-3
Retention time stability monitoring ............................................................... 4-3
Performing the ramp-and-decay test.............................................................. 4-3
Calibrating the pump ....................................................................................... 4-5
Setting zero pressure....................................................................................... 4-5
Setting the head size ....................................................................................... 4-6
Calibrating the flow rate ................................................................................. 4-7
Resetting strokes on seals ............................................................................... 4-8
Cleaning and replacing seals and plungers ................................................ 4-9
Replacing the plunger seals ............................................................................ 4-9
Cleaning and replacing the plungers............................................................ 4-13
Cleaning and replacing check valves ......................................................... 4-18
Cleaning and replacing the inlet check valve............................................... 4-18
Replacing the outlet check valve................................................................... 4-21
Replacing the draw-off valve ....................................................................... 4-24
Required materials ........................................................................................ 4-24
Removing the draw-off valve......................................................................... 4-24
Installing the draw-off valve ......................................................................... 4-25
Troubleshooting .............................................................................................. 4-26
Troubleshooting error messages and pump malfunctions........................... 4-27
Identifying and correcting noises.................................................................. 4-33
Identifying chromatographic problems......................................................... 4-34