Troubleshooting the 600E Pump 113
Isolating High Pressure Locations
To isolate the origin of high system pressure, slowly loosen inlet or outlet fittings as
instructed (see Figure 6-1, Figure 6-2, or Figure 6-3) and observe if pressure stays the
same or decreases. Use a tissue to prevent eluent spray and to collect any spilled eluent.
6.2.2 System Pressure Flow Diagrams
This section includes flow diagrams for isolating the source of system pressure problem. It
includes:
• High system pressure troubleshooting (Figure 6-1)
• Low system pressure troubleshooting (Figure 6-2)
• Erratic system pressure troubleshooting (Figure 6-3)
Caution: Always observe safe laboratory practices when troubleshooting. Always wear
safety glasses and gloves. Know the chemical and physical properties of the eluents.
Refer to the Material Safety Data Sheet for the eluents in use.
STOP
Attention: If the source of high pressure is within the detector flow cell, use extreme
caution when relieving high-pressure buildup. Many detectors (especially RI and
fluorescence) have fragile flow cells. Before backflushing the detector to remove the
blockage, review the flow rate specifications and backpressure limits for that flow cell in
the detector operator’s guide.
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