Troubleshooting 3-31
RI detector
The table below addresses potential RI detector symptoms that can occur
during operation.
Software troubleshooting
Messages appearing on the controller screens during programming or
operation require a response from you. They can be of two types: warning or
shutdown. Other messages might not fit the above categories and do not
require any action.
Error messages appear on the controller screens during programming when
you make these errors:
• Enter an improper value
• Use an unacceptable entry method
RI detector troubleshooting
Symptom Possible cause Corrective action
Spikes on chart; spikes
are synchronous with
pump pulses
Solvent not properly
degassed
Degas solvent. Place
solvent at the level or
above the level of the
solvent proportioning
valve to maintain slight
backpressure.
Loss of sensitivity Foreign material in cell Clean cell and make
sure solvent and
column effluent are
clean.
Source LED needs
replacement or is
misaligned
Call Waters Technical
Service.
Short term noise or drift Fluctuating ambient
temperature
Stabilize environment.
Dirt in cell Clean cell.
Leak in cell Repair or replace cell
assembly.
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