Metrohm 930 Compact IC Flex ChS - Manual (Page 89)

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6 Troubleshooting
930 Compact IC Flex ChS (2.930.1200)
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6 Troubleshooting
Problem Cause Remedy
Marked drop in
pressure. Leak in the system. Check all capillary connections and seal leaks,
if necessary (see Chapter 3.2, page 12).
The baseline has a
large amount of
noise. The eluent path has a leak. Check the eluent path and fix the leak.
High-pressure pump – Con-
taminated pump valves. Clean pump valves (see Chapter 5.6, page 53).
The eluent path is blocked. Check the eluent path and fix the blockage.
High-pressure pump –
Defective piston seals. Replace the piston seals (see Chapter 5.6,
page 53).
The pulsation absorber is
not connected or is defec-
tive. Connect (see Chapter 3.8, page 24) or replace
the pulsation absorber.
The baseline is drift-
ing. Leak in the system. Check all capillary connections and seal leaks,
if necessary (see Chapter 3.2, page 12).
The organic solvent in the
eluent is evaporating. ￭ Check the eluent bottle cap (see Chapter
3.5, page 18).
￭ Constantly stir the eluent.
The pressure in the
system markedly
increases. The inline filter
(6.2821.120) is blocked. Replace the filter (6.2821.130) .
Suppressor blocked. ￭ Regenerate the suppressor (see Chapter
5.10.3.2, page 71).
Note: 6.2821.180 pump tubing connection
with filter must be used.
Guard column – Blocked. Replace the guard column (see Chapter 3.15,
page 40).
Separation column –
Blocked. ￭ Regenerate the separation column (see
Chapter 5.13.4, page 79).
￭ Replace the separation column (see "Con-
necting the separation column", page 44).
Note: Samples should always be microfiltered .