Metrohm 940 Professional IC Vario TWO, Руководство пользователя

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6.1
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940 Professional IC Vario TWO (2.940.2100)
6 Troubleshooting
Problem Cause Remedy
Marked drop in
pressure.
Leak in the system. Check the capillary connections and seal leaks,
if necessary
(see Chapter 3.2, page 14) .
The baseline has a
large amount of
noise. The eluent is not suffi-
ciently degassed. Ensure that the connectors for the eluent
degasser are firmly connected
(see Chapter
5.6, page 50) .
The eluent path has a leak. Check the eluent path and fix the leak.
If necessary, tighten the pressure screws using
a wrench (6.2739.000).
High-pressure pump – Con-
taminated pump valves. Clean the pump valves (see Chapter 5.8, page
52) .
The eluent path is blocked. Check the eluent path and eliminate the block-
age.
Contaminations in the elu-
ent Check the quality of the chemicals and the
water.
High-pressure pump –
Defective piston seals. Replace the piston seals (see Chapter 5.8,
page 52) .
The pulsation absorber is
not connected or is defec-
tive. Connect (see Chapter 3.11, page 27) or
replace the pulsation absorber.
The baseline is drift-
ing. Thermal equilibrium is not
yet attained. Condition the instrument with the column
thermostat enabled until the baseline is stable .
Leak in the system. Check all capillary connections and seal leaks,
if necessary
(see Chapter 3.2, page 14) .
The organic solvent in the
eluent is evaporating.
￭
Check the eluent bottle cap (see Chapter
3.7, page 22) .
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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) .