Metrohm 940 Professional IC Vario TWO, Руководство пользователя

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6 Troubleshooting
940 Professional IC Vario TWO (2.940.2100)
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73
Problem Cause Remedy
Guard column – Blocked. Replace the guard column (see Chapter 3.19,
page 37) .
Separation column –
Blocked.
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Regenerate the separation column (see
Chapter 5.14.4, page 70) .
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Replace the separation column (see "Con-
necting the separation column", page 41) .
Note: Samples should always be microfiltered .
Injection valve – blocked. Have the valve cleaned (by a Metrohm service
engineer).
The retention times
in the chromato-
gram have changed
unexpectedly. Eluent - Incorrect concen-
tration Create eluent with correct concentration.
Separation column –
Diminished separating effi-
ciency.
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Regenerate the separation column (see
Chapter 5.14.4, page 70) .
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Replace the separation column (see "Con-
necting the separation column", page 41) .
The eluent contains gas
bubbles.
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Ensure that the connectors for the eluent
degasser are firmly connected .
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Deaerate the high-pressure pump (see Fig-
ure , page 36) .
High-pressure pump –
Defective. Request Metrohm Service.
Peak areas are lower
than expected. Sample – There is a leak in
the sample path. Find and fix the leak in the sample path.
Sample – The sample path
is blocked. Find and eliminate the blockage in the sample
path.
Sample – The sample loop
is not (completely) filled. Adjust the transfer time for the sample (see
"Determining the transfer time", page 68) .
Sample – There are gas
bubbles in the sample. Use the sample degasser .
Data of the separa-
tion column cannot
be read.
Column chip dirty. Clean the contact surfaces of the column chip
with ethanol.
Column chip is defective. 1. Save column configuration in MagIC Net.
2. Notify Metrohm Service.