Metrohm 883 Basic IC plus - Troubleshooting

5.1
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883 Basic IC plus
Problem Cause Remedy
Baseline increasing
strongly.
Suppressor – Reduced
capacity.
Regenerate the suppressor .
Chromatograms
have poor resolution
Separation column –
Diminished separating effi-
ciency.
￭ Regenerate the separation column (see
chapter 4.14.4, page 88).
￭ Replace the separation column (see "Con-
necting the separation column", page 53).
Conductivity detec-
tor is not recognized
in the software
No connection to the
detector.
￭ Check the cable connection (16-1).
￭ Switch the instrument off and (after 15 sec-
onds) on again.
Extreme spread of
the peaks in the
chromatogram.
Splitting (dual
peaks)
Capillary connections –
Dead volume in the sys-
tem.
Check the capillary connections (see chapter
3.5, page 14) (use PEEK capillaries with an
inner diameter of 0.25 mm between the injec-
tion valve and detector).
Guard column – Dimin-
ished efficiency.
Replace the guard column (see chapter 3.19,
page 49).
Separation column – Dead
volume at the column
head.
￭ Install the separation column in the oppo-
site flow direction (if the leaflet says this is
permissible) and rinse into a beaker.
￭ Replace the separation column (see "Con-
necting the separation column", page 53).
Precision problems -
the measured values
are highly scattered.
Injection valve – Sample
loop.
Check the installation of the sample loop (see
"Optional: Exchanging the sample loop",
page 29).
Injection valve – Defective. Request Metrohm Service.