Metrohm 853 IC CO2 Suppressor - Manual (Page 18)

4 Troubleshooting - Problems
853 CO
2
Suppressor / Instructions for Use 8.853.8001EN
12
4 Troubleshooting - Problems
4.1 Remedying faults and problems
If difficulties occur during analyses with your IC system then it is best to
search for their causes in the following sequence: column → pump →
eluent → IC system. In the Instructions for Use of your Modular IC
system or Compact IC you will find an overview of possible faults to-
gether with their causes and remedies.
In addition to these general problems, the following section covers
those problems which could arise from the use of the 853 CO
2
Supp-
ressor.
4.2 Chromatography problems
Problem Cause Remedy
Poor retention time
reproducibility
• Leak in the instrument.
• Blockage in flow path.
• Contact Metrohm Service.
• Check the capillary connections
and replace any compressed
capillaries
Noisy or unstable
baseline • Leak in the instrument.
• Blockage in flow path
• CO
2
cartridge exhausted
• Vacuum pump faulty
• Contact Metrohm Service.
• Check the capillary connections
and replace any compressed
capillaries
• Replace CO
2
cartridge (see Sec-
tion 4.4.3)
• Contact Metrohm Service.
High pressure in the
system • Pressure screws
tightened up too far.
• A liquid-transporting
component in the device
is blocked.
• Loosen pressure screws slightly
or replace connection (cut new
capillary end)
• Contact Metrohm Service.
Poor peak shape • Dead volume in system • Check capillaries