Metrohm 940 Professional IC Vario ONE/ChS/PP - Manual (Page 107)

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6 Troubleshooting
940 Professional IC Vario ONE/ChS/PP (2.940.1300)
￭￭￭￭￭￭￭￭ 99
Problem Cause Remedy
Individual peaks are
greater than
expected. Sample – Sample carry-
over from the previous
measurement. Check the rinsing time (see "Checking the rins-
ing time", page 94).
Suppressor – Insuffi-
cient flow of regen-
eration solution or
rinsing solution. There is a leak in the sys-
tem. Check all connections.
Peristaltic pump – Contact
pressure too weak. Correctly set the contact pressure .
Peristaltic pump – Filter
blocked. Replace the filter (see Chapter 5.13.2.2, page
92).
Suppressor – Backpressure
too high. Clean the suppressor (see Chapter 5.12.3.3,
page 86) or replace parts (see Chapter
5.12.3.4, page 88).
Peristaltic pump – Pump
tubing defective. Replace the pump tubing.
The background
conductivity is too
high. The suppressor is not con-
nected. Connect the suppressor (see Chapter 3.13,
page 30).
The incorrect eluent is
being used. Change the eluent (see Chapter 5.5.2, page
65).
Suppressor – No or insuffi-
cient flow of regeneration
solution or rinsing solution. Check the flow of the regeneration solution
and the rinsing solution .
The retention times
are poorly reprodu-
cible. The eluent path has a leak. Check all of the connections along the eluent
path and fix the leak.
The eluent path is blocked. Check the eluent path and fix the blockage.
The eluent contains gas
bubbles. ￭ Inspect the connectors for the eluent
degasser .
￭ Deaerate the high-pressure pump (see
Chapter 3.19, page 49).
Baseline increasing
strongly. Suppressor – Reduced
capacity. Regenerate the suppressor (see Chapter
5.12.3.2, page 85).
SPM – Reduced capacity. Regenerate the SPM (see Chapter 5.12.3.2,
page 85).