Metrohm 881 Compact IC pro – Anion – MCS User Manual
Page 108
6.1 Problems and their solutions
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881 Compact IC pro – Anion – MCS
Problem
Cause
Remedy
Sample – blockage in the
sample path.
Check the sample path.
Sample – sample loop not
(completely) filled.
Prolong the sample transfer time.
Sample – gas bubbles in
the sample.
Use sample degasser (see Chapter 3.13, page
37).
MCS – not connected.
Connect the MCS.
Peristaltic pump –
insufficient or no
delivery rate
Peristaltic pump – contact
pressure too weak.
Correctly set contact pressure (see "Set flow
rate", page 50).
Peristaltic pump – filter
blocked.
Replace the filter (see Chapter 5.11.2.2, page
86).
Peristaltic pump – pump
tubing defective.
Replace pump tubing (see Chapter 5.11.2.1,
page 85).
Very noisy baseline
High pressure pump – con-
taminated pump valves.
Clean pump valves (see Chapter 5.5.2, page
70).
Eluent – Leak in the eluent
path.
Check the eluent path
Eluent – Blockage in the
eluent path.
Check the eluent path
High pressure pump –
defective piston seals.
Replace (see Chapter 5.5.2, page 70) piston
seals .
MCS –
CO
2
adsorption cartridge
exhausted.
Replace CO
2
adsorption cartridge (see Chapter
Pulsation absorber not
connected. or defective.
Connect pulsation absorber (see Chapter 3.12,
page 36). or replace it.
MCS – vacuum pump
defective.
Contact the Metrohm Service.
Background conduc-
tivity too high
Suppressor – not connec-
ted.
Connect the suppressor (see Chapter 3.17.1,
page 51).
MCS – not connected.
Connect the MCS.
Incorrect eluent.