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6 troubleshooting, 1 problems and their solutions, Problems and their solutions – Metrohm 872 Extension Module Suppression – MCS User Manual

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6 Troubleshooting

872 Extension Module Suppression – MCS

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43

6 Troubleshooting

6.1

Problems and their solutions

Problem

Cause

Remedy

Marked rise in pres-
sure

Suppressor – blocked.

Regenerate the suppressor (see Chapter
5.4.3.2, page 36)
.

Note: 6.2821.180 pump tubing connection
with filter must be used.

Peak areas lower
than expected

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 20)
.

Peristaltic pump – filter
blocked.

Replace the filter (see Chapter 5.3.2.2, page
34)
.

Peristaltic pump – pump
tubing defective.

Replace pump tubing (see Chapter 5.3.2.1,
page 33)
.

Very noisy baseline

MCS –
CO

2

adsorption cartridge

exhausted.

Replace CO

2

adsorption cartridge (see Chapter

5.5.1, page 41).

MCS – vacuum pump
defective.

Contact the Metrohm Service.

Background conduc-
tivity too high

Suppressor – not connec-
ted.

Connect the suppressor (see Chapter 3.6,
page 21)
.

MCS – not connected.

Connect the MCS.

Suppressor – regeneration
or rinsing solution flow
problems.

Check the flow of the regeneration and rinsing
solution (see Chapter 3.6.2, page 24).

Suppressor – No (or
insufficient) pump-
ing of regeneration
or rinsing solution

Leak in the system.

Check connections.

Peristaltic pump – contact
pressure too weak.

Correctly set contact pressure (see "Set the
contact pressure", page 20)
.

Peristaltic pump – filter
blocked .

Replace the filter (see "Replacing the filter",
page 34)
.