Metrohm 850 Professiona IC Cation Prep 1 - Manual (Page 98)

5.1 Problems and their solutions
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850 Professional IC –Cation – Prep 1
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 the sample degasser (see Chapter 2.13,
page 42) (if available).
Peristaltic pump –
insufficient or no
delivery rate Peristaltic pump – contact
pressure too weak. Correctly set contact pressure (see "Set flow
rate", page 47).
Peristaltic pump – filter
blocked. Replace the filter (see Chapter 4.10.2.2, page
83).
Peristaltic pump – pump
tubing defective. Replace pump tubing (see Chapter 4.10.2.1,
page 82).
Very noisy baseline High pressure pump – con-
taminated pump valves. Clean pump valves (see Chapter 4.5.2, page
67).
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 piston seals (see Chapter 4.5.2, page
67).
Pulsation damper not con-
nected. Connect the pulsation damper (see Chapter
2.12, page 40).
Pulsation damper not con-
nected. Connect pulsation damper (see Chapter 2.12,
page 40).
Background conduc-
tivity too high Incorrect eluent. Change eluent (see Chapter 4.4.2.3, page 66).
Data of the separa-
tion column cannot
be read. Column chip contamina-
ted. Clean contact surfaces of the column chip
(with alcohol).
Column chip defective. 1. Save column configuration in MagIC Net.
2. Notify Metrohm Service.
Individual peaks
greater than expec-
ted Sample – Carry-over of the
samples from previous
measurement. Rinse system longer between two samples.