Metrohm 850 Professional IC Anion MSM-HC - LP-Gradient - Manual (Page 108)

6.1 Problems and their solutions
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850 Professional IC Anion MSM-HC LP Gradient
Problem Cause Remedy
Sample – Sample loop not
(completely) filled. Prolong the sample transfer time.
Sample – Gas bubbles in
the sample. Use the sample degasser (see Chapter 3.15,
page 45) (if available).
Peristaltic pump –
insufficient or no
delivery rate Peristaltic pump – contact
pressure too weak. Correctly set contact pressure (see "Set flow
rate", page 59).
Peristaltic pump – filter
blocked. Replace the filter (see Chapter 5.12.2.2, page
93).
Peristaltic pump – pump
tubing defective. Replace pump tubing (see Chapter 5.12.2.1,
page 92).
Very noisy baseline High pressure pump – con-
taminated pump valves. Clean pump valves (see "Cleaning the inlet
valve and outlet valve", page 76).
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 "Replacing the piston
seal", page 73).
Pulsation damper not con-
nected. Connect the pulsation damper (see Chapter
3.14, Page 44).
Pulsation damper not con-
nected. Connect pulsation damper (see Chapter 3.14,
page 44).
Background conduc-
tivity too high MSM-HC – not connected. Connecting the MSM-HC (see Chapter 3.18,
page 52).
Incorrect eluent. Change eluent (see Chapter 5.4.2.3, page 70).
MSM-HC – regeneration or
rinsing solution flow prob-
lems. Check the flow of the regeneration and rinsing
solution (see Chapter 3.18.2, page 52).
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.