4 malfunctions – maintenance, Care, Maintenance by metrohm service – Metrohm 753 Suppressor Module User Manual
Page 28: Shutdown, Exchanging the pump tubing, Regeneration of the suppressor, Cleaning the suppressor, Exchanging the suppressor, Braking range adjustment, 4malfunctions – maintenance
4.1 Malfunctions and their rectification
753 Suppressor Module / 8.753.1003 Instructions for Use
25
4
Malfunctions – Maintenance
4.1
Malfunctions and their rectification
If difficulties appear with the IC system during analysis, their cause are
best investigated in the order separating column
→
→ pump →
→ eluent
→
→ IC system. An overview of possible malfunctions, their causes and
remedies can be found in the instruction manuals of both 690 Ion
Chromatograph (section 6.5) and 732/733 IC System (section 5.3.2).
In addition to these general malfunctions the table below contains oth-
ers which might arise as a result of the operation of the 753 Suppressor
Module.
Malfunction
Cause
Rectification
Insufficient or non-
existing flow rate
•
Contact pressure too low
•
Pump tubing faulty
•
Blocked connections
•
Suppressor blocked
•
Set contact pressure correctly: Press
contact pressure lever 55 on the tubing
cartridge down as far as it will go. Press
contact pressure lever 55 upwards until
the solution just starts to be drawn in.
Then press contact pressure lever up-
wards until it clicks once more to obtain
optimal contact pressure.
•
Exchange pump tubing
(see section 4.2.4)
•
Carry out a step-by-step check of the
connections and connectors and if nec-
essary clean or replace them. If the con-
nections to or from the suppressor are
blocked then remove the suppressor and
clean it (see section 4.2.6).
•
Exchange suppressor
(see section 4.2.7).
Leakage
•
Leaking tubing connectors
•
Tighten or replace the leaking tubing
connectors.
Air bubbles in pump
circuit
•
Suction tubing is not immersed
•
Leaking tubing connectors
•
Immerse the suction tubing fully in the
regenerating or rinsing solution.
•
Tighten or replace the leaking tubing
connectors.
Reduced phosphate
sensitivity and/or strong
rise in baseline
•
Reduction of the suppressor
capacity by loading with heavy
metals or organic contamina-
tions
•
Regenerate suppressor (see section
4.2.5) or exchange suppressor (see sec-
tion 4.2.7).