Metrohm 844 UV/VIS Compact IC - Manual (Page 102)

Table of contents
Malfunction Cause Rectification
Extreme peak
broadening,
splitting (double
peaks)
• Dead volume at the co-
lumn ends
• Check the connections
(use PEEK capillaries with
0.25 mm i.d. between
injection valve and
detector block)
• Turn separation column (if
allowed), or replace it
No feed of re-
agent for the
post column
reactor • Contact pressure too
low
• Leak in system
• Defective pump tubing
• Contamination of the
filter in the 6.2821.120
Filter unit PEEK
• Adjust contact pressure
(see Section 2.10.2)
• Check connections and
make leakproof
• Replace pump tubing (see
Section 4.2.5)
• Replace the 6.2821.130
Filter (see Section 2.3.5)
Bleeping of the
gas sensor • Gas in the instrument • Turn off instrument
• If solvent leaked into the
device, remove it.