Metrohm 896 Professional Detector – Amperometry - Manual (Page 43)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6 Troubleshooting
2.896.0020 896 Professional Detector – Amperometry
￭￭￭￭￭￭￭￭ 35
6.5 Problems with the pressure
Problem Cause Remedy
Marked drop in
pressure. IC system – Leak in the sys-
tem. Check capillary connections and seal them.
Marked rise in pres-
sure. IC system – Inline filter
blocked. Replace filter platelets (see Chapter Handling
and maintenance in the manual for the IC
instrument).
IC system – Separation col-
umn contaminated. ￭ Regenerate the separation column (see
Chapter Handling and maintenance in the
manual for the IC instrument).
￭ Replace the separation column (see Chap-
ter Handling and maintenance in the man-
ual for the IC instrument).
Note: Samples should always be micro-filtered
(see Chapter Handling and maintenance –
Inline sample preparation in the manual for
the IC instrument).
Amperometric detector –
Preheating capillary
blocked. Preheating capillary maintenance (see Chapter
5.2.2, page 29).
Amperometric detector –
Detector output capillary
not free of blockage. Test the detector output capillary (see Chapter
4.4, page 20).
6.6 Problems with the measuring signal
Problem Cause Remedy
Measuring signal
"overload". Air bubble in the measur-
ing cell. Deaerate the measuring cell (see Chapter 4.6,
page 24).
Measuring cell – Working
electrode damaged. Replace working electrode.
Measuring cell – Measur-
ing cell not correctly con-
nected. Check cable connections (see Chapter 4.7,
page 25).
Software – Measurement
potential incorrect. Optimize the measurement potential.