Metrohm viva 1.1 (ProLab) - Manual (Page 1052)

9.2 Troubleshooting
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1040 ￭￭￭￭￭￭￭￭
viva 1.1 (for process analysis)
8 Select the Portrait or Landscape option under Orientation.
9 Click on [OK].
The determination overview opens as a PDF file.
9.1.9 No help available
NOTE
There is unfortunately no help available for this topic.
9.2 Troubleshooting
9.2.1 894 Professional CVS
Problem Cause Remedy
An electrode cable
has broken. The cable has accidentally
been jammed in the mea-
suring head cover or a
cable contact has been
kinked. Replace the electrode cable set (see Manual
894 Professional CVS).
Conditioning takes a
long time. The reference electrode is
not yet equilibrated. After maintenance of the reference electrode,
wait for at least 20 min before starting a mea-
surement.
The working electrode is
contaminated. Condition the working electrode in pure VMS.
The electrode tip of the
working electrode has
been in use for a long
period. ￭ Immerse the electrode tip in c(NaOH) =
0.5 mol/L for approx. 10 min and then
thoroughly rinse with distilled water.
￭ Replace electrode tip if necessary.
VMS is contaminated. Check reagents for purity. (Only reagents of
sufficient purity, i.e. > 99%, should be used.)
The water quality is poor. Use distilled water, type-II grade (ASTM
D1193-91) or higher.
The measuring solution has
been contaminated as a
result of diffusion. No infeed tubing other than the 4-fold micro
dosing tip (6.1824.000) may be immersed in
the measuring solution.