Metrohm 906 Titrando - Manual (Page 55)

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7 Troubleshooting
906 Titrando
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7.3 SET titration
Problem Cause Remedy
The titration will not
be finished. The minimum dosing rate
is too low. Select the user-defined titration rate and
increase the minimum rate (see manual/help of
the software used).
The stop criterion is unsuit-
able. Adjust the control parameters (see manual/
help of the software used):
￭ Increase the stop drift.
￭ Select a short delay time.
The sample is over-
titrated. The control parameters are
unsuitable. Adjust the control parameters (see manual/
help of the software used):
￭ Select Titration rate = slow.
￭ Select the user-defined titration rate and
increase the control range.
￭ Select the user-defined titration rate and
reduce the maximum rate.
￭ Select the user-defined titration rate and
reduce the minimum rate.
￭ Stir faster.
￭ Arrange the electrode and buret tip to an
optimum.
The electrode responds too
slowly. Replace the electrode.
The titration time is
too long. The control parameters are
unsuitable. Adjust the control parameters (see manual/
help of the software used):
￭ Select Titration rate = optimal or fast.
￭ Select the user-defined titration rate and
decrease the control range.
￭ Select the user-defined titration rate and
increase the maximum rate.
￭ Select the user-defined titration rate and
increase the minimum rate.
The results are
spread widely. The minimum dosing rate
is too high. Select user-defined titration rate and decrease
the minimum rate (see manual/help of the
software used).
The electrode responds too
slowly. Replace the electrode.