Metrohm 900 - Miscellaneous; SET Titration

31.6 Miscellaneous
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486
￭￭￭￭￭￭￭￭
900 Touch Control
Problem Cause Remedy
The required hardware is
being used in the ongoing
determination.
Wait until the determination is finished.
31.6 Miscellaneous
Problem Cause Remedy
The 900 Touch Con-
trol cannot be
switched on.
The Touch Control is con-
nected to an MSB socket
on the control instrument.
Plug in the Touch Control at the Controller
connector (see manual for control instrument).
31.7 SET titration
Problem
Cause Remedy
The titration will not
be finished.
The minimum dosing rate is
too low.
Define Titration rate = user and increase the
minimum rate (Min. rate) (see chapter 29.3.2,
page 312).
The stop criterion is unsuit-
able.
Adjust the control parameters (see chapter
29.3.2, page 312):
￭ Increase the stop drift.
￭ Select a short delay time.
The sample is over-
titrated.
The control parameters are
unsuitable.
Adjust the control parameters (see chapter
29.3.2, page 312):
￭ Select Titration rate = slow.
￭ Define Titration rate = user and increase
the control range.
￭ Define Titration rate = user and reduce
the maximum rate (Max. rate).
￭ Define Titration rate = user and reduce
the minimum rate (Min. 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 chapter
29.3.2, page 312):
￭ Select Titration rate = optimal or fast.